A clear compound interest calculator for Canadian saversHandles monthly deposits and every compounding frequency · Updated November 8, 2026
Compound.Interest calculator

Compound interest calculator

Watch small deposits turn into real money.

Enter a starting amount, a monthly deposit and a rate. You'll see the future balance, how much came from you versus interest, and every year in between.

Future balance
$0
Total deposited$0
Interest earned$0
DepositsInterest
YearDepositedInterestBalance

Quick answers

How much will $10,000 grow in 20 years?

At 6% compounded monthly with no further deposits, about $33,100. Add $300 a month and it grows to roughly $172,000, of which $82,000 is your money and the rest is interest.

Does this account for inflation or tax?

No. To estimate real, after-inflation growth, subtract expected inflation from the rate. Growth inside a TFSA isn't taxed; outside registered accounts it usually is.

When are deposits added?

At the end of each month, a common and slightly conservative assumption.