Rs 5,000 per month. That is all it takes to build Rs 1 crore. Don't believe it? Let us do the math — and we will give you a free calculator to verify every number in this article.
A SIP (Systematic Investment Plan) is one of the most powerful wealth-building tools available to Indian investors. But most people either do not understand how the math works, or they underestimate what consistent investing can do over 20 to 30 years.
In this guide, we will break down the SIP formula, show you exactly how to use our SIP Calculator, run real return projections at different amounts and timeframes, and cover the step-up SIP strategy that most financial advisors never mention.
No jargon. No fluff. Just the math that matters.
What Is a SIP? Systematic Investment Plan in 60 Seconds
A SIP is a method of investing a fixed amount of money into a mutual fund at regular intervals — usually monthly. Think of it like a recurring deposit at a bank, except your money goes into the stock market (or debt market) through a mutual fund.
Here is how it works in practice:
- You choose a mutual fund (say, a Nifty 50 index fund)
- You set up a monthly SIP of Rs 5,000
- On a fixed date every month, Rs 5,000 is automatically debited from your bank account
- That money buys units of the mutual fund at the current NAV (Net Asset Value)
- When the market is down, your Rs 5,000 buys more units. When it is up, you buy fewer units
This automatic buying at different price levels is called rupee cost averaging. You do not need to time the market. You do not need to watch stock prices. You just invest consistently, and the math takes care of the rest.
The minimum SIP amount for most mutual funds in India is Rs 500 per month. Some funds allow Rs 100. There is no maximum limit.
You can start, stop, increase, or pause a SIP at any time. There is no lock-in period for regular mutual funds (ELSS funds have a 3-year lock-in, but even those can be done via SIP).
Read our beginner's guide: How to Start a SIP With Just Rs 500
The SIP Formula Explained Simply
The formula to calculate the future value of a SIP is:
FV = P x [{(1 + r)^n - 1} / r] x (1 + r)
Let us break down each variable:
- FV = Future Value — the total amount you will have at the end
- P = Monthly SIP amount (the fixed amount you invest every month)
- r = Monthly rate of return (annual return divided by 12, expressed as a decimal)
- n = Total number of SIP installments (years multiplied by 12)
The (1 + r) multiplied at the end accounts for the fact that each installment earns returns from the date of investment (beginning of period calculation).
Worked Example: Rs 5,000 SIP for 20 Years at 12% Annual Return
Let us plug in the numbers step by step.
- P = Rs 5,000
- Annual return = 12%, so monthly return r = 12% / 12 = 1% = 0.01
- Duration = 20 years, so n = 20 x 12 = 240 months
Step 1: Calculate (1 + r)^n
(1.01)^240 = 10.8926
Step 2: Calculate [(1 + r)^n - 1] / r
[10.8926 - 1] / 0.01 = 9.8926 / 0.01 = 989.26
Step 3: Multiply by P and (1 + r)
FV = 5,000 x 989.26 x 1.01 = Rs 49,95,764
So a Rs 5,000 monthly SIP at 12% annual return gives you approximately Rs 49.96 lakh after 20 years. Your total investment was only Rs 12 lakh (5,000 x 240 months). The remaining Rs 37.96 lakh is pure compounding — your money making money.
Do not want to do this math by hand? That is exactly what our calculator is for.
How to Use Our SIP Calculator
Our SIP Calculator is designed to give you instant projections with zero effort. Here is how to use it:
Step 1: Enter Your Monthly SIP Amount
Use the slider or type in your monthly investment amount. This can be anywhere from Rs 500 to Rs 10,00,000. If you are just starting out, Rs 5,000 is a good benchmark. If you are already investing and want to see where you are headed, enter your actual SIP amount.
Step 2: Set Your Expected Annual Return
This is the annualized return you expect from your mutual fund. Here are some benchmarks based on historical data:
- Conservative (Debt funds): 6% to 8%
- Moderate (Balanced/Hybrid funds): 9% to 11%
- Aggressive (Equity funds): 12% to 15%
- Index funds (Nifty 50 historical): 12% to 13% over 15+ year periods
A common and reasonable assumption for long-term equity SIPs is 12%. This is what the Nifty 50 has delivered historically over 20+ year periods. Do not use 15% or 18% — those are optimistic and lead to unrealistic expectations.
Step 3: Choose Your Investment Duration
Select how many years you plan to invest. The magic of SIP really shows up after 15 years. At 10 years you see decent growth. At 20 to 25 years, compounding creates life-changing wealth.
Step 4: Read Your Results
The calculator shows you:
- Total amount invested — your actual out-of-pocket money
- Estimated returns — the wealth generated by compounding
- Total future value — your projected corpus
- A visual chart showing how your money grows year by year
Play with different scenarios. See what happens if you increase your SIP by Rs 2,000. See the difference between 15 years and 25 years. That gap is where the real insight lives.
