Inflation impact calculator (UK)
Answer searches like £10,000 in 20 years — see how inflation erodes purchasing power if you hold cash, and how much you'd need in future to match today's spending power.
Your inputs
Bank of England CPI target is 2%. Try 2.5% or 3% for rough long-run scenarios.
Results
What will £10,000 be worth in 20 years?
Purchasing power in 20 years (today's money)
£6,103
Same £10,000 cash — what it buys vs today
To keep the same buying power as £10,000 today
You'd need about £16,386 in 20 years
Future nominal amount with 2.5% annual inflation (illustrative).
Example: £10,000 at 2.5% for 20 years
| Measure | Value |
|---|---|
| Purchasing power of £10,000 cash in 20 years (today's money) | £6,103 |
| Future £ needed to match £10,000 today's spending power | £16,386 |
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Frequently asked questions
What will £10,000 be worth in 20 years UK?
If you hold £10,000 as cash and prices rise every year (inflation), each pound buys less over time. After 20 years at 3% annual inflation, £10,000 still says “£10,000” in your account, but its purchasing power is roughly equivalent to about £5,540 in today’s money. To keep the same buying power as £10,000 today, you’d need about £18,061 in 20 years at that inflation rate. This calculator shows both ideas.
How is purchasing power calculated?
We use the standard formula: real value in today’s money equals nominal amount divided by (1 + inflation rate) raised to the power of years. This assumes a constant annual inflation rate for illustration—actual UK inflation (CPI) varies year to year.
What inflation rate should I use?
The Bank of England’s target is 2% CPI. Long-run UK CPI has often been in the 2–3% range, but there have been higher periods. Use a rate that matches your scenario; 2.5% or 3% are common for rough planning.
Does this include interest on savings?
No. This tool shows what happens to **cash held with no return**. If you earn interest or invest, your nominal balance can grow and offset some or all of inflation—use our compound interest or ISA calculators for that.
Bank of England — Inflation
Current CPI and the 2% target.