Should you use ₹5 lakh extra cash to prepay your home loan or invest in an SIP?

If you have ₹5 lakh surplus, the choice between prepaying a 9% home loan and investing in a 12% equity SIP is genuinely close once tax effects are factored in. Prepayment saves the loan rate (effectively a guaranteed return). SIPs offer potentially higher returns but with volatility and post-tax adjustments.

Under the old tax regime with full home loan deduction usage (₹2 lakh interest under Section 22(1)(b), ₹1.5 lakh principal under 80C), the effective post-tax cost of a 9% home loan drops to about 6-7% (the rate converter will express any of these annual rates on a monthly basis). Versus a 12% equity SIP that nets to roughly 10-11% after LTCG tax — SIP still wins, but only by 3-4% per annum, and that gap can be wiped out by a single bad year of equity returns.

Under the new tax regime (no home loan deduction available), the effective home loan cost stays at the full 9% — and prepayment becomes substantially more attractive. The pragmatic answer for most Indians is a split: prepay 40-50% of the surplus, invest the rest. You get partial debt reduction, partial equity exposure, and you sleep better.

One detail changes this calculation more than the return assumption does, and most published advice predates it. The comparison above is usually framed around the old regime, where prepaying reduced the interest you could deduct under section 22(1)(b) and so delivered less than the headline loan rate. Under the new regime — now the default — there is no section 22(1)(b) deduction on a self-occupied property at all. Prepayment is therefore worth its full rate, not a reduced post-tax one. That shifts the arithmetic towards prepaying for a large and growing share of borrowers.

Prepaying a floating-rate loan costs you nothing to do. RBI does not permit foreclosure or prepayment charges on floating-rate term loans to individual borrowers, so there is no penalty to weigh against the interest saved. A fixed-rate loan may attract a charge, which is worth checking in your sanction letter before you act.

This page works one case: a one-time ₹5 lakh against a ₹50 lakh home loan. To compare a recurring yearly surplus instead, with the differences, tax treatment and decision steps set out side by side, use the Home Loan Prepayment vs SIP comparison.

The loan. Interest on a self-occupied property is deductible up to ₹2 lakh under section 22(1)(b), and principal repayment falls within the ₹1.5 lakh limit under 80C — but both are available only under the old regime. If the property is let out, the interest deduction survives under the new regime too, though the loss you may set off against other income is capped at ₹2 lakh a year. That distinction matters and is frequently stated too bluntly elsewhere.

The investment. Equity fund gains are taxed only when you redeem. Units held twelve months or more are taxed under section 198 at 12.5% on the amount above ₹1.25 lakh of such gains in a financial year; below twelve months, section 196 applies 20% with no threshold. So a 12% gross return is not a 12% net one, and the gap widens the more you redeem in any single year.

Compare like with like. Prepayment returns a guaranteed, tax-free saving equal to your loan rate — there is no tax on money you did not have to pay. An SIP returns an uncertain, taxable gain. Setting 12% against 9% without adjusting for either fact overstates the SIP’s advantage considerably.

Which regime are you on? On the new regime with a self-occupied property you get no interest deduction, so prepayment is worth the full loan rate. That single question moves the answer more than any return forecast.

Is the loan floating or fixed? Floating carries no prepayment charge for individual borrowers. Fixed may. Check before assuming prepayment is free.

How long is left on the loan? Prepaying early, when the EMI is mostly interest, saves far more than prepaying in the final years when it is mostly principal. The same ₹5 lakh applied in year 3 and year 15 produce very different outcomes.

Do you have an emergency fund? Money put into a prepayment is gone — you cannot draw it back out. Money in a mutual fund can be redeemed in two days. Do not prepay your way into having no accessible savings.

How would a 30% fall feel? If the honest answer is that you would stop the SIP, the guaranteed saving from prepayment is worth more to you than a higher expected return you would not stay invested to collect.