Freelance Day Rate Calculator

Work out the freelance day rate you actually need — covering take-home pay, sole-trader tax + NI (estimate), pension, business costs, holidays and a profit margin.

Hardware, software, insurance, accounting

Leave time for admin, sales and gaps between contracts

Buffer on top of break-even for quiet periods

Result

Required day rate£447.94
Hourly equivalent (8h day)£55.99
Effective billable days/year182
Gross revenue needed£81,525.71
Est. tax + Class 4 NI£16,704.48
Pension contribution£3,668.66
Break-even day rate (pre-margin)£403.15

How it's calculated

  1. 1

    Billable days = (52 − 5 holiday − 1.5 sick) × 4 days/week = 182

  2. 2

    Taxable profit needed = take-home £50,000 ÷ net-of-tax factor (2025/26 bands + Class 4 NI, estimated)

  3. 3

    Gross revenue = (profit + costs) ÷ (1 − pension%) ÷ (1 − margin%)

  4. 4

    Day rate = gross revenue ÷ billable days

Freelance Day Rate Calculator — FAQs

How do I convert a salary to a freelance day rate?

Divide the equivalent employed salary by ~220 billable days, then uplift for tax, pension, business costs and unbillable time — typically around 1.5× the naive figure. A £60k salary usually needs roughly £400–£450/day to match.

What day rate do senior developers charge in the UK?

Senior developers typically charge £400–£700/day, with London roles and specialist skills (cloud, security, ML, legacy migrations) at the top end. Scarce niche expertise can exceed £800.

How does IR35 affect my day rate?

Inside IR35 you're taxed broadly like an employee (usually via an umbrella company), so you need a higher gross rate for the same take-home. Outside IR35 you can operate through a limited company with more flexibility over salary/dividends. Check status on each contract.

How often should I review my day rate?

At least annually, and at every contract renewal — adjust for inflation, demand for your stack, and whether your billable-days assumption still holds. Regular small increases are easier to defend than a big jump.

Is the tax calculation here exact?

No — it's an estimate using 2025/26 income tax bands and Class 4 NI for a sole trader. Limited company salary/dividend splits, student loans, Scottish rates and VAT all change the picture, so confirm the numbers with an accountant.

Related calculators

Hourly to Day Rate CalculatorIR35 CalculatorSelf-Employed Tax CalculatorTake-Home Pay Calculator UKUmbrella Company Calculator

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