Getting Hired

Contract vs Permanent Jobs in the UK: The Decision, With the Arithmetic Shown

SK Chauhan · Founder · August 31, 2026 · 17 min read

An agency rang you on Tuesday about a six month contract. The day rate they said out loud is a number you have never been paid, and you did the sum in your head before the call ended: multiply it by five, multiply that by fifty two, and it is comfortably more than your salary. Since then you have been slightly distracted at work.

Then the doubts arrived in the order they always do. What happens in month seven. What happens if you are ill. Whether the mortgage people will ever speak to you again. Whether anyone will hire you back into a permanent job afterwards, or whether you will have quietly stepped off a career track you spent nine years building. And somewhere underneath all of it, a phrase from the advert you did not want to admit you had to look up.

This article is the conversation we have with people at exactly that point. Not a case for contracting and not a case against it. The arithmetic, done properly, plus the parts of the UK market that decide whether the arithmetic works: the off-payroll working rules, umbrella companies, how an agency actually handles each track, and what your CV has to look like on each side of the line.

One note before the numbers. Every figure below is an illustrative worked example chosen so the arithmetic is easy to follow. None of it is a survey finding, none of it is a claim about what any role pays, and you should replace each number with your own before you decide anything. On tax status in particular, this article explains the mechanics only. Your own status determination is a matter for a qualified accountant who has read your contract, not for an article.

Should I take a contract role or a permanent job in the UK?

Compare the whole package, not the headline. A day rate has to cover annual leave, bank holidays, gaps between engagements, sick days and the pension an employer would otherwise fund. Work out your billable days first, then divide the permanent package you are giving up plus your new business costs by that number, and you have the rate you need before contracting is worth anything at all.

That single calculation settles more of these decisions than anything else, and almost nobody does it before accepting. People compare a day rate to a salary, which is comparing a gross input to a net-of-everything output. They are not the same kind of number.

The rest of the decision is about risk appetite, and risk appetite is much easier to judge once you know what the premium actually is. If contracting pays you twelve per cent more for carrying every risk yourself, that is a different decision from contracting paying you fifty per cent more. Both happen. The advert does not tell you which one you are looking at.

What is my day rate actually worth once I take out the weeks I do not bill?

Take 260 working days in a year, then remove the days nobody pays you for. Statutory annual leave in the UK is 5.6 weeks, which is 28 days for someone working five days a week, and that figure may include bank holidays. Add realistic bench time between engagements and a few sick days, and the number of days you actually invoice is closer to 210 than 260.

Here is the whole thing worked through. The numbers are chosen to be round, not to be typical.

Step one: the headline. A rate of 450 pounds a day, across 52 weeks of five days, is 260 days.

450 x 260 = 117,000 pounds

That is the number people do in their head on the phone, and it is the only one that is wrong in every case.

Step two: take out the time off. A permanent employee gets 5.6 weeks of statutory annual leave, and in most professional jobs the bank holidays sit inside or alongside that. England and Wales normally have eight bank holidays a year, Scotland and Northern Ireland differ. Say you intend to take the equivalent of 28 days off, as any human does.

260 - 28 = 232 billable days 450 x 232 = 104,400 pounds

Step three: take out the bench. Contracts end. Sometimes the extension comes through the same week and sometimes you spend a month on the market. Four weeks of bench across a year is not pessimistic for a first-time contractor, it is average planning.

232 - 20 = 212 billable days 450 x 212 = 95,400 pounds

Step four: take out sickness. There is no company sick pay on a day rate. If you do not work, you do not invoice. Five days lost to a bad flu is not a disaster, it is a Tuesday in February.

212 - 5 = 207 billable days 450 x 207 = 93,150 pounds

So a 450 pound day rate produces roughly 93,000 pounds of income in a realistic year, not 117,000. That is a twenty per cent haircut before anyone has mentioned tax, and it comes purely from counting the calendar honestly.

Step five: take out the costs an employer used to absorb. Outside IR35, through your own limited company, you now pay for things that were invisible when you were on payroll.

Cost the employer used to carry	Illustrative annual figure
Accountant and company filings	1,500
Professional indemnity and public liability insurance	500
Pension contribution you now fund yourself	5,000
Training, certification, conferences	1,000
Equipment and software	500
Total	8,500

93,150 - 8,500 = 84,650 pounds

Step six: compare against the permanent package you are leaving. Do not compare against the salary. Compare against the package.

