Compound Interest Calculator

Project future balance, total contributions, and investment growth from regular deposits and compound returns.

Adjust your numbers

Starting balance

How much you already have saved or invested right now.

Contribution amount

How much you plan to add each time you contribute.

Contribution frequencydeposits

Choose how often new money is added to the account.

Expected annual return%

Use a conservative long-term estimate when comparing savings or investing scenarios.

Time horizonyears

How long the money stays invested before you need it.

Compound frequencygrowth

This controls how often interest is added back into the balance.

Calculations update as you type.

This is a projection tool, so actual account performance will vary from any assumed return or timing pattern.

Try changing the contribution pace and time horizon first. Those usually move the outcome more than small rate tweaks.