The gap between your day rate and your take-home
Contractors quote in day rates. HMRC taxes in annual income. Between the two sits a chain of deductions, allowances and structural decisions that most rate benchmarks ignore entirely. A £500/day rate sounds straightforward. Whether it produces a take-home of £67,000 or £52,000 depends on three things that have nothing to do with the headline number: how many days you actually bill, which contracting route you are on, and whether you are using the available tax-efficient structures.
This guide works through all three. It is deliberately not a calculator: the deep arithmetic per route lives in Inside IR35 take-home pay: how the deductions actually work and Outside IR35 take-home pay: what your day rate really leaves you. What this page covers is the method: how to build a realistic income baseline before you touch the tax workings, what the three routes look like side by side at 2026/27 rates, and how to read the assumptions behind any figure you produce.
Step one: how many days will you actually bill?
The single most-distorted figure in any day-rate-to-take-home calculation is the number of billable days. Most people start with 52 weeks times 5 days, then subtract bank holidays. That gets you to around 230 working days. It is the wrong starting point for a contractor.
The realistic billable-days model
Start with 365 days. Remove weekends (104 days) to get 261 working days. Remove the 8 UK bank holidays: 253. Now account for the ways a contractor differs from a permanent employee.
Holiday and personal leave. Most contractors take 20 to 28 days off across the year. Unlike a permanent employee, none of this is paid by the client. Each day off is a day you earn nothing. Building in 25 days of leave takes you to 228 potential billing days.
Bench time. The gap between contracts is often invisible in financial planning and consistently underestimated. Most contractors with more than two years of experience report average gaps of 10 to 20 days per year. A single three-week gap between contracts represents 15 days of zero income. Use 15 days as a conservative planning assumption unless you have a strong pipeline record.
Illness and personal contingency. Self-employed contractors receive no statutory sick pay. A week of illness is a week of zero earnings and, for an inside-IR35 contractor who is not yet through an umbrella with holiday pay, zero compensation. Five to seven days is a reasonable contingency.
Applying these deductions realistically produces a billing target of 175 to 195 days for most contractors. The table below shows the effect on annual income at three common day rates.
| Day rate | 220 days (optimistic) | 195 days (realistic) | 175 days (conservative) |
|---|---|---|---|
| £400/day | £88,000 | £78,000 | £70,000 |
| £500/day | £110,000 | £97,500 | £87,500 |
| £650/day | £143,000 | £126,750 | £113,750 |
The difference between the optimistic and conservative columns is 20 to 25 per cent of annual income. This range is larger, at every day rate, than the difference between a well-run PSC tax structure and a poor one. Benchmarking days is the first financial discipline, not an afterthought.
Why the billing-days gap matters more for contractors than for employees
A permanent employee on the equivalent salary has gaps covered by holiday pay, sick pay and, in redundancy, notice pay. A contractor has none of those by default. The rate premium contractors command over permanent equivalents (the "contractor premium") is partly a market efficiency and partly compensation for exactly these uncovered days. When evaluating whether a day rate is commercially viable, model the net annual income at a realistic billing assumption before comparing it to a permanent salary.
Step two: the three routes and how they affect take-home
Once you have a realistic annual income figure, the next variable is which contracting route applies. The three routes produce materially different outcomes from the same gross income, and the gap between the best and worst case grows as income rises above the higher-rate threshold.
All figures below use 2026/27 rates. These are the rates in effect from 6 April 2026.
Route 1: outside IR35, PSC director (the most tax-efficient structure)
Where a contractor's engagement is genuinely outside IR35 and they operate through a personal service company (PSC), the income flows into the company, is subject to corporation tax, and is then extracted by the director as a mix of salary and dividends. This is the structure that produces the highest take-home from a given contract income, for reasons that are entirely lawful: dividends carry no NIC, and corporation tax at 19% (for profits up to £50,000 in 2026/27) is lower than combined income tax plus NIC on equivalent salary.
Corporation tax (2026/27). The small profits rate is 19% on profits up to £50,000. Above £50,000 up to £250,000 the main rate of 25% applies with marginal relief, producing an effective marginal rate of around 26.5% in that band. Above £250,000 the main rate is a flat 25%. For most single-contractor PSCs with one contract at a time, profits sit in the £40,000 to £120,000 range after salary, so expect a blend of 19% and 25% depending on the level.
