SIP Calculator Guide: How SIP Calculations Work

What is a SIP?

A Systematic Investment Plan (SIP) lets you invest a fixed amount every month in a mutual fund. Instead of timing the market with a lump sum, SIP harnesses rupee cost averaging — you buy more units when prices are low and fewer when prices are high.

How the SIP Calculator Works

The formula for SIP maturity value is:

M = P × [(1 + r)^n - 1] / r × (1 + r)

Where:

• M = Maturity amount
• P = Monthly SIP amount
• r = Monthly interest rate (annual rate ÷ 12)
• n = Number of months

Example: ₹5,000/month for 15 years at 12% p.a.

• Total invested: ₹5,000 × 180 = ₹9 lakh
• Maturity value: ≈ ₹25.2 lakh
• Wealth gained: ≈ ₹16.2 lakh (1.8× your investment!)

The Power of Starting Early

Monthly SIP	Start Age	Tenure	Maturity at 60 (@12%)
₹5,000	25	35 years	₹2.67 crore
₹5,000	30	30 years	₹1.76 crore
₹5,000	35	25 years	₹94.9 lakh
₹5,000	40	20 years	₹49.9 lakh

Starting 5 years earlier can nearly double your corpus!

Step-Up SIP: The Game Changer

A Step-Up SIP increases your SIP amount by a percentage each year. If your salary grows 10% annually, increasing your SIP by 10% each year dramatically boosts your final corpus.

₹5,000/month with 10% annual step-up for 20 years at 12% = ₹1.07 crore (vs ₹50 lakh without step-up)

Which Mutual Funds for SIP?

• Large Cap Index Funds – Nifty 50, Sensex; lowest cost, market returns
• Flexi Cap Funds – Mix of large, mid, small cap; actively managed
• ELSS – Tax saving, 3-year lock-in, 80C benefit
• Small Cap Funds – Higher risk, higher potential returns, for long horizons only

SIP Tips

1. Automate your SIP on your salary credit date
2. Never stop SIP during market falls — this is when you gain the most units
3. Increase SIP by at least the rate of inflation each year
4. Diversify across 2–3 funds, not 10+
5. Review annually, not monthly

Try our SIP Calculator with step-up feature to plan your investment journey.