The short version
On paper, a £500/day contractor outside IR35 takes home ~£74k a year on £100k of fees; the equivalent employed salary of £100k takes home ~£67k. So the contractor's nominally £7k better off. But the contractor pays for their own holiday (28 days × £500 = £14k of foregone income), their own sick days, their own pension contributions (employees usually get 5–8% from the employer), their own equipment, insurance, and the gaps between contracts. Adjust for all of that and the contractor advantage shrinks to maybe £5k–£10k a year — for which you trade predictability, statutory rights, and ongoing income.
If you crave autonomy, like variety, are comfortable with income lumpiness, and have skills clients pay premiums for, contracting wins. If you want predictability, paid time off, structured progression, and someone else to pay for your pension and laptop, employment wins. There's no universally better answer.
Side-by-side comparison
| Factor | Employee | Contractor (outside IR35) |
|---|---|---|
| How you're paid | Monthly salary, fixed | Day rate × billable days, invoiced monthly |
| Tax treatment | PAYE income tax + employee NI deducted at source | Corporation tax on profits, dividend tax on extractions |
| Take-home on £100k gross | ~£67k (PAYE) | ~£74k (outside IR35 via Ltd) |
| Paid holiday | 28+ days statutory minimum | None — every day off is foregone income |
| Sick pay | Statutory Sick Pay £109.40/week; many employers pay more | None — your problem |
| Pension | Auto-enrolment minimum 3% employer + 5% employee | None unless you set up a SIPP and contribute yourself |
| Notice period | Statutory min 1 week per year served, often 1–3 months contractual | Whatever's in the contract — often 1–4 weeks either way |
| Job security | Unfair-dismissal protection after 2 years, redundancy pay | None — contract ends, that's it |
| Equipment | Provided | You buy it (deductible business expense) |
| Training & development | Often funded by employer | Your own time and money |
| Maternity / paternity | Statutory + often enhanced employer scheme | Statutory Maternity Allowance only; no paternity equivalent |
| Bonus / share schemes | Sometimes — annual bonus, RSUs, EMI options | No |
| Mortgage application | 3 months of payslips, easy | Usually 2 years of accounts/tax returns required |
| Day-to-day control | Boss decides priorities, you execute | You decide how, where, when (within deliverables) |
| Career progression | Structured paths, promotions, titles | Self-directed — your own positioning, rate, niche |
| Income tax complexity | P60 arrives in your inbox | Self Assessment, possible VAT, possible corporation tax |
The money question, properly
Naïve comparison: £500/day × 220 working days = £110,000 vs an employed £80,000 salary. Contractor wins by £30k. This is wrong.
Honest comparison:
- £500/day × 170 actually billable days (after holiday, sick, admin, marketing, gaps) = £85,000 gross.
- Minus £3,000–£5,000 overheads (insurance, software, accountant, equipment depreciation).
- Minus £6,000+ that you should be putting in a SIPP to match what the employer was paying.
- That leaves ~£75,000 as the equivalent "salary" — comparable to the £80k employed offer, before any tax-efficiency advantage from running through a Ltd.
Once you factor in the outside-IR35 Ltd structure, you might net £4–£7k more than the equivalent employee. Worth it for the autonomy if that's what you value; not worth it for £4k extra alone.
Run your own numbers with our day-rate calculator and limited-company take-home calculator.
The invisible costs nobody mentions
- Time selling. 10–20% of your year is finding the next contract. Contractors who don't account for this are pricing in 220 billable days and only delivering 170.
- Gaps between contracts. The 2-week, 4-week, 8-week gap. Survivors of the 2020 contractor freeze still remember.
- Late payment risk. Net-30 client paying at day 60 is a £8k+ cashflow problem on a £500/day contract.
- No employer pension. The 5–8% your employer was quietly putting away on your behalf is now your job. If you forget, you'll notice in your 60s.