Permanent package component	Illustrative annual figure
Base salary	75,000
Employer pension contribution	3,000
Paid annual leave and bank holidays	already inside the salary
Company sick pay	risk removed, not cash
Training budget and certifications	1,000
Life cover, income protection, private medical	1,000
Comparable total	80,000

So 84,650 against 80,000. The 450 pound day rate that looked like a 56 per cent pay rise is worth around six per cent more, and you are carrying every risk yourself for it.

Step seven: the crossover. Now flip the sum around, which is the version worth memorising. Add your annual business costs on top of the package you are giving up, then divide by the days you expect to bill. The costs go on the top line, not the bottom, because you have to earn them back before you are even level.

Break even: (80,000 + 8,500) / 207 = 428 pounds a day To be genuinely better off by 25 per cent: (100,000 + 8,500) / 207 = 524 pounds a day

Check that against step five and it holds. At 428 a day you invoice 88,596 across 207 days, take off the 8,500 of costs, and you are left with 80,096, which is the package you walked away from. The 450 on the table clears the floor by a little, which is the six per cent we arrived at the long way round.

That is your floor and your target, and you can work them out in ninety seconds before you answer an agency about rate. If your own numbers are different, and they will be, the method is identical: package plus your annual business costs, divided by realistic billable days.

What do inside IR35 and outside IR35 mean for my take home?

Inside IR35 means the engagement is treated as employment for tax purposes, so income tax and National Insurance come off before you are paid, usually through an umbrella company running PAYE. Outside IR35 means it is treated as a genuine business to business contract and your own limited company is paid gross. Inside IR35 gives you no employment rights on its own.

That last sentence is the one first-time contractors miss, and it is the most important. Being inside IR35 makes you an employee for tax. It does not make you an employee for annual leave, sick pay, redundancy or unfair dismissal protection against the end client. You get the deductions without the protections. Nobody explains this on the phone.

The rules themselves are HMRC’s off-payroll working legislation. In broad terms they exist to stop someone who works exactly like an employee from being taxed as a business simply because there is a limited company in the middle. The tests that decide it come from long-standing employment case law rather than from a checklist, and the three that matter most are:

Test	The question behind it	What points towards outside IR35
Control	Who decides what you do, how, when and where	You are engaged to deliver a defined piece of work, not to be directed day to day
Personal service	Does it have to be you	There is a genuine right to send a substitute, and it is real rather than decorative
Mutuality of obligation	Must they offer work and must you accept it	The engagement is for specified work with a defined end, not an open commitment

Two practical points about who decides. Since the private sector reforms took effect in April 2021, and for the public sector since 2017, responsibility for determining status for engagements with medium and large clients sits with the end client, not with you. The client is required to issue a status determination statement and to give reasons. Where the end client is a small company as defined in the Companies Act, the determination stays with your own company. HMRC publishes a tool called Check Employment Status for Tax, known as CEST, on GOV.UK, and clients frequently use it. Its output is only as good as the answers put into it.

Now the part that shows up in your bank account. Inside IR35, the rate you were quoted is usually an assignment rate, and employment costs come out of it before your gross pay is calculated. The employer National Insurance, the apprenticeship levy and the umbrella company’s margin are all funded from that same rate. So a 450 pound assignment rate does not produce 450 pounds of gross pay.

The exact deduction depends on rates that change each tax year, so treat the middle column below as a placeholder you replace with a real illustration from the umbrella before you sign.

Same engagement, two statuses	Outside IR35, own limited company	Inside IR35, via umbrella
Quoted rate	450 per day	450 assignment rate per day
What reaches the payroll calculation	450 into the company, gross	roughly 390, illustrative, after employment costs and margin
Realistic billable days	207	207
Annual figure before personal tax	93,150	around 80,700
Who runs payroll	you and your accountant	the umbrella company
Who determines status	the end client, or you if the client is small	the end client
Employment rights against the end client	none	none

On that illustration, the same 450 pound rate inside IR35 lands close to the 80,000 pound permanent package we compared with earlier, before you fund your own pension out of it, with none of the leave or sick pay funded by anyone but you, and with no notice worth the name. Which is the honest headline of this whole article: an inside IR35 contract at the same nominal rate as your salary equivalent is usually a step sideways in money and a step backwards in security. The contract premium lives outside IR35, or it lives in a materially higher inside rate.

