Convert a contractor day rate into an annual salary, and see what the same rate is worth across three realistic day counts.
One day rate, three salaries
A day rate does not become a salary until you decide how many days you bill, and the day count is the part people get wrong. At £400 a day the distance between the most optimistic day count and a cautious one is £16,000 of gross income and £8,480 of take-home. Same rate, same rules, three different answers.
The tax is not the uncertain part. Income Tax and National Insurance take £33,923 off the top row, and they are worked out to the pound the moment the gross figure is settled. It is the gross figure that is guesswork, and the first row is the figure people quote.
One day rate, three salaries| Days billed | What that assumes | Gross a year | Take-home a year |
|---|
| 260 | Every weekday of the year, with nothing taken off | £104,000 | £70,077 |
|---|
| 232 | Minus the 28 days a worker is paid for but a contractor is not | £92,800 | £64,381 |
|---|
| 220 | This site's planning assumption for contractor income | £88,000 | £61,597 |
|---|
Why 260 days is a ceiling, not an estimate
260 is 5 days a week for all 52 weeks of the year. It is the convention day rates are quoted against, and it is what the calculator above annualises with, because it is the question a day rate prompts: what is this as a salary?
It is not a forecast. Billing 260 days means working every bank holiday, never being ill, never taking a week off, and moving from one contract to the next with no gap. It also assumes every working day is billable, leaving nothing for invoicing, chasing late payment, renewing insurance, doing the books or finding the next client.
The 220-day row is this site's planning assumption for contractor income. It is an assumption, not a measurement, and it is worth seeing what it implies: the middle row has already taken the 28 days of leave out, so 220 days leaves 12 days to cover illness, admin and every gap between contracts combined. One four-week spell on the bench is 20 working days on its own. If your contracts do not run back to back, treat 220 as a ceiling too, and put your own number in.
The salary you are comparing it against is not the same thing
An employed salary already contains things a day rate does not, so comparing the two gross figures is not like-for-like even when the day count is honest.
Most workers on a 5-day week are entitled to 28 days of paid leave a year as a statutory minimum, and that pay arrives whether they work those days or not. Take the same 28 days out of a contractor's year and the invoicing simply stops. That is the middle row: the same rate, billed across the year an employee is actually paid for.
One condition sits under that row. Bank holidays count towards the 28 days only where the employer chooses to include them; they do not have to be given as paid leave. Where an employer gives the 28 days on top of bank holidays, the year a salaried worker is paid for is shorter still, and the middle row flatters the day rate rather than the salary.
- Paid holiday: 28 days at the statutory minimum for a 5-day week, and often more by contract.
- Employer pension contributions, normally paid in addition to salary rather than out of it — though salary sacrifice and umbrella employment both work differently.
- Statutory Sick Pay, which depends on average weekly earnings and qualifying days, and a notice period once employment is long enough to earn one.
- Employer National Insurance, which is not deducted from an employee's gross pay — though an umbrella worker normally sees it taken from the assignment rate before their own gross is worked out.
Current modelling boundary
Day-rate annualisation multiplies a rate by billable days before tax, pension, gaps between contracts, expenses, umbrella deductions or limited-company assumptions.
- Employment status for tax is decided contract by contract, so a figure worked out for one assignment does not carry over to the next.
- Outside-IR35 limited-company and dividend modelling is not implemented.
- Nothing here recommends an umbrella company, agency or accountant, and no result is approval of a contract or of a status determination.
Status and advice caveats
Contractor outputs are scenario estimates only. PayBreakdown does not decide IR35 status, umbrella compliance, employment status, legal position, tax filing duties, or the best provider structure.
- PayBreakdown does not replace CEST and does not decide whether a contract is inside or outside IR35.
- IR35 and off-payroll status is contract-by-contract and can depend on both contract terms and actual working practices.
- Client, agency, worker, fee-payer and intermediary responsibilities can differ under off-payroll working rules.
- Umbrella workers are employed by the umbrella company; umbrella pay estimates are planning estimates only.
- Umbrella pay depends on the assignment rate, umbrella margin, holiday pay treatment, pension, student loans, expenses, payroll period, and legally required deductions.
- Outside-IR35 limited-company take-home needs corporation tax, expenses, VAT, salary, dividends, pension and accountancy assumptions that are not fully modelled in this module.
- Student-loan treatment can differ in some off-payroll scenarios and should not be simplified into a single deduction rule.
- Use HMRC CEST, official GOV.UK guidance, payroll, agency or professional advice where needed.
- This is not tax, legal, employment, accounting, payroll or financial advice.
What would change this figure
This estimate is worked out on £104,000 annual gross. Change any of those and the take-home figure moves; pension method and student loan plan usually move it most. A payslip can differ from any calculator because payroll works pay period by pay period, so a tax-code change, a bonus, arrears or a refund can land in one month and not the next. See how each deduction is worked out.
Frequently asked questions
Does Day Rate to Salary decide IR35 status?
No. PayBreakdown does not decide IR35 status and does not replace CEST. Status can be contract-by-contract and may depend on contract terms and actual working practices.
Does PayBreakdown model outside-IR35 limited-company take-home?
Not in full. Working out what a limited company actually leaves you with means Corporation Tax on the profit first, then the split between a small salary and dividends, and then dividend tax on top — before VAT treatment, allowable expenses, pension contributions and accountancy fees are accounted for. The director salary and dividend calculator covers the salary-and-dividend part; the rest depends on your own accounts.
Are umbrella pay results final payroll figures?
No. Umbrella estimates are planning estimates only. Real pay can differ because of the umbrella margin, holiday-pay treatment, pension, student loans, payroll period, expenses and provider-specific deductions.
Is this tax, legal, employment or accounting advice?
No. It is not tax, legal, employment, accounting, payroll or financial advice. Check official GOV.UK sources, HMRC CEST, payroll, agency or professional guidance where needed.
Last updated 2026-08-27. Checked by Sean Elsmore. Rates last checked against GOV.UK on 2026-08-07. Estimates are for planning and should be checked against official records where the decision matters.