FD Interest Calculator — Maturity, Payout & Comparison
Estimate a fixed deposit’s maturity, work backwards from a savings target, illustrate periodic interest payouts or compare two quoted offers. See the deposit, interest and assumptions behind each result.
A deposit illustration, not a bank quote. Enter the rate and compounding terms your provider quotes. Broken-period interest, payout discounts, tax deductions and early-withdrawal rules can change the amount actually received.
Plan Your Fixed Deposit in Four Ways
Use your quoted rate and tenure. Example rates are not current offers.
Know what your deposit could return
Choose a scenario and calculate to separate the principal from the interest.
Maturity
Project a cumulative FD under your chosen compounding rule.
Target deposit
Find the initial deposit needed for a gross future amount.
Interest payout
Illustrate periodic income without reinvesting the interest.
Offer comparison
Compare two rates and methods over the same tenure.
Your FD illustration
Initial deposit
₹0
Gross interest
₹0
Illustrative tax on interest
₹0
Net total after illustration
₹0
Modelled results, before unmodelled bank charges and withdrawal penalties. Tax is applied only as an illustration to gross interest; actual deduction dates and tax rules are not simulated.
Deposit projection
Years mean rolling 12-month periods, with a final partial year. Amounts are rounded only for display.
Choose the FD cash flow you actually need
An FD quote needs more than an annual rate. Match the payout option and the maturity convention before comparing amounts.
Cumulative deposit
Interest remains in the deposit and grows under the selected compounding convention. Maturity mode projects the amount at the end; Target Deposit divides a gross target by the same growth factor.
Periodic interest income
Payout mode uses simple interest and pays it out rather than adding it to principal. Total receipts include all gross payouts plus the principal returned at maturity. There is no single “maturity balance” containing all prior payouts.
Compare the written terms
Offer A and Offer B use the same deposit and tenure, each with its own rate and frequency. A higher modelled total does not assess institution risk, withdrawal access, deposit protection or eligibility.
Keep tax separate
Enter an assumed percentage only if you want an illustration. Net interest = gross interest × (1 − tax / 100). This does not calculate TDS thresholds, exemptions, refunds, tax slabs or annual deductions.
The calculation, with its boundaries
The tool uses nominal annual rates and whole-month tenure. It does not calculate day-by-day bank interest.
Compound or simple maturity
For deposit P, annual percentage a, frequency k and tenure m months: M = P × (1 + a / (100 × k))^(k × m / 12). Simple interest uses M = P × (1 + a × m / 1200). Fractional compounding periods follow this mathematical formula.
Target and payout calculations
Target deposit = gross target / growth factor, rounded upwards to the nearest paisa. Each payout = P × a × interval months / 1200; any final shortened interval is proportional. A provider may discount monthly payouts or use another convention.
A worked example
₹1,00,000 at 7% nominal annual interest, compounded quarterly for 36 months, gives a modelled gross maturity of ₹1,23,143.93 and interest of ₹23,143.93. At an assumed 20% tax on that interest, the illustrative deduction is ₹4,628.79.
Read the schedule correctly
Cumulative rows show modelled accrual, not confirmed bank postings. Payout rows show cash paid out, the return of principal and running receipts. Yearly groups summarise these monthly rows; interest is not reinvested in payout mode.
Before opening a fixed deposit
Use this checklist when you review the provider’s own application and deposit receipt.
1. Obtain the exact quotation
Confirm the provider, deposit amount, tenure, rate, compounding or payout option, and maturity instructions. Rates shown in this calculator are editable examples, not live offers.
2. Check account and KYC requirements
Providers may ask for identity and address evidence, PAN or applicable tax documentation, funding account details and age evidence for a senior-citizen product. Requirements vary; use the provider’s current list and submit documents only through its authorised channel.
3. Read access and renewal conditions
Check premature-withdrawal penalties, lock-in terms, nomination and automatic renewal. This calculator assumes the full entered tenure; it does not price an early exit or assume today’s rate applies at renewal.
4. Save the deposit confirmation
Check the receipt against your chosen amount, opening date, interest method and nominee details. Reconcile actual interest credits and deductions with the provider’s statement rather than treating this schedule as an account record.
Honest by Design
A useful estimate states what it includes and what needs checking with the provider.
What this tool does
- Calculates cumulative maturity with a chosen compounding rule or simple interest.
- Solves an initial deposit for a gross target.
- Illustrates simple periodic interest payouts and compares two quoted offers.
- Separates principal, gross interest and an optional assumed tax amount.
- Provides monthly and yearly tables, a CSV schedule and a text summary.
What this tool does not do
- Fetch current FD rates, recommend banks or rank institution safety.
- Calculate actual TDS, tax liability, tax relief or deposit protection eligibility.
- Model day counts, payout discounts, bank-specific broken-period rules or early exits.
- Handle recurring deposits, missed deposits, renewals, fees or changing rates.
- Promise that a bank will pay the modelled amount.
Data and model limits
- Inputs are calculated in your browser; this fragment does not send or persist them. The wider site may use analytics; fonts load from Google.
- No account access, document upload or personal identifiers are required.
- The principal is capped at ₹100 crore, tenure at 600 months and nominal annual rate at 100% for numerical safeguards.
- The tax illustration is applied to interest without modelling deduction timing or its compounding effect.
- The quoted rate remains unchanged throughout the entered term.
Provider conventions matter: SBI’s interest calculation guidance explains quarterly term-deposit interest and discounted monthly payouts. Check the terms for your specific product.
FD interest calculator questions
Interpret the output before comparing it with a deposit quote.
Rates and maturity
Is the entered rate a current FD offer?
No. The default is an editable example. Use a written quotation or the provider’s published rate for your amount, customer category and tenure.
Why might the bank’s maturity amount differ?
Day-count conventions, broken-period interest, interest credit dates, tax deduction timing and rounding can differ from this whole-month mathematical model.
Does senior-citizen interest get added automatically?
No. Enter the actual applicable quoted rate. A universal bonus is not assumed.
Tax and payouts
Does the tax percentage calculate TDS?
No. It applies your assumed percentage to gross interest as an illustration. It does not determine withholding requirements or your final tax liability.
What happens with a partial payout interval?
The last interval is shortened to the remaining months and receives proportional simple interest. Your provider’s actual final payment rules may differ.
Are yearly rows calendar or financial years?
Neither. They group successive 12-month periods from the start of the model. They are not a tax-year statement.
Check the numbers against your FD quote
Use the provider’s rate, tenure and interest option, then compare its written maturity or payout terms.