Compound Growth Calculator
Project your portfolio or trading account growth year by year. Enter starting capital, return rate, monthly contributions and time horizon to see the power of compounding visualised.
Compound Growth Calculator
See how your capital grows with consistent returns and monthly contributions. Understand the power of compounding year by year.
| Rate | Final Value | Invested | Returns |
|---|---|---|---|
| 8% | ₹41.45 L | ₹20.00 L | +₹21.45 L |
| 12% | ₹62.45 L | ₹20.00 L | +₹42.45 L |
| 15% | ₹86.40 L | ₹20.00 L | +₹66.40 L |
| 18% | ₹1.21 Cr | ₹20.00 L | +₹1.01 Cr |
| Year | Portfolio Value | Total Invested | Gains | Growth % |
|---|---|---|---|---|
| Yr 1 | ₹3,53,458 | ₹3,20,000 | +₹33,458 | 10.5% |
| Yr 2 | ₹5,26,379 | ₹4,40,000 | +₹86,379 | 19.6% |
| Yr 3 | ₹7,21,230 | ₹5,60,000 | +₹1,61,230 | 28.8% |
| Yr 4 | ₹9,40,794 | ₹6,80,000 | +₹2,60,794 | 38.4% |
| Yr 5 | ₹11,88,203 | ₹8,00,000 | +₹3,88,203 | 48.5% |
| Yr 6 | ₹14,66,990 | ₹9,20,000 | +₹5,46,990 | 59.5% |
| Yr 7 | ₹17,81,135 | ₹10,40,000 | +₹7,41,135 | 71.3% |
| Yr 8 | ₹21,35,120 | ₹11,60,000 | +₹9,75,120 | 84.1% |
| Yr 9 | ₹25,34,000 | ₹12,80,000 | +₹12,54,000 | 98.0% |
| Yr 10 | ₹29,83,468 | ₹14,00,000 | +₹15,83,468 | 113.1% |
| Yr 11 | ₹34,89,940 | ₹15,20,000 | +₹19,69,940 | 129.6% |
| Yr 12 | ₹40,60,645 | ₹16,40,000 | +₹24,20,645 | 147.6% |
| Yr 13 | ₹47,03,730 | ₹17,60,000 | +₹29,43,730 | 167.3% |
| Yr 14 | ₹54,28,373 | ₹18,80,000 | +₹35,48,373 | 188.7% |
| Yr 15 | ₹62,44,920 | ₹20,00,000 | +₹42,44,920 | 212.2% |
About Compound Growth Calculator
Compound interest is often called the eighth wonder of the world — and for good reason. When you earn returns on your invested capital, and then earn returns on those returns in subsequent periods, the growth is not linear — it is exponential. ₹1 lakh at 12% annual return grows to ₹3.1 lakh in 10 years, ₹9.6 lakh in 20 years, and ₹29.9 lakh in 30 years. Without adding a single rupee after the initial investment, the original ₹1 lakh grows nearly 30-fold in 30 years — entirely through the compounding of returns on returns.
The compound interest formula is: <strong>FV = P × (1 + r/n)^(n × t)</strong>, where P = principal investment, r = annual interest rate, n = compounding frequency per year (monthly = 12, quarterly = 4, annually = 1), and t = time in years. Monthly compounding produces a higher effective annual yield than annual compounding at the same stated rate. A 12% annual rate compounded monthly has an Effective Annual Rate (EAR) of 12.68% — the difference grows with higher interest rates and longer durations.
For traders, compound growth calculation is essential for account management. A trading account growing at a consistent 1% per month (12% annually) starts with ₹1 lakh and grows to approximately ₹1.82 lakh in 5 years and ₹3.30 lakh in 10 years from compounding alone. Increase that to 1.5% per month (18% annually) and the same ₹1 lakh becomes ₹2.44 lakh in 5 years and ₹5.97 lakh in 10 years. These differences look modest, but when you add monthly contributions — say ₹5,000/month — the 10-year gap between 12% and 18% annual compounding grows to several lakhs. This is why percentage return per month is the correct performance metric for traders, not absolute rupee profit.
