Should I prepay my home loan or invest in SIPs?

You have some money left after expenses, or a bonus has just arrived, and you are torn. Paying down the home loan feels safe and responsible. Investing through SIPs (systematic investment plans, a fixed monthly investment into a mutual fund) feels like what everyone says you should be doing.

Both are reasonable. The right answer depends less on which one "wins" on paper and more on what comes before them, your tax regime, how close you are to retirement, and how you would feel if markets fell.

What should come before either choice?

Neither prepaying nor investing should come first. Two things should:

1. Costlier debt. If you carry a credit card balance or a personal loan, that is the place for spare money. Clearing a loan at 14 percent or a card at 40 percent saves far more than either a home loan prepayment or a SIP is likely to earn. Our guide on what to do when EMIs take half your salary sets out that order.
2. An emergency fund. Money prepaid into a home loan is very hard to get back out. Keep enough in the bank, or in a liquid fund, to cover several months of expenses first.

Only after these two does the home loan versus SIP question really arise.

What does a home loan prepayment actually earn you?

Every rupee you prepay saves interest at your loan rate, with certainty. If your loan is at 8.5 percent, a prepayment is like an investment earning 8.5 percent a year with no risk and no tax on that saving. As of October 2026, home loans at large banks start from about 7.5 percent, and the RBI raised the repo rate to 5.50 percent on 7 October 2026, so many floating rates are being revised upwards.

Illustration: A ₹40 lakh home loan at 8.5% for 20 years has an EMI of ₹34,713. After three years, about ₹37.4 lakh is still outstanding and 204 EMIs remain. If the borrower prepays ₹5 lakh and keeps paying the same EMI, the loan closes after about 154 more EMIs instead of 204, which is 50 EMIs (just over four years) earlier. The interest saved over the remaining life of the loan comes to about ₹12.6 lakh. (Illustrative numbers, not a real client; the rate is an assumption.)

That ₹12.6 lakh is spread over many years, so it is not the same as ₹12.6 lakh today. But it shows why an early prepayment on a long loan is powerful. Whether to take the benefit as a shorter loan or a lower EMI is a separate question, covered in reducing EMI or tenure after prepayment.

How does that compare with investing the same money?

A cleaner comparison is to ask what ₹5 lakh becomes over 10 years each way. Prepaying at 8.5 percent is equivalent to that money growing at 8.5 percent, with no risk. Investing in an equity fund could do better or worse; no return is guaranteed.

Here is the arithmetic for a ₹5 lakh lump sum held 10 years, at three assumed returns. These are illustrations, not forecasts.

The "after tax" column applies the current long-term capital gains tax on equity funds: 12.5 percent on gains above ₹1.25 lakh, assuming everything is sold in one year. Spreading sales over several years can reduce that tax.

Two things stand out. First, the equity route has to earn noticeably more than the loan rate just to break even after tax. Second, the range is wide. Over long periods, equity has historically beaten FD returns but with large swings along the way, and there were stretches of several years when it did not. The prepayment figure has no range at all.

Does the tax benefit change the answer?

It depends on your regime.

• New (default) regime: there is no deduction for interest or principal on a self-occupied home. Your effective loan cost is the full rate, so prepayment saves the full rate.
• Old regime: interest on a self-occupied home loan is deductible up to ₹2 lakh a year, and principal counts within the ₹1.5 lakh deduction (formerly Section 80C, now Section 123 of the Income-tax Act, 2025). If your yearly interest is well above ₹2 lakh, as it is in the illustration (about ₹3.1 lakh in year four), a prepayment does not reduce your deduction until interest falls below the cap. Once interest is below ₹2 lakh, each rupee of interest saved also loses some tax benefit, so the effective saving is lower.

If you are not sure which regime suits you, settle that first; it changes the arithmetic more than people expect.

So how should I decide?

A practical framework, rather than a single rule:

• Lean towards prepaying if you are within 10 to 12 years of retirement and want to be debt-free by then, if your loan rate has risen, if you are in the new tax regime, or if a fall in markets would make you stop your SIPs in panic.
• Lean towards SIPs if you are younger, your loan rate is at the lower end, you already have a solid emergency fund, and you can leave the money invested for 10 years or more through ups and downs.
• Split it if you are in between. Many families send part of each surplus to the loan and part to SIPs. A split also protects you from regret either way.

Whatever you choose, make the decision once and automate it, rather than deciding afresh every month. The choice of specific funds is a product decision that should be checked against your full situation through a SEBI-registered adviser.

What about a bonus or a lump sum?

The same order applies to lump sums: costliest debt, then buffer, then the split between loan and investments. Our guide on what to do with your annual bonus walks through that in more detail. Deciding this order, and the split, before the money arrives is exactly what we map in a first conversation.