SIP Return Examples: The Power of Time
Here is a comprehensive table showing what different SIP amounts grow to at 12% annual returns over various time periods. Every number in this table can be verified using our SIP Calculator.
| Monthly SIP | 10 Years | 15 Years | 20 Years | 25 Years | 30 Years |
|---|---|---|---|---|---|
| Rs 5,000 | Rs 11.62 L | Rs 25.23 L | Rs 49.96 L | Rs 94.88 L | Rs 1.76 Cr |
| Rs 10,000 | Rs 23.23 L | Rs 50.46 L | Rs 99.91 L | Rs 1.90 Cr | Rs 3.53 Cr |
| Rs 25,000 | Rs 58.08 L | Rs 1.26 Cr | Rs 2.50 Cr | Rs 4.74 Cr | Rs 8.82 Cr |
| Rs 50,000 | Rs 1.16 Cr | Rs 2.52 Cr | Rs 5.00 Cr | Rs 9.49 Cr | Rs 17.64 Cr |
Total amount invested in each case:
| Monthly SIP | 10 Years | 15 Years | 20 Years | 25 Years | 30 Years |
|---|---|---|---|---|---|
| Rs 5,000 | Rs 6 L | Rs 9 L | Rs 12 L | Rs 15 L | Rs 18 L |
| Rs 10,000 | Rs 12 L | Rs 18 L | Rs 24 L | Rs 30 L | Rs 36 L |
| Rs 25,000 | Rs 30 L | Rs 45 L | Rs 60 L | Rs 75 L | Rs 90 L |
| Rs 50,000 | Rs 60 L | Rs 90 L | Rs 1.20 Cr | Rs 1.50 Cr | Rs 1.80 Cr |
Look at the Rs 5,000 row. You invest Rs 18 lakh over 30 years. You get back Rs 1.76 crore. That is nearly 10 times your investment. And all you did was invest Rs 5,000 every month without stopping.
Now look at the difference between 20 years and 30 years for the Rs 10,000 SIP. You invest an additional Rs 12 lakh (from Rs 24 lakh to Rs 36 lakh). But your corpus jumps from Rs 99.91 lakh to Rs 3.53 crore — an increase of Rs 2.53 crore. Those last 10 years contributed more wealth than the first 20 years combined.
This is compounding. It starts slow and then accelerates aggressively. The biggest mistake Indian investors make is stopping too early.
Step-Up SIP: The Strategy Nobody Talks About
A regular SIP keeps the same amount every month for the entire duration. But your income does not stay the same, does it? You get salary hikes. You get promotions. Your earning power grows every year.
A Step-Up SIP (also called a Top-Up SIP) increases your SIP amount by a fixed percentage every year. Most mutual fund platforms let you set this up automatically.
Here is why this matters. Let us compare two investors, both starting with Rs 5,000 per month at 12% annual return for 25 years:
| Strategy | Starting SIP | Annual Increase | Total Invested | Final Corpus |
|---|---|---|---|---|
| Flat SIP | Rs 5,000 | 0% | Rs 15.00 L | Rs 94.88 L |
| Step-Up SIP (10%) | Rs 5,000 | 10% per year | Rs 59.02 L | Rs 3.20 Cr |
| Step-Up SIP (15%) | Rs 5,000 | 15% per year | Rs 1.09 Cr | Rs 5.42 Cr |
Read those numbers again. With a 10% annual step-up, your Rs 5,000 SIP grows into Rs 3.20 crore instead of Rs 94.88 lakh. That is more than 3 times the corpus, and the additional investment is only Rs 44 lakh.
The step-up SIP works because you are adding more money during the early years when compounding has the longest runway. Every additional rupee invested in year 5 has 20 more years to compound than a rupee invested in year 25.
A 10% annual increase is very reasonable. If your salary grows by 8% to 12% per year (which is normal in India for salaried professionals), you can easily increase your SIP by 10% without feeling any pinch.
Try our Step-Up SIP Calculator to see exactly how much more you could accumulate with annual increases.
How to Set Up a Step-Up SIP
Most platforms support this natively:
- Groww: Enable "Step-Up" when creating a SIP
- Kuvera: Set annual increase percentage in SIP setup
- Zerodha Coin: Manual increase needed each year
- AMC websites: Most support top-up SIP option
If your platform does not support automatic step-up, just manually increase your SIP every January. Set a calendar reminder. It takes 2 minutes.
SIP vs Lumpsum: When to Use Which
This is one of the most common questions investors ask. Should you invest a large sum all at once (lumpsum), or spread it over time through SIP?
The honest answer: it depends on the market conditions and your psychology.
