Comparing pure compounding assumptions
Use the result as a check within this type of task, with the assumptions shown above.
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FD Calculator
Estimate fixed-deposit maturity and interest from principal, annual rate, tenure and compounding frequency.
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Formula and working
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Inputs
Results
14,147.782 maturity value
Principal: 10,000
Estimated compound interest: 4,147.782
Nominal annual rate: 7%
Compounds/year: 4
Effective annual yield from this model: 7.1859031%
Show the working
- 1. Periodic rate = 7% ÷ 4 = 1.75%.
- 2. Number of periods = 5 × 4 = 20.
- 3. A = 10,000 × (1 + 0.0175)^20 = 14,147.782.
- 4. Interest = 14,147.782 − 10,000 = 4,147.782.
This is a mathematical compounding model, not a bank quote. Banks may use product-specific day counts, payout frequencies, rounding, premature-withdrawal terms and tax treatment.
Match compounds/year to the deposit terms rather than assuming quarterly or monthly compounding.
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How to use this calculator
Estimate a fixed principal under a stated nominal annual rate, tenure and compounding frequency. The calculator also shows the mathematical effective annual yield implied by that compounding choice. It is a compounding model, not a quote for any particular bank product.
Step-by-step
- Step 1
Enter principal, nominal annual rate and tenure.
- Step 2
Enter the number of compounding periods per year exactly as required by the deposit terms.
- Step 3
Compare maturity value, estimated compound interest and effective annual yield, then verify the real institution’s day-count, payout, tax and premature-withdrawal rules.
How the result is calculated
Maturity = principal × (1 + annual rate / compounds per year)^(compounds per year × years).
Where this calculator is useful
Checking maturity arithmetic from stated deposit terms
Use the result as a check within this type of task, with the assumptions shown above.
Understanding how compounding frequency changes effective annual yield
Use the result as a check within this type of task, with the assumptions shown above.
Common questions
Why does compounding frequency matter?
With the same nominal annual rate, adding interest to principal more often changes the effective annual yield and therefore the maturity value.
Does every bank calculate FD interest with this exact formula?
Not necessarily. Deposit institutions can use product-specific interest calculation, payout frequency, day-count, rounding and premature-withdrawal rules. Use the bank’s disclosed method for an actual deposit.
What is effective annual yield here?
It is the one-year compounded return implied by the entered nominal rate and compounding frequency: [(1+r/n)^n − 1] × 100.
Need a different calculation?
Use the calculator library to switch tasks when the question, unit or assumption changes.
Browse all calculatorsCommon fixed-deposit questions
FD maturity estimatefixed-deposit interestcompounding frequencydeposit maturity value
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