Part-Time Salary Calculator
Use this UK part-time salary calculator to estimate part-time annual, monthly, weekly and hourly equivalent gross pay. Part-time salary = full-time salary × part-time hours ÷ full-time hours. Gross figures only — no tax or NI deductions.
UK part-time salary calculator. Enter the full-time annual salary and the part-time weekly hours you are considering to see the proportional annual, monthly, weekly and hourly equivalent gross pay.
Note: Gross figures only — Income Tax, National Insurance and pension contributions are not deducted.
More Income and work calculators · All calculators · All guides
What this calculator does
Returns part-time annual salary, monthly gross, weekly gross, hourly equivalent and percentage of full-time hours from a full-time salary plus full-time and part-time weekly hours.
Who it is for
UK employees switching to part-time, returners after parental leave, students balancing study with work, retirees stepping down hours and HR teams pricing reduced-hours offers.
How to use it
Enter the full-time annual salary, the full-time weekly hours and your part-time weekly hours. Results update instantly.
How the calculation works
Part-time annual = full-time salary × part-time hours ÷ full-time hours. Monthly = annual ÷ 12. Weekly = annual ÷ 52. Hourly equivalent = annual ÷ (part-time hours × 52). Percentage of full-time = part-time hours ÷ full-time hours × 100.
Worked example
£30,000 full-time, 37.5 full-time hours, 22.5 part-time hours. Part-time annual = £18,000. Monthly = £1,500. Weekly ≈ £346.15. Hourly equivalent ≈ £15.38. Percentage of full-time = 60.0%.
Assumptions and limitations
- Gross pay only — no Income Tax, NI or pension deductions
- Assumes the same weekly hours every working week of the year
- Hourly equivalent uses annual ÷ (weekly hours × 52)
- Does not include bonuses, overtime, allowances or salary sacrifice
Frequently asked questions
How is part-time salary calculated?
Multiply the full-time salary by your part-time hours and divide by the full-time hours. £30,000 × 22.5 ÷ 37.5 = £18,000.
Is the hourly equivalent the same as my contracted rate?
It's a comparison figure. Your contractual hourly rate may differ slightly because of paid breaks, holiday pay calculation methods and rounding.
Are tax and National Insurance included?
No — the figures are gross. Use a take-home calculator for net pay.
Related calculators
- Car Salary Sacrifice Calculator — Car salary sacrifice gives up salary in exchange for a company car. You save Income Tax and NI on the sacrifice but pay BIK on the company c
- Day Rate Calculator — Enter your annual salary, hourly rate, or target income to calculate your equivalent day rate — or convert a day rate back to an annual figu
- EV Salary Sacrifice Calculator — EV salary sacrifice is highly tax-efficient because the EV Benefit in Kind percentage is just 4% for 2026/27. Income Tax + NI savings on the
- Full-Time Equivalent Salary Calculator — Use this full-time equivalent salary calculator to scale a part-time salary up to its full-time equivalent (FTE). FTE = part-time salary × f
- Holiday Accrual Calculator — Enter your annual entitlement and leave year dates to see how many days you have accrued so far and how many remain.
- Holiday Entitlement Calculator — Full-time UK workers are entitled to at least 28 days (5.6 weeks) of paid holiday per year including bank holidays. Part-time and irregular
Related guides
- How to Calculate Your Freelance Day Rate — A practical guide to setting your day rate as a freelancer or contractor, including salary equivalence and market benchmarks.
- How Overtime Pay Works in the UK — Understand your overtime pay rights, how it is taxed, and how different multipliers affect your earnings.
- How Holiday Accrual Is Calculated in the UK — Learn how holiday builds up over a leave year and how to check how much you have accrued so far.
- Inside IR35 Explained: What UK Contractors Need to Know — A clear guide to working inside IR35, how it affects your take-home pay, and what it means for your contract.
- How Holiday Entitlement Works in the UK — A practical guide to understanding your statutory holiday entitlement as a UK worker, covering full-time, part-time, and irregular working patterns.
- Outside IR35 Explained for UK Contractors — What outside IR35 means, how it affects your take-home pay, and the key differences between inside and outside IR35.
Sources and references
GOV.UK: PAYE pay-period guidance. ACAS: Reduced-hours and part-time working guidance. General reference — not legal or tax advice.
Last updated
Last reviewed: 2026-05-20.