Calculateus

Savings Calculator

Project the growth of your savings account with regular deposits.

Result

Ending Balance
$45,665.77
Total Deposited
$37,000.00
Interest Earned
$8,665.77
BalanceDeposited
$80K$60K$40K$20K$0Balance - Yr 1: $5KBalance - Yr 2: $9KBalance - Yr 3: $13KBalance - Yr 4: $17KBalance - Yr 5: $21KBalance - Yr 6: $26KBalance - Yr 7: $30KBalance - Yr 8: $35KBalance - Yr 9: $40KBalance - Yr 10: $46KDeposited - Yr 1: $5KDeposited - Yr 2: $8KDeposited - Yr 3: $12KDeposited - Yr 4: $15KDeposited - Yr 5: $19KDeposited - Yr 6: $23KDeposited - Yr 7: $26KDeposited - Yr 8: $30KDeposited - Yr 9: $33KDeposited - Yr 10: $37KYr 1Yr 3Yr 5Yr 7Yr 9

About the Savings Calculator

Setting a savings goal is easy; knowing whether your monthly deposit actually gets you there on time is the harder part. Our Savings Calculator projects your account balance forward based on an initial deposit, regular monthly contributions, and an interest rate.

How It Works

The calculator grows your initial deposit and adds your monthly contribution each period, compounding interest on the running balance throughout. The result shows your ending balance, split between what you actually deposited and what you earned in interest.

Formula & Methodology

This uses the same lump-sum-plus-contributions compound growth math as the site's investment and retirement projections, just applied at typical savings-account rates rather than typical market-investment rates. Splitting the final balance into 'total deposited' versus 'interest earned' is what makes the projection actionable - it shows exactly how much of a savings goal is realistic to reach through deposits alone versus how much interest is expected to contribute.

Step-by-Step: Calculating It By Hand

  1. 1Convert the annual interest rate to a monthly rate by dividing by 12.
  2. 2Compound the initial deposit forward using the monthly rate over the total number of months.
  3. 3Add the compounded value of monthly contributions using the annuity growth formula.
  4. 4Subtract total deposits (initial plus all contributions) from the final balance to isolate interest earned.

Examples

Steady saver

$1,000 initial deposit plus $300/month at 4% for 10 years grows to a healthy balance, with a meaningful share coming from interest, not just deposits.

Starting later

The same monthly contribution starting with no initial deposit and a shorter timeframe reaches a noticeably smaller total - showing why starting early matters as much as the amount saved.

Advantages

  • Shows the split between what you deposited and what you earned
  • Makes it easy to test different monthly contribution amounts
  • Uses real compounding, not a rough linear estimate
  • Useful for any savings goal - emergency fund, vacation, a big purchase

Common Mistakes

  • Underestimating how much interest actually contributes over long time horizons
  • Using an unrealistically high interest rate for a standard savings account
  • Not adjusting the plan after a change in monthly contribution ability
  • Forgetting to account for goals with a fixed deadline rather than an open-ended timeframe

Edge Cases to Watch For

  • Standard savings account rates are variable and can change at any time, unlike the fixed rate this projection assumes for the full period.
  • Interest earned in a standard (non-tax-advantaged) savings account is taxable income in the year it's earned, which this pre-tax projection doesn't subtract.
  • A goal with a hard deadline (a wedding, a trip) benefits from working backward - using this same math to solve for the monthly contribution needed rather than projecting forward from a guessed amount.
  • High-yield savings account rates can differ from standard savings accounts by a significant multiple, making the rate you enter the single biggest driver of the projection's outcome.

Common Use Cases

  • Projecting progress toward a specific savings goal
  • Comparing how different monthly contribution amounts change your timeline
  • Choosing between a standard and high-yield savings account based on rate differences
  • General savings planning outside of retirement-specific accounts
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Is this the same math as the Compound Interest Calculator?

Yes, functionally - this one is just framed around a savings goal with deposits rather than general investment growth, showing the same future value projection with monthly contributions.

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Conclusion

A savings goal becomes much more achievable once you can see the real numbers behind it. If your goal is retirement specifically, our Retirement Calculator adds the additional considerations that come with that longer, more specific timeline.

References