SIP Calculator: How Much Will ₹5,000 Per Month Become in 10, 15 & 20 Years?
A worked example of a monthly SIP compounding over three time horizons — and why the extra years matter more than you'd expect.
At an assumed 12% expected annual return, a ₹5,000/month SIP grows to roughly ₹11.6 lakh in 10 years, ₹25.2 lakh in 15 years, and ₹50 lakh in 20 years. These are projections based on an assumed rate, not guaranteed returns.
Model your own amount, rate, and duration in our SIP calculator.
A Systematic Investment Plan (SIP) is a fixed amount invested into a mutual fund on a regular schedule, usually monthly. The question "how much will my SIP become" has a precise mathematical answer once you fix an expected rate of return — the catch is that the answer isn't proportional to time the way many people assume; it accelerates.
The Formula
Worked Example: ₹5,000/Month at 12% Expected Return
| Duration | Total invested | Estimated maturity value | Estimated returns |
|---|---|---|---|
| 10 years | ₹6,00,000 | ≈ ₹11,60,000 | ≈ ₹5,60,000 |
| 15 years | ₹9,00,000 | ≈ ₹25,20,000 | ≈ ₹16,20,000 |
| 20 years | ₹12,00,000 | ≈ ₹50,00,000 | ≈ ₹38,00,000 |
Notice the jump: going from 15 to 20 years — just 5 more years, and only ₹3,00,000 more invested — very roughly doubles the maturity value. That's not a coincidence; it's compounding accelerating as the base it's compounding on (both the invested amount and the returns already earned) keeps growing.
Worth knowing: 12% is a commonly used illustrative assumption based on long-run historical equity market averages, not a guaranteed or risk-free rate. Actual mutual fund returns fluctuate year to year, including negative years — treat any SIP projection as an estimate, not a promise.
Why Starting Early Beats Investing More Later
Compare two investors: one starts a ₹5,000/month SIP at age 25 and stops at 45 (20 years, then lets it sit). Another starts the same ₹5,000/month SIP at age 35 and continues to 55 (20 years of contributions, but a decade later in life). Even though both invest for the same 20-year window, the first investor's money has more total years to compound before any given "check the balance" date — which is why financial advice so consistently emphasizes starting early over waiting to invest a larger amount.
SIP vs. Lump Sum
| SIP | Lump sum | |
|---|---|---|
| Entry timing risk | Spread across many purchase points | Concentrated at one point |
| Discipline | Automatic, regular | One decision, then done |
| Compounding start | Later installments compound for less time | The full amount compounds from day one |
Neither is universally "better" — a SIP suits money you're earning and setting aside over time, while a lump sum suits money you already have sitting idle. Both ultimately depend on the same compounding math.
Step-Up SIP — Increasing Your Investment Every Year
A step-up (or "top-up") SIP increases the monthly investment by a fixed percentage each year, usually to match rising income, rather than keeping it flat for the whole period. Because more money is invested progressively earlier — while still compounding for a long time — the effect on the final maturity value is larger than a flat SIP of the same total contribution.
Example: The same ₹5,000/month SIP at 12% over 20 years reached roughly ₹50 lakh flat. Stepping the contribution up by just 10% every year (₹5,000 in year 1, ₹5,500 in year 2, and so on) pushes the same 20-year projection to somewhere in the ₹75-85 lakh range, despite starting from an identical base amount — because later, larger contributions still get a decade or more to compound.
SIP During Market Downturns
A common and costly mistake is pausing or stopping a SIP when markets fall. Since a SIP buys more fund units when prices are low, a downturn period is exactly when each fixed contribution goes furthest — pausing during a dip means missing the very months that historically contribute the most to long-run average purchase price. Staying invested through volatility, rather than trying to time an exit and re-entry, is the entire point of rupee-cost averaging in the first place.
Worth knowing: This doesn't mean every SIP is guaranteed to recover — it means that stopping contributions specifically because of a downturn tends to work against the mechanism that makes SIPs effective over long horizons. It's not investment advice for your specific situation, just how the mechanism itself behaves.
A Note on Taxes
SIP returns are typically taxable, but exactly how — and at what rate — depends heavily on the country, the type of fund, and how long each individual installment was held before being withdrawn (since each month's contribution has its own holding period, not just the SIP as a whole). This article doesn't cover tax specifics because they vary too much by jurisdiction and fund type to generalize safely; check your country's current tax rules or a qualified tax advisor before assuming a specific after-tax outcome.
Frequently Asked Questions
How much will ₹5,000 per month become in a SIP?
At an assumed 12% expected annual return, a ₹5,000/month SIP grows to roughly ₹11.6 lakh in 10 years, ₹25.2 lakh in 15 years, and ₹50 lakh in 20 years. These are projections based on an assumed rate, not guaranteed outcomes.
Why does the SIP value grow so much faster between 15 and 20 years than between 10 and 15?
Compounding accelerates over time — the returns generated in later years are earned on a much larger base (both the money invested and the returns already accumulated), so each additional 5-year block adds more than the last.
Is 12% a guaranteed return for a SIP?
No — 12% is a commonly used illustrative assumption based on long-run historical equity market averages, not a guarantee. Actual mutual fund returns vary year to year and can be negative in some years.
Does starting a SIP earlier matter more than investing a larger amount later?
Often, yes — money invested earlier has more time to compound, so a smaller amount started years earlier can outgrow a larger amount started later, purely from the extra compounding time.
What's the SIP formula?
FV = P × [((1+i)^n − 1) / i] × (1+i), where P is the monthly investment, i is the monthly expected return rate, and n is the total number of monthly installments.