Do not take a status determination as settled because an agency said so cheerfully. Ask for the status determination statement, read the reasons, and have an accountant look at the contract and at how the work will actually be done. Working practices, not paperwork, are what would be examined if it were ever challenged.

If you think the determination is wrong, there is a formal route rather than just a complaint. Where the end client is medium or large, the off-payroll rules give you a client-led disagreement process: you write to the client setting out why you disagree, and the client has 45 days to respond, either confirming the determination with its reasons or issuing a revised one. The original determination stands while the challenge runs, so raise it early rather than three months into the engagement.

What is an umbrella company and what should I ask before signing?

An umbrella company employs you, invoices the agency for your assignment rate, and pays you through PAYE. The agency must give you a Key Information Document before you agree terms, so ask for it if it has not arrived. Then ask which costs come out of the assignment rate before your gross pay is worked out, how holiday pay is handled, and what accreditation the umbrella holds.

Most inside IR35 contracts in the UK are paid this way, and the agency will usually hand you a list of two or three umbrellas they work with. You are allowed to ask questions before you pick one. Very few people do.

The questions to ask an umbrella before you sign, in this order.

The agency has to give me a Key Information Document before I agree terms, so I should already have one. Please send a full take home illustration on this exact assignment rate so I can check it against that document.

On the illustration, show me every deduction taken from the assignment rate before my gross pay is calculated, and label each one.

What is your margin, and is it a fixed amount per week or a percentage?

How is holiday pay handled? Is it accrued and paid when I take leave, or is it rolled into each payment? If it is accrued, how do I claim it and what happens to any balance at the end of the assignment?

Which pension scheme do you auto-enrol me into, and what happens to it when I move to my next assignment?

Am I employed by you continuously between assignments, or does the employment end each time?

Are there any charges other than the margin? Same-day payment fees, joining fees, leaving fees?

Can you confirm you operate standard PAYE with no loans, no annuities, no separate untaxed payments of any kind?

Do you hold an industry accreditation such as FCSA or Professional Passport, and can you send the certificate?

This one goes to the agency rather than the umbrella: what due diligence have you done on this umbrella, and when did you last review it?

Question 8 is there because arrangements which promise unusually high take home pay by routing part of your money outside PAYE keep reappearing under new names. HMRC publishes guidance on working through an umbrella company and warnings about tax avoidance arrangements on GOV.UK, and the liability for unpaid tax in these schemes has historically landed on the worker, not on the promoter. If a take home percentage sounds better than everyone else’s, that is the reason, and it is not a good one.

Two more practical things. Your payslip should reconcile: the assignment rate the agency pays, less the labelled costs, equals your gross pay, less PAYE deductions, equals what arrives. If it does not reconcile, ask until it does. And you can usually change umbrella between assignments without difficulty, so a bad first choice is not permanent.

One significant thing changed in April 2026 and it is worth knowing before the conversation starts. Under rules that took effect on 6 April 2026, the recruitment agency that supplies you, or the end client where there is no agency in the chain, now carries liability for the PAYE and National Insurance due on your assignment if the umbrella fails to pay it over. That is why an agency will insist you use one of its own approved umbrellas rather than one you found yourself: it has real money at risk on that choice. It is also why question 10 above is entirely reasonable to ask. An agency carrying that exposure should be able to tell you what checks it ran and how recently.

Contract versus permanent, across the dimensions that actually differ

Here is the comparison in full. Read the paid leave, sick pay and pension rows carefully, because those are the ones people discover eighteen months too late.

