SIP Calculator Guide: Calculate Returns on Systematic Investment Plans
A Systematic Investment Plan (SIP) is an investment method where you invest a fixed amount into a mutual fund at regular intervals — typically monthly. Rather than trying to time the market with a lump sum, SIP lets you invest steadily over time, automatically buying more units when prices are low and fewer when prices are high. A SIP calculator helps you project how much your regular investments will grow over a chosen time horizon at an expected rate of return.
The SIP Returns Formula
SIP returns are calculated using the future value of a series of equal payments (an annuity):
FV = P × ((1 + r)^n - 1) / r × (1 + r)
Where:
FV = future value (maturity amount)
P = monthly SIP amount
r = monthly interest rate = annual rate / 12 / 100
n = number of monthly instalments = years × 12
Example: ₹5,000/month for 10 years at 12% annual return
r = 12 / 12 / 100 = 0.01
n = 10 × 12 = 120
FV = 5000 × ((1.01)^120 - 1) / 0.01 × 1.01
FV ≈ ₹11,61,695
Total invested = 5000 × 120 = ₹6,00,000
Wealth gained = ₹11,61,695 - ₹6,00,000 = ₹5,61,695How Monthly Amount and Duration Affect SIP Returns
| Monthly SIP | Duration | Assumed return | Maturity value | Total invested |
|---|---|---|---|---|
| ₹1,000 | 10 years | 12% | ~₹2.32 lakh | ₹1.20 lakh |
| ₹5,000 | 10 years | 12% | ~₹11.6 lakh | ₹6.0 lakh |
| ₹5,000 | 20 years | 12% | ~₹49.9 lakh | ₹12.0 lakh |
| ₹10,000 | 20 years | 12% | ~₹99.9 lakh | ₹24.0 lakh |
| ₹5,000 | 30 years | 12% | ~₹1.76 crore | ₹18.0 lakh |
The dramatic difference between 10 and 30 years shows the power of time in compounding. After 30 years at 12%, the wealth created is nearly 10× the total amount invested.
Rupee-Cost Averaging
SIP investing automatically benefits from rupee-cost averaging (called dollar-cost averaging in the US). When the market falls and NAV (Net Asset Value) drops, your fixed monthly SIP buys more units. When the market is high, it buys fewer units. Over time, the average cost per unit tends to be lower than the average NAV, smoothing out market volatility.
This is fundamentally different from trying to "time the market" — investing a lump sum at what you hope is a market low. Research consistently shows that consistent periodic investment outperforms most market timing attempts for retail investors over long horizons.
Because SIP involves multiple investments at different points in time, simple CAGR (Compounded Annual Growth Rate) does not accurately measure your personal return. XIRR (Extended Internal Rate of Return) accounts for the timing and amount of each investment. When comparing SIP performance to a benchmark, always use XIRR — most mutual fund platforms and SIP calculators can compute it.
SIP vs Lump Sum: Which Is Better?
| Aspect | SIP | Lump Sum |
|---|---|---|
| Entry timing risk | Low (spread over time) | High (invested at one price) |
| Discipline required | Built-in (automatic) | Requires large upfront capital |
| Best market for returns | Volatile or declining markets | Bull markets (rising prices) |
| Suitable for | Salaried investors with regular income | Investors with windfall or bonus |
| Psychological ease | High (smaller regular amounts) | Low (large commitment at once) |
In practice, many investors combine both: starting a SIP for regular income and adding lump sum investments when they receive a bonus, tax refund, or other windfall.
Step-Up SIP (Increasing SIP)
A step-up SIP increases the monthly investment amount each year — typically by 10–15% annually — aligned with salary increments. This significantly increases the final corpus without requiring a large upfront commitment.
Example: Starting at ₹5,000/month with 10% annual step-up over 20 years at 12% return generates approximately ₹1.2 crore, compared to ₹49.9 lakh with a flat ₹5,000 SIP — nearly 2.5× more.
Calculate Your SIP Returns
Enter your monthly investment, expected return rate, and duration to see the projected maturity amount and wealth gained.
Open the SIP CalculatorHow to Use the SIP Calculator
- Open the SIP Calculator
- Enter your monthly SIP amount (in ₹ or your local currency)
- Enter the expected annual return rate (historical large-cap equity funds in India: 10–14%)
- Enter the investment duration in years
- The result shows: total invested, estimated returns, and maturity amount
- Toggle to "Step-up SIP" mode to model annual increment scenarios
- Use the chart to visualise how invested amount and wealth gains grow over each year