Fixed Deposit Calculator: Formula and Examples
Estimate deposit maturity with selectable compounding and an optional tax assumption.
How the calculation works
Tax is modeled once at maturity using your entered percentage. Actual deposit conventions, withholding dates, and tax rules can differ. Premature withdrawal penalties are excluded.
Fixed Deposit formula
Gross maturity = principal × (1 + nominal rate ÷ frequency)^(frequency × years). Net maturity = gross maturity − estimated tax on positive interest.
Worked example
$10,000 at 6% nominal interest compounded quarterly for one year becomes approximately $10,613.64 before tax.
Inputs, assumptions, and interpretation
Amounts and rates apply only to the defined scenario. For projections, returns remain constant and timing follows the selected input. Taxes, market variability, and unentered costs are excluded.
Displayed values are rounded, while calculations use unrounded numbers. The charts show modeled values rather than historical performance. For background, see Investor.gov introduction to investment returns.
Frequently asked questions
Are the default rates guaranteed?
No. Default inputs illustrate how the calculation works. Enter rates and contribution amounts relevant to your scenario, and review the applicable account or scheme terms.
Why might an actual statement differ?
Actual payment dates, compounding conventions, changing returns, fees, tax treatment, and account rules can differ from a simplified projection.
How should I interpret a negative result?
Some comparisons or value changes can be negative, including investment losses or a gap between alternative scenarios. Read the result labels to distinguish a balance from a change in value.