Compound interest calculator

See how compounding frequency affects a savings balance, compare simple and compound interest, and inspect where the growth comes from.

Inputs

Enter a starting balance, annual rate, compounding frequency and term.

Savings details

Compounding and term

How often interest is calculated and added to the balance. Annual means once a year, quarterly every three months, monthly once a month and daily every day. Continuous compounding assumes interest is added constantly. At the same nominal rate, more frequent compounding generally increases the amount earned or owed.

How does interest on interest build over time?

Separate interest earned on the original balance from the additional growth generated by compounding.

Inputs

Choose a starting balance and AER.

Growth assumptions