SIP Calculator
Calculate how your regular monthly investments grow with a Systematic Investment Plan.
For educational purposes only. This calculator does not provide investment advice. Past returns do not predict future results.
📊 Visual Analysis
What This Calculator Does
The SIP Calculator estimates the future value of regular monthly investments using the future value of an annuity formula. Enter your monthly investment amount, an assumed annual return rate, and the investment period to see your projected corpus, total invested amount, and estimated wealth gained. All results are mathematical projections based on a fixed rate — they do not reflect actual market performance.
Formula
Where:
- FV = Future Value (total corpus at the end of the period)
- P = Monthly investment amount
- r = Monthly rate of return = Assumed annual rate ÷ 12 ÷ 100
- n = Total number of monthly investments (years × 12)
This is the future value of an annuity-due formula, which assumes each investment is made at the beginning of the month. The result shows how your cumulative investments grow with compound returns over the specified period.
Input Fields Explained
Monthly Investment ($)
The fixed amount you plan to invest every month. This should be an amount you can consistently set aside from your income. Even small amounts can grow significantly over long periods due to compounding.
Assumed Annual Return (%)
The annual return rate you assume for the investment. This is a modeling input, not a prediction. The calculator converts it to a monthly rate and applies it consistently. Use different values to explore scenarios — no single assumption is guaranteed.
Investment Period (Years)
How long you plan to continue the monthly investments. Longer periods benefit more from compounding. The calculator computes the total number of months (years × 12) for the formula.
Example Calculation
You invest $500 per month at an assumed annual return of 10% for 15 years.
Monthly rate (r) = 10 ÷ 12 ÷ 100 = 0.008333
Total months (n) = 15 × 12 = 180
FV = 500 × ((1.008333)180 − 1) ÷ 0.008333 × 1.008333
FV ≈ $207,928
Total invested = $500 × 180 = $90,000
Wealth gained = $207,928 − $90,000 = $117,928
Assumptions: This example assumes a fixed 10% annual return compounded monthly, with no missed payments, no taxes, and no fees. Actual investment returns fluctuate and may be higher or lower than the assumed rate.
How to Read the Result
The projected corpus at the end of the investment period. This is the sum of all your monthly investments plus the accumulated returns. This is a mathematical projection, not a guaranteed outcome.
The total amount you contribute over the entire period (monthly amount × number of months). This is the money that comes out of your pocket.
The difference between total value and total invested — your estimated returns. This represents the compounding effect over the investment period. The longer you invest, the larger this component usually becomes relative to your contributions.
Common Mistakes
- Assuming a fixed return is guaranteed. Real investments fluctuate. A 10% average annual return does not mean 10% every year — some years will be higher, some lower, and losses are possible. The fixed-rate projection is a simplified model, not a prediction.
- Ignoring inflation. The calculator shows nominal values. If inflation averages 3-4%, the real purchasing power of the projected corpus will be meaningfully lower than the numbers shown.
- Not accounting for taxes and fees. Capital gains taxes, fund management fees, and exit loads all reduce your actual returns. The calculator shows gross projections before these costs.
- Overestimating the return rate. Entering an optimistic return rate (e.g., 15-20%) produces impressive projections but may be unrealistic for long periods. Use conservative and moderate assumptions for more realistic planning.
- Treating the projected value as a target. This calculator shows a mathematical projection, not a financial goal. Actual results depend on market conditions, consistency of investments, and many other factors beyond anyone's control.
When This Calculator Is Useful
- Estimating how regular monthly investments could grow over time
- Comparing different monthly investment amounts or time horizons
- Understanding the impact of compounding on long-term investments
- Exploring different return scenarios (conservative vs optimistic)
- Getting a rough estimate of the corpus needed for a financial goal
Limitations
- Assumes a fixed annual return rate — real investments experience variable returns
- Does not account for inflation, taxes, or investment fees
- Assumes uninterrupted monthly investments for the entire period
- Does not model market downturns, volatility, or sequence-of-returns risk
- The projected corpus is a mathematical output, not a guaranteed or likely outcome
- This calculator is for educational purposes only and does not constitute investment advice
Frequently Asked Questions
What is a SIP?
A Systematic Investment Plan (SIP) is a method of investing a fixed amount at regular intervals (usually monthly) into a mutual fund or other investment. SIPs help build wealth gradually through disciplined investing and benefit from rupee cost averaging and the power of compounding over time.
What return rate should I enter?
There is no single correct rate. The return rate is your personal assumption for modeling only — it is not a forecast or a target return. Run sensitivity checks with several rates you personally consider lower, middle, and higher than your base case, and compare how the projected corpus changes. Do not treat any historical market average as a default "right" input. Past market returns do not predict future performance.
How does compounding work in a SIP?
Each monthly investment begins earning returns from the date it is invested. Over time, the returns themselves generate additional returns. This compounding effect accelerates growth the longer you stay invested. The calculator uses the future value of an annuity formula, which accounts for monthly contributions and compound growth.
Does this calculator account for inflation?
No. The results are in nominal terms. To estimate real (inflation-adjusted) growth, subtract your expected inflation rate from the assumed return rate. For example, if you assume 9% return and 4% inflation, enter 5% to approximate real growth.
What happens if I miss some monthly payments?
This calculator assumes you invest the same amount every month without interruption. If you miss payments, your actual returns will be lower. Some SIPs allow flexible amounts or pause options — check with your fund provider for specifics.
Are taxes considered in the results?
No. The calculator shows gross returns before any capital gains taxes, fund management fees, or other expenses. Your actual returns will be lower after these costs. Tax treatment varies by country and investment type — consult a tax professional for guidance.
🔧 Related Calculators
Educational Disclaimer
This calculator is for educational and informational purposes only. It does not provide investment, financial, tax, or legal advice. The results are based on the inputs and assumptions you provide and may not reflect real market conditions, fees, taxes, or risks. Always do your own research or consult a qualified professional before making financial decisions.