What this savings calculator does
The calculator solves the equal recurring deposit needed to reach a savings goal by the entered deadline. It also projects an optional planned deposit so you can see an estimated surplus or shortfall.
For a general future-value projection with nominal compounding choices and growing contributions, use the Compound Interest Calculator. For longer-term planning, compare the Retirement Calculator and 401(k) Calculator.
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For optional supporting equipment or reference material, you can browse Financial calculators (paid link) on Amazon.com. An optional separate device for checking financial arithmetic. Confirm it supports the functions you need; it does not replace current records or professional advice. No purchase is required to use this calculator.
How APY is used
Federal Regulation DD defines annual percentage yield as a rate reflecting the total interest paid based on the interest rate and compounding frequency for a 365-day period. This calculator converts APY into the equivalent rate for the selected deposit frequency.
Required deposit formula
The future value of current savings is subtracted from the goal. The remaining amount is divided by the future-value annuity factor. Beginning-of-period deposits receive one additional period of growth.
Because real savings accounts may use daily balance methods and actual transaction dates, use the result as a plan and compare it with the institution's account disclosures.
Monthly, biweekly and weekly saving
The selected frequency changes both the deposit count and the periodic rate. Weekly and biweekly schedule dates are approximate equal-year intervals; actual payroll and bank posting dates follow the calendar.
Important limitations
- APY is assumed constant for the full term.
- Fees, withdrawals, taxes, tiered rates and bonuses are not modeled.
- Deposit counts are rounded to the nearest whole period for partial years.
- Results do not verify account insurance, eligibility or withdrawal restrictions.
Worked example: Savings
Enter the following values in the Savings Calculator and calculate to reproduce this result. Dates below use year-month-day order. This is an illustrative scenario, not a personalized recommendation or a current quote.
- Current savings: 5000
- Savings goal: 25000
- Planned recurring deposit: 200
- Annual percentage yield (APY): 4.25
- Time to goal — years: 5
- Additional months: 0
- Deposit frequency: Monthly
- Deposit timing: End of period
- First deposit date: 2026-10-15
Example result: $283.00required monthly deposit. Your entered monthly deposit projects to $19,474, $5,526 below the goal.
How to interpret this example
The required deposit and the projection from your planned deposit answer different questions. A planned amount below the required amount can leave a gap even with positive interest. Keep deposit timing and frequency consistent when comparing scenarios.