Monthly compounding

Monthly Compound Interest Calculator

Use the main calculator with monthly compounding when deposits happen every month and the account credits interest monthly.

Best for

Savings accounts, contribution plans, and spreadsheet checks where the monthly deposit is the same each month.

monthlyRate = annualRate / 12

balance = balance * (1 + monthlyRate) + monthlyDeposit

This simple version assumes deposits are made at month end. For a full chart, use the homepage calculator and select monthly compounding.

Open calculator