Rs 1 Lakh Compound Interest Calculator - 10 Years
Rs 1 lakh at compound interest for 10 years: at 7% = Rs 1.97 lakh (FD/PPF territory), at 10% = Rs 2.59 lakh (hybrid fund territory), at 12% = Rs 3.11 lakh (large-cap equity), at 15% = Rs 4.05 lakh (mid-cap equity). The 3% difference between 12% and 15% grows your Rs 1 lakh by Rs 94,000 more over 10 years.
Total Amount
₹1,64,531
Interest Earned
₹64,531
| Year | Interest Earned | Total Amount |
|---|---|---|
| 1 | ₹10,471 | ₹1,10,471 |
| 2 | ₹22,039 | ₹1,22,039 |
| 3 | ₹34,818 | ₹1,34,818 |
| 4 | ₹48,935 | ₹1,48,935 |
| 5 | ₹64,531 | ₹1,64,531 |
What is the Compound Interest?
Compound interest is interest earned on both the original principal and the accumulated interest from previous periods. Albert Einstein reportedly called it the eighth wonder of the world. The more frequently interest compounds, the faster your money grows.
Formula
A = P × (1 + r/n)^(n × t)- P
- = Principal amount
- r
- = Annual interest rate (decimal)
- n
- = Compounding periods per year
- t
- = Time in years
How to use the Compound Interest
- 1
Enter the principal amount
This is your starting investment or loan amount.
- 2
Enter the annual interest rate
Use the stated annual rate from your bank or investment product.
- 3
Choose the compounding frequency
Annual, half-yearly, quarterly, monthly, or daily. Most Indian FDs use quarterly.
- 4
Enter the time period in years
The longer the period, the more dramatic the compounding effect.
- 5
Review the growth breakdown
The calculator shows the final amount, total interest earned, and a year-by-year growth table.
Frequently asked questions
What is the difference between simple and compound interest?
Simple interest is calculated only on the original principal — you earn the same amount every year. Compound interest is calculated on principal plus accumulated interest, so each year you earn more than the last. Over long periods, the difference is dramatic: ₹1 lakh at 10% for 20 years is ₹3 lakh simple vs ₹6.7 lakh compound.
How often should interest compound for maximum growth?
More frequent compounding gives slightly higher returns, but the difference between monthly and daily compounding is tiny. At 10% annual rate on ₹1 lakh for 10 years: annual = ₹2.59 lakh, quarterly = ₹2.68 lakh, monthly = ₹2.71 lakh, daily = ₹2.72 lakh. Focus on the rate and duration, not the compounding frequency.
What is the rule of 72?
The rule of 72 is a quick mental shortcut: divide 72 by the annual return to estimate how many years it takes to double your money. At 6% it takes 12 years, at 8% it takes 9 years, at 12% it takes 6 years. The rule is remarkably accurate for rates between 4% and 15%.
Do Indian FDs use simple or compound interest?
Most Indian bank FDs use compound interest, typically compounded quarterly. Tax-saver FDs, cumulative FDs, and most retail FDs compound quarterly. Non-cumulative FDs pay out interest periodically (monthly or quarterly), so the compounding benefit only applies if you reinvest the payouts.
Is compound interest taxable in India?
Yes. Interest income from FDs, savings accounts, and most debt instruments is taxed at your income tax slab rate as "Income from Other Sources". Equity returns are treated differently (LTCG at 12.5% above ₹1.25 lakh, STCG at 20%). Tax is deducted at source (TDS) by the bank at 10% if interest exceeds ₹40,000/year (₹50,000 for seniors).
Sources
Weekly Indian rate update
RBI repo, top FD rates, tax deadlines. Free. No spam.
Calculated with CalcCrack
Common questions about Rs 1 Lakh Compound Interest Calculator - 10 Years
What investment options give 12% compound returns in India?
Nifty 50 index funds have historically delivered 12-14% CAGR over 10+ year periods. Flexi-cap mutual funds: 12-15%. Small and mid-cap funds in good market cycles: 15-20% (but with high volatility). No investment guarantees 12% - these are historical averages. PPF guarantees 7.1%. SBI/HDFC FD: 7-7.5%. Risk-return trade-off is real.
Is Rs 1 lakh a good amount to start investing?
Rs 1 lakh is a solid start. Options: (1) Start Rs 8,333/month SIP (Rs 1 lakh/year) in equity mutual fund - builds habit. (2) Full Rs 1 lakh lumpsum in a balanced advantage fund or equity fund using STP over 3-6 months. (3) Split: Rs 50,000 in liquid FD as emergency reserve, Rs 50,000 in equity fund SIP. Starting with Rs 1 lakh at any age beats waiting to accumulate more.
How does tax affect the actual compound return on Rs 1 lakh?
For equity mutual funds held 10+ years: LTCG tax at 12.5% applies only on gains above Rs 1.25 lakh/year. On Rs 1 lakh growing to Rs 3.11 lakh (Rs 2.11 lakh gain) over 10 years, if redeemed in one year: tax = 12.5% of (Rs 2.11L - Rs 1.25L) = Rs 10,750. Post-tax corpus = Rs 3.0 lakh. Effective post-tax CAGR drops from 12% to about 11.6%.