Prepay Your Home Loan or Invest in Mutual Funds?

01"I have ₹5 lakh spare — prepay my home loan or invest it?"

The question comes up every time a bonus lands, an FD (fixed deposit) matures or a raise frees up ₹10,000 a month. It is louder this autumn: the RBI raised its repo rate on 7 October 2026, and many floating-rate home-loan borrowers are seeing their rate creep up again. A higher loan rate makes prepaying more attractive — but mutual fund SIPs (systematic investment plans) are also at record levels, and the long-run returns of equity funds look tempting.

Both choices can be right. Prepaying — paying part of the loan early, on top of your EMIs — gives a guaranteed saving equal to your loan's interest rate. Investing might earn more, but the return is uncertain, it is reduced by fund costs and tax, and it can be negative for several years in a row.

02The example loan and the assumptions

Every figure in this post uses the same loan and the same assumptions, so you can compare the two choices fairly. Change them to your own in the calculators linked below.

On this loan, ₹29,167 of your first ₹39,978 EMI is interest — 73 %. That is why money paid early in a loan goes so far: it stops interest being charged on that amount for every remaining month. Our post "Your Home Loan EMI, Explained" shows how the interest share falls over the years.

03Option 1: prepay ₹5 lakh — what it saves

When you prepay, the ₹5 lakh comes straight off the ₹40 lakh you owe. The bank then lets you either reduce the tenure (keep paying ₹39,978 and finish sooner) or reduce the EMI (pay less each month for the same 15 years). The Prepayment Optimizer works out both:

How to read it. Keeping the EMI at ₹39,978 clears the loan in 141 months instead of 180 — 39 months, or 3 years 3 months, sooner — and saves ₹10,99,048 of interest. Lowering the EMI to ₹34,981 frees ₹4,997 a month but saves only ₹3,99,494, because you still pay interest for the full 15 years. Many banks lower the EMI by default, so ask in writing for a shorter tenure if you can afford the current EMI.

Now enter your own outstanding principal (it's on your loan statement), your current rate, your EMI and the remaining years, and the amount you could prepay.

04Option 2: invest ₹5 lakh — what you might keep after costs, tax and inflation

Now put the same ₹5 lakh into an equity mutual fund for the 15 years the loan has left. The headline figure is not what you keep. Each step below takes something away:

The tax step. The gain is ₹18,92,295. The first ₹1.25 lakh of long-term equity gains in a year is tax-free; the rest is taxed at 12.5 % plus 4 % cess, which is ₹2,29,748 if you sell it all in one year. That leaves ₹21,62,546 — a return of 10.26 % a year. The inflation step shows what that money buys in today's prices: ₹9,68,676, because prices more than double (2.23×) over 15 years at 5.5 %.

05Home loan prepayment vs SIP: a fair comparison

Comparing ₹10,99,048 of interest saved with a fund worth ₹21,62,546 is comparing different things. A fair test asks: after 15 years, when both routes are debt-free, which one leaves you with more?

1. Prepay route. Prepay ₹5 lakh, keep the EMI and clear the loan after 141 months. For the last 39 months, invest the ₹39,978 you no longer pay as an EMI, in the same fund.
2. Invest route. Keep the loan for the full 180 months and invest ₹5 lakh in the fund today.

Both routes pay the same ₹39,978 every month for 15 years. Only where the ₹5 lakh goes is different. Here is the result at four fund returns:

The break-even is where the fund's return after costs roughly equals the loan rate: about 9 % after costs, or 10 % before, on this 8.75 % loan. Tax on gains pushes that line a little higher, because the invest route has far bigger gains to be taxed than the prepay route's 39 months of SIPs.

The same comparison as a yearly return makes the trade-off plain. Prepaying "earns" exactly the loan rate, every year, with no risk and no tax under the new regime. The fund's return after costs and tax depends on what the market does:

06What about ₹10,000 extra a month: higher EMI or a SIP?

The same logic works for a monthly amount. Paying ₹49,978 a month instead of ₹39,978 — ₹10,000 extra towards the loan — clears it in 121 months, or 10 years 1 month, instead of 15 years. Total interest falls from ₹31,96,020 to ₹20,26,708, a saving of ₹11,69,312.

For a fair test, the prepay route then invests the full ₹49,978 a month for the last 59 months; the invest route puts ₹10,000 a month into a SIP for all 15 years and keeps the loan running.

