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Savings Interest Calculator

Estimate how your savings can grow over time using your starting balance, contributions, interest rate and compounding frequency.

Your Details

Overview

This savings interest calculator helps you estimate how much your money could grow over time. Enter your starting deposit, monthly contribution, annual interest rate, savings term and compounding frequency to see your projected balance and total interest earned.

How it works

The calculator estimates growth in two parts: your starting balance and your regular monthly contributions. Your initial deposit grows using compound interest over the full term. Monthly contributions are added using an equivalent monthly growth rate based on your selected compounding frequency. The final balance is the total of both parts, and the interest earned is the difference between the final balance and the amount you contributed.

How to use this calculator

  1. 1Enter your initial deposit.
  2. 2Add the amount you plan to contribute each month.
  3. 3Enter the annual interest rate.
  4. 4Choose how many years you want to save for.
  5. 5Select how often interest is compounded.
  6. 6Review your estimated final balance, total contributions and interest earned.

Example Calculation

Initial Deposit

$5,000

Monthly Contribution

$250

Annual Interest Rate

5%

Savings Term

15

Compounding Frequency

monthly

Estimated Final Balance

N/A

With a $5,000 starting deposit, $250 added each month, 5% annual interest and monthly compounding for 15 years, the estimated final balance is about $74,989. Of that amount, around $50,000 comes from contributions and about $24,989 comes from interest.

Frequently asked questions

What does this savings interest calculator estimate?

It estimates your future savings balance based on your starting amount, regular monthly contributions, interest rate, term and compounding frequency.

Does compounding frequency matter?

Yes. More frequent compounding generally increases the final balance because interest is added to your savings more often.

Are monthly contributions included in the result?

Yes. The calculator includes your regular monthly contributions and estimates how much they may grow over time.

Does this calculator include taxes or account fees?

No. It shows a simplified estimate and does not account for taxes, fees, withdrawal charges or changing interest rates.

Can I use this calculator for any savings account?

You can use it for many savings scenarios, but actual account rules, contribution timing and rate changes may affect your real results.

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Assumptions and warnings

Assumptions

  • Interest is applied at a constant annual rate for the full term.
  • Monthly contributions are added consistently throughout the savings period.
  • Compounding follows the frequency you selected.
  • Results are estimates and do not include taxes, account fees or penalties.

Warnings

  • This calculator provides an estimate only and is not financial advice.
  • Savings rates can change, and actual returns may differ from the results shown.