ProRata CalculateTeacher Pro Rata Calculator — Term-Time Pay Without the Guesswork
Work out term-time pay with the paid-weeks method. Enter the full-time salary, your hours and your term weeks to see your actual annual pay.
Term-Time Pro Rata Calculator
Enter the full-time, all-year salary for the role, then the hours and weeks that apply to the term-time post.
5.6 weeks is the statutory minimum. Some employers use a slightly higher figure — check the offer letter.
What lands in your bank account?
Gross pay is only half the story. Add your tax region and any pension contribution and this estimate applies 2026/27 Income Tax and National Insurance to the pro rata figure above. Pension is treated as salary sacrifice, so it comes off before tax and National Insurance are worked out.
Estimated take-home: — a year
| Full-time version | Your pattern | |
|---|---|---|
| Gross pay | — | — |
| Income Tax | — | — |
| National Insurance | — | — |
| Take-home | — | — |
Breakdown of your pattern — gross —, pension —, tax —, National Insurance —, leaving — a month and — a week. Student loans, benefits in kind and other deductions are not included.
Why term-time pay has two steps
A full-time, all-year salary assumes 52 paid weeks. A term-time colleague works fewer weeks — but not for free in the holidays: by law the salary must still include paid annual leave of at least 5.6 weeks. So payroll first takes your share of the hours, then multiplies by paid weeks over 52, where paid weeks means the weeks you work plus those holiday weeks. Miss the holiday weeks out and the salary comes out roughly 11% too low; miss the step out entirely and it comes out about 14% too high. Both errors appear in real offer letters, which is why a term time pro rata calculator that displays the paid-weeks line — as this one does in its working — is worth more than one that simply announces a total.
This is also the right tool if you searched for a pro rata calculator for schools: maintained schools, academies, free schools and independent schools all use the same paid-weeks construction, differing only in their term length (38, 39 or occasionally 40 weeks) and their full-time hours, which in schools are often “directed time” figures rather than a standard office week. Use the full-time hours printed in the advert, not an assumption.
Worked examples from school posts
Teaching assistant, 25 hours, term time only. Full-time equivalent salary £26,940 at 32.5 hours; you work 25 hours for 39 term weeks plus 5.6 holiday weeks. Hours share: 25 ÷ 32.5 = 0.7692. Paid weeks: 44.6, a factor of 0.8577. Salary: £26,940 × 0.7692 × 0.8577 = £17,774 a year, paid as twelve instalments of about £1,481. Feed the same figures into the calculator above and the working line will show both steps.
School administrator, full weeks but short days. If you work all year but only 20 of 37 hours, there is no paid-weeks step at all — you are a part-time all-year worker, and the ordinary salary calculator is the right tool. Mixing the two models is a frequent payroll error in schools precisely because both patterns sit side by side in the same office.
Exam invigilator and casual staff are usually hourly-paid rather than salaried, so pro rata does not apply in this form; leave for those roles accrues at 12.07% of hours worked, covered on the holiday calculator.
Starting or leaving part-way through the year
Because pay is smoothed across twelve months while work happens in about thirty-nine weeks, anyone joining or leaving mid-year will owe, or be owed, a balancing amount. Leavers in July have typically been underpaid relative to weeks worked (they received eleven twelfths spread while working most of the year’s terms, depending on start date), while a February starter who leaves in July may have been overpaid. Neither adjustment is a penalty — it is the smoothing unwinding — but you are entitled to see the calculation. Ask for paid weeks to your leaving date, instalments received, and the difference; the three lines should reconcile to the final payslip.
Questions people ask
Two multiplications instead of one. First your hours are compared with full-time hours, then the result is scaled by paid weeks divided by 52. A pro rata salary calculator term time version that skips the second step will overstate a term-time salary by roughly a sixth — always check both steps are present in an offer letter.
Term weeks worked — commonly 38 or 39 — plus paid holiday of at least 5.6 weeks, giving 43.6 to 44.6 paid weeks. Some local authorities and academy trusts use slightly higher holiday figures from local agreements. If your contract shows fewer than term weeks plus 5.6, query it before signing.
Because the annual total is divided by twelve and paid in equal instalments. You are not being paid for August; you are receiving the twelfth slice of a salary earned across term weeks. It also means leaving mid-year triggers a balancing calculation, since you may have been paid ahead of, or behind, the weeks actually worked.
Teachers on standard contracts are usually paid on an all-year basis with an FTE fraction only — use the hours tab of the salary calculator with your FTE. The paid-weeks step on this page is for term-time only contracts, most common among support staff, teaching assistants, technicians and some part-time teaching posts in academies and independent schools.
Yes — the term time pro rata calculator method is identical across schools, colleges with term-only contracts, nurseries open in term time and university term-only roles. What varies is the number of term weeks and the local holiday figure, both of which you can type in. A dedicated pro rata term time calculator and a general one differ only in those defaults.
Rates used: UK tax year 2026/27 · Last reviewed: October 2026. Calculations run in your browser — nothing you type is sent anywhere or stored by us.