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See how inflation erodes your purchasing power over time.
Purchasing Power
£368,362.52
Present Value
£290,000.00
Purchasing Power
£228,307.70
Value Lost
£78,362.52
Future Cost
£368,362.52
Estimates only - not financial advice. Verify with a qualified professional before making decisions.
At a CPI of 4.9%, the purchasing power of your £290,000.00 will erode by £78,362.52 over 60 months, settling at £228,307.70. What costs £290,000.00 today will require £368,362.52 then.
💡Total Interest on £290,000.00: £78,362.52
Purchasing Power Loss: £61,692.30
Sample scenarios using current reference rate data.
Source: Bank of England · Updated 2026-05-01
Source: Bank of England · Updated 2026-05-01
Source: Bank of England · Updated 2026-05-01
An inflation calculator shows how the real purchasing power of a sum of money erodes over time at a given inflation rate. It uses the present-value formula in reverse - the same formula central banks use when comparing real wages or real interest rates across years.
Future cost = Present value × (1 + r)^n | Purchasing power = Present value ÷ (1 + r)^nUsing last year's inflation rate as the long-term assumption.
Single-year readings can be volatile. For long-horizon planning, the central bank's stated target (or a slight buffer above it) is a more stable input.
Ignoring 'real return' when comparing investments.
A 5% savings rate in a year of 4% inflation is only a 1% real gain. Always subtract inflation from nominal returns when comparing long-term options.
Reference formula and educational copy. For GB-specific rate data see the source link in the disclaimer block above. This is not financial advice.
Assessing credit availability and savings compound growth in regional UK cities requires matching your budget against standard bank base rates.
Retail financial services are regulated strictly by the Financial Conduct Authority (FCA) to promote secure lending and healthy consumer credit choices.
Monthly payments are calculated to systematically zero the outstanding balance by the end of the specified term.
FV = PV / (1+r)^nCommon questions about using this tool for GB.
Built & maintained by: Dhanasekar · Developer
Formula reference: Bank of England
Data last updated: 1 May 2026
This is a free educational tool, not financial advice.
Important: This calculator provides estimates for informational purposes only and does not constitute financial advice. Actual rates and terms may vary. Always consult a qualified financial advisor before making financial decisions.
See how inflation erodes your purchasing power over time.
Purchasing Power
£368,362.52
Present Value
£290,000.00
Purchasing Power
£228,307.70
Value Lost
£78,362.52
Future Cost
£368,362.52
Estimates only - not financial advice. Verify with a qualified professional before making decisions.
What you could do instead
+47%better
Held as cash
Inflation eats 4.9%/yr - value silently shrinks
Invested @ 8%
Park in equity / index funds at 8% nominal
Original amount
£290,000.00
Original amount
£290,000.00
Future nominal value
£368,362.52
Future nominal value
£426,105.14
Real purchasing power
£228,307.70
Real purchasing power
£335,458.91
+£107,151.21 preserved
In today's money, you'd hold £335,458.91 of real value vs £228,307.70 as cash - 47% more purchasing power.
Pay 10% extra each month
Pay just 10% extra (£251,138/mo) and save £77,015 in interest, becoming debt-free 58 months earlier.
* Based on 10% overpayment applied every month until payoff.
At a CPI of 4.9%, the purchasing power of your £290,000.00 will erode by £78,362.52 over 60 months, settling at £228,307.70. What costs £290,000.00 today will require £368,362.52 then.
💡Total Interest on £290,000.00: £78,362.52
Purchasing Power Loss: £61,692.30