Compound Interest Calculator India 2026

Calculate how your money grows with compounding — add monthly SIP contributions, compare FD vs PPF vs Mutual Fund, and see inflation-adjusted real value. The only Indian compound interest calculator that handles monthly contributions correctly.

Quick Presets

Tap to load typical Indian return rates

Your Investment Details

Principal Amount (Lumpsum)

₹

₹0 (SIP only)₹1 Cr

Monthly SIP/RD Amount

₹

₹0 (no monthly)₹1 L/mo

Annual Return %

1%40%

Time Period

years

1 year50 years

Compounding Frequency

Adjust for inflation (6% p.a.)

Future Value

₹14.72 L

₹14,72,280

Total Invested

₹7.00 L

Wealth Gained

₹7.72 L

Your money multiplied2.10x

Growth Over Time

Invested

Wealth Gained

Year-by-Year Breakdown

See exactly how your wealth compounds each year

Year	Invested	Interest Earned	Balance
Year 1	₹1,60,000	₹16,047	₹1,76,047
Year 2	₹2,20,000	₹41,656	₹2,61,656
Year 3	₹2,80,000	₹78,031	₹3,58,031
Year 4	₹3,40,000	₹1,26,526	₹4,66,526
Year 5	₹4,00,000	₹1,88,666	₹5,88,666
Year 6	₹4,60,000	₹2,66,167	₹7,26,167
Year 7	₹5,20,000	₹3,60,963	₹8,80,963
Year 8	₹5,80,000	₹4,75,229	₹10,55,229
Year 9	₹6,40,000	₹6,11,415	₹12,51,415
Year 10	₹7,00,000	₹7,72,280	₹14,72,280

Where Should You Park This Money?

Same inputs, different Indian investment vehicles — see the real 2026 comparison.

Bank FD6.5% p.a.

₹10.37 L

+ ₹3.37 L gained

PPF7.1% p.a.

₹10.74 L

+ ₹3.74 L gained

Mutual Fund (Avg)12% p.a.

₹14.72 L

+ ₹7.72 L gained

Index Fund14% p.a.

₹16.81 L

+ ₹9.81 L gained

Historical averages only. Mutual fund returns are not guaranteed. FD/PPF rates revised periodically.

What is Compound Interest? India-Focused Plain English Explanation

Compound interest earns interest on interest. Standard formula A = P(1 + r/n)^(nt) where P=principal, r=annual rate, n=compounding frequency, t=years.

Year	Balance	Interest Earned That Year	Interest on Previous Interest
0	₹1,00,000	—	—
1	₹1,10,000	₹10,000	₹0
2	₹1,21,000	₹11,000	₹1,000
3	₹1,33,100	₹12,100	₹2,100
5	₹1,61,051	₹14,641	₹4,641
10	₹2,59,374	₹23,579	₹13,579

Note: By Year 10, nearly 58% of each year's interest is itself interest on previous interest — this is the compounding snowball that Einstein reportedly called the 8th wonder of the world.

Why Most Indian Compound Interest Calculators Are Wrong

Most Indian calculators (including some on major platforms) only handle lumpsum. But 90%+ of retail Indian investors invest via SIP — monthly contributions. When you add monthly SIP, the formula changes significantly. Each month's contribution starts compounding from that month. This calculator uses the correct approach: lumpsum compounds at the chosen frequency, SIP contributions compound monthly at the equivalent monthly rate. Use the calculator above with principal=0 and monthly SIP amount to see your real SIP compounding.

₹10,000 lumpsum only at 12% for 10 years:₹31,058

₹1,000/month SIP (same total ₹1.2L invested) at 12% for 10 years:₹23,004

₹10,000 lumpsum + ₹1,000/month at 12% for 10 years:₹54,062

Compound Interest Comparison — FD vs PPF vs Mutual Fund vs Index Fund

Investment	Rate	Compounding	₹1L lumpsum (10yr)	₹5K/month SIP (10yr)	Tax treatment	Safety
Bank FD	6.5-7.5%	Quarterly	₹1.90L	₹8.72L	Slab rate TDS	DICGC ₹5L
PPF	7.1%	Yearly	₹2.00L	₹8.99L	Tax-free EEE	Govt guaranteed
Mutual Fund	10-14%	Yearly (NAV)	₹2.59-₹3.71L	₹10.35-₹13.27L	12.5% LTCG above ₹1.25L	Market risk
Index Fund	11-14%	Yearly (NAV)	₹2.84-₹3.71L	₹11.28-₹13.27L	12.5% LTCG above ₹1.25L	Market risk

All figures illustrative at historical average rates. Actual returns vary. Tax treatment as of FY 2026-27.

The Power of Starting Early — Why 5 Years Makes a ₹1 Crore Difference

Start Age	Monthly SIP	Duration	Total Invested	Final Corpus at 60	Wealth Gained
25	₹5,000	35 years	₹21L	₹3.24 Cr	₹3.03 Cr
30	₹5,000	30 years	₹18L	₹1.76 Cr	₹1.58 Cr
35	₹5,000	25 years	₹15L	₹94.9L	₹79.9L
40	₹5,000	20 years	₹12L	₹49.9L	₹37.9L

Starting at 25 vs 35 — same ₹5,000/month, same 12% return — creates ₹2.29 CRORE more wealth. That's the price of waiting 10 years.

Monu's Compounding Reality — My Numbers After 14 Months

Started ₹2,000/month SIP February 2025. At 12% average return, after 14 months: total invested ₹28,000, current corpus approximately ₹30,836.

