What is compound interest?
Compound interest means you earn interest on the original amount and on interest already earned. Over longer periods this can make the final balance grow faster than simple interest.
Calcus.uk
Compound Interest Calculator
Calculate projected savings growth with compound interest, regular contributions, and a yearly balance breakdown.
Estimate how savings or investments can grow when interest compounds and you add regular contributions. This calculator uses monthly compounding and adds contributions at the end of each contribution period.
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FAQ
Can I include regular contributions?
Yes. Enter a regular contribution and choose whether it is added monthly, quarterly, or yearly. Contributions are added after interest for that period.
Does this include tax or fees?
No. This first version estimates gross growth before tax, account fees, inflation, withdrawal rules, or investment risk. Country-specific tax wrappers should be modelled in dedicated calculators.