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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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 + £1,064 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.
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.
Calculate take-home pay, compare salaries, and plan your finances