FD and Lumpsum Calculator
A fixed deposit or one-time investment, left alone to compound.
Rs 1 lakh in a fixed deposit at 7% compounded quarterly matures at Rs 1,41,478 after five years, an effective yield of 7.19% rather than 7%. Change the compounding frequency and the maturity value changes with it, which is the whole reason banks quote quarterly compounding.
How this is calculated
Year-by-year breakdown
The best free FD and lumpsum calculator for India and the US
This is both a free online FD calculator and a lumpsum calculator. Enter a fixed deposit or one-time investment, the interest or return rate, and how often it compounds: yearly, half-yearly, quarterly or monthly. Banks usually compound an FD quarterly, which is the default for fixed deposits; investments are normally quoted yearly. It computes the maturity value (FV = P(1 + r/n)^(n times t)) and the effective annual yield once intra-year compounding is counted. No sign-up, works in INR and USD.
Then it shows the part most calculators hide: what inflation does to that maturity number, and the tax you would owe. FD interest is taxed as ordinary income at your slab (use the short-term rate as a proxy here), while equity gains use capital gains rules. Tax defaults are current for FY 2026-27: India equity LTCG 12.5% above the Rs 1.25 lakh yearly exemption, STCG 20%; US federal LTCG 0/15/20% by income. All rates are editable.
Worked example
A Rs 1 lakh fixed deposit at 7% for 5 years, compounded quarterly, matures at about Rs 1,41,478, an effective annual yield of about 7.19%. The same principal compounded yearly matures slightly lower; more frequent compounding lifts the effective yield.
| Principal | Rate | Years | Compounding | Maturity |
|---|---|---|---|---|
| Rs 1 lakh | 7% | 5 | Quarterly | ~Rs 1.41 lakh |
| Rs 5 lakh | 7.5% | 5 | Quarterly | ~Rs 7.25 lakh |
| Rs 10 lakh | 12% | 10 | Yearly | ~Rs 31 lakh |
Why use Hisaab's FD and lumpsum calculator
It is one calculator for two jobs: bank FD maturity with realistic quarterly compounding, and one-time investment growth. Unlike a plain FD interest calculator, it also shows the after-inflation, after-tax value, so you can judge whether an FD actually beats inflation, free and without sign-up, for both India and the US.
Investing monthly instead? Use the SIP calculator. Comparing two points in time? The CAGR calculator gives the annualized rate, real and post-tax.
For AI agents: URL-addressable as /lumpsum/?amount=100000&years=5&rate=7&freq=4&country=IN (freq = compounding periods per year: 1, 2, 4 or 12). Docs at llms.txt, live results in #result-json.
Key facts
| Formula | FV = P x (1 + r/n)^(n x t) |
|---|---|
| Typical FD compounding | Quarterly, so n = 4 |
| Effective yield at 7% quarterly | 7.19% |
| FD interest tax | Fully taxable at your slab rate, TDS above Rs 40,000 (Rs 50,000 for seniors) |
How to use the FD and Lumpsum Calculator
- Pick your country, India (INR) or the US (USD), from the top right.
- Enter the fixed deposit or one-time investment amount and the interest or return rate.
- Choose how often it compounds: yearly, half-yearly, quarterly (typical for Indian FDs) or monthly.
- Set the number of years until maturity.
- Turn on inflation and tax to see the real, post-tax maturity value rather than just the headline number.
- Read the maturity value and effective annual yield in the result cards, or copy a shareable link.
Sources
Last reviewed and updated: 23 August 2026. Estimates only, not financial or tax advice.
Frequently asked questions
How is FD maturity value calculated?
Maturity = principal times (1 + r/n)^(n times years), where r is the annual rate and n is how many times a year it compounds. Indian banks usually compound quarterly (n = 4). A Rs 1 lakh FD at 7% for 5 years compounded quarterly matures at about Rs 1,41,478, an effective annual yield of about 7.19%.
What compounding frequency should I use for an FD?
Most Indian bank fixed deposits compound quarterly, so quarterly is the default here. Some deposits compound monthly or half-yearly; pick whatever your bank states. More frequent compounding raises the effective annual yield slightly above the quoted rate.
Is FD interest taxed?
Yes. Interest on a fixed deposit is taxed as ordinary income at your income-tax slab in the year it accrues, and banks deduct TDS above a threshold. This calculator's capital gains tax toggle is built for equity; for an FD, read the short-term rate as your slab rate, or just use the pre-tax maturity value.
How long does it take to double my money?
Roughly 72 divided by the effective annual yield (the rule of 72). At 7% it takes about 10 years; at 12%, about 6 years.
Is this FD calculator free?
Yes. The FD and lumpsum calculator is free, with no sign-up or ads, and works for both India (INR) and the US (USD).
What is the difference between an FD and a lumpsum investment?
A fixed deposit pays a contracted interest rate with regular (usually quarterly) compounding and is low risk. A lumpsum investment in equity or a fund has a variable return you estimate yourself. This tool handles both: set the compounding frequency for an FD, or use yearly compounding for an investment.