Dimension	Permanent	Contract
Income	Lower headline, paid 12 months a year whatever happens	Higher headline, paid only for days invoiced
Security	Notice period, plus statutory redundancy pay after two years of service	Engagement can end at the notice in the contract, often very short
Unfair dismissal	Protection after two years of service, falling to six months from 1 January 2027, the date the Government has set, under the Employment Rights Act 2025. Great Britain only, as Northern Ireland sets its own rules	No protection against the end client. The engagement simply ends
Notice	Commonly one to three months for professional roles, both ways	Often one week or two, sometimes effectively immediate in the early weeks
Paid leave	5.6 weeks statutory minimum, frequently more, funded by the employer	5.6 weeks statutory as an umbrella employee, but funded out of your own assignment rate. Through your own limited company, every day off is simply a day not invoiced
Sick pay	Company scheme in most professional roles, on top of Statutory Sick Pay	Nothing from the client. As an umbrella employee you may qualify for Statutory Sick Pay from the umbrella. Through your own company, if you do not work you do not bill
Pension	Employer contributes through auto-enrolment	You fund it yourself, or through the umbrella’s auto-enrolment scheme
Career progression	Promotion, internal moves, management track, sponsorship of qualifications	No promotion. Progression is rate, calibre of client and scope of deliverable
Skills breadth	Deep in one estate, one set of tools, one culture	Wide. Five environments in three years, and you keep what you learn
Mortgage and credit	Straightforward. Payslips and a permanent contract	Doable but different. Lenders want a track record and a live contract
How it reads on a CV later	Continuity, ownership, promotion history	Delivery history. Reads well if laid out properly and badly if not
Admin	None. Payroll happens to you	Company or umbrella, invoices, insurance, an accountant, chasing payment
Time to hire	Weeks, sometimes months	Days

Neither column is the correct answer. What the table should tell you is that the two tracks are not the same job paid differently. They are different products, sold to different buyers, on different timescales, and you should choose which product you want to be.

How quickly do UK contract roles move compared with permanent ones?

Contract processes usually run in days. A requirement lands, the agency sends three or four profiles the same afternoon, and one interview decides it. Permanent hiring runs in weeks because more people have to agree, budget sign off is slower, and the successful candidate has a notice period to serve anyway. Availability is worth more on a contract shortlist than polish.

The reason sits in the buyer, not in the process. A permanent hire is a long-term cost line signed off by a hiring manager, their director, finance and HR, and the wrong hire is expensive and slow to undo. A contract requirement is usually a project manager with a budget, a gap in a plan and a date. If the work starts on the fifth, a brilliant candidate available on the twenty-fifth is not a candidate.

That changes what an agency does with you.

What the agency does	Permanent vacancy	Contract requirement
Where the fee comes from	A percentage of first year salary, paid on start, often with a rebate period	A margin on every day you work, paid while you are on site
What they screen hardest for	Fit, stability, motivation, whether you will still be there in a year	Availability, evidence you have done this exact thing, rate
How many they submit	Three to five over a week or two	Three or four the same day, sometimes within the hour
What kills your profile	A gap they cannot explain, a pattern of short stays	A start date that does not work, a rate above the ceiling
How much they invest in you	High. They may work with you for months	Lower per role, but they will call you again every time you are free
What they want in your reply	A considered application	Two lines confirming availability and rate, sent immediately

There is a commercial consequence worth understanding. A contract recruiter earns while you are on site, so their interest in you does not end when you start. It ends when your contract does. That is why good contract recruiters call you six weeks before your end date. It is also why an agency you have completed one clean engagement through becomes the single most useful relationship in your working life. Treat the first one as the beginning of a supply relationship, not as a transaction. The wider mechanics of what happens between clicking apply and a decision are set out in what actually happens after you apply.

Why is a contractor with three short engagements read differently from a permanent candidate with three short jobs?

Because the expectation is different, and the reader knows it. A six month engagement that ended at six months is a job finished on time. A permanent role someone left after six months is a question. The same duration on the page means two opposite things, and which one it means is decided entirely by how you have labelled it.

Where people lose this is by writing a contract history in permanent format. If the CV says “Data Engineer, Retail Bank, March to November 2024” with no other signal, a reader defaults to the permanent interpretation and starts wondering what went wrong. Three of those in a row and you have a stability problem you never actually had.

The fix is a layout pattern, and it is the single highest value change a first-time contractor makes to their CV.

Independent Contractor (through own limited company) | March 2023 to present | London and remote

Retail banking client, London | 9 months | Payments data migration Ran the migration of 14 legacy ledgers onto the new payments platform. Built the reconciliation pack the finance team still runs. Delivered to the go live date with no post go live restatement.

