Savings Calculator
Project savings growth from a starting balance, contributions, and an interest rate over time. Use it to compare scenarios and understand the split between contributions and interest earned.
Inputs
$
$
%
Results
Ending balance
$14,495.79
Total contributions$13,000.00
Interest earned$1,495.79
Assumes regular monthly contributions and a constant rate.
Year-by-year
| Year | Balance | Contributions | Interest |
|---|---|---|---|
| 1 | $3,491.69 | $3,400.00 | $91.69 |
| 2 | $6,083.04 | $5,800.00 | $283.04 |
| 3 | $8,778.05 | $8,200.00 | $578.05 |
| 4 | $11,580.87 | $10,600.00 | $980.87 |
| 5 | $14,495.79 | $13,000.00 | $1,495.79 |
5 rows (years). Amounts are estimates and may differ from bank interest calculations.
How to use it
- Enter a starting balance and contribution amount (monthly, by default).
- Enter an annual interest rate (APY or expected return).
- Enter the time horizon (years).
- Review ending balance, total contributions, and interest earned.
Key formulas
- Growth with contributions (simulation)
- Balance grows each period by (1 + r) and adds contributions; projections assume a constant rate and contribution schedule.
FAQ
APY reflects compounding over a year, while a nominal interest rate may not. This calculator uses an annual rate to derive a periodic rate for projections.
This tool assumes a regular contribution each period (e.g., monthly). Contributing earlier generally increases growth compared to contributing later.
No. Interest may be taxable depending on account type and jurisdiction. For after-tax estimates, reduce the rate or subtract expected taxes.
Rates can change in real accounts. Use multiple scenarios to bracket outcomes or rerun the calculator when rates change.
Yes—set recurring contribution to 0 and use the starting balance as your deposit amount.
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Disclaimer
Estimates only. Actual account returns depend on compounding, rate changes, fees, and taxes. Confirm with your bank or account provider.