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Compound Interest Calculator

See how your savings and investments can grow with the power of compounding. Enter your details to get a year-by-year projection of your potential returns.

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Enter Your Details

Your Results

Final Amount

£16,288.95

Total Interest Earned

£6,288.95

Year-by-Year Growth

YearInterest EarnedEnd of Year Balance
1£500.00£10,500.00
2£525.00£11,025.00
3£551.25£11,576.25
4£578.81£12,155.06
5£607.75£12,762.82
6£638.14£13,400.96
7£670.05£14,071.00
8£703.55£14,774.55
9£738.73£15,513.28
10£775.66£16,288.95
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Understanding Compound Interest

Compound interest is the interest you earn on both your initial investment (the principal) and the accumulated interest from previous periods. It is often called 'interest on interest' and is a powerful force for growing wealth over time. The key takeaway is that the longer your money is invested, the more significant the effect of compounding becomes. This Compound Interest Calculator from Calculator Site helps you visualise this growth year by year.

How to use this Calculator Site tool

Enter your initial investment amount, the annual interest rate you expect, and the number of years you plan to save for. Choose how often the interest is compounded (e.g., annually, monthly). The calculator will then show you the final amount and the total interest earned, along with a detailed year-by-year breakdown of your investment's growth.

Important Considerations for UK Savers

Interest rates are variable and can change. The rates used here are for illustrative purposes. In the UK, you have a Personal Savings Allowance (PSA) which allows you to earn a certain amount of interest tax-free. Interest earned in an ISA is always tax-free. For personalised advice, it is best to consult a financial advisor.

Related Tools and Resources

Explore other calculators to help you make informed financial decisions. See how much you need to save for a goal with our Savings Goal Calculator, or compare savings with other growth methods using the Investment Growth Calculator. Planning for retirement? Our Pension Calculator can help. Interest rates are influenced by the Bank of England base rate page.

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