Insurance client, Bristol | 6 months, extended twice from an original 3 | Regulatory reporting Rebuilt the quarterly regulatory extract after the previous process failed two internal reviews. Handed over with runbook and two trained staff.

Public sector body, remote | 4 months, fixed scope | Warehouse cutover Scoped and delivered the cutover from the legacy warehouse. Contract ended on completion as planned.

Everything the reader needs is now on the page. One heading, so the eye does not count employers. Duration stated, so nobody guesses. The words “as planned” and “extended twice” doing quiet work. A deliverable under each, so the record reads as three finished pieces of work rather than three departures.

How do I re-cut a permanent CV for a contract shortlist?

A permanent CV sells continuity, ownership and potential. A contract CV sells evidence that you have already done this specific thing and can start on the date. Same career, different emphasis. You are not writing a new document, you are re-cutting the top third and the verbs.

Three real bullet rewrites, using the same underlying work.

Before, written for permanent: Worked as part of the finance systems team supporting the migration to a new ERP, liaising with stakeholders across the business.

After, written for a contract shortlist: Delivered the finance data migration workstream on a 1,200 user ERP move. Mapped 14 legacy ledgers, built the reconciliation pack, hit the go live date. Six month engagement, completed.

Before: Responsible for the day to day running of the reporting platform and continuous improvement of team processes.

After: Owned a 60 report Power BI estate for a UK retail client. Cut the nightly refresh from five hours to ninety minutes and retired 22 unused datasets. Handed over with documentation.

Before: Involved in various Agile projects using SQL and Python, contributing to team objectives.

After: SQL and Python daily. Three fixed scope deliveries inside engagements of six to nine months: pricing model rebuild, regulatory reporting extract, warehouse cutover. All handed over on completion.

Notice what changed. “Worked as part of” became “delivered”. “Responsible for” became “owned”, with a number attached. Every bullet now ends in something finished. And each one names a duration, because duration is a reassurance on a contract CV and an unexplained fact on a permanent one.

Two more things at the top of the document. Put your availability on the header line, in words, with a date. And put your status position there too, because it is the second question the agency has.

Priya Nair | Data Engineer | London, hybrid or remote Available from 15 September | Seeking outside IR35 engagements, will consider inside for the right scope SQL, Python, Spark, Azure Data Factory, Power BI | 9 years, last 3 on migration and cutover work

That is four lines that answer everything a contract recruiter checks before they open page two. If you want the wider version of why the top of the page carries this much weight, the sorting behaviour behind it is covered in why candidates get rejected at each stage.

What do I say to an agency to signal that I am available?

Short, specific and immediate beats polished. A contract recruiter reading a message wants four facts: what you do, when you are free, what rate band, and whether you have done this exact thing before. Anything longer gets read after the shortlist has already gone out.

Hi James,

Data engineer, nine years, last three on migration and cutover work. My current engagement finishes on 12 September, so I am available from the 15th, London or remote.

Looking at 450 to 500 a day outside IR35, flexible for the right scope. Happy to discuss inside if the rate reflects it.

Most recent: 14 ledger payments migration for a retail bank, delivered to the go live date. CV attached, and I can send references from that engagement.

If you have anything landing in September, do call. I answer my phone.

Priya

Five short paragraphs, every screening question answered, and the last line is not a throwaway. Contract recruiters work the phone, and being reachable is a genuine differentiator. If you want somewhere to send a message like that, start with the contract and permanent roles we are recruiting for.

What comes back, when it works, looks like this:

Priya, good timing. I have a migration piece with a client in the City, six months, outside IR35, determination already done and I can send you the statement. Rate is 475. They want someone on site two days a week and they need a start by the 22nd. Can you talk at 4?

Read what the reply is checking. Date first, status second, rate third, location fourth. The technical conversation happens later or sometimes never, because the agency is trusting your record and letting the client’s interview do the assessment.

How do I negotiate a day rate, especially when they ask for my number first?

Give a band with a reason, not a single number and not the word “flexible” on its own. In contract recruitment the agency needs a figure to check you against a ceiling before they can put you forward, so refusing removes you from the shortlist rather than protecting your position. Say the band, say what moves you inside it, and ask what the client has budgeted.

Here is the whole exchange, in the order it usually happens.

Agency: What sort of rate are you looking for?

