Compound Interest Inflation Adjustment Calculator
Use this calculator to estimate the future value of your investment over time, adjusting for inflation. Include optional, annual contributions to see how regular deposits affect your nominal and real returns.
Tip! - You can leave annual contributions at 0, or mutiply up your regular contributions to get your annual amount.
| Initial Investment (£) | |
|---|---|
| Annual Interest Rate (%) | |
| Years | |
| Inflation Rate (%) | |
| Annual Contribution (£) |
How to Use the Calculator
Enter your initial investment, expected annual interest rate, investment period in years, expected inflation rate, and optional annual contributions. Click Calculate to view nominal and inflation-adjusted future values and total % gains.
Understanding Inflation-Adjusted Returns
Inflation erodes purchasing power over time. Even if your nominal investment grows, its real value may be less impressive. This calculator shows both nominal growth and inflation-adjusted value to give a clear picture of true returns.
Choosing an Inflation Number
Inflation varies over time and no single figure is guaranteed. Many long-term financial projections use an average assumption of around 2–3% per year, roughly in line with typical central bank targets. However, actual inflation can be higher or lower depending on economic conditions, so it’s useful to test different scenarios to see how your investment outcomes could change.
Tips for Investors
Regular contributions increase your final investment value substantially. Compare scenarios with different contribution amounts to plan for long-term financial goals. For a more detailed guide, see Compound Interest & Inflation Guide.
Related Guides
- Compound Interest and Inflation Guide - Understand compounding, inflation impact, and long-term wealth growth strategies.
- Mortgage vs Investing - Compare paying down your mortgage versus investing to optimize financial growth.
Frequently Asked Questions
Can I see both nominal and inflation-adjusted growth?
Yes, the calculator displays both future values along with total % gain relative to total invested capital.
How do contributions affect results?
Adding annual contributions significantly increases both nominal and real investment value, especially over long periods.
Why should I consider inflation?
Nominal growth alone can be misleading; adjusting for inflation shows the real purchasing power of your future wealth.
Is this calculator suitable for planning retirement?
Yes, it helps investors estimate how savings grow over time accounting for interest, contributions, and inflation.