UK Salary Inflation Calculator
Find the gross salary that would buy the same basket of goods and services in another year. Compare your actual pay change with inflation using the ONS all-items Consumer Prices Index.
Updated 2026-10-15 · 2026/27 HMRC rates
| Your 2025 salary in 2020 pounds | £27,489 |
| Change in real gross salary | -8.4% |
| Below inflation-matching salary | £3,197 |
ONS annual-average CPI, 2015=100. Latest complete year: 2025. These are gross salary comparisons, before tax; they do not recreate historical tax bills or your household's personal inflation rate.
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Key facts
- The comparison uses complete calendar-year averages, from 2009 to 2025.
- Cumulative inflation is calculated from the ratio of CPI indices, not by adding annual percentages.
- Gross purchasing power and after-tax take-home are different comparisons.
Related
Calculate the pay rise needed to match inflation
Inflation-matching salary = original salary × comparison-year CPI ÷ original-year CPI. This changes the units of purchasing power; it does not estimate a tax refund, investment return or future inflation.
For a £30,000 salary in 2020, the ONS annual-average indices are 108.7 in 2020 and 138.4 in 2025. Their ratio is 1.2732. Matching that increase requires approximately £38,197 gross salary in 2025.
A nominal pay rise can still mean a real pay fall
A rise from £30,000 to £35,000 is a larger cash salary, but its 2020 purchasing power is approximately £27,489 after applying the same index ratio. The real change is -8.4%.
The comparison keeps contracted hours constant. A higher annual salary obtained by working more hours does not necessarily mean a better real hourly wage. For a part-time change, compare full-time equivalents or hourly rates before applying the inflation calculation.
Which inflation data is used?
The data is the ONS all-items Consumer Prices Index, series D7BT, with 2015 equal to 100. The stored snapshot was checked on 15 October 2026 against the release dated 16 September 2026. It includes complete annual averages from 2009 through 2025.
Monthly 2026 observations are not a complete calendar-year average. The tool intentionally does not offer a 2026 annual comparison or mix a monthly observation with annual averages. CPI is a national measure; your household’s spending pattern can produce a different personal inflation rate.
| Calendar year | ONS annual-average CPI (2015=100) |
|---|---|
| 2020 | 108.7 |
| 2021 | 111.6 |
| 2022 | 121.7 |
| 2023 | 130.5 |
| 2024 | 133.9 |
| 2025 | 138.4 |
Purchasing power versus take-home pay
These calculations use gross salary. They do not apply historical tax bands, pension contributions, student loans or changes in benefits. A pay rise that matches CPI before tax might produce a smaller percentage increase in spendable income.
Use the pay-rise comparison tool for current after-tax job offers, and this tool for historical gross purchasing power. Keeping those calculations separate makes their assumptions visible. Neither is a forecast of the salary your employer will offer.
Frequently asked questions
Do I add annual inflation percentages together?
No. Price changes compound. Use the ratio of the two index values, or multiply the annual growth factors, rather than adding the rates.
Why is the latest year 2025?
2025 is the latest complete calendar-year average in the checked ONS snapshot. A partial 2026 observation is not an equivalent annual comparison.
Sources
Figures are taken from official government publications and were last reviewed on 2026-10-15.
Reviewed by Kashif Nazir Khan on 2026-10-15 · software engineer and developer with an interest in accounting and taxation