Pro Rata Salary Calculator UK: Your Part-Time Pay, Holiday and Take-Home
- 2026/27 tax year
- 8 min read
Your pro rata salary
£18,000
a year, at 60% FTE of £30,000 full-time.
- Per month
- £1,500.00
- Per week
- £346.15
- Hourly rate
- £15.38
- Take-home a month
- £1,373.34
Holiday: 16.8 days (126 hours) a year, including bank holidays.
| Per month (2026/27) | Pro rata | Full-time |
|---|---|---|
| Gross pay | £1,500.00 | £2,500.00 |
| Income tax | −£90.50 | −£290.50 |
| National Insurance | −£36.16 | −£116.16 |
| Take-home pay | £1,373.34 | £2,093.34 |
You earn 60% of the full-time salary but keep 65.6% of the full-time take-home, because your personal allowance doesn't shrink with your hours.
Take-home assumes tax code 1257L, NI category A, monthly pay and 2026/27 rates. Holiday is pro-rated from the full-time entitlement you entered; check your contract for how bank holidays are handled.
This pro rata salary calculator turns any full-time salary into what you'll actually be paid for your hours. Enter the advertised salary and your working pattern, by hours, days or FTE percentage, and you'll see your pro-rata pay per year, month and week, your hourly or daily rate, your holiday entitlement, and your take-home pay after tax for the 2026/27 tax year.
It also works backwards: enter the pro rata salary on your payslip or offer letter, and it shows the full-time equivalent, useful for comparing a part-time role against full-time jobs or checking you're being paid the same rate as full-time colleagues.
Joining or leaving mid-year, or on a term-time contract? Add your dates or paid weeks and the calculator pro-rates your pay and holiday for that period too.
How to Calculate a Pro Rata Salary
A pro rata salary is the full-time salary scaled down to the share of a full-time week you work:
Pro rata salary = full-time salary × (your hours ÷ full-time hours)
Say a role pays £30,000 for a 37.5-hour week, and you'll work 22.5 hours. That's 22.5 ÷ 37.5 = 0.6 of full-time, so your pro rata salary is £30,000 × 0.6 = £18,000.
Year
£18,000
Month
£1,500
Week
£346.15
Hour
£15.38
Notice the hourly rate: £15.38 is exactly what the full-time role pays per hour. Pro rata changes how many hours you're paid for, never the rate, and that's the quickest way to check an offer is fair.
Job adverts usually quote the full-time figure followed by “pro rata”. The number you'll see on your payslip is the scaled-down version, so always run the conversion before comparing offers.
Pro Rata by Hours, Days or FTE
Most contracts pro-rate by hours: your weekly hours divided by the full-time hours. Some, especially in schools, the NHS and the public sector, express it as an FTE (full-time equivalent) fraction such as 0.6, and some simply count days.
Days and hours give the same answer only when your days are the same length as a full-timer's. Three 8.5-hour days is 25.5 hours, which is 68% of a 37.5-hour week, not the 60% that “3 days out of 5” suggests. If your days are longer or shorter than standard, pro-rate by hours.
| Days a week | FTE | Pro rata salary | Holiday |
|---|---|---|---|
| 1 day | 0.2 | £6,000 | 5.6 days |
| 2 days | 0.4 | £12,000 | 11.2 days |
| 2.5 days | 0.5 | £15,000 | 14 days |
| 3 days | 0.6 | £18,000 | 16.8 days |
| 4 days | 0.8 | £24,000 | 22.4 days |
| 4.5 days | 0.9 | £27,000 | 25.2 days |
Holiday uses the statutory 5.6 weeks (28 days full-time), bank holidays included.
Starting or Leaving Part-Way Through the Year
If you only work part of a year, say a fixed-term contract, a mid-year start, or your notice period, your pay and holiday are pro-rated a second time, by the share of the year you're employed. Employers do this in one of two ways:
Working days counts the weekdays in your employment period against the weekdays in a full year (around 261). Calendar days counts every day against 365. They rarely differ by more than a few pounds, but your contract or payroll policy decides which applies, so the calculator offers both.
Example
£18,000 pro rata, employed 1 April to 30 September 2026
- Working days: 131 of 261
- £9,034.48
- Calendar days: 183 of 365
- £9,024.66
Pro Rata Holiday Entitlement
Almost every worker is entitled to at least 5.6 weeks of paid holiday a year. For a full-timer on five days a week that's 28 days, which is also the legal cap, and employers can include bank holidays within it. Part-time workers get the same 5.6 weeks, measured in their own working weeks. See holiday entitlement at GOV.UK.
By days
Multiply your days a week by 5.6. Three days a week gives 3 × 5.6 = 16.8 days, including bank holidays.
