Mutual Fund Returns Calculator

Calculator Inputs

Initial Lump Sum

One-time starting investment amount.

Monthly SIP

Monthly contribution added at month end.

Annual SIP Step-Up (%)

Increase your SIP every 12 months.

Investment Period (Years)

Total time horizon for projection.

Expected Annual Return (%)

Expected portfolio growth before costs.

Expense Ratio (%)

Annual cost drag applied monthly.

Exit Load (%)

Redeemed amount charge if applicable.

Exit Load Window (Months)

Exit load applies if horizon stays within this window.

Tax on Gain (%)

Simplified rate on positive gains.

Inflation Rate (%)

Used to estimate real purchasing value.

Example Data Table

This sample shows how a user might fill the calculator before reviewing the projected result set.

Input Field	Example Value	Purpose
Initial Lump Sum	10,000	Starting capital invested immediately.
Monthly SIP	500	Fixed monthly contribution.
Annual SIP Step-Up	5%	Raises SIP contribution every year.
Investment Period	12 years	Defines the projection horizon.
Expected Annual Return	12%	Estimated pre-cost return assumption.
Expense Ratio	1.2%	Annual fund operating cost.
Exit Load and Window	1% within 12 months	Applies early redemption penalty.
Tax and Inflation Rates	10% and 6%	Adjusts final gain and purchasing power.

Formula Used

Monthly Gross Factor = (1 + Annual Return)^(1/12)

Monthly Net Factor = Monthly Gross Factor × (1 - Expense Ratio / 12)

Monthly SIP in Year n = Base SIP × (1 + Step-Up Rate)^n

Gross Portfolio Value = Previous Gross Value × Monthly Gross Factor + Monthly SIP

Net Portfolio Value = Previous Net Value × Monthly Net Factor + Monthly SIP

Exit Load = Net Value Before Tax × Exit Load Rate

Taxable Gain = max(Value After Exit Load - Total Invested, 0)

Net Maturity Value = Value After Exit Load - Tax on Gain

Real Future Value = Net Maturity Value ÷ (1 + Inflation Rate)^Years

Estimated XIRR solves: Σ Cash Flow ÷ (1 + r)^time = 0

This calculator uses a month-by-month simulation. Lump sum grows from day one. SIP contributions are added at the end of each month. Expense ratio reduces growth monthly. Tax and exit load are simplified estimates and can differ by scheme, holding period, and local rules.

How to Use This Calculator

Enter your starting lump sum, if any.
Add the monthly SIP amount you plan to invest.
Enter the annual SIP step-up percentage to model growing contributions.
Set the investment period in years.
Input your expected annual return estimate.
Include expense ratio, exit load, and tax assumptions.
Add inflation rate to view purchasing-power-adjusted value.
Press Calculate Returns to see summary metrics above the form.
Review the chart and yearly table for trend analysis.
Use the CSV or PDF buttons to export the calculated output.

Frequently Asked Questions

1. What does this calculator estimate?

It estimates mutual fund growth using lump sum, SIP, annual step-up, expense ratio, exit load, tax, and inflation. It also shows projected maturity, profit, XIRR, and a yearly growth path.

2. Why is expense ratio included?

Expense ratio reduces the effective growth rate of the fund. Even small annual costs can meaningfully lower long-term wealth, especially over longer horizons with rising contributions.

3. What is the difference between gross and net value?

Gross value reflects expected portfolio growth before ongoing costs. Net value reflects growth after expense drag but before exit load and tax. This helps you see how fees affect final wealth.

4. What does XIRR mean here?

XIRR is an annualized return estimate based on the timing of your cash flows. It is more informative than simple CAGR when contributions happen monthly instead of all at once.

5. How is inflation used?

Inflation adjusts the final maturity value into today’s purchasing power. This shows what your future amount may actually feel like in real terms, not just nominal currency terms.

6. Does the exit load always apply?

No. In this calculator, exit load applies only when the selected investment horizon remains within the specified exit-load window. Many real funds use more detailed contribution-specific redemption rules.

7. Are taxes calculated exactly like a real statement?

No. The tax section is a simplified estimate using one gain rate. Real taxation may depend on fund type, holding period, exemptions, jurisdiction, and realized redemption details.

8. Can I use this for comparing two funds?

Yes. Run the calculator twice with different return, fee, and tax assumptions. Comparing net maturity, XIRR, real value, and yearly projection can help highlight meaningful long-term differences.