SIP Calculator India: How Much Should You Invest Every Month?
SIP — Systematic Investment Plan — is the single most powerful tool available to Indian retail investors. By investing a fixed amount every month into a mutual fund, you harness two forces simultaneously: rupee-cost averaging (you buy more units when prices are low, fewer when high) and compounding (your returns earn returns over time).
But the question everyone has is: how much should I invest? The answer depends entirely on your goal, your timeline, and your expected return. This article shows you exactly how to calculate it.
The SIP Formula
The math behind SIP is the standard PMT (payment) formula from financial planning:
Where: r = annual return / 12, n = months
In plain English: the SIP amount depends on three things — how much you need at the end, how long you have, and what return you expect.
How Much SIP to Build ₹1 Crore?
| Timeline | Expected Return | Monthly SIP Needed |
|---|---|---|
| 10 years | 12% | ₹43,500/month |
| 15 years | 12% | ₹18,600/month |
| 20 years | 12% | ₹8,600/month |
| 25 years | 12% | ₹4,200/month |
| 30 years | 12% | ₹2,100/month |
This table shows the power of time. A ₹2,100/month SIP started at age 25 grows to ₹1 crore by 55. The same goal started at 45 requires ₹43,500/month. Starting early is not advice — it's mathematics.
What Return Rate Should You Assume?
This is the most important question in SIP planning:
- Equity mutual funds (large-cap index): 11–13% CAGR over 15+ years historically. Use 12% for planning.
- Flexicap/multi-cap funds: 12–14% CAGR over long periods. Use 12%.
- Balanced/hybrid funds: 9–11% CAGR. Use 10%.
- Debt/liquid funds: 6–8%. Use 7%.
- Fixed deposits: 6–7%. Not suitable for long-term goals due to inflation.
Key rule: For goals more than 7 years away, use equity funds. For 3–7 years, use balanced funds. For under 3 years, use debt funds or RD.
SIP vs Lump Sum: Which is Better?
Both work, but for different situations:
SIP is better when: You have regular income but no large existing savings. You're investing for 10+ years. Markets are volatile (SIP averages your cost automatically).
Lump sum is better when: You have a large amount to invest (bonus, inheritance). Markets have just seen a significant correction (20%+ fall). Your timeline is short (under 3 years).
For most Indian salaried individuals building towards retirement, education, or a home, SIP is the default choice.
Step-Up SIP: The Smart Way to Invest
A step-up SIP increases your monthly investment by 10–15% every year, in line with your salary hikes. The impact is dramatic:
| Strategy | Starting SIP | After 20 years at 12% |
|---|---|---|
| Fixed SIP | ₹10,000/month | ₹99.9 lakh |
| Step-up 10%/year | ₹10,000/month | ₹1.99 crore |
| Step-up 15%/year | ₹10,000/month | ₹2.96 crore |
A 10% annual step-up nearly doubles the final corpus compared to a fixed SIP. Most mutual fund platforms (Zerodha Coin, Groww, MF Central) let you automate step-up SIPs.
Calculate Your SIP for Any Goal
Use our goal calculator to find the exact monthly SIP for your specific goal — retirement, home down payment, child's education, or wedding — with inflation adjustment built in.
🧮 Try the Goal Amount Calculator
Free, no login required. Get your personalised target and monthly SIP in 60 seconds.
Open Calculator →Frequently Asked Questions
At 12% annual return, you need a SIP of approximately ₹43,500/month to accumulate ₹1 crore in 10 years. Over 15 years, the same goal requires only ₹18,600/month. The shorter the timeline, the higher the required SIP.
Depends on when you start and your retirement goal. ₹5,000/month started at age 25 grows to ₹1.76 crore in 35 years at 12% — a good start but likely insufficient for full retirement. Combine with annual step-ups of 10% and you'll reach ₹5–6 crore.
For long-term (10+ years): Nifty 50 index funds (lowest cost), flexicap funds like Parag Parikh Flexicap, or large-cap funds. For medium-term (5–10 years): balanced advantage or aggressive hybrid funds. Stick to direct plans to save 0.5–1% in annual expense ratio.
Yes, SIPs have no lock-in (except ELSS funds which have 3-year lock-in). You can pause or stop anytime. The accumulated units remain in your folio and continue to grow. However, stopping breaks the compounding chain — try to pause rather than stop if facing cash flow issues.