Convert an hourly rate to an annual salary, or pro-rata a full-time salary to part-time hours — with instant Income Tax and NI take-home.
Hourly → Salary
Pro-Rata Salary
52 for salaried staff with paid annual leave included; lower for unpaid weeks (e.g. term-time only)
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Annual Gross Salary
Monthly Gross
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Tax + NI
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Take-Home
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Monthly Take-Home—
Weekly Take-Home—
How to Convert Hourly Pay to Annual Salary
Annual Salary = Hourly Rate × Hours per Week × Paid Weeks per Year. Most UK full-time contracts use either a 37.5-hour or 40-hour week, and 52 paid weeks once annual leave is included. Enter your own hours above for an exact figure — the table below shows common rates at the standard 37.5-hour week.
Hourly Rate
Annual (37.5h/wk)
Annual Take-Home
£12.71
£24,785
£21,364
£15.00
£29,250
£24,580
£18.00
£35,100
£28,792
£20.00
£39,000
£31,600
£25.00
£48,750
£38,620
£30.00
£58,500
£44,487
£40.00
£78,000
£55,797
£50.00
£97,500
£67,107
What Is a Pro-Rata Salary?
Pro-Rata Salary = Full-Time Salary × (Your Hours ÷ Full-Time Hours). If a role is advertised at £35,000 full-time-equivalent (FTE) for 37.5 hours a week and you work 22.5 hours (3 days), your pro-rata salary is £35,000 × (22.5 ÷ 37.5) = £21,000 a year. Income Tax and National Insurance are then calculated on that £21,000 exactly as for any other salary — the Personal Allowance and tax bands are not adjusted for part-time hours.
Browse Hourly Rates by Range
£8 – £20/hr (minimum wage to experienced entry-level)
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An independent calculator applying published HMRC rates and Low Pay Commission minimum wage rates deterministically — no AI estimate, no official affiliation.
Methodology & Sources
Figures use published HMRC Income Tax/NI rates (2026/27) and the gov.uk National Living Wage rate effective 1 April 2026. For your exact position, use gov.uk/estimate-income-tax.
How do I convert an hourly rate to an annual salary?
Multiply your hourly rate by your hours per week, then by the number of paid weeks in a year: Annual Salary = Hourly Rate × Hours per Week × Paid Weeks. The UK standard full-time week is 37.5 hours, giving 1,950 hours a year at 52 paid weeks — though many employers use a 40-hour week instead.
Should I use 37.5 or 40 hours a week?
Use whichever matches your actual contracted hours — both are common in the UK. A 37.5-hour week (7.5h/day, with a paid lunch usually excluded) is typical in office and professional roles; a 40-hour week is common in retail, hospitality and manual roles. The difference is meaningful: at £20/hour it is £2,600 a year in gross pay.
What is a pro-rata salary?
A pro-rata salary scales a full-time salary down proportionally to the hours you actually work: Pro-Rata Salary = Full-Time Salary × (Your Hours ÷ Full-Time Hours). It is used for part-time, job-share and term-time-only roles advertised with a full-time-equivalent (FTE) figure.
Does pro-rata salary include holiday pay?
Yes — statutory holiday entitlement (5.6 weeks for a full-time worker) is also pro-rated to your hours, and for most part-time employees on a fixed weekly pattern it is already built into the annual pro-rata salary rather than paid as a separate lump sum. Irregular-hours and term-time-only workers usually accrue holiday pay per hour worked instead — check your contract.
Is pro-rata pay based on hours or days?
Either can be used, and your contract should specify which. Hours-based pro-rata (your hours ÷ full-time hours) is more accurate when your working pattern varies by day; days-based pro-rata (your days ÷ full-time days, usually 5) is simpler when you work fixed whole days.
Do I pay less tax on a pro-rata or part-time salary?
You pay the same Income Tax and National Insurance rates as anyone else — tax is calculated on your actual annual salary, not your full-time-equivalent figure. Because the Personal Allowance and tax bands are unaffected by hours worked, a lower pro-rata salary will usually mean a lower effective tax rate simply because less of it falls into higher bands.
What counts as full-time hours in the UK?
There is no single legal definition — HMRC and ONS commonly treat 35+ hours a week as full-time, but individual employers define their own full-time week (most often 37.5 or 40 hours) in the contract, and that figure is what pro-rata calculations should use.