What Is a SIP?
A Systematic Investment Plan (SIP) lets you invest a fixed amount in a mutual fund every month, usually by auto-debit from your bank account. Instead of investing a large sum at once, you build wealth step by step.
Two things make SIPs popular:
- Discipline: investing happens automatically, before you can spend the money.
- Rupee cost averaging: you buy more units when prices are low and fewer when they are high, which smooths out market ups and downs.
How to Use This SIP Calculator
- Monthly investment: how much you will invest every month.
- Expected return: the yearly return you expect. Equity funds have historically delivered around 10–12% over long periods, but returns are not guaranteed.
- Time period: how many years you will keep investing.
- Annual step-up (optional): how much you will increase your SIP each year.
The calculator shows your total invested amount, estimated returns and the total value at the end. The year-wise table above updates with every change.
SIP Calculation Formula
SIP returns are calculated using the future value of a monthly investment:
- P = Monthly SIP amount
- r = Monthly return (annual return ÷ 12 ÷ 100)
- n = Number of monthly instalments
Example: ₹1,000 a month at 12% for 1 year
- r = 12 ÷ 12 ÷ 100 = 0.01, n = 12
- You invest ₹12,000
- Estimated value = ₹12,809
Real mutual fund returns vary every year, so treat the result as an estimate, not a promise.
The Power of Compounding
Here's what ₹5,000 a month at 12% can grow into. Notice how the gains speed up in later years:
| Time period | Total invested | Estimated value | Money multiplied |
|---|---|---|---|
| 5 years | ₹3,00,000 | ₹4,12,432 | 1.4x |
| 10 years | ₹6,00,000 | ₹11,61,695 | 1.9x |
| 15 years | ₹9,00,000 | ₹25,22,880 | 2.8x |
| 20 years | ₹12,00,000 | ₹49,95,740 | 4.2x |
| 25 years | ₹15,00,000 | ₹94,88,175 | 6.3x |
| 30 years | ₹18,00,000 | ₹1,76,49,569 | 9.8x |
Assumes 12% yearly return. Actual returns will differ.
Going from 20 to 30 years adds only ₹6 lakh of investment but grows the value by about ₹1.26 crore. Time is the biggest driver of SIP returns.
Why Starting Early Matters
Two friends invest ₹5,000 a month at 12% until age 60:
The early starter invests only ₹6 lakh more but ends up with over three times the money. Waiting is the most expensive mistake in investing.
How the Return Rate Changes Your Result
₹5,000 a month for 15 years at different returns:
| Yearly return | Estimated value |
|---|---|
| 8% | ₹17,41,726 |
| 10% | ₹20,89,621 |
| 12% | ₹25,22,880 |
| 14% | ₹30,64,269 |
Step-up SIP: Grow Your SIP With Your Salary
A step-up (or top-up) SIP increases your monthly amount every year, usually in line with your salary hike.
Example: ₹5,000 a month for 15 years at 12%
- Fixed SIP: invest ₹9 lakh, value about ₹25.23 lakh
- With a 10% step-up every year: invest ₹19.06 lakh, value about ₹43.42 lakh
Try it with the Annual step-up slider in the calculator above.
How Much SIP Do You Need for a Goal?
Work backwards from the goal. For example, to build ₹1 crore in 15 years at 12%, you need a SIP of about ₹19,819 a month.
Adjust the amount in the calculator until the total value matches your goal, whether it's a house down payment, a child's education or retirement.
6 Tips for SIP Investors
Time in the market beats the amount you start with.
Falls let your SIP buy more units cheaply.
Raise your SIP when your income rises.
Equity for long goals, debt for short ones.
Not every day. Check performance against similar funds.
So you never have to break your SIP in a crisis.
Frequently Asked Questions
What is a SIP calculator?
A SIP calculator estimates how much your monthly mutual fund investments could grow to, based on the amount, expected return and time period. It shows the total invested, estimated gains and final value.
Are SIP returns guaranteed?
No. SIPs invest in mutual funds, whose returns depend on market performance. The calculator uses a fixed return to give an estimate; actual returns will vary from year to year.
What is the minimum amount to start a SIP?
Many mutual funds allow SIPs from ₹500 a month, and some from as little as ₹100. Check the minimum for the fund you choose.
Can I stop or pause my SIP?
Yes. You can stop a SIP at any time, and many fund houses also allow you to pause it for a few months. Your existing investment stays invested.
What happens if I miss a SIP instalment?
Usually nothing major. The instalment is skipped, though your bank may charge a fee for a failed auto-debit. Several missed instalments in a row can lead the fund house to cancel the SIP.
Is SIP better than lump sum?
A SIP suits regular income and reduces the risk of investing everything at a market peak. A lump sum can do better in a rising market. Many investors combine both.
How are SIP returns taxed?
Each SIP instalment is treated as a separate investment for tax. Gains on equity funds are taxed as short-term or long-term capital gains depending on how long each instalment was held. Tax rates change with budgets, so check the current rules.