Should I Prepay My Home Loan or Invest in a SIP?

Should extra monthly cash reduce the EMI, shorten the loan, or go into a mutual-fund SIP?

Compare three paths using the same monthly budget, fixed loan rate and time horizon. Results are calculated in your browser and displayed in Indian rupees.

Outstanding home-loan principal (₹)

Annual loan interest rate (%)

Remaining loan term (months)

Extra monthly budget beyond scheduled EMI (₹)

Comparison horizon (months)

Lower hypothetical annual SIP return (%)

Middle hypothetical annual SIP return (%)

Higher hypothetical annual SIP return (%)

Pre-tax scenario only. No Indian tax deductions or tax on mutual-fund gains are modeled. SIP return inputs are hypothetical scenarios, not forecasts or guarantees. Loan interest avoided is a modeled contractual-cost comparison under the fixed-rate assumption, not investment income.

Enter assumptions to compare the strategies.

Prepared by the Wealthton Editorial Team under our editorial policy.

How the three strategies are compared

The model starts with the outstanding principal, annual rate and remaining term. It derives the scheduled EMI using the monthly reducing-balance convention already used by Wealthton’s EMI Calculator. The comparison budget is that EMI plus the extra monthly amount you enter.

Prepay and reduce EMI: make the scheduled payment, then apply the extra budget to principal at month-end. Recalculate the required EMI for the remaining original term for the following month. Invest any portion of the monthly budget not used for the EMI or prepayment.
Prepay and reduce tenure: keep the original EMI, apply the extra to principal at month-end, and invest the remaining monthly budget after the loan is paid off.
Invest in a SIP: pay the original EMI and invest the extra budget at month-end. If the loan is paid off, invest the full monthly budget thereafter.

Each month, interest is calculated on the opening balance. The scheduled EMI is paid next, then any prepayment is applied to the remaining balance. The payment is capped at the amount owed. Monthly SIP contributions are added at month-end, so they do not earn a return during that same month. The annual SIP assumption is converted to an effective monthly rate: (1 + annual return)^(1/12) − 1.

How to interpret interest and terminal position

“Modeled interest avoided” compares interest paid with the no-prepayment baseline over the same horizon. It is not added to investment value or counted as a separate asset. Terminal position is investment value plus any uninvested cash minus the remaining loan balance. It excludes the home’s value and home equity, so it is not total household net worth.

Assumptions and limitations

The model assumes the entered loan rate stays fixed for the full comparison, monthly payments, no fees, no missed payments and monthly EMI recalculation in the EMI-reduction strategy. A lender may use different recast rules, limits or timing, and floating-rate loans can change. Confirm prepayment terms with your lender. The model is pre-tax: it does not estimate deductions under old or new Indian tax regimes, Section 24(b), Section 80C, or tax on mutual-fund gains. It excludes fund expenses, inflation and market volatility beyond the return scenarios.

For a single-purpose EMI estimate, use the India EMI Calculator; for a SIP projection, use the SIP Calculator. This decision page combines those questions with an equal monthly budget and loan balance tracking.

This is an educational scenario comparison, not personalized financial, tax, or investment advice. Check your loan statement, lender prepayment policy, tax position and investment risks before acting. See our disclosures or contact us to report an issue.