Salary level (2026/27). For a single-director PSC with no other employees, the Employment Allowance (£10,500 in 2026/27) is not available. That means employer NIC at 15% applies on any salary above the secondary threshold of £5,000. The practical target is the lower earnings limit of £6,708: this preserves a qualifying NI year (protecting the state pension record) while keeping the employer NIC cost small (15% on the £1,708 above £5,000, or £256). Salary above £6,708 incurs both employer NIC at 15% and employee NIC at 8% with only corporation tax relief to offset, which is typically a net cost at this salary level for a single-director PSC.
Dividend taxation (2026/27). After corporation tax, the remaining profit is distributable as dividends. The £500 dividend allowance (2026/27) is tax-free. Beyond that, dividends are taxed at the ordinary rate of 10.75% where they fall within the basic-rate band (up to £50,270 combined income), and at the upper rate of 35.75% where they fall in the higher-rate band (£50,271 to £125,140). These rates apply from 6 April 2026 under Finance Act 2026 s.4, and are higher than the 8.75%/33.75% rates that applied in 2025/26 and earlier, a genuine narrowing of the PSC advantage that every outside-IR35 contractor should factor into current-year planning.
What this looks like in practice. On a contract income of £90,000 (for example, £500/day at 180 billing days), a PSC with a £6,708 salary, expenses of around £3,000 to £5,000, and no pension contribution will typically produce a post-tax take-home in the range of £62,000 to £67,000. Using an employer pension contribution of £15,000 or more can raise the effective take-home (pension asset plus cash) significantly beyond that figure because pension contributions avoid both corporation tax and dividend tax. The step-by-step arithmetic is in our outside-IR35 take-home guide.
The non-negotiable caveat. This structure only works if the engagement is genuinely outside IR35. Operating through a PSC on an engagement that is actually inside IR35 is a compliance risk, not a tax strategy. The potential cost of a wrong determination includes unpaid PAYE, employer NIC at 15%, interest and penalties, and the personal reputational and cash-flow consequences of an HMRC investigation. Status is the first question, not an afterthought. If you have any doubt about your IR35 position, a professional review via our IR35 status service is the right starting point.
Route 2: inside IR35, PSC receiving a net payment after fee-payer PAYE
Where the end client is medium or large (Chapter 10 of ITEPA 2003 applies), the client issues a Status Determination Statement. If the determination is inside IR35, the fee-payer (usually the agency) operates PAYE and employee NIC on the assignment payment before remitting the net to the PSC. The PSC receives a post-tax amount and there is no second income tax charge on those funds for the worker. However, the tax-efficient salary-and-dividend extraction route is lost on that income.
Deductions at source (2026/27). The fee-payer treats the assignment payment (after deducting any VAT and the direct cost of materials) as a deemed direct payment. From this, PAYE income tax is deducted at 20% on income between £12,570 and £50,270 and at 40% above. Employee NIC is deducted at 8% between the primary threshold (£12,570) and the upper earnings limit (£50,270), and 2% above. On top of the deemed payment to the PSC, the fee-payer also pays employer NIC at 15% on earnings above the secondary threshold (£5,000), which is funded from the gross assignment rate. There is no 5% administrative expenses allowance under Chapter 10 (that allowance exists only under Chapter 8, which applies to small-client engagements where the PSC self-assesses).
Effective deductions on £90,000 contract income. At a contract income of £90,000 (before employer NIC), the fee-payer's employer NIC cost reduces the income available to the worker. After income tax and employee NIC, take-home on this income is typically in the range of £52,000 to £56,000. The precise figure depends on the timing and structure of the deemed payment, whether any pension contributions are made directly, and whether any allowable employment expenses remain (travel and subsistence to the client site is generally not deductible under Chapter 10 once the engagement has a fixed location). For the step-by-step mechanics, including the deemed-payment calculation, see our inside-IR35 take-home guide.
Maintaining a PSC for inside-IR35 work. There is a running cost to keeping a PSC: accountancy fees (typically £800 to £1,500 per year for a straightforward PSC), company administration, business insurance, and the time cost of compliance. For a contractor whose entire workload is inside IR35 and who has no retained profits to manage, these costs reduce take-home further without providing the structural tax advantages the PSC normally offers. An umbrella may be the more economic and simpler route for a fully inside-IR35 contractor.
