Prepaying a home loan: cut the EMI or cut the tenure?

You have a bonus or a matured FD, and a home loan running at 8.5%. Prepaying feels responsible, and most of the time it is. But when you hand over the cheque, the lender will want to know one thing: do you want a lower EMI or a shorter loan? In the example below, that answer changes the interest you save by a factor of nearly three.

Why prepayment saves so much early on

Your EMI stays fixed, but what it pays for changes. Each month the bank charges interest on the outstanding balance, and whatever is left of the EMI reduces principal. Early in a long loan, most of the EMI is interest. On a ₹50 lakh loan at 8.5% for 20 years, the EMI is ₹43,391. Of the roughly ₹5.2 lakh you pay in the first year, ₹4,21,182 is interest and only ₹99,511 reduces the loan.

A prepayment goes straight to principal. Every rupee of principal you remove stops attracting interest for the rest of the loan, which is why a rupee prepaid in year three saves far more than a rupee prepaid in year fifteen. Left alone, this loan costs ₹54.14 lakh in interest over 20 years, more than the amount borrowed. You can see the full schedule for your own numbers in the home loan EMI calculator.

The worked example

Say you took that ₹50 lakh loan at 8.5% for 20 years. Three years in, along with your 37th EMI, you prepay ₹5,00,000. After 36 EMIs the outstanding balance is ₹46,74,300. The 37th EMI takes it to ₹46,64,019, and the prepayment brings it down to ₹41,64,019. Now you choose.

Cutting the tenure saves ₹13.09 lakh and closes the loan 41 months early, three years and five months sooner. Cutting the EMI saves ₹4.44 lakh and reduces the EMI by ₹43,391 − ₹38,739 = ₹4,652 a month for the remaining 203 months. Same ₹5 lakh, very different results.

The reason is mechanical. Keep paying ₹43,391 on a smaller balance and more of every instalment goes to principal from that month onwards, so the balance falls faster and faster. Lower the EMI instead and you keep the original slow repayment curve, just on a smaller base. Interest keeps running for all 240 months.

When a lower EMI is the better call

The tenure option wins on interest, but interest isn't the only thing that matters. I'd lean towards the lower EMI if the instalment is already squeezing the household budget, if income is about to drop (a career break, a move to one income, a switch to a riskier job), or if your emergency fund is thin and a smaller fixed outflow buys you room to breathe. Seen that way, a lower EMI is a liquidity decision. In this example you'd be giving up ₹13.09 lakh − ₹4.44 lakh = ₹8.65 lakh of interest savings in exchange for ₹4,652 a month of flexibility. Sometimes that trade is worth making. Just make it on purpose.

Lenders differ on what they do by default when a part-payment comes in. Tell them in writing which option you want at the time you pay, and check the revised repayment schedule they send afterwards. It's easy to assume the tenure was cut and find out two years later that the EMI was reduced instead.

You don't need a lump sum

Small regular prepayments do a lot of the same work. On the same ₹50 lakh loan, paying ₹5,000 extra every month from the very first EMI closes it in 187 months instead of 240, 53 months early, and saves ₹13.89 lakh in interest. That's about ₹9.3 lakh of extra principal spread over fifteen and a half years, a pace many salaried households can keep up without touching their savings. The loan prepayment calculator lets you try a one-time amount, a monthly top-up, or both on your own loan.

Prepayment charges

For floating-rate home loans taken by individuals, RBI rules have long stopped lenders from charging foreclosure or part-prepayment penalties, and RBI's Pre-payment Charges on Loans Directions, 2025 set out the current position for newer loans. Fixed-rate loans and loans taken for business purposes can be treated differently, and which rules apply depends on your sanction or renewal date. Read your sanction letter. If a charge does apply, subtract it from the interest saved before you decide. With hybrid loans that are fixed for a few years and then float, check which phase you're in before paying.

The tax angle, without the myths

Under the new regime, interest on a self-occupied home gets no deduction at all. The loan's real cost is its full 8.5%, and every rupee of interest you avoid is a full rupee saved.

Under the old regime, interest on a self-occupied home is deductible up to ₹2,00,000 a year under section 24(b), and principal repayment counts towards the ₹1,50,000 limit of 80C. People worry that prepaying wastes this deduction, so check the numbers. In year four of this loan, interest is ₹3,92,394 without the prepayment and ₹3,52,026 with it. Both are well above ₹2 lakh, so the deduction is unchanged that year. The interest you saved was interest you couldn't deduct anyway. The deduction only starts to shrink once yearly interest falls below ₹2 lakh, which happens in year 15 without the prepayment and year 12 with it. The tax cost is real but small, and it arrives late.

Prepay, or invest the money instead?

The honest framing is a guaranteed return against an uncertain one. Prepaying an 8.5% loan earns you exactly 8.5%, and it's effectively tax-free because you're avoiding an expense rather than earning income. To beat that by investing, you need more than 8.5% after tax, on average, with all the ups and downs that implies. An FD at 7% doesn't get there in any tax slab. Equity might over fifteen years and might not over the next five. SIP vs FD after tax and inflation goes through how those post-tax numbers actually work out.

My own order of priorities is simple. Build the emergency fund first. Then clear anything costlier than the home loan, such as a personal loan or a credit card balance. After that, splitting surplus between prepayment and long-term investing is a reasonable middle path, and the split can lean towards prepayment the closer you are to retirement. What I wouldn't do is empty the emergency fund to prepay. Once money goes into the loan, the bank won't hand it back without a fresh loan application. How big your emergency fund should be helps you work out that floor first.

One more check before prepaying: compare your rate with what your lender offers new borrowers today. If yours is well above that, asking for a rate reset or moving the loan to another lender can save more than a prepayment, sometimes without spending any of your cash. The home loan balance transfer calculator shows whether the saving survives processing and legal fees.

For a next step, pull your latest loan statement and note three numbers: outstanding principal, current rate and remaining months. Enter them in the loan prepayment calculator with the amount you can spare, read off the interest saved under tenure reduction, and compare it with any charge your sanction letter mentions. If you're still deciding whether to buy at all, rent vs buy in India covers that question first.