07Does the tax deduction change the answer? Old vs new regime

Home-loan tax benefits only exist under the old tax regime. From 1 April 2026 they sit in the Income-tax Act, 2025, which replaced the 1961 Act; the limits did not change (as of October 2026, tax year 2026-27):

• New regime: you get no deduction for the interest, so every rupee of interest you avoid is a full rupee saved. Prepaying gives up nothing.
• Old regime, interest above ₹2 lakh: on this loan the interest is ₹29,167 in the first month alone, so the year's interest is well above the ₹2 lakh cap. Prepaying ₹5 lakh still leaves you claiming the full ₹2 lakh for several years — you lose little or no deduction.
• Old regime, interest below ₹2 lakh: later in a loan, or on a smaller loan, each rupee of interest saved also loses its deduction. At a 30 % slab plus 4 % cess (31.2 %), an 8.75 % loan really costs about 6 % — a lower bar for investing to beat.
• Principal: most salaried people already fill the ₹1.5 lakh limit with EPF and other savings, so extra principal repaid usually adds no tax benefit.

Fund gains are taxed under both regimes. Equity fund units held more than 12 months are long-term: 12.5 % on gains above ₹1.25 lakh a year. Units held 12 months or less are taxed at 20 %. Both get 4 % cess.

08What's changed in 2026 for home-loan borrowers

• Rates turned up. The RBI raised the policy repo rate by 0.25 % to 5.50 % on 7 October 2026, its first increase since February 2023, and changed its stance to "calibrated tightening". Home loans linked to the repo rate reset upwards at their next reset date. The next policy meeting is on 2–4 December 2026.
• Inflation is higher. Retail inflation was 5.54 % in September 2026, up from 4.83 % in August (MoSPI, provisional, base 2024 = 100). Higher inflation reduces what investment gains are worth in real terms — the 5.5 % in our example is close to the latest figure.
• No prepayment charges on floating-rate loans. Under the RBI's Pre-payment Charges on Loans Directions, 2025, lenders can't charge individuals for prepaying a floating-rate loan taken for non-business purposes, for loans sanctioned or renewed from 1 January 2026; older RBI rules already barred such charges on floating-rate home loans. Fixed-rate loans may still carry a charge — check your Key Facts Statement.
• New tax law, same limits. The Income-tax Act, 2025 took effect on 1 April 2026. The home-loan deductions were renumbered but the ₹2 lakh and ₹1.5 lakh limits are unchanged, and they are still available only under the old regime.
• SIPs at a record. Monthly SIP contributions reached ₹32,490 crore in September 2026 (AMFI). Strong inflows say nothing about future returns; decide on your own numbers.

09Should you prepay your home loan or invest? A decision checklist

Go through these in order. Each "no" answers the question before you get to the maths.

1. Emergency fund first. Keep 6 months of expenses, including the EMI, in a savings account or liquid fund. Money prepaid into a home loan is hard to get back in a crisis.
2. Costlier debts first. Credit-card dues, personal loans and car loans usually cost more than a home loan. Prepay those before either option.
3. Your loan rate. The higher it is, the more prepaying is worth. After a rate rise, re-run the numbers — and check whether your bank stretched your tenure.
4. Your time horizon. Equity funds need many years. If the money may be needed within 5 years, the case for investing it in equity is weak.
5. Your sleep test. Could you watch the fund fall 30 % without selling? If not, prepaying's certain return is worth more to you than a possible higher one.
6. Your goals. Retirement and children's education need investments too. Paying off the house early but reaching 50 with no savings is not a win.
7. Consider a split. Many borrowers prepay part and invest part — for example, half of a bonus to each — which gives some certainty and some growth.

10Your next step

1. Find your outstanding principal, rate, EMI and remaining months on your latest loan statement, and check them with the EMI Calculator.
2. Put them into the Prepayment Optimizer with the amount you could prepay, and note the interest and months saved with a shorter tenure.
3. Estimate the investing side with the SIP Calculator (for a monthly amount) and the Post-tax Return Calculator (for a lump sum), using a cautious return after costs.
4. Compare the two the fair way, as in the table above, at a cautious and an optimistic return — and read "Your Home Loan EMI, Explained" for more ways to cut interest.

11Questions people ask