Route 3: umbrella employment
An umbrella company employs the contractor under an overarching contract of employment, operates PAYE and NIC on the assignment income, and pays the worker a salary. The contractor has none of the company administration burden of a PSC, receives employment rights including holiday pay, and is entitled to receive a Key Information Document (KID) before starting, setting out the rate, all deductions and the expected take-home.
What comes out of the assignment rate. A compliant umbrella funds employer NIC (15% on earnings above £5,000 in 2026/27), the Apprenticeship Levy (0.5% of the payroll bill, payable only by employers whose annual pay bill exceeds £3 million) and the umbrella's margin from the assignment rate before calculating gross pay. The worker's gross pay is then subject to income tax and employee NIC. This means that the assignment rate advertised for an umbrella role is the total cost to the agency/client, not the contractor's gross pay. The effective gross pay is the assignment rate minus employer NIC, minus the levy, minus the umbrella margin.
Holiday pay. Umbrella workers are entitled to statutory holiday pay (5.6 weeks per year). Some umbrellas include holiday pay within the stated assignment rate (rolled-up holiday pay); others pay it separately. Either approach is lawful, but the contractor must understand whether the rate quoted already includes the holiday entitlement or adds it separately. This affects the true rate comparison between umbrella and PSC roles.
The April 2026 change to umbrella liability. From 6 April 2026, the recruitment agency that places a contractor through an umbrella (or the end client where there is no agency) becomes jointly and severally liable with the umbrella for any PAYE and NIC the umbrella fails to remit, under Finance Act 2026 s.24 and the new ITEPA Chapter 11 (ss.61Y to 61Z2). The umbrella remains the legal employer; the change is that HMRC can now pursue the agency or end client for unpaid umbrella PAYE. In practice this means agencies now apply much stricter approved-supplier-list (PSL) controls. Contractors should use umbrellas accredited by the FCSA or Professional Passport.
Umbrella take-home compared with PSC routes. At a £500/day assignment rate (180 billing days, £90,000 total), umbrella take-home after all deductions is typically in the range of £50,000 to £54,000. This is slightly below the inside-IR35 PSC figure because of the umbrella's own margin (typically £15 to £30 per week), but the comparison should also credit the umbrella's elimination of PSC running costs and the value of the employment rights provided. For an inside-IR35 contractor choosing between maintaining a PSC and going through a compliant umbrella, the umbrella is often the simpler and marginally more economic option.
Side-by-side comparison at 2026/27 rates
The table below summarises approximate net take-home across the three routes on a £90,000 contract income (£500/day, 180 days). These are illustrative working estimates at 2026/27 rates: exact figures depend on expenses, pension contributions, salary strategy and the precise deemed-payment mechanics. The two detailed guides linked above provide the full workings.
| Route | Approximate take-home (£90,000 contract income) | Key variables |
|---|---|---|
| Outside IR35, PSC (no pension) | £62,000 to £67,000 | Salary at LEL £6,708; dividends at 10.75%/35.75% (2026/27); CT 19% on first £50k profit |
| Outside IR35, PSC (with £15k employer pension) | £58,000 to £62,000 cash + £15,000 pension asset | Pension avoids CT and dividend tax; effective total value £73,000 to £77,000 |
| Inside IR35, PSC (Chapter 10, fee-payer PAYE) | £52,000 to £56,000 | PAYE at source; employee NIC 8%/2%; no dividend route on this income |
| Umbrella employment | £50,000 to £54,000 | Employer NIC + levy + margin funded from assignment rate before PAYE |
Two things stand out from this comparison. First, the outside-IR35 PSC advantage is real but not unlimited: the gap between outside-IR35-with-pension and umbrella is roughly £20,000 to £25,000 on £90,000 of contract income, but that gap is entirely dependent on the IR35 status being correct. Second, the 2026/27 dividend rate rises (from 8.75%/33.75% in 2025/26 to 10.75%/35.75%) closed the PSC advantage compared with prior tax years. Anyone using a calculator built on pre-2026/27 rates will be over-estimating their outside-IR35 take-home.
A calculator gives you a number; the assumptions give you the truth
Every online day-rate-to-take-home calculator produces a number. Most produce a plausible number. The limitations are not in the arithmetic but in the inputs. The same day rate fed into two different calculators with different assumptions can produce a take-home difference of £8,000 to £12,000 on the same contract. This is not a bug in the calculators; it is the natural result of the fact that take-home genuinely does depend on choices the calculator cannot make for you.
