SavingsInvestment
Fixed Deposit Calculator
Estimate FD maturity amount and interest with editable compounding frequency.
● Calculated privately in your browser
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Methodology & Logic
How the Fixed Deposit Calculator works
Estimate FD maturity amount and interest with editable compounding frequency. Below is the exact mathematical or algorithmic model used by this investment utility, along with its key operating assumptions.
Core Formula / Logic
Maturity amount = principal × (1 + annual rate ÷ compounding frequency) ^ (frequency × years).Step-by-step workflow
- Set your starting capital, rate, or tenure in the Fixed Deposit Calculator controls (or pick a quick INR benchmark preset).
- The calculation engine applies Maturity amount = principal × (1 + annual rate ÷ compounding frequency) ^ (frequency × years). on every change and separates principal from compounded gains or interest.
- Inspect the visual chart breakdown and adjust sliders to stress-test lower returns, higher inflation, or extra prepayments.
Practical Walkthrough
Worked example & key advantages
Example Scenario
A ₹1 lakh FD at 7% for 3 years with quarterly compounding estimates a maturity value near ₹1.23 lakh.
Why use this FD tool
- Transparent compounding and amortization math (FD) with Indian Lakh and Crore formatting.
- Side-by-side visual charts showing how tenure, rate resets, or step-ups change lifetime wealth.
- 100% browser-local execution—your loan, investment, and tax figures are never uploaded or stored on a server.
Important Assumptions & Scope
- The interest rate stays fixed for the full tenure.
- Compounding frequency is user-selected.
- TDS and income-tax impact are excluded.
- Bank-specific rounding can vary slightly.
Common Questions
Frequently Asked Questions — FD
Clear answers to common questions about methodology, edge cases, and privacy.
Why can bank maturity values differ?
Banks may use specific days, payout options, rounding and tax withholding rules.
Does this include TDS?
No. It estimates gross maturity before tax deduction.
Can I change compounding?
Yes. Edit the compounding frequency field.