FD Calculator
Estimate fixed deposit maturity and interest using your chosen compounding frequency.
Open for tax, inflation and account-specific timing assumptions.
Fixed deposit growth over tenure
Before tax and inflation. Uses the selected compounding frequency and contribution timing.
View chart data
Fixed deposit maturity, beyond the advertised rate
A cumulative fixed deposit reinvests interest instead of paying it out. Compare maturity values at the same deposit amount and tenure, then consider what remains after your assumed tax and inflation. Enter the applicable rate from your bank; the default is an illustration, not a current offer.
Worked example
Rs 1,00,000 at 10% compounded annually for 24 months grows to Rs 1,21,000 before tax. The Rs 21,000 interest includes Rs 1,000 earned on the first year's interest.
Formula and calculation assumptions
Monthly rate = (1 + nominal annual rate / frequency)^(frequency / 12) - 1Rates in the formula are decimals. Every month, the balance grows at this equivalent rate. The FD model uses a single opening deposit, with no recurring additions or monthly contribution timing. No intermediate rounding is applied. Final displays are rounded to rupees; the monthly CSV retains two decimal places. Tenure is an integer number of months.
Estimated tax equals accumulated interest multiplied by your assumed tax percentage. It is deducted only from the final displayed balance, not from annual accrual. Today's purchasing power divides that net balance by (1 + inflation)^(months / 12). Neither tax input nor inflation default is a statutory rate or a forecast.
FD Calculator: Frequently Asked Questions
Can I add monthly top-ups to an FD in this calculator?
No. The FD model starts with one deposit and does not add monthly top-ups. For regular new deposits, compare the RD calculator; for an initial amount plus additions, use the compound interest calculator. Actual top-up deposit products can have different rules.
How does an FD calculator with inflation show real returns?
The optional inflation adjustment converts the projected net maturity amount into today's purchasing power. A positive rupee interest amount can still correspond to little or negative real growth when inflation and the assumed tax cost are high.
What is a fixed deposit maturity calculator?
It estimates the ending balance of a cumulative deposit from principal, interest rate, term and compounding frequency. Maturity includes both the original deposit and reinvested interest before any modeled tax adjustment.
How is compound interest on an FD calculated?
For principal P, nominal annual rate r, m compounding periods a year and t years, the standard full-period formula is P x (1 + r/m)^(m x t). This calculator uses an equivalent monthly rate for month-based tenures.
What is the difference between FD interest and maturity amount?
Interest is the amount earned above the original deposit. Maturity is principal plus accumulated interest. An estimated tax adjustment reduces the modeled net proceeds, not the original gross interest figure.
More questions (7)
Can I calculate an FD for a term given in months?
Yes. The calculator works with a month-based term. An actual bank deposit may use exact calendar dates and special treatment for incomplete quarters, so its maturity quote can differ from the projection.
Does the FD calculator apply TDS automatically?
No. The optional tax percentage is a simplified assumption applied to accumulated interest. It does not reproduce TDS thresholds, annual withholding, declarations or the depositor's final income-tax liability.
Can this estimate the deposit needed for a maturity target?
Yes. The target calculation finds the initial deposit required under the selected rate, tenure and enabled assumptions. It is a mathematical estimate, not confirmation that a bank offers those terms.
Are premature FD withdrawal penalties included?
No. Premature closure can change the applicable rate and introduce a penalty under the bank's terms. The displayed maturity assumes the modeled deposit remains invested for the full selected period.
Does this calculate monthly interest payouts?
No. This tool models cumulative reinvestment. Non-cumulative monthly payouts may use discounted rates and must be calculated using your bank's product terms.
Why can a bank maturity quote differ?
Banks may use actual dates, broken-period simple interest, different day counts and intermediate rounding. This model uses equivalent monthly accrual, so fractional compounding periods are estimates.
Are senior-citizen rates included?
Enter the rate you are actually eligible for. There is no automatic senior-citizen uplift or live bank-rate feed.