ToolPetal
FD calculator
| Breakup | Value |
|---|
Defaults snapshot: principal vs interest (quarterly, 5 years, 7%)
Not investment or tax advice. Ignores TDS, premature withdrawal, senior-citizen rate bumps, and payout vs reinvestment options.
Same deposit, four compounding settings
Banks quote a nominal annual rate, then compound on a schedule. Holding P, R, and tenure fixed while changing only frequency moves maturity. Shared case: Rs 1,00,000 at 7% for 5 years.
| Compounding | n / year | Maturity | Interest |
|---|---|---|---|
| Yearly | 1 | ≈ Rs 1,40,255.17 | ≈ Rs 40,255.17 |
| Half-yearly | 2 | ≈ Rs 1,41,059.88 | ≈ Rs 41,059.88 |
| Quarterly (default) | 4 | ≈ Rs 1,41,477.82 | ≈ Rs 41,477.82 |
| Monthly | 12 | ≈ Rs 1,41,762.53 | ≈ Rs 41,762.53 |
Pick the frequency printed on your FD advice slip. Guessing monthly when the bank compounds quarterly overstates maturity.
Compound FD formula (and the simple toggle)
For compound (reinvested) mode: period rate i = (R/100) / n, periods N = n × t, maturity A = P × (1+i)^N when i is not ~0; otherwise A = P. Interest = A − P.
Simple mode skips frequency entirely: interest = P × (R/100) × t, maturity = P + interest. Some short-tenure products are quoted that way; most multi-year bank FDs are compound. Page default is compound + quarterly.
Tenure unit: Years uses t as entered. Months uses t = months / 12 (so 60 months is 5 years). The unit control does not rewrite the tenure box; 5 years and 5 months are different tenures.
What this page deliberately leaves out
- TDS on interest, Form 15G/15H, and post-tax yield.
- Senior-citizen or special-rate bumps (enter the rate you were offered).
- Premature withdrawal penalties and broken-period interest.
- Interest payout (monthly/quarterly credit) vs cumulative reinvestment; this page models cumulative maturity.
For open-ended compounding with optional regular deposits, use the compound interest calculator. For monthly mutual-fund SIPs, use the SIP calculator. Not investment or tax advice. See the Disclaimer.
FAQ
How is FD maturity calculated?
This page uses compound interest for a lump-sum fixed deposit. Let P be the deposit amount, R the annual rate in percent, n the compounds per year, and t the tenure in years. Period rate i = (R/100) / n. Periods N = n × t. Maturity A = P × (1+i)^N when i is not about 0; otherwise A = P. Interest earned = A − P. Quarterly compounding means n = 4 (common on Indian bank FD pages).
Why does compounding frequency change maturity?
The same nominal annual rate compounds more often when n is higher, so effective yield rises slightly. On identical P, R, and tenure, monthly (n=12) beats quarterly (n=4), which beats half-yearly (n=2), which beats yearly (n=1). Match the frequency your bank states on the FD receipt; guessing wrong moves maturity by thousands on large deposits.
Does this include TDS or premature withdrawal?
No. The calculator ignores TDS on interest, Form 15G/15H, senior-citizen rate bumps, premature-withdrawal penalties, and payout-vs-reinvestment options. It is a browser-only estimate of compound maturity for a held-to-term lump sum.
Is anything uploaded?
No. Deposit amount, rate, tenure, compounding, and the math run in your browser. Nothing is sent to ToolPetal.