You: For a six month outside IR35 piece in London, I am at 450 to 500, and where I sit in that depends on the scope and the on-site expectation. What has the client budgeted for the role?

That does three things. It gives a usable number so you stay on the shortlist. It attaches conditions, so the top of your band has a reason behind it. And it puts the question back, which is entirely normal and which most agencies will answer.

If they will not answer:

You: No problem. Then let me put it this way. If the ceiling is below 450 for an outside IR35 engagement, tell me now and neither of us spends the week on it. If it is at or above that, put me forward at 475 and I will be straightforward with you about anything below it.

And when the role turns out to be inside IR35 at the rate you quoted for outside:

You: I should flag one thing before you submit me. The 450 I gave you was for an outside IR35 engagement. Inside IR35 the employment costs and the umbrella margin come out of the assignment rate before my gross pay, so the same number is a meaningfully different job. For an inside role with the same scope I would be looking at the assignment rate reflecting that. Can you go back to the client with that, or shall I tell you what the equivalent assignment rate looks like?

That is a professional conversation, not a difficult one, and agencies have it every day. What marks you as a first-time contractor is not asking for more money. It is quoting one number for both statuses, which tells the recruiter you have not run the arithmetic.

Two rules for the first engagement. Do not take a rate that only works if every extension lands, because extensions are a hope and not a plan. And do not let a low first rate become your reference point, because the next agency will ask what you were on last time.

Can I get a mortgage in the UK as a contractor?

Many lenders will consider contractors, and some assess a day rate as an annualised figure rather than asking for years of company accounts. What they usually want is a track record of contracting, a current contract with time left to run, and a clean payment history. If an application is already in progress, finish it before you change how you are paid.

The reason this frightens people more than it should is that the high street branch is the wrong place to ask. Lender policy on contractors varies enormously, and the difference between a flat refusal and a straightforward yes is often which lender the application went to rather than anything about the applicant. A broker who works with contractors regularly is the right first call, and the conversation should happen before you resign, not after.

What to have ready, whatever route you take:

A signed current contract showing the rate and the end date
Evidence of the engagement history, ideally continuous, and any extensions in writing
Personal bank statements showing the money arriving
Company accounts if you have them, or the umbrella payslips if you are inside IR35
A realistic view of your income after the day counting exercise earlier in this article, not the headline

The timing point is the one that costs people real money. If you have an offer accepted on a house and a mortgage application moving, do not change your employment status in the middle of it. Lenders re-check employment before completion. Finish the purchase, then contract.

When is contracting the wrong decision?

When a mortgage application is in progress, when your right to work depends on a sponsored permanent role, when your savings would not cover three months without an engagement, and when you have just arrived in a new country and have no local references yet. In all four cases the right move is usually a permanent role first, then contract from a position of safety.

Take those one at a time, because each has a different reason behind it.

Immigration and sponsorship. If your permission to work in the UK is tied to a sponsoring employer, a contract engagement is not simply a job change. Sponsorship is attached to an employer and a role, and contracting through your own company or through an umbrella is a fundamentally different arrangement. This is a question for an immigration adviser and for your sponsor before you have any conversation about rate, not afterwards. Nothing in this article should be read as advice on your immigration position.

The buffer. Contracting without savings is not entrepreneurship, it is exposure. The number people use is three to six months of essential outgoings sitting untouched, and the reason is not the dramatic scenario, it is the ordinary one: a contract ends in December, hiring is slow until mid-January, and your first invoice on the next engagement is paid in February. That is a normal sequence and it is ten weeks without income.

New to the UK market. If you have just arrived, your first UK role is doing two jobs. It is paying you and it is building the local reference base that everything afterwards runs on. Contract shortlists are built on evidence you have done this exact thing in this market, and that is precisely what a newly arrived candidate cannot yet show. A permanent role for a year first is usually the faster route to good contract rates, not the slower one. There is a fuller treatment of that sequencing in rebuilding a career after relocating.

Life stage. Parental leave, a partner between jobs, a health condition that produces unpredictable weeks. Contracting removes exactly the cushions that make those manageable. That is not a reason never to contract. It is a reason to time it.

Common mistakes first-time contractors make

Comparing a day rate to a salary. They are different kinds of number and the comparison always flatters the rate. Convert to billable days first, every time.

