High-yield savings calculator
See how monthly deposits and interest could grow your savings.
Your estimate
- Total contributed
- $10,000.00
- Interest earned
- $400.00
Monthly balance growth
Enter valid values to see your projected balance.
- Projected balance
- Total contributed
The gap between the lines is interest earned. The lines overlap when no interest is earned.
View monthly balances as a table
| Month | Contributed | Balance |
|---|
Assumes the same APY throughout and deposits at the end of each month. Excludes fees, taxes, and withdrawals.
How the estimate works
Worked example
Start with $1,000 and add $200 at the end of each month for 12 months at 4% APY.
- Total contributed
- $3,400.00
- Interest earned
- $83.69
- Ending balance
- $3,483.69
How we calculate interest
We convert APY to an equivalent monthly rate. Each month, we apply interest to the current balance and then add the deposit. If your APY changes, try a different rate to see how it affects your estimate.
CFPB explanation of annual percentage yield
Related calculators
How to compare savings scenarios
See what happens if your APY falls
Try the bank’s current APY, then rerun the estimate at a lower rate with the same starting balance and deposits. With $1,000 to start and $200 added at the end of each month for a year, 4% APY gives an estimated $3,483.69. At 3% APY, the estimate is $3,462.82.
Both runs include $3,400 of your own money. The $20.87 difference comes from interest. Each run holds its APY steady for the entire period, which gives you two scenarios to compare when the actual rate can change.
Compare what you’ll earn on the balance you expect to keep
Check for monthly fees, minimum balances, and limits on how much earns the advertised APY. Those terms can matter more than a small rate difference. Enter a monthly deposit you can keep up with and use the graph to see how much of the final balance comes from contributions.