London Weighting Calculator
Free UK calculator — instant, accurate results for london weighting
🏙️ London Weighting Calculator
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London Weighting Calculator
London weighting is a salary supplement paid to employees working in and around London to offset the higher cost of living. This calculator adds the appropriate London weighting to your base salary, accounting for whether you work in Inner London, Outer London, or the London Fringe area.
London weighting varies significantly by employer and sector. NHS, civil service, education, and local government all have their own defined rates, while private sector London allowances range from informal ad-hoc payments to structured zonal supplements.
London Weighting by Sector 2025/26
| Sector | Inner London | Outer London | Fringe |
|---|---|---|---|
| NHS (HCAS) | 20% (min £4,822) | 15% (min £3,898) | 5% (min £1,134) |
| Teachers (STPCD) | £5,000+ | £2,000+ | £1,000+ |
| Civil Service | £3,250-£4,000 | Varies | Varies |
| Local Government | £4,000-£5,000 | £2,000-£3,000 | £500-£1,000 |
Is London Weighting Enough?
ONS data shows London rents average £1,800/month compared to a UK average of £870. That £930/month (£11,160/year) gap exceeds most London weighting payments. However, London also offers higher base salaries, better career progression, and access to a wider job market.
To see whether London weighting is taxable ingcome, read our London weighting tax guide. For teacher-specific London pay scales, try the teacher salary calculator. For your base pro rata salary, use our main calculator.
How to Use the London Weighting Calculator
Using our london weighting calculator is straightforward. Follow these steps to get accurate results for your situation:
- Enter your full-time salary — This is the annual salary for the equivalent full-time role, before any deductions. You'll find this on the job advert or your contract.
- Set the full-time hours — The standard working week for the role. Most UK employers use 37.5 or 40 hours per week.
- Enter your actual hours — Your contracted weekly hours. This is the number you actually work.
- Click Calculate — The london weighting calculator displays your results instantly, with annual, monthly, weekly, daily, and hourly breakdowns.
Worked Example: London Weighting Calculator
A teacher on Main Pay Scale point 3 (£31,350) working in Inner London receives:
- Base salary: £31,350
- Inner London weighting: £5,000
- Total salary: £36,350
- Monthly gross: £3,029
The London weighting rates for 2025/26 are:
| Zone | Annual Allowance | Monthly |
|---|---|---|
| Inner London | £5,000 | £417 |
| Outer London | £3,483 | £290 |
| Fringe | £1,258 | £105 |
Tips for Using This Calculator
- Always use gross salary: Enter the salary before tax and deductions — the london weighting calculator works with gross figures.
- Check your contract: Your employment contract should state your full-time equivalent hours. Common UK standards are 35, 37, 37.5, and 40 hours per week.
- Know your rights: Under the Part-time Workers Regulations 2000, part-time employees must receive the same hourly rate, holiday entitlement (pro rata), and benefits as full-time colleagues.
- Tax personal allowance: For 2025/26, the first £12,570 of earnings is tax-free. If your pro rata salary falls below this, you pay no income tax at all.
- National Insurance: Employee NI is 8% on earnings between £12,570 and £50,270 (2025/26 rates). Check HMRC NI rates for the latest figures.
Pro Rata Holiday Entitlement
Under the Working Time Regulations 1998, all UK workers are entitled to a minimum of 5.6 weeks' paid holiday per year (28 days for full-time). If you work part-time, your entitlement is calculated pro rata based on your actual hours or days worked.
| Days Worked/Week | FTE Ratio | Statutory Days/Year | Bank Holidays (pro rata) |
|---|---|---|---|
| 5 days (full-time) | 1.0 | 28 days | 8 days |
| 4 days/week | 0.8 | 22.4 days | 6.4 days |
| 3 days/week | 0.6 | 16.8 days | 4.8 days |
| 2.5 days/week | 0.5 | 14 days | 4 days |
| 2 days/week | 0.4 | 11.2 days | 3.2 days |
Holiday entitlement is always rounded up — never down — when the result is not a whole number, per ACAS guidance on holiday entitlement. Bank holidays may be included in or added on top of your statutory 28 days, depending on your contract.
All calculations on this page follow ACAS pro rata pay guidelines and are consistent with the UK Employment Rights Act 1996. Tax figures use HMRC 2025/26 rates. The April 2025 National Living Wage of £12.21/hour is applied where relevant.
Related Salary Calculators
Our london weighting calculator is just one of the tools available on ProRataCalculator. You may also find these useful: pro rata calculator, term-time salary calculator, overtime calculator.
Last updated: February 2026. Verified against HMRC 2025/26 tax rates and April 2025 National Living Wage (£12.21/hour).
Frequently Asked Questions
London weighting is an additional payment made to employees working in London to help offset the higher cost of living. It varies by zone — Inner London typically receives the highest amount.
Typical London weighting: Inner London £3,500–£5,000, Outer London £2,000–£3,000, London Fringe £1,000–£1,500. Exact amounts vary by employer and sector.
Yes, London weighting is fully taxable. It is treated as part of your salary and subject to income tax and National Insurance contributions, like any other earnings.
No. London weighting is most common in the public sector (NHS, education, civil service). Private sector employers may offer it but are not legally required to.