Quoting the same rate inside and outside IR35. It tells the agency you have not done the arithmetic, and it costs you the difference on every engagement you take.

Taking the first umbrella on the agency’s list without asking anything. The Key Information Document is not a favour, it is something the agency owes you before you agree terms. Read it, get an illustration on the actual rate, compare two, then choose.

Believing an unusually high take home figure. There is no clever structure that beats PAYE by a wide margin. There are arrangements where the tax bill arrives later, addressed to you.

Assuming inside IR35 comes with employment rights. It does not. Deemed employment for tax and employment status for rights are separate questions.

Not reading the notice clause. Many contracts allow the client to terminate at very short notice, and some have a period at the start with effectively none. Know the number before you resign from a permanent job.

Resigning before the contract is signed and references are cleared. Verbal offers on contract roles collapse when a budget moves. Get the paperwork.

Letting the CV read as a permanent CV. Unlabelled short engagements create a stability question you never had.

Going quiet during an engagement. Six weeks before your end date, tell every agency you know that you are coming free. The people who never sit on the bench are the ones who market themselves while still working.

Forgetting that invoices get paid late. Agency payment terms are commonly weekly or monthly in arrears, and the first payment of a new engagement is the longest wait you will have. Plan for it.

Expert tips from the agency side

Ask for the status determination statement before you accept, not after. It is the client’s document, it should have reasons in it, and an agency that cannot produce it is telling you something.

Keep one clean sentence ready for “why do you contract”. More on the wording below, but have it ready before the first call, because it is asked every time.

Get a reference in writing at the end of every engagement. Ask on your last week, while people still remember the detail. Contract references go stale faster than permanent ones because your sponsor moves on.

Track your own billable days. At the end of year one you will know your real utilisation, and every rate decision afterwards gets easier.

Do not take the extension for granted. Start the conversation about it eight weeks out, and start looking at six weeks out regardless of what you are told.

Register properly with three agencies, not thirty. Contract work comes from recruiters who remember your name and know your dates. That is a small number of relationships kept warm, not a mailing list.

Tell agencies your actual availability date, and keep it accurate. Being reliable on dates is most of your reputation in this market.

Keep a permanent-format version of your CV alive. If you go back to permanent work in three years, you will want the continuity narrative already written rather than reconstructed under pressure.

Get an accountant before the first invoice, not at year end. The set up decisions are cheaper to make correctly than to unwind.

Ask someone outside your head to sanity check the numbers. People about to make this decision are rarely neutral about it, and the arithmetic is easy to get wrong in your own favour. Experienced candidates who want that done properly can use job support that runs on its own without a training programme.

How do I answer “why do you contract” and “why did that engagement end”?

Answer both as normal business facts, not as apologies. Contracting is a delivery model, and an engagement ending on its end date is a success. The failure mode in these answers is defensiveness, because a candidate who sounds like they are explaining something away invites the interviewer to go looking for what it is.

Three answers, at real spoken length. Read them aloud. Each runs about thirty seconds.

“Why do you contract?”

I moved into contracting three years ago because the work I am best at is the finite kind. Migrations, cutovers, the piece of a programme that has to land on a date. In a permanent role I did one of those every couple of years. Contracting, I do two or three, and the range of estates I have seen has made me a lot better at it. I am not doing it to avoid commitment, and I take the handover as seriously as the delivery.

“Why did that engagement end after four months?”

It was a four month engagement. Fixed scope, defined deliverable, and it ended when the cutover completed and the runbook was handed to the internal team. There was a conversation about extending into the next phase, but the next phase was BAU support and that is not what I am useful for. The client would take my call, and I can give you the programme manager’s details.

And the permanent-side version, which is the one that catches people out when they want to come back:

“You have been contracting for three years. Will you actually stay?”

Fair question, and I would ask it. The reason I am looking at a permanent role now is that the last two engagements were the same problem at different clients, and I found I wanted to stay and see the second and third order effects rather than hand over and leave. Contracting taught me to work fast in an unfamiliar estate and to document properly, and I would bring both. What I want next is ownership of something over years rather than months, and that is a permanent job, not a contract.

That last answer works because it names the interviewer’s concern out loud before they have to, then answers it with a reason about the work rather than about money. Never make the reason security. Everyone will understand it and nobody will hire on it.