By hours
Multiply your weekly hours by 5.6. A 22.5-hour week gives 126 hours of holiday, which is the fairest measure when your days vary in length.
Above the minimum
If full-timers get more than 28 days, your share is pro-rated from their figure: 33 days full-time becomes 19.8 days on 3 days a week.
Pro Rata Take-Home Pay: Why It Isn't Proportional
Your gross pay scales exactly with your hours. Your take-home doesn't, and it works in your favour: the £12,570 personal allowance and the National Insurance threshold are the same whatever hours you work, so a bigger share of a part-time salary is tax-free.
On a £30,000 role, working 60% of the hours earns 60% of the gross pay but about 66% of the full-time take-home. Dropping a day can cost less than you might expect, which is worth knowing before you ask for reduced hours. For the full breakdown on any salary, use our take-home pay calculator.
| FTE | Gross a year | Take-home a month | Share of full-time take-home |
|---|---|---|---|
| 50% | £15,000 | £1,193 | 57% |
| 60% | £18,000 | £1,373 | 65.6% |
| 75% | £22,500 | £1,643 | 78.5% |
| 100% | £30,000 | £2,093 | 100% |
2026/27, England, Wales and NI, tax code 1257L, no student loan or pension.
Term-Time Only Contracts
School support staff and other term-time workers are pro-rated twice: once for hours, and again for the weeks they're paid. Paid weeks are usually the term weeks plus your holiday entitlement, and the salary is then spread evenly over 12 monthly payments.
Your employer will state the paid weeks for your role; enter them under “Paid weeks per year” in the calculator's options.
Pro rata salary = full-time salary × (hours ÷ full-time hours) × (paid weeks ÷ 52.14)
Illustration: a £24,000 full-time role, 30 of 37 hours, with 44.6 paid weeks:
£24,000 × (30 ÷ 37) × (44.6 ÷ 52.14) = £16,645
Your Rights as a Part-Time Worker
The Part-time Workers (Prevention of Less Favourable Treatment) Regulations 2000 mean part-timers must not be treated less favourably than comparable full-time colleagues unless the employer can objectively justify it. Read more about part-time worker rights at GOV.UK.
- The same hourly rate of pay as full-time colleagues doing the same job.
- Holiday, sick pay and maternity or paternity pay on a pro rata basis.
- The same access to pension schemes, training and career development.
- Overtime premium rates only once you've worked more than the full-time hours; extra hours up to that point can be paid at your normal rate.
- A written statement of reasons within 21 days if you ask why you've been treated less favourably.
Frequently Asked Questions
What does pro rata mean on a job advert?
Pro rata means “in proportion”. When an advert says “£30,000 pro rata”, £30,000 is the full-time salary, and you'll be paid a share of it matching the hours or days you work. On 3 days of a 5-day week you'd earn 60% of it: £18,000 a year.
How do I calculate pro rata salary for 3 days a week?
Divide 3 by the full-time days (usually 5) and multiply by the full-time salary. On a £30,000 role that's 3 ÷ 5 × £30,000 = £18,000 a year, or £1,500 a month before tax.
Is my hourly rate lower if I'm paid pro rata?
No. A correctly calculated pro rata salary keeps exactly the same hourly rate as the full-time role. On £30,000 for 37.5 hours, both a full-timer and a 22.5-hour part-timer earn £15.38 an hour; the part-timer simply works fewer hours.
How much holiday do I get working 3 days a week?
At least 16.8 days a year (3 days × 5.6 weeks), including bank holidays. If your employer gives full-timers more than the statutory 28 days, your entitlement is that figure pro-rated: for example 33 days full-time becomes 19.8 days on 3 days a week.
Do part-time workers get bank holidays?
There's no legal right to bank holidays off as extra paid leave; they can count towards your 5.6 weeks. A fair approach many employers use is to pro-rate bank holidays into your total allowance, then deduct a day whenever a bank holiday falls on one of your working days.
Is FTE the same as pro rata?
They describe the same thing from different angles. FTE (full-time equivalent) is the fraction of a full-time role you work, such as 0.6; the pro rata salary is the full-time salary multiplied by that fraction.
Is part-time take-home pay pro rata too?
Not exactly. Gross pay is proportional, but take-home isn't, because everyone gets the same £12,570 personal allowance whatever their hours. Working 60% of full-time on a £30,000 role gives you about 66% of the full-time take-home pay.
Work Out Your Pro Rata Salary Now
Whether you're weighing up a part-time offer, asking to drop a day, or checking a term-time contract, the calculator above turns any full-time salary into your real pro-rata pay, holiday and take-home in seconds. If you're also picking up extra shifts, our overtime calculator shows what those hours are worth after tax.
Results are estimates, not financial or legal advice. Check your contract for how your employer calculates pro rata pay and holiday. See our Disclaimer. Questions or corrections: [contact email].