Financial calculators

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Savings & interest Interest calculator

Interest calculator

See what a deposit earns with simple or compound interest — before and after tax.

Your marginal rate on interest income. Use 0 for tax-advantaged accounts.
Balance after tax $11,964 $1,964 interest after tax · 19.64% net return
Gross interest $2,518
Estimated tax $554
Balance before tax $12,518
Effective annual yield (APY) 4.59%

Compounding earns you $268 more than simple interest over this term.

Balance over time Year 5 · Balance $12,518 · Interest $2,518 ($1,964 after tax)
Deposit Interest after tax Tax

Year-by-year breakdown

Year Balance Interest Tax After tax
1 $10,459 $459 $101 $10,358
2 $10,940 $940 $207 $10,733
3 $11,442 $1,442 $317 $11,125
4 $11,968 $1,968 $433 $11,535
5 $12,518 $2,518 $554 $11,964

How it’s calculated

Balance = P × (1 + r/n)^(n × t), where P is your deposit, r the annual rate, n the compounding periods per year and t the term in years. Interest after tax = (Balance − P) × (1 − tax rate). APY = (1 + r/n)^n − 1.

Assumes a fixed rate and that tax is applied to the total interest earned. In many countries interest is taxed every year, so your actual after-tax result may differ. Estimates only — not financial advice.

Frequently asked questions

Yes. Every calculator is free to use, with no account, sign-up or email required.