Will contracting hurt my CV when I go back to permanent work?

Not if you lay it out properly. Contract history is read against a different standard, because engagements are expected to end. Put a single contracting heading at the top with your dates, then list each client with the length and the deliverable underneath. Three finished engagements read as three delivered projects. Three unexplained short jobs read as a pattern.

Beyond the layout, there are two genuine costs of a contracting spell that are worth naming honestly, because they are not layout problems.

The first is line management. If you contract for four years and then apply for a role managing a team of twelve, you have a real gap in recent evidence, and no CV formatting fixes it. If management is your direction, either take engagements with a lead or team-shaped scope, or plan a return to permanent work before the gap gets long.

The second is depth in one organisation. Contractors see many environments shallowly. Permanent staff see one deeply, including the politics, the legacy decisions and the second year consequences of the first year choices. Some hiring managers value that specific thing and will say so.

Both are manageable. Neither is a reason to avoid contracting. They are reasons to decide roughly how long the contracting phase is meant to be rather than drifting through it.

The ten minute decision checklist

Run this before you answer the agency. It takes about ten minutes with a calculator.

If more than three of those are unticked, you are not ready to answer on rate yet. Say you will come back tomorrow. Nobody in contract recruitment will think less of you for taking a day, and everybody thinks less of a candidate who accepts and then unwinds it.

FAQs

Should I take a contract role or a permanent job in the UK?

What do inside IR35 and outside IR35 mean for my take home?

What is an umbrella company and what should I ask before signing?

Will contracting hurt my CV when I go back to permanent work?

Can I get a mortgage in the UK as a contractor?

How quickly do UK contract roles move compared with permanent ones?

When is contracting the wrong decision?

Can an experienced professional get help moving into contracting without a training course?

Yes. Most people moving into their first contract do not need to learn anything new. They need the CV re-cut so an agency can put it on a shortlist the same day, a straight answer ready on rate and availability, and someone chasing submissions. Campus4tech offers standalone job support with no training attached, and we continue working with candidates until they are successfully placed.

Summary

The day rate on the phone is a gross input. Your salary is a net-of-everything output. Until you convert one into the other, you are not comparing anything.

Do the conversion in four steps. Count your realistic billable days, which is 260 minus leave, minus bench, minus sickness, and which lands nearer 210 than 260. Add up the costs your employer used to absorb, which is the accountant, the insurance, the training and above all the pension. Total up the permanent package you are giving up rather than just the salary. Then divide the package plus those costs by your billable days, and you have the rate at which contracting starts to pay you anything at all for the risk. On the illustrative figures used earlier that floor came out at 428 pounds a day. The commonest error is leaving the business costs out of the top line, which flatters every rate you are offered.

Then check the status, because it changes the answer completely. Outside IR35, your company is paid gross and the premium is real. Inside IR35, employment costs and the umbrella margin come out of the assignment rate before your gross pay is calculated, and the same nominal rate often lands close to the salary you left, with none of the leave or sick pay funded by anyone but you, and with no notice worth the name. That is not an argument against inside IR35 work. It is an argument for pricing it differently, which is the single most common thing first-time contractors fail to do.

Everything else is preparation you can finish in a weekend. The CV re-cut into the engagement layout, with the availability date at the top. One honest sentence about why you contract. A rate band with a reason behind it. Three agencies who know your end date. An accountant, a buffer, and a clear-eyed view of whether this is a phase or a career.

Contracting suits people who are good at finite work, comfortable being new, and steady about money. Permanent work suits people who want to own something over years and would rather not think about invoices. Plenty of good careers alternate between the two on purpose. The mistake is not choosing the wrong one. The mistake is choosing either of them from the headline number.

At Campus4tech we spend a lot of time with experienced professionals sitting exactly where you are: working out what an offered rate is genuinely worth against the package they would give up, re-cutting the CV so an agency can shortlist it the same afternoon, rehearsing the rate and availability answers, then handling submissions and interview preparation. Experienced people rarely need a course, so job support runs on its own with no training attached, and we continue working with candidates until they are successfully placed. If you are weighing up a first contract, tell us what you are deciding between and we will run the numbers with you before you answer the agency.

Written by

SK Chauhan

Founder

Works across recruitment delivery and placement strategy at Campus4tech.