A 7% return during 3% inflation = only 3.88% real return — inflation silently erodes your wealth.
Use the Fisher equation: Real Return = (1 + Nominal) / (1 + Inflation) - 1.
Reach for this tool whenever a financial decision hinges on this type of calculation. Small differences in rate or term become large differences in total cost or return over multi-year horizons — differences that only become visible when you run the actual numbers.
Many financial calculation errors stem from omitting ancillary costs: fees, taxes, insurance, or maintenance. The headline figure (interest rate, monthly payment) is rarely the complete cost of a financial product.
An employee receives a counter-offer from another employer: a £4,000 salary increase but no pension contribution versus the current role's lower salary with 8% employer pension. Running both through the finance calculator shows the true net financial value of each offer.
Your investment return minus inflation. A 7% return with 3% inflation = ~3.88% real return.
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