What does pro rata mean? Pro rata means "in proportion" - your salary is adjusted based on hours worked. Use our free pro rata calculator to instantly work out part-time pay, including 30k pro rata 4 days a week and more.
Your Pro Rata Salary
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0% of full-time
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Monthly Take-Home
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After tax & NI (estimate)
Weekly Gross
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Hourly Rate
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Based on actual hours
Step 1: £30,000 ÷ 5 days = £6,000 per day
Step 2: £6,000 × 4 days = £24,000 annual
Step 3: £24,000 ÷ 12 = £2,000 monthly
Tax: ~£2,286 income tax + £914 NI
Result: £20,650 take-home annually
| Full-Time | 4 Days (80%) | 3 Days (60%) | 2.5 Days (50%) | 2 Days (40%) |
|---|---|---|---|---|
| £20,000 | £16,000 | £12,000 | £10,000 | £8,000 |
| £25,000 | £20,000 | £15,000 | £12,500 | £10,000 |
| £30,000 | £24,000 | £18,000 | £15,000 | £12,000 |
| £35,000 | £28,000 | £21,000 | £17,500 | £14,000 |
| £40,000 | £32,000 | £24,000 | £20,000 | £16,000 |
| £45,000 | £36,000 | £27,000 | £22,500 | £18,000 |
| £50,000 | £40,000 | £30,000 | £25,000 | £20,000 |
| £60,000 | £48,000 | £36,000 | £30,000 | £24,000 |
Pro rata is a Latin term meaning "in proportion" or "proportionally." In UK employment, it means your salary and benefits are calculated proportionally to the hours you work.
Example: If full-time is 37.5 hours and you work 30 hours, you receive 80% (30÷37.5) of the full-time salary.
Quick Formula:
Pro Rata = (Your Hours ÷ Full Hours) × Full Salary
Request 3 or 4 days per week. Your salary becomes pro rata of your previous full-time pay.
Move to compressed hours or reduced days. Calculate pro rata to understand new salary.
Split a full-time role 50/50 or 60/40. Each person receives pro rata salary accordingly.
Working pro rata? Your statutory minimum holiday is 5.6 weeks per year, calculated proportionally to your hours. Here's how it breaks down for the most common UK working patterns.
| Days per week | Holiday weeks (5.6) | Days holiday entitlement | Including bank holidays |
|---|---|---|---|
| 5 days (full-time) | 5.6 weeks | 28 days | Yes |
| 4 days | 5.6 weeks | 22.4 days | Yes |
| 3 days | 5.6 weeks | 16.8 days | Yes |
| 2.5 days | 5.6 weeks | 14 days | Yes |
| 2 days | 5.6 weeks | 11.2 days | Yes |
| 1 day | 5.6 weeks | 5.6 days | Yes |
Statutory minimum holiday already includes the eight bank holidays. If your pro rata working pattern means you don't normally work on a Monday, you don't get a "free" bank holiday — your employer should adjust your annual entitlement so you're not penalised for working on days that fall outside bank holidays.
The 5.6 weeks is a statutory floor. Your contract may give more — many UK employers offer 25 days plus eight bank holidays for full-time staff, which prorates upward (33 × your fraction).
Source: GOV.UK — Holiday entitlement rights. Last updated for 2026.
If you earn at least £10,000 per year and are between 22 and State Pension age, you'll be auto-enrolled into your employer's workplace pension. For 2026-27:
Your gross salary, not your full-time-equivalent salary, is what counts for the £10,000 trigger. So a £30,000 FTE pro-rated to 3 days (£18,000) is still well above the trigger and you'll be auto-enrolled. But pro-rated to 1 day (£6,000) you fall below — your employer doesn't have to enrol you, although you can opt in.
Pro rata workers in the qualifying band get the same 3% employer contribution applied to qualifying earnings as a full-timer — it's literally proportional, not penalised.
Lenders assess affordability on your actual income, not your full-time equivalent. If you earn £24,000 pro rata (the 4-day-week version of £30,000 FTE), most lenders will multiply £24,000 — not £30,000 — by their income multiple (typically 4 to 4.5×, sometimes up to 5.5× for high earners or specialist lenders).
Three practical points:
Disclaimer: This isn't financial advice. If you're navigating this, talk to a whole-of-market mortgage broker — they'll know which lenders are friendliest to pro rata workers.
Pro rata meaning: In proportion to. For salaries, pro rata means your pay is proportionally adjusted based on your working hours compared to full-time. If you work 4 days instead of 5, you receive 80% (4/5) of the full-time salary. This ensures fair compensation for part-time and flexible workers.
30k pro rata 4 days a week equals £24,000 per year. This is calculated as: £30,000 × (4 days ÷ 5 days) = £30,000 × 0.8 = £24,000. Your monthly gross would be £2,000 and take-home approximately £1,650 after tax and National Insurance (2026-27 rates).
To calculate pro rata salary: (Your Hours ÷ Full-Time Hours) × Full-Time Salary. For days: (Your Days ÷ 5) × Full-Time Salary. Example: 3 days of £40,000 = (3÷5) × £40,000 = £24,000 pro rata. Use our calculator above for instant results.
Pro rata for part-time work means all benefits are proportionally adjusted. If full-time is 28 days holiday, working 3 days (60%) gives you 16.8 days holiday. Pension contributions, sick pay, and other benefits are similarly calculated pro rata to ensure fair treatment.
To work out 30k pro rata: For 4 days = £24,000, for 3 days = £18,000, for 2.5 days = £15,000. Use the formula: £30,000 × (days worked ÷ 5). Our pro rata calculator above does this instantly and shows take-home pay too.
No, salary pro rata gives you a fixed annual amount based on your hours/days worked, while hourly rate means you're paid per hour worked. Pro rata provides salary stability with benefits, while hourly can vary with hours worked.
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