Monthly contributions dramatically accelerate compound growth. A ₹1 lakh starting balance growing at 12% annually with ₹5,000/month additional contributions grows to approximately ₹14.7 lakh in 10 years and ₹57.3 lakh in 20 years — versus ₹9.6 lakh and ₹28.4 lakh respectively without contributions. This illustrates why consistent monthly investing — whether through SIP, systematic trading account growth, or regular savings — is far more powerful than any single large deposit.
How to Use the Compound Growth Calculator
Enter initial capital — your starting investment amount or current account balance.
Set annual return rate — your expected annual percentage return. For equity investments: 10–15%. For a consistently profitable trading account: 20–30%.
Choose compounding frequency — monthly is most realistic for most investments and trading accounts. Annual compounding slightly understates growth.
Add monthly contributions (optional) — any regular monthly additions such as SIP, salary savings, or regular trading deposits.
Set investment period — the number of years. Run multiple scenarios (10, 20, 30 years) to see the dramatic impact of time on final value.
Pro Tips
Starting 10 years earlier with the same return rate and same monthly contribution typically results in 2–3× more final corpus. The growth curve is exponential — the last few years contribute enormously more than the first few. This is why starting at 25 vs 35 makes an enormous difference at retirement.
Set a monthly return percentage target (e.g., 3%) and use this calculator to see where consistent performance takes your account. Trading account goals become more motivating when you visualise the 5-year and 10-year endpoints of consistent compounding.
A 50% loss requires a 100% gain to recover. A 20% loss needs only a 25% gain. Preserving your compound growth curve by keeping maximum drawdown small is more valuable than chasing higher returns. The formula: Recovery needed = 1/(1-loss%) − 1.
Frequently Asked Questions
What is the difference between monthly and annual compounding?
Monthly compounding adds interest 12 times per year, so you earn interest on the previous month's accumulated returns. Annual compounding does this only once per year. At 12% annual rate, monthly compounding yields an Effective Annual Rate (EAR) of 12.68%. Over 20 years on ₹10 lakh, the difference between annual and monthly compounding at 12% is approximately ₹2.8 lakh.
How does compound growth apply to a trading account?
Compounding in trading requires two disciplines: reinvesting all profits (not withdrawing them) and scaling position sizes proportionally as the account grows. The danger most traders face is withdrawing profits for lifestyle expenses, which resets the compounding base. A ₹1 lakh account compounding at 2%/month with zero withdrawals for 3 years reaches ₹2.05 lakh. The same account where the trader withdraws 50% of profits annually still grows — but reaches only ₹1.51 lakh at 3 years. The difference widens dramatically over longer periods, which is why even partial reinvestment of trading profits matters enormously.
What is the Rule of 72?
Divide 72 by your annual return rate to estimate how long to double your money. At 12%: 72 ÷ 12 = 6 years. At 6%: 12 years. At 24%: 3 years. The rule is surprisingly accurate for rates between 6–20%. It helps quickly compare growth trajectories without a calculator and illustrates why higher sustained returns compound dramatically faster over long periods.
Why does starting to invest early matter so much?
Due to exponential growth, every year matters enormously. A 25-year-old investing ₹5,000/month for 35 years at 12% accumulates approximately ₹3.24 crore. Starting at 35 — same ₹5,000/month for only 25 years — yields ₹94 lakh. Less than one-third the corpus, despite investing only 10 fewer years and ₹6 lakh less total. This massive difference exists entirely because of the exponential nature of compounding.
What compounding frequency does my mutual fund use?
Equity mutual funds don't technically "compound" in the traditional sense — they invest in stocks that grow in value, and the NAV reflects this growth continuously (daily). The equivalent of "daily compounding" applies. When comparing with this calculator, use annual compounding as a conservative approximation, or monthly compounding as a closer real-world estimate of how fund value grows.
How much should I add monthly to reach my financial goal?
Work backwards: enter your goal amount as target, your current capital as starting balance, your expected return, and time horizon. Adjust monthly contributions until the projected final value equals your goal. This reverse engineering approach — figuring out the required monthly saving from your goal rather than projecting from current saving — is how professional financial planners structure goal-based portfolios.
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