SIP Calculator: The Complete Guide to Planning Your Investments
A Systematic Investment Plan is the most popular way Indians invest in mutual funds. Instead of trying to time the market with a large lump sum, you invest a fixed amount every month — ₹500, ₹5,000, ₹50,000, whatever fits your budget. Over time, this disciplined approach harnesses two powerful forces: rupee cost averaging (buying more units when markets are low, fewer when high) and compounding (your returns earn their own returns).
How SIP returns work
Each monthly SIP instalment buys mutual fund units at that day's NAV (Net Asset Value). Your returns are not a simple fixed rate — they fluctuate with the market. However, over long periods (10+ years), equity mutual fund SIPs in India have historically delivered 12-15% CAGR. This calculator uses the Future Value of Annuity formula to project your corpus based on the expected return rate you enter.
The formula: FV = P × [((1+r)^n - 1) / r] × (1+r), where P is your monthly investment, r is the monthly return rate (annual ÷ 12), and n is the total number of months. For a ₹10,000 monthly SIP at 12% for 10 years, this gives approximately ₹23.2 lakh — of which ₹12 lakh is your invested amount and ₹11.2 lakh is compounding returns.
The power of step-up SIP
A step-up SIP (also called top-up SIP) increases your monthly investment by a fixed percentage every year. If you get a 10% salary hike, increasing your SIP by 10% too means your investment grows with your income — without feeling the pinch.
The impact is dramatic. A ₹10,000 monthly SIP at 12% for 20 years gives ₹99.9 lakh. Add a 10% annual step-up and the same 20 years produces ₹2.26 crore — more than double the flat SIP corpus. This is why financial planners call step-up SIPs the single most effective habit for long-term wealth creation.
The best time to start a SIP was 10 years ago. The second-best time is today. Even small amounts compound into meaningful wealth over 15-20 years.
SIP vs lumpsum — which is better?
This is one of the most common questions investors ask. The honest answer: it depends on your situation. If you receive a monthly salary, SIP is the natural fit — you invest from income as it comes. If you have a windfall (bonus, inheritance, maturity proceeds), deploying it as a lumpsum gives the money more time to compound.
Historically, lumpsum investments outperform SIP about 65-70% of the time over the same period, simply because more money is in the market for longer. However, SIP protects you from the risk of investing everything at a market peak. For most salaried individuals, the practical answer is both: a monthly SIP from your salary plus lumpsum investments from bonuses and savings. This calculator supports exactly that combination.
Expected returns by fund category
| Fund category | Typical 10-year return | Risk level |
|---|---|---|
| Large-cap equity | 10–12% | Moderate |
| Flexi-cap / Multi-cap | 12–14% | Moderate-High |
| Mid-cap equity | 13–16% | High |
| Small-cap equity | 14–18% | Very High |
| ELSS (tax-saving) | 11–14% | Moderate-High |
| Hybrid / Balanced | 8–11% | Low-Moderate |
| Debt / Bond funds | 6–8% | Low |
| Index funds (Nifty 50) | 11–13% | Moderate |
These are historical ranges and not promises. Past performance does not guarantee future results. Use these as rough guidance when entering the "Expected return" in the calculator above.
Tax on SIP returns
Returns from mutual fund SIPs are subject to capital gains tax. For equity funds (including ELSS, index funds, and flexi-cap): Short-Term Capital Gains (units held less than 12 months) are taxed at 20%. Long-Term Capital Gains above ₹1.25 lakh per financial year are taxed at 12.5%. Each SIP instalment is treated as a separate purchase — so FIFO (First In, First Out) applies when you redeem.
For debt funds (post-April 2023 rules): all gains are taxed at your income tax slab rate, regardless of holding period. There is no LTCG benefit for debt funds purchased after 1 April 2023.
The returns shown in this calculator are pre-tax. For post-tax estimates, use the Capital Gains Calculator when it's available.
How much should you invest via SIP?
A common rule of thumb: invest at least 15-20% of your monthly income through SIPs. If you're starting late (in your 30s), aim for 25-30%. The key is consistency — a ₹5,000 SIP maintained for 20 years beats a ₹50,000 SIP maintained for only 3 years.
Start with what's comfortable, then use the step-up feature to grow your investment every year. Even a 5% annual step-up makes a significant difference over a 15-20 year horizon.
Common mistakes to avoid
- Stopping SIP during market crashes — this is actually when SIP works best (you buy more units at lower prices)
- Expecting fixed returns — SIP returns fluctuate year to year; the 12% average is a long-term outcome, not a monthly guarantee
- Ignoring step-up — a flat SIP means your investment shrinks relative to your growing income each year
- Redeeming too early — compounding accelerates in the later years; a 10-year SIP earns more in years 8-10 than in years 1-3
- Not accounting for tax — equity LTCG above ₹1.25L is taxed at 12.5%; factor this into your target corpus
- Choosing funds based only on past 1-year returns — look at 5-year and 10-year track records instead