When SIP Wins
- Volatile or falling markets: SIP buys more units when prices are low, reducing your average cost
- You have regular monthly income: SIP matches your cash flow naturally
- You are new to investing: SIP reduces the risk of entering at a market peak
- You cannot stomach large short-term losses: Spreading out investment reduces emotional stress
When Lumpsum Wins
- Rising markets: In a sustained bull run, lumpsum outperforms because your full amount is invested from Day 1
- You received a windfall: Bonus, inheritance, property sale — parking it in a savings account earning 3% while doing SIP over 12 months loses you potential returns
- Historically, over long periods (15+ years): Lumpsum has outperformed SIP about 65% of the time because markets go up more often than they go down
The Practical Solution
Use both. Run your monthly SIP for regular income. When you get a bonus or windfall, invest 50% as lumpsum immediately and do SIP with the remaining 50% over 3 to 6 months. This balances between capturing growth and managing risk.
Compare the numbers yourself with our SIP vs Lumpsum Calculator.
Detailed analysis: SIP vs Lumpsum: Which Is Actually Better?
Tax on SIP Returns: LTCG Explained
Many investors forget about taxes when projecting SIP returns. Here is the current tax structure for equity mutual fund SIPs (as of April 2026):
Equity Mutual Funds (including equity-oriented hybrid funds)
| Holding Period | Tax Type | Tax Rate | Exemption |
|---|---|---|---|
| Less than 12 months | STCG (Short-Term Capital Gains) | 20% | None |
| More than 12 months | LTCG (Long-Term Capital Gains) | 12.5% | Rs 1.25 lakh per year |
How SIP Taxation Actually Works
This is where it gets tricky. Each SIP installment is treated as a separate purchase. So when you sell, each installment has its own holding period.
Example: You start a SIP in January 2024. In March 2025, you redeem all units.
- January 2024 installment: held for 14 months — LTCG (12.5%)
- February 2024 installment: held for 13 months — LTCG (12.5%)
- March 2024 installment: held for 12 months — LTCG (12.5%)
- April 2024 onwards: held for less than 12 months — STCG (20%)
This is why financial planners recommend holding SIP investments for at least 12 months beyond your last installment before redeeming.
Practical Tax Calculation
Let us say your SIP corpus is Rs 50 lakh after 20 years. Your total investment was Rs 12 lakh. Your gain is Rs 38 lakh.
- LTCG exemption: Rs 1.25 lakh
- Taxable gain: Rs 38 lakh - Rs 1.25 lakh = Rs 36.75 lakh
- Tax at 12.5%: Rs 4.59 lakh
- Post-tax corpus: Rs 50 lakh - Rs 4.59 lakh = Rs 45.41 lakh
The Rs 1.25 lakh exemption is per financial year. If you redeem in multiple years, you can use the exemption each year. Smart withdrawal planning can save you significant tax.
Use our Mutual Fund Returns Calculator which factors in LTCG tax for more accurate projections.
5 SIP Mistakes That Cost You Returns
Mistake 1: Choosing the Wrong Fund Category
Starting a SIP is not enough. Starting it in the right fund matters. A SIP in a sectoral fund (like pharma or IT) concentrates risk. A SIP in a fund with a poor track record wastes your time. For most people, a diversified equity fund or a Nifty 50 index fund is the best starting point.
Mistake 2: Stopping SIP During a Market Crash
This is the single biggest wealth destroyer. When the market falls 20% to 30%, your SIP is buying units at a massive discount. These cheap units will multiply when the market recovers. Stopping your SIP during a crash is like leaving a sale halfway through because the store is too crowded.
During the 2020 COVID crash, investors who continued their SIPs saw 40% to 60% gains within 12 to 18 months. Those who stopped missed the entire recovery.
Mistake 3: Not Increasing SIP Amount Annually
If you started a Rs 5,000 SIP five years ago and are still investing Rs 5,000, you are actually investing less in real terms because of inflation. Your purchasing power has dropped, but your SIP has not kept up. A 10% annual step-up should be the default, not the exception.
Mistake 4: Ignoring the Expense Ratio
A fund with a 2% expense ratio needs to outperform a fund with a 0.5% expense ratio by 1.5% every single year just to give you the same returns. Over 20 years, this compounds into a massive difference. Check expense ratios before starting a SIP. For passive investors, index funds with expense ratios under 0.3% are ideal.
Learn more: Best SIP Plans for Beginners in 2026
Mistake 5: Investing Without a Clear Goal
A SIP without a goal is like driving without a destination. You might end up somewhere, but it probably will not be where you want. Define your goal: retirement corpus, child's education, house down payment. Then work backwards to determine how much you need to invest monthly. Our SIP Calculator is built exactly for this reverse calculation.
