Calculator

Compound Interest Calculator

Adjust any input and watch what time does to your money. The only variable that matters more than the rate is when you start.

$
$
%
yrs
Final balance
$0
after 30 years
Total contributed
$0
your money in
Interest earned
$0
0% of total
Growth multiple
0x
every $1 became
Balance over time
Amount contributed
Interest earned
Balance at key milestones
Year Balance Contributed Interest
What if you waited 5 years to start?
Same monthly contribution, same return rate, just starting later.
Starting now
$0
after 30 years
Starting in 5 years
$0
after 25 years
Cost of waiting 5 years $0
$
%
$
$
Payoff time at your payment
Payoff time at minimum only
Interest paid at your payment
Interest saved vs. minimum
This mode models a fixed monthly payment paying down a fixed-rate balance (credit card, personal loan, or similar). It does not account for new charges added to the balance.
Ready to start? Read why starting before you feel ready is the most important decision you can make.
Read: Start Investing →

This calculator is for educational purposes only. It uses compound interest math with monthly compounding. The 7% default is based on the historical inflation-adjusted average return of the US stock market and does not guarantee future results. Investment values can go up or down. This is not financial advice. Consult a licensed financial advisor before making investment decisions.