1. What is SIP?
A Systematic Investment Plan (SIP) lets you invest a fixed rupee amount into a mutual fund every month automatically. Instead of trying to time the market, you invest consistently — buying more units when the NAV is low and fewer when it is high. Over years, this averages out your purchase cost, a principle known as rupee cost averaging.
SIP is not a product itself — it is a method. You can run a SIP in equity funds, debt funds, hybrid funds, or index funds. The return you earn depends entirely on the fund you choose, not on the SIP mechanism.
2. The SIP Return Formula
The future value of a SIP is calculated using the future value of an annuity formula:
FV = P × [((1 + r)n − 1) / r] × (1 + r)
- P = Monthly SIP amount (₹)
- r = Monthly return rate = Annual return rate ÷ 12 ÷ 100
- n = Total number of months (years × 12)
Example: ₹5,000/month for 20 years at 12% annual return:
- r = 12 ÷ 12 ÷ 100 = 0.01
- n = 20 × 12 = 240
- FV = 5000 × [((1.01)240 − 1) / 0.01] × 1.01
- FV ≈ ₹49.96 lakhs — on a total investment of just ₹12 lakhs
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Open SIP Calculator →3. SIP Return Table: ₹1,000 to ₹20,000/Month at 12%
Assuming a 12% annual return (approximate historical average for diversified equity mutual funds in India), here is what different monthly SIP amounts grow to:
| Monthly SIP | 5 Years | 10 Years | 15 Years | 20 Years |
|---|---|---|---|---|
| ₹1,000 | ₹82,486 | ₹2.32 L | ₹5.02 L | ₹9.99 L |
| ₹2,000 | ₹1.65 L | ₹4.65 L | ₹10.04 L | ₹19.98 L |
| ₹5,000 | ₹4.12 L | ₹11.62 L | ₹25.09 L | ₹49.96 L |
| ₹10,000 | ₹8.25 L | ₹23.23 L | ₹50.18 L | ₹99.92 L |
| ₹15,000 | ₹12.37 L | ₹34.85 L | ₹75.27 L | ₹1.50 Cr |
| ₹20,000 | ₹16.50 L | ₹46.46 L | ₹1.00 Cr | ₹1.99 Cr |
* Assumes consistent 12% p.a. return. Actual returns vary; past performance does not guarantee future results.
4. SIP vs Lump Sum: Which Wins?
This is the most common SIP question. The answer depends on market timing — which no one can reliably predict.
- Lump sum wins in a steadily rising market — all money is deployed early and compounds longer.
- SIP wins (or ties) in volatile or falling markets — rupee cost averaging lowers your average purchase cost.
For most salaried individuals in India, SIP is the practical choice: you invest what you earn each month rather than needing a large amount upfront. If you receive a large sum (bonus, inheritance), a lump sum into a fund makes sense — or split it into 6–12 monthly instalments to reduce timing risk.
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Compare SIP vs Lump Sum →5. The Impact of Starting Early: 5 Years Makes a Massive Difference
Compounding rewards patience more than any other factor. Consider two investors, both investing ₹5,000/month at 12%:
| Investor | Starts at | Stops at | Total Invested | Corpus at 60 |
|---|---|---|---|---|
| Priya | Age 25 | Age 60 (35 years) | ₹21 L | ₹3.24 Cr |
| Rahul | Age 30 | Age 60 (30 years) | ₹18 L | ₹1.76 Cr |
Priya invests just ₹3 lakh more than Rahul but ends up with nearly ₹1.5 Cr more. Those 5 extra years at the start are worth far more than increasing the SIP amount later.
6. What Return Rate Should You Use?
This is the question most financial blogs avoid answering directly. Here is a practical framework:
- Conservative estimate (8–10%): Use for retirement planning. Assume large-cap index funds or balanced funds.
- Moderate estimate (12%): Reasonable for diversified equity funds with a 10+ year horizon. This is the most commonly cited historical average.
- Optimistic estimate (15%): Possible with mid/small-cap funds over long periods — but carries higher volatility and drawdown risk.
For goal-based planning (child education, home down payment), always model at 8–10% to avoid shortfalls. Use 12%+ only when the goal is flexible or far-off.
7. Common SIP Mistakes to Avoid
- Stopping SIP during market falls — This is the worst thing you can do. Market dips are when SIP buys the most units at the cheapest price. Stopping locks in losses and misses the recovery.
- Choosing funds based on recent 1-year returns — Look at 5-year and 10-year rolling returns, not just the latest year.
- Not increasing SIP with income growth — A step-up SIP of even 10% per year can dramatically increase the final corpus.
- Redeeming before 1 year — Equity SIP gains within 1 year attract 20% short-term capital gains tax. Hold for 1+ year for the 12.5% LTCG rate (above ₹1.25 lakh annual gains).
- Too many funds — 2–3 well-chosen funds are better than 10 mediocre ones. Over-diversification in mutual funds adds no real benefit.