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Full breakdown
About SIP
What is SIP?
Systematic Investment Plan — investing a fixed amount monthly in mutual funds or index funds, benefiting from rupee-cost averaging.
Compounding power
Starting early is critical. Rs 5,000/month at 12% for 30 years grows to over Rs 1.76 crore despite only Rs 18 lakh invested.
Returns note
Expected return is an estimate. Actual mutual fund returns vary. Equity funds historically average 10–15% over long periods.
Decision Support
Compare Return % against your goal
If Return % is lower than expected, consider whether the assumed rate is realistic for your fund choice — equity funds historically return more than debt funds, but with more volatility.
A negative Total Returns figure is a modeled loss, not an error
If you entered a negative expected return to stress-test a bad scenario, a negative Total Returns figure is the correct, intended result — not a bug.
Consistency matters more than timing
The core benefit of SIP is investing the same amount regardless of market conditions — check this projection against what a lump-sum investment of the same total would produce using the Compound Interest Calculator.
➜ Next step: See what today's investing habit becomes at retirement with the Retirement Calculator, or track how it fits your overall position with the Net Worth Calculator.
How to Use the SIP Calculator
- Enter monthly investment amount — the fixed amount you plan to invest every month through the SIP.
- Set expected annual return — the average annual return you expect from your investment. Use 10–12% for equity mutual funds (historical average), 6–8% for debt funds.
- Enter investment period — the number of years you plan to continue the SIP. The longer the period, the more powerful the compounding effect.
- Review results — see total amount invested, estimated returns, and final corpus. The difference between invested amount and final corpus is your wealth gain from compounding.
- Adjust inputs — try different monthly amounts and periods to see how small increases in contribution or time dramatically change the final corpus.
🚀 SIP power: Investing $500/month for 30 years at 12% annual return gives a final corpus of approximately $1,697,000 — while you only invested $180,000. The remaining $1,517,000 is pure compound growth. Starting 10 years earlier nearly triples the final amount.
Understanding SIP and Compound Growth
📈 What Is SIP?
Systematic Investment Plan — investing a fixed amount at regular intervals (usually monthly) regardless of market conditions. Removes the need to time the market and builds discipline through automatic investing.
💹 Rupee Cost Averaging
By investing the same amount monthly, you buy more units when prices are low and fewer when prices are high. This automatically averages your purchase cost over time, reducing the impact of market volatility.
🔄 Power of Compounding
Returns earned on previous returns. At 12% annual return, money doubles every 6 years. A $1,000 invested at age 25 becomes $29,960 by age 65. The same $1,000 invested at age 35 becomes $9,646 — 3× less for starting 10 years later.
⏰ Time Is the Key Variable
Of all inputs, time has the most dramatic impact. Increasing monthly investment by 50% adds 50% to your corpus. Starting 10 years earlier can triple your final corpus. Time cannot be bought back — starting early is the most valuable financial decision.
📊 Step-Up SIP
Increasing your SIP amount by 10% annually alongside your income growth dramatically accelerates corpus building. Starting at $300/month and increasing 10% annually reaches the same final corpus as starting at $800/month with no increases.
🎯 Realistic Returns
Equity funds: 10–14% long-term. Balanced funds: 8–11%. Debt funds: 6–8%. Use conservative estimates for planning — 10% for equity, 7% for debt. If you earn more, it is a bonus.
Building Wealth Through SIP
The early start advantage
Starting a SIP at 25 vs 35 makes an enormous difference. Investing $300/month from age 25 to 60 (35 years) at 12% produces approximately $1,974,000. Starting at 35 (25 years) produces $566,000 — just 29% of the amount, for investing only 29% fewer years. The non-linear impact of time is the most important concept in long-term investing.
SIP during market downturns
Market downturns feel uncomfortable but are actually beneficial for SIP investors — your fixed investment buys more units at lower prices. Investors who continued SIPs through the 2008–2009 market crash and 2020 COVID crash generated significantly higher returns than those who paused. The discipline to continue during downturns is what separates successful long-term investors from average ones.
Goal-based SIP planning
Work backward from your financial goal. Need $500,000 in 15 years at 12% annual return? Use this calculator to find the required monthly SIP amount (~$991/month). This goal-based approach makes investing purposeful rather than arbitrary and helps maintain commitment during market volatility.
🎯 Golden SIP rules: Start as early as possible. Never stop during market downturns. Increase amount by 10% each year. Stay invested for at least 7–10 years to let compounding work. Avoid switching funds frequently — consistency beats optimization.
SIP Formula
Future Value = P × [((1 + r)ⁿ − 1) ÷ r] × (1 + r), where P is the monthly investment, r is the monthly rate of return, and n is the total number of months.
Worked example
$5,000/month, 12% annual return (1% monthly), 10 years (120 months): Future Value = 5,000 × [((1.01)^120 − 1) ÷ 0.01] × 1.01 = $1,161,695.38. Total invested = $600,000, so $561,695.38 came purely from returns.
Assumption: the monthly rate is assumed constant for the entire period — actual fund returns vary month to month even when the long-run average matches this input.
Common Mistakes
Stopping SIP during a downturn
Pausing contributions when prices fall means missing the lower-priced units that drive rupee-cost averaging — historically the opposite of what successful long-term SIP investors do.
Assuming a constant rate is guaranteed
This calculator shows what a constant average return would produce — real fund returns fluctuate, and a below-average multi-year stretch is a normal part of investing, not a sign something is wrong.
Ignoring expense ratios
Fund management fees compound against you the same way returns compound for you — a 2% expense ratio on a 12% gross return leaves a meaningfully lower net return over decades.
Confusing SIP with a lump-sum investment
This tool models regular monthly contributions. For a single upfront amount, use the Compound Interest Calculator instead.
Frequently Asked Questions
What is SIP?
Systematic Investment Plan (SIP) is a method of investing a fixed amount regularly (monthly) into mutual funds or index funds. It automates investing and benefits from rupee-cost averaging — buying more units when prices are low and fewer when high.
What is the SIP return formula?
Future Value = P × ((1+r)ⁿ − 1) / r × (1+r), where P = monthly investment, r = monthly return rate (annual rate / 12 / 100), n = total months invested.
What is rupee-cost averaging?
Because you invest a fixed amount regardless of market conditions, you automatically buy more units when prices fall and fewer when prices rise. Over time, this averages out your cost per unit and reduces the impact of market volatility.
SIP vs Lump Sum — which is better?
SIP is better for regular salaried investors as it removes the need to time the market and builds discipline. Lump sum can outperform during strong bull markets if timed correctly, but carries higher risk. Most financial advisors recommend SIP for retail investors.
What return rate should I use for calculations?
Indian equity mutual funds have historically returned 12–15% annually over 10+ year periods. Conservative estimates use 10–12%. Debt funds average 6–8%. Always use conservative estimates for financial planning.
References
🏛️ Securities and Exchange Board of India
Mutual fund and SIP regulatory standards — sebi.gov.in
📄 Your fund's official documents
For actual historical returns and expense ratios, check your fund's official fact sheet rather than a general estimate.
Last updated: 14 July 2026 · Assumes a constant monthly rate — real fund returns vary month to month.