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Savings · Free Calculator

Savings Calculator

Project the future value of your savings account with regular deposits and compound interest. Includes inflation-adjusted (real) value and after-tax modeling.

Savings Growth Calculator

Final Balance

$53,194.39

Total Contributions

$41,000

Total Interest

$12,194

Effective APY

4.59%

Inflation-adjusted (real) value: $41,555.37

Growth Over Time

Final Balance Breakdown

Key Insights

  • Time is your biggest asset

    Over 10 years, your money grows 10.6 times.

  • Interest does the heavy lifting

    22.92% of your final balance comes from interest, not deposits.

  • Compounding frequency matters

    Compounding monthly gives you an effective rate of 4.59% per year.

  • Inflation erodes purchasing power

    In today's money, your final balance is worth $41,555.37.

Year-by-Year Schedule

Calculations update instantly.

How to use the Savings Calculator

Enter your starting balance (or zero if you're starting fresh), the APY your bank quotes, and your typical monthly deposit. Choose a time horizon — 1, 5, 10, or 20+ years. Toggle Advanced options to add inflation, model tax on interest, or simulate annual raises that increase your contributions over time.

The savings cumulative-interest formula

For a savings account with principal P, APY r, monthly deposits PMT, compounded n times per year over t years:

FV = P(1 + r/n)^(nt) + PMT × [((1 + r/n)^(nt) − 1) / (r/n)]

Cumulative interest = FV − P − total deposits. The calculator above performs this computation precisely for any compounding frequency.

Tips to maximize savings interest

  • Use a high-yield savings account. Switching from a 0.4% to a 4.5% APY can multiply your earned interest by 10× over a decade.
  • Automate deposits. Even small consistent deposits dramatically increase your cumulative interest because of the compounding effect on every dollar you add.
  • Increase contributions yearly. Use the step-up rate field to simulate raising your deposits 5% each year — the long-term boost is substantial.
  • Watch the real return. If your APY is below inflation, your purchasing power is actually shrinking. Use the inflation field to see your real (after-inflation) growth.

Savings Calculator — FAQ

How is cumulative interest on a savings account calculated?
Banks typically compound interest daily or monthly and pay it monthly. The cumulative interest is the running sum of all monthly credits. Use this calculator with your APY and contribution schedule to project the exact figure.
What APY should I expect on a savings account?
High-yield savings accounts (HYSA) typically pay 3–5% APY, while traditional savings accounts often pay below 1%. Use the inflation-adjusted view to see whether your real return is positive.
Should I add money monthly or annually?
Adding money monthly compounds slightly more than adding the same total amount once a year — though for typical bank rates the difference is small. Try toggling 'Monthly' vs 'Annually' contributions to see the impact.
Is interest from savings taxable?
In most countries interest is taxable as ordinary income. Use the tax-rate field in advanced options to model after-tax growth. Always check current rules with a tax professional.