The compounding is invisible at this stage — ₹2,836 in gains after 14 months looks unimpressive. But running the same ₹2,000/month through this calculator at 12% for 35 years shows a corpus of ₹1.29 crore. On ₹8.4 lakh total investment. That 15x multiplier doesn't come from the first 14 months — it comes from compounding accelerating in years 20-35. The early years are about habit formation, not visible wealth creation.

I also keep ₹50,000 in SBI FD at 6.8% for emergency fund — quarterly compounding gives me ₹3,591 interest per year, completely accessible within a week if needed. Two different compounding instruments for two different goals. Use the FD & RD calculator and the SIP calculator together to model your own split. Not financial advice — just my real allocation.

If you are in debt, pay that off first — high-interest debt is negative compounding. Credit card at 36% undoes any 12% investment return and then some. But the moment you are free, start even with ₹500/month. Time in the market crushes timing the market.

Read about my current portfolio in Best Mutual Funds 2026 for Beginners — My Real Portfolio Results

5 Common Mistakes Indians Make With Compound Interest

Waiting until income is "enough": ₹500/month at 25 beats ₹5,000/month at 40. Start with whatever you have now.
Ignoring inflation: A 6% FD in India barely preserves purchasing power. You are not building wealth, you are treading water.
Stopping SIPs during market crashes: This is when compounding accelerates — you are buying units cheaper. Keep the auto-debit on.
Chasing past returns: A small-cap fund that did 28% last year will not keep doing 28%. Plan with conservative 12% assumptions.
Not factoring tax: Post-tax returns matter more than gross returns. An 8% FD for a 30% tax slab investor is really 5.6% after tax.

Frequently Asked Questions

What is compound interest in simple words?

Compound interest is the interest you earn on both your original money AND the interest you have already earned in previous periods. In simple words: your interest also earns interest. If you invest ₹1,00,000 at 10% for 3 years, Year 1 you earn ₹10,000. Year 2 you earn ₹11,000 (10% on ₹1,10,000). Year 3 you earn ₹12,100. The longer you stay invested, the more dramatic this effect becomes. This is why Einstein called it the 8th wonder of the world.

What is the formula for compound interest in India?

The standard compound interest formula is A = P(1 + r/n)^(nt). A is the final amount, P is the principal, r is the annual rate as a decimal, n is the compounding frequency per year (1 for yearly, 4 for quarterly, 12 for monthly), and t is the time in years. For investments with monthly contributions (like SIP), a modified formula is needed — which is exactly why most online Indian calculators fail. Our calculator handles both lumpsum and monthly contributions correctly.

How much will ₹5,000 per month SIP become in 20 years?

At an average mutual fund return of 12% per year, a ₹5,000 monthly SIP over 20 years grows to approximately ₹49.95 lakh. You would have invested ₹12 lakh of your own money, and compounding would have added ₹37.95 lakh. This is why starting SIPs early — even with small amounts — is the single most powerful wealth-building tool for Indians. Use the calculator above to try different numbers.

Is FD or Mutual Fund better for compound interest in India 2026?

For long-term goals (7+ years), mutual funds historically deliver 10-14% returns versus FDs at 6-7.5%. A ₹1 lakh lumpsum in a bank FD at 6.5% for 20 years becomes approximately ₹3.63 lakh. The same amount in a mutual fund at 12% becomes approximately ₹9.65 lakh — nearly 2.7 times more. However, FDs are guaranteed by DICGC up to ₹5 lakh per bank, while mutual fund returns are not guaranteed. For emergency funds, FD wins. For long-term wealth building, mutual funds win.

Does compounding frequency matter a lot?

It matters, but less than most people think. ₹1 lakh at 10% for 10 years: Yearly compounding = ₹2,59,374. Monthly compounding = ₹2,70,704. Daily compounding = ₹2,71,791. The difference between yearly and daily is about 4.8% of the final amount. Far more important than frequency: the rate itself, the duration, and how early you start. Banks sometimes market daily compounding aggressively — useful to know, but not a game-changer compared to picking a higher-return investment.

How does inflation affect compound interest in India?

Indian inflation averages 5-7% per year. A 6% FD return feels safe but barely beats inflation — your real wealth grows almost 0%. Mutual funds returning 12% deliver a real return of approximately 5.7% after 6% inflation. This is why the calculator has an inflation-adjusted toggle: ₹1 crore in 20 years looks like a lot, but in today's rupees it is only worth about ₹31 lakh. Always plan for real returns, not nominal.

Is compound interest taxable in India?

Yes, compound interest is taxable in most instruments. Bank FD interest is taxed at your income tax slab rate (TDS of 10% above ₹40,000/year). Mutual fund long-term capital gains (held over 1 year for equity) are taxed at 12.5% above ₹1.25 lakh per year, post-2024 changes. PPF is completely tax-free under EEE (Exempt-Exempt-Exempt). Always factor in post-tax returns when comparing instruments. Our calculator shows gross returns; subtract tax based on your instrument.

Does the Groww compound interest calculator include SIP?

No — Groww's compound interest calculator only handles a one-time lumpsum. It does not support monthly SIP contributions. This calculator was built specifically because of that gap. Enter ₹0 as principal and add a monthly SIP amount to see real compounding wealth build over time. Most Indians build wealth through monthly SIPs, not one-time lumpsum investments.

Official Sources & Verification

To ensure accuracy, the formulas, rules, and tax provisions used on this page are verified against official government, regulatory, or institutional sources.

Last Verified: April 21, 2026

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Disclaimer: This calculator provides estimates based on the inputs you enter. Actual returns on mutual funds, stocks, FDs, and PPF may vary. Past performance does not guarantee future returns. Mutual fund investments are subject to market risks. Always read scheme documents carefully. MonuMoney.in is not a SEBI-registered advisor. Consult a qualified financial advisor for personalised advice.