Retirement Calculator for United Kingdom
United Kingdom · GBP. Estimate a spending target adjusted for inflation.
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Calculator Parameters
All amounts in GBP.
£2,500.00 Minimum £0.00; maximum £100,000.00.
25 Minimum 0; maximum 50.
25 Minimum 1; maximum 50.
5% Minimum 0%; maximum 30%.
3% Minimum 0%; maximum 30%.
Your estimate
Estimated retirement fund needed
£1,258,737.37
Monthly spending at retirement
£5,234.44
Years to fund
25
Based on the assumptions shown. This result is an illustration, not a quotation or guaranteed benefit.
Retirement Target Over Time
Method and scope
Today’s monthly spending grows with assumed annual inflation until retirement. The target funds annual spending at the start of each retirement year, using the real return (1 + nominal return) / (1 + inflation) − 1. State pensions, other income, tax, fees and longevity beyond the entered duration are excluded. Returns and inflation are assumptions, not forecasts.
Using this calculator in United Kingdom
This is a spending-based target in GBP, not an entitlement calculation for United Kingdom. It excludes government pension income and other assets. Use the separate local pension calculator for the supported pension model, then consider any income outside this target separately.
Try the starting example
Monthly spending today: £2,500; Years until retirement: 25; Years in retirement: 25; Assumed annual return (nominal): 5%; Assumed annual inflation: 3%.
Estimated retirement fund needed: £1,258,737.37.
Compare one assumption at a time
The assumed return changes the spending target under the model’s real-return calculation. Keep inflation, spending and retirement duration fixed for this comparison. A smaller modelled target at a higher return does not establish that the plan is sustainable under variable actual returns. These fictional scenarios use the starting inputs printed above, not your current entries in the interactive calculator.
| Assumed annual return (nominal) | Estimated retirement fund needed | Interpretation |
|---|---|---|
| 3% | £1,570,333.45 | One changed input |
| 5% | £1,258,737.37 | Starting example |
| 7% | £1,032,052.60 | One changed input |
Are you comparing money available now with money set aside for retirement?
A cash savings goal and a SIPP balance answer different questions. The SIPP model includes basic-rate relief under its stated assumptions, while the savings tool excludes tax and account restrictions. Keep accessible savings separate from a retirement balance when comparing the results.
To reproduce the table, reset the calculator, change only the named input and compare the result and any warning. Record the assumptions with your result. See worked planning examples and our calculation and correction process.
Sources and review date
Rules and method reviewed 2026-11-01. Future changes are not automatically applied. Report a correction.