Savings goal calculator help

By FinTools Content updated September 8, 2026

The savings goal calculator finds the fixed monthly deposit needed to reach a target using your starting savings, timeframe, and assumed annual percentage yield (APY).

Enter your assumptions

• Target amount: the final balance you want, greater than $0 and up to $1 billion.
• Starting savings: money already set aside, from $0 to $1 billion.
• Months until goal: a whole number from 1 to 1,200. One month means one month-end deposit.
• Assumed APY: 0% to 100%, held fixed throughout. These bounds are not suggested savings rates.

All amounts are US dollars. Enter numbers without currency symbols or thousands separators. Every field is required; use 0 for no starting savings or no interest. Blank, nonfinite, negative, and out-of-range inputs hide results until corrected. Fractional months are not accepted.

How APY and timing affect the result

APY includes one year of compounding. The calculator converts it to an equivalent monthly rate using (1 + APY / 100)^(1/12) − 1. Dividing APY by 12 would produce a different annual yield. Interest accrues before each month-end deposit; the final deposit earns no interest before the goal.

Why the final balance can exceed the target

The required deposit rounds upward to the next cent. The projected final balance and interest use that rounded deposit for every month. This may leave a small surplus. Interest is calculated without monthly cent rounding and only rounded for display; actual bank rounding may differ. See the complete formula and methodology.

Why the monthly deposit may be $0

If starting savings already cover the target, no new deposits are needed. The result also shows $0 when the assumed growth of existing savings reaches the target within the selected months. That depends on the fixed APY assumption; it does not guarantee a future balance.

Try the emergency-fund and down-payment examples

The emergency-fund example uses a $6,000 target, $1,200 already saved, 12 months, and 0% APY: the remaining $4,800 requires $400 each month. The down-payment example uses a $30,000 target, $5,000 already saved, 36 months, and a hypothetical 4% APY. Both buttons load their assumptions and the worked examples show their full results.

Limits and privacy

This browser-only educational tool saves inputs locally only when you choose and never connects to accounts. Reloading restores a valid scenario in the page address; otherwise it starts with the default example. It uses no live rates and excludes withdrawals, taxes, fees, inflation, and rate changes. It does not recommend a target, account, or financial decision. For details, read the privacy page and terms.

Related calculators

Use the compound interest calculator to start with a known deposit amount, the APY calculator to convert a quoted nominal rate, or the investment calculator to model fees and inflation. Return to all calculator help or the calculator directory.