- No statutory sick pay. A flu week costs you £2,500 at a £500/day rate.
- Career fragmentation. Promotions, structured feedback, internal mobility, the chance to grow into a director role at the same place — these require employment. Contractors progress horizontally, not vertically, by default.
The invisible benefits, too
- Compounding rate growth. Each new contract is a chance to renegotiate up. Employees often have to job-hop for a meaningful raise.
- Pricing power on niches. Specialist contractors (regulated industries, scarce tech stacks, post-merger work) earn 2–3× the rate of generalist employees.
- Tax-efficient retirement saving. Through a Ltd you can pay £40k+ into a SIPP annually, all corporation-tax-deductible. Employees are usually capped by what their employer schemes offer.
- Time autonomy. Working from anywhere, school runs, mid-week errands, gym at noon — the things employees feel guilty about, contractors just do.
- Diverse experience. Five different clients in two years exposes you to more than five years at one employer ever could.
Who suits which?
Contracting suits you if…
- You have a skill clients pay a premium for (specific tech, regulated industry, scarce expertise).
- You can survive 3 months without income while waiting for the next contract.
- You're comfortable with unstructured time and self-management.
- You're confident selling — at least enough to write the next "I'm available from X" email.
- You value autonomy more than predictability.
Employment suits you if…
- You want a predictable monthly income for budgeting.
- You have dependants and need stable benefits (parental leave, sick pay, life insurance).
- You want to climb a defined career ladder.
- You're early-career and would benefit from structured learning and mentorship.
- The thought of finding your own next contract gives you anxiety, not energy.
The hybrid option people forget
Many UK professionals successfully combine employment and freelance income — a 3- or 4-day permanent job plus a day a week on independent client work. You get the benefits floor (sick pay, pension, holiday) plus contractor-style flexibility on your spare day. Your employer needs to allow it (check your contract for restrictive clauses) and you need to register as self-employed for the freelance side. The first £1,000 of self-employed income each tax year is covered by the trading allowance — no need to even declare it.
Run the side-hustle numbers through our tax calculator to see what the mix would mean for your take-home.
On a like-for-like senior role, contractors usually net 5–15% more after accounting for foregone holiday/sick/pension and overheads — provided they stay outside IR35 and can keep a steady book. The headline rate comparison is always misleading; do the proper maths.
Yes, and many do — typically when starting a family, after a long contract drought, or when offered a senior in-house role. The biggest practical issue is mortgage applications during the transition: lenders want either 2 years of contractor accounts or 3 months of new-employment payslips.
Achievable but requires preparation. Most high-street lenders want 2 years of certified accounts; specialist contractor mortgage lenders (Halifax, Clydesdale, Kensington) accept contractors with as little as 12 months of contracts on the same day rate, sometimes via brokers like ContractorMoneyShop or Freelancer Financials.
You're entitled to Statutory Maternity Allowance (£187.18/week for up to 39 weeks in 2025/26) provided you've been self-employed for at least 26 weeks in the test period and paid sufficient Class 2 NI. You don't get Statutory Maternity Pay (that's an employee benefit) and you don't get statutory paternity pay either.
It can be a soft entry — you keep the contract income but the umbrella handles the admin and tax. Take-home will be similar to (or slightly better than) employment, well below outside-IR35 contracting. Good for trialling a contract market without committing to your own Ltd.
Rough multiplier: senior employed salary ÷ 165 = comparable contractor day rate (matching net after holiday + pension + overheads). E.g. £80k salary ≈ £485/day. Below that and contracting is a pay cut; above it and you're genuinely earning more.
Two: undercharging because they're scared of losing the gig, and forgetting to put 30% of every invoice aside for tax. The first kills your sustainability; the second turns the January Self Assessment deadline into a panic.
General career and tax guidance only. Decisions affecting your employment status, mortgage, or family planning should involve qualified professionals (accountant, mortgage broker, IR35 specialist) and your own circumstances.