If you put ₹5,000 into a Systematic Investment Plan (SIP) at age 25 and let it run untouched for 30 years at a 12% CAGR, you would end up with roughly ₹1.76 crore. If you stepped that SIP up by 10% every year — increasing your contribution as your salary grew — the same starting amount becomes ₹4.4 crore. This is the boring, almost unfair math of long-term compounding, and it is the single most powerful wealth-building tool available to a salaried Indian investor.
This article walks through the SIP formula in plain language, models how ₹5,000/month grows across different time horizons and starting ages, compares step-up SIPs to flat SIPs, and shows the inflation-adjusted "real" purchasing power of that final corpus. Use these numbers to set realistic expectations before opening a fund — and check the live calculator at OnePaisa SIP Calculator for your own scenarios.
The SIP Formula — Explained Simply
The compound formula behind every SIP calculator is:
FV = P × [((1 + r)^n - 1) / r] × (1 + r)
Where:
- FV = Future Value (final corpus)
- P = Monthly SIP amount (e.g., ₹5,000)
- r = Monthly rate of return (annual rate / 12)
- n = Total number of months
Plug in P = 5000, annual rate = 12% (so r = 0.01), n = 360 (30 years), and you get FV ≈ ₹1,76,49,569 — call it ₹1.76 crore. The intuition: each ₹5,000 instalment is invested at a different point in time, each instalment compounds for the remaining months, and the formula sums them all up.
₹5,000 Monthly SIP — Growth at 12% CAGR
| Years | Total Invested | Final Corpus | Wealth Multiple | Wealth Gained |
|---|---|---|---|---|
| 5 | ₹3.0 L | ₹4.12 L | 1.4x | ₹1.12 L |
| 10 | ₹6.0 L | ₹11.62 L | 1.9x | ₹5.62 L |
| 15 | ₹9.0 L | ₹25.23 L | 2.8x | ₹16.23 L |
| 20 | ₹12.0 L | ₹49.96 L | 4.2x | ₹37.96 L |
| 25 | ₹15.0 L | ₹94.88 L | 6.3x | ₹79.88 L |
| 30 | ₹18.0 L | ₹1.76 Cr | 9.8x | ₹1.58 Cr |
Notice how non-linear the growth is. In the first 10 years you nearly double your money. In years 20-30, that same ₹5K monthly contribution adds ₹1.26 crore in pure compounded growth — more than 7x what was added in years 0-10. This is why time in the market beats timing the market.
Step-Up SIP vs Flat SIP — The Real Game Changer
Most salaried investors get a 7-12% raise every year, but their SIP amount stays frozen at whatever they started with. A step-up SIP simply increases the contribution by a fixed percentage annually — say 10% — to keep pace with rising income. Below is what that does to a ₹5,000 starting SIP:
| Years | Flat ₹5K SIP Corpus | 10% Step-Up SIP Corpus | Extra from Step-Up |
|---|---|---|---|
| 10 | ₹11.62 L | ₹16.59 L | +₹4.97 L |
| 20 | ₹49.96 L | ₹1.10 Cr | +₹60 L |
| 30 | ₹1.76 Cr | ₹4.40 Cr | +₹2.64 Cr |
The step-up version doubles the 10-year corpus, more than doubles the 20-year corpus, and produces 2.5x the 30-year corpus. The "cost" is that in year 30 your monthly SIP has grown to about ₹78,000 — but by then your salary has grown roughly 17x too (compounded at 10%), so the bite is the same as ₹5,000 was on day one.
Impact of Starting Age — The Most Important Variable
The single biggest determinant of your final corpus is when you start. Below is the same ₹5,000 monthly SIP at 12% CAGR, run from different starting ages until age 60:
| Start Age | Years to 60 | Total Invested | Corpus at 60 |
|---|---|---|---|
| 25 | 35 | ₹21.0 L | ₹3.24 Cr |
| 30 | 30 | ₹18.0 L | ₹1.76 Cr |
| 35 | 25 | ₹15.0 L | ₹94.88 L |
| 40 | 20 | ₹12.0 L | ₹49.96 L |
| 45 | 15 | ₹9.0 L | ₹25.23 L |
Starting at 25 vs 35 — a 10-year delay — costs you ₹2.29 crore. Starting at 25 vs 45 costs you nearly ₹3 crore on the same monthly contribution. The lesson is brutal but true: every year you delay starting an SIP costs roughly 12-15% of your final retirement corpus.
Real Returns — What Inflation Does to Your ₹1.76 Crore
₹1.76 crore in 30 years sounds like a lot. But what is its purchasing power in today's rupees? At 6% average inflation (India's long-term average), here is what each future corpus is worth in today's money:
| Years | Nominal Corpus | Real Corpus (in today's ₹) |
|---|---|---|
| 10 | ₹11.62 L | ₹6.49 L |
| 20 | ₹49.96 L | ₹15.58 L |
| 30 | ₹1.76 Cr | ₹30.66 L |
The 30-year ₹1.76 crore is worth about ₹30.7 lakh in today's purchasing power. Still a meaningful amount — but nowhere near the headline number. This is why retirement planners assume real returns of 6-7% (12% nominal minus 6% inflation), not the headline nominal rate.
