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Tool · Money & Finance

Compound Interest Calculator

See how savings grow with compound interest, year by year, compared with simple interest.

Year-by-year balance
YearCompoundSimpleDifference

How it works

With compound interest, each period's interest is added to the balance and itself earns interest next time. Simple interest is only ever paid on the original amount, which is why the gap between the two columns widens every year.

This tool is for learning and illustration only. It is not financial advice, and real savings products may include fees, tax and variable rates.