The five assumptions that matter most
1. Billing days. As set out above, the difference between 220 days and 180 days on a £500/day rate is £20,000 of gross income. A calculator that defaults to 220 days will overstate annual income by that amount before a single tax figure is applied.
2. IR35 status. Outside-IR35 PSC and inside-IR35/umbrella produce materially different outcomes. A calculator that defaults to outside-IR35 gives a figure that is only accurate if the status assumption is correct. Status is not a preference; it is a legal determination. Where it is genuinely unclear, use the less favourable assumption for planning purposes until a professional review has been done.
3. Salary level. A PSC director's salary choice between £5,000, £6,708 and £12,570 (the range most commonly modelled in 2026/27) affects both the corporation tax deduction and the NIC cost. There is no single universally optimal salary: the right number depends on Employment Allowance eligibility (a single-director PSC cannot claim it), whether the director has other income consuming the personal allowance, and the corporation tax marginal rate at the profit level in question. A calculator that hard-codes a single salary figure is substituting an assumption for a decision that belongs to the contractor and their accountant.
4. Pension contributions. An employer pension contribution from the PSC is the biggest single lever available to a PSC director. It reduces corporation tax, avoids dividend tax, and is not subject to NIC. A calculator that ignores pension contributions can understate the effective value of an outside-IR35 PSC structure by several thousand pounds per year. The annual allowance is £60,000 (2026/27), and unused allowance from the previous three years can be carried forward.
5. Expenses. Genuine, properly documented business expenses (accountancy, professional indemnity insurance, home-office costs, business travel to temporary workplaces) reduce the company's taxable profit and therefore its corporation tax bill. They also reduce the pool of profit available for dividend extraction, which at the higher-rate band is taxed at 35.75% (2026/27). A modest level of genuine expenses in an outside-IR35 PSC reduces the overall tax burden in a way that a calculator defaulting to zero expenses will miss.
How to use a calculator well
A calculator is the right tool for generating a working estimate and for stress-testing your assumptions. Use it in this order: set the billing days to your realistic target (not the maximum); set the IR35 route to match your actual or expected status; set the salary to reflect the Employment Allowance position of your PSC; include a realistic pension contribution; then look at the sensitivity. How much does take-home change if billing days fall by 20, or if you move from outside-IR35 to umbrella? The sensitivity check tells you how much risk you are carrying in your financial plan.
Use the resulting number as a planning benchmark, not as a guarantee. Then get the underlying assumptions reviewed: your IR35 status by a specialist who has seen your actual contract and working practices, your salary and dividend strategy by a contractor accountant who understands the 2026/27 changes, and your pension planning by someone who knows your existing provision and carry-forward position.
When the PSC route is worth maintaining
The outside-IR35 PSC is worth maintaining where: (a) you have genuine, assessed outside-IR35 status on your current engagement; (b) you have a mix of inside and outside-IR35 engagements and need a vehicle to manage both; (c) you are accumulating profits for a future pension injection or anticipating a qualifying capital event (noting the Business Asset Disposal Relief rate is 18% for disposals from 6 April 2026, and the TAAR at ITTOIA 2005 s.396B bites if you restart the same trade within two years); or (d) your day rate at a realistic billing assumption produces a take-home gap versus umbrella that justifies the PSC running costs and compliance overhead.
For a contractor on a single, long-running inside-IR35 engagement with no other work through the company, the PSC is often an administrative cost centre rather than a tax-efficiency vehicle. In that situation, the umbrella is typically the cleaner answer, particularly after the April 2026 joint-and-several-liability reform, which has pushed agencies to restrict their approved umbrella lists to compliant providers.
The umbrella versus limited company pillar guide covers the structural decision in detail, including the inside/outside mix scenarios and the running-cost crossover point.
The next step
Once you have a realistic income baseline and an informed view of which route applies, the remaining question is whether your current structure and salary/dividend strategy are optimised for 2026/27. The dividend rate rises this year mean that plans built on 2025/26 rates are already stale. If you have not reviewed your extraction strategy since 6 April 2026, the gap between your current arrangement and the optimal one is likely larger than it was a year ago.
For a full review of your structure, IR35 position and profit-extraction strategy, our contractor accountancy service covers all three in a single engagement. We work exclusively with contractors, which means the advice is specific to your situation rather than adapted from a general small-business template.