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What Is SIP? A Beginner's Guide to Systematic Investment Plans

SIP lets you invest a fixed amount in mutual funds every month. Here is how compounding, rupee-cost averaging and step-ups actually work.

By LetsInvest Research Desk · Updated 13 Sept 2026

A Systematic Investment Plan (SIP) invests a fixed sum — say ₹5,000 — into a mutual fund every month automatically. Two forces do the heavy lifting: rupee-cost averaging (you buy more units when markets fall) and compounding over years.

How much can a SIP grow?

₹10,000/month for 15 years at 12% p.a. compounds to roughly ₹50 lakh, of which only ₹18 lakh is your contribution. Try the numbers yourself in our SIP calculator.

Three rules that matter

  • Never stop SIPs in a crash — that is when averaging helps most.
  • Step up the amount 10% yearly as income grows.
  • Match fund risk to horizon: equity for 7+ years, hybrid/debt for shorter goals.

Educational content, not financial advice.

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