What a ₹10,000/month SIP for 15 years actually means
You commit ₹10,000 every month into an equity mutual fund or index fund for 15 years straight. By the end you'll have personally contributed ₹18,00,000. At a 12% expected long-term return, the compounding effect lifts that to about ₹50,45,760 — meaning roughly ₹32,45,760 is gain that you didn't have to work for. That's the entire point of a SIP: discipline plus time, multiplied.
Who this plan is suitable for
A ₹10,000/month SIP for 15 years is best suited for mid-career investors with a clear long-term goal — building a retirement corpus, a future home down-payment, or a 15-year wealth target.
Expected outcomes over time
In the first 3–5 years, your portfolio will look almost identical to your invested amount — that's normal, compounding hasn't kicked in yet. Around year 7–10, gains start matching contributions. By year 11, gains will dominate: most of the value sitting in your account is money the market made for you, not money you put in. In this specific scenario, about 65% of all gains arrive in the final 5 years alone.
The impact of inflation
₹50,45,760 sounds enormous, but inflation quietly chips away at its purchasing power. Assuming a long-term 6% inflation rate (roughly India's historical average), the real-world value of your final corpus is closer to ₹21,05,419 in today's money. Always plan in real terms, not nominal — it's the difference between "I'll be rich" and "I'll have what I actually need."
Recommendation: turn this into a step-up SIP
The single biggest upgrade to this plan is to step up your SIP by 10% every year — matched to your annual salary hike, so it never feels like a sacrifice. Doing that alone would push the corpus to about ₹86,83,849 — an extra ₹36,38,089 for the same starting commitment. Most fund houses support automatic step-up; turn it on once and forget about it.