Best SIP Amounts by Income Level
A common question: how much should I invest through SIP? The general rule is at least 20% of your take-home salary. But here is a more detailed breakdown:
| Monthly Take-Home Salary | Recommended SIP Amount | Corpus After 20 Years (at 12%) | Corpus After 30 Years (at 12%) |
|---|---|---|---|
| Rs 20,000 | Rs 3,000 | Rs 29.98 L | Rs 1.06 Cr |
| Rs 30,000 | Rs 5,000 | Rs 49.96 L | Rs 1.76 Cr |
| Rs 50,000 | Rs 10,000 | Rs 99.91 L | Rs 3.53 Cr |
| Rs 75,000 | Rs 15,000 | Rs 1.50 Cr | Rs 5.29 Cr |
| Rs 1,00,000 | Rs 25,000 | Rs 2.50 Cr | Rs 8.82 Cr |
| Rs 1,50,000 | Rs 35,000 | Rs 3.50 Cr | Rs 12.35 Cr |
| Rs 2,00,000 | Rs 50,000 | Rs 5.00 Cr | Rs 17.64 Cr |
These amounts assume a flat SIP with no step-up. With a 10% annual step-up, these numbers roughly triple over 25 to 30 years.
If you cannot manage 20% right now, start with whatever you can — even Rs 1,000. The habit of investing matters more than the amount. You can always increase later.
Notice the Rs 1 lakh salary line: a Rs 25,000 SIP for 30 years at 12% gives you Rs 8.82 crore. That is generational wealth built on discipline, not luck.
Where Should You Start Your SIP?
For beginners, we recommend starting with one of these:
- Nifty 50 Index Fund — lowest cost, most diversified, tracks the market
- Nifty Next 50 Index Fund — slightly more aggressive, captures mid-large cap growth
- Flexi Cap Fund — active fund that invests across market caps, good for first-time investors who want professional management
Start with one fund. Not three. Not five. One. Add more as your knowledge and corpus grow.
Browse our complete Mutual Funds section for detailed comparisons and reviews.
Frequently Asked Questions
How are SIP returns calculated?
SIP returns are calculated using the XIRR (Extended Internal Rate of Return) method, which accounts for the timing of each investment. Since each monthly installment is made on a different date at a different NAV, simple percentage returns do not work. XIRR gives you a single annualized return figure that accounts for all your individual transactions. Our SIP Calculator uses the standard future value formula for projections, but your actual returns should be tracked using XIRR.
What is the minimum SIP amount in India?
Most mutual funds allow a minimum SIP of Rs 500 per month. Some funds, particularly from AMCs like SBI, HDFC, and Nippon India, offer SIPs starting at Rs 100. There is no maximum limit. You can check the minimum SIP amount on the specific fund's page on any mutual fund platform or the AMC website.
Can I stop my SIP anytime?
Yes. A SIP is not a binding contract. You can stop, pause, or cancel your SIP at any time through your mutual fund platform. Stopping a SIP only means no new installments will be deducted. Your existing invested units remain in the fund and continue to grow (or decline) with the market. You can redeem those units whenever you want. The only exception is ELSS (tax-saving) funds, where each installment has a 3-year lock-in from its date of investment.
Is SIP better than a Recurring Deposit (RD)?
For long-term goals (7+ years), equity SIPs have historically delivered significantly higher returns than RDs. An RD gives you 6% to 7% pre-tax, which becomes about 4% to 5% post-tax. An equity SIP has historically delivered 12% to 13% over 15+ year periods. However, RDs are risk-free and guaranteed, while SIPs carry market risk. For short-term goals (under 3 years), an RD or debt fund SIP is safer. For anything above 5 to 7 years, equity SIPs are the clear winner.
What is the best SIP duration for maximum returns?
The longer the better. Compounding needs time to work its magic. At 10 years, you see solid growth. At 15 years, compounding starts accelerating visibly. At 20 to 25 years, the growth curve becomes exponential. We recommend a minimum of 10 years for any equity SIP and ideally 15 to 20 years for wealth creation goals like retirement or children's education. If you are in your 20s, a 30-year SIP is the most powerful financial tool at your disposal.
The Bottom Line
The SIP formula is simple. The calculator does the math for you. The strategy is straightforward: invest consistently, increase annually, and do not stop during downturns.
Rs 5,000 per month at 12% for 30 years becomes Rs 1.76 crore. With a 10% annual step-up, that same starting amount grows past Rs 5 crore. This is not speculation. This is not crypto. This is basic compound interest applied to India's equity market, which has delivered 12% to 13% annualized returns over every 20+ year period in its history.
The only question is whether you will start today or keep planning to start "next month."
Open our SIP Calculator now — plug in your numbers and see your future corpus. Then set up your SIP before you close this tab.
SIP Calculator
See how your SIP grows
- Project corpus for any monthly SIP amount
- Visualise the power of compounding over time
- Compare step-up SIP vs regular SIP