To genuinely retire on equity SIPs, most Indian planners now recommend SIP amounts that target ₹3-5 crore in real terms, which usually means ₹15-25K monthly with annual step-up — not just ₹5,000.
Why 12% Is a Realistic Long-Term Assumption
Some bloggers throw around 15-18% return numbers for SIP projections — usually based on cherry-picked 5-year windows. The honest, multi-decade Indian equity return is closer to 12-13% (Nifty 50 TRI 20-year CAGR is roughly 12.5%; well-managed flexi caps have done 14-16% over the same period).
For SIP calculator inputs, use these benchmarks:
- Conservative: 10% — for hybrid funds or as a stress-test
- Realistic: 12% — index and large cap equity over 20+ years
- Optimistic: 14% — well-chosen active flexi cap or mid cap funds
- Unrealistic: 18%+ — only seen in cherry-picked windows; do not plan around this
Pick funds for your SIP from the curated list at Best SIP Plans for 2026 and the equity funds shelf.
Worked Scenarios — Pick Yours
"I'm 28, just want a comfortable retirement at 60"
SIP ₹10,000/month, 10% step-up, 12% CAGR, 32 years → ₹6.5 crore nominal (~₹95 L real). This is enough for most middle-class retirements assuming a paid-off home.
"I'm 35, want my kid's education in 15 years (~₹50 L target)"
SIP ₹14,000/month, no step-up, 12% CAGR, 15 years → ₹70 L nominal (~₹29 L real). Bump to ₹20K monthly to hit a real ₹50 L target.
"I'm 45, can save aggressively for 15 years before retirement"
SIP ₹40,000/month, 8% step-up, 12% CAGR, 15 years → ₹2.6 crore nominal (~₹1.08 Cr real). Pair with EPF and NPS for a complete retirement.
Tax on SIP Withdrawals
Per the Budget 2024/2025 framework retained in the latest budget:
- Equity funds held over 12 months: 12.5% LTCG on gains above ₹1.25 L per financial year
- Equity funds held under 12 months: 20% STCG on full gain
- Debt funds: Slab rate (no indexation post Apr 2023)
For a 30-year ₹5K SIP, redeem in tranches across multiple financial years to use the ₹1.25 L LTCG exemption multiple times — this can save 5-8% of the tax bill.
Key Takeaway
₹5,000 a month for 30 years at 12% becomes ₹1.76 crore. With a 10% annual step-up, it becomes ₹4.4 crore. The single most important variable is when you start — every 5-year delay nearly halves your retirement corpus. Start whatever SIP you can afford today, even if it is only ₹500, and step it up every year. Use the OnePaisa SIP Calculator to model your own scenario, then pick funds that pass our 7-point checklist.
FAQs
What is the minimum SIP amount in India in 2026?
₹100 per month with most fund houses (HDFC, ICICI Pru, Kotak, Nippon India, UTI). Some smaller AMCs and ELSS schemes have ₹500 minimums. Start with whatever you can — even ₹500/month for 30 years at 12% is ₹17.6 lakh.
Is 12% return realistic for an SIP in 2026?
Yes, over 20+ year horizons. India's nominal GDP growth is projected at 9-11% for the next decade, and equity historically delivers a 2-3% premium over nominal GDP. Short-term (3-5 year) returns can be wildly higher or lower; do not extrapolate from any single window.
Should I increase my SIP every year?
Absolutely yes — by at least 10% annually. The math doubles or triples your final corpus on the same starting amount. Most AMCs offer "Step-Up SIP" or "SIP Top-Up" features that automate this; enable them when setting up the SIP.
What happens to my SIP if the market crashes?
Your SIP keeps buying units at lower NAVs — which is exactly what you want. Investors who continued SIPs through the 2008 (-55%) and March 2020 (-35%) crashes saw their average cost drop sharply and rode the recovery to outsized gains. Stopping SIPs in a crash is the single biggest mistake retail investors make.
Can I withdraw my SIP money any time?
Yes for most equity and debt funds (subject to exit load — usually 1% if redeemed within 1 year). The exception is ELSS funds, which have a hard 3-year lock-in per instalment. For long-term goals, it is best to mentally treat the SIP as locked in until your goal year regardless of liquidity.
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Insurance & Mutual Funds Editor, OnePaisa Editorial
Sandeep writes on insurance and mutual funds for OnePaisa — term and health cover, policy wordings and exclusions, and fund categories, costs and risk labels. Premiums, sums insured and waiting periods come from insurer policy documents and brochures; fund data comes from SEBI category definitions and scheme documents, and past returns are never presented as a forecast. His guides explain how a product works and what it excludes — they are not advice.
Work published under this byline follows OnePaisa’s editorial standards — how our guides are researched, fact-checked against primary sources, and corrected.