Money & Tax · Part 5 · Tax · 12 min read · September 2026

Your home loan saves you tax. Just not enough to keep you on the old regime.

It comes up in almost every sanction conversation, usually while the borrower is still reading the rate. And of course you get the tax benefit on the interest. It is true. It is also, for a large share of salaried borrowers in Tax Year 2026-27, worth exactly nothing — because claiming it means moving to a regime that costs them more than the deduction returns. Nobody re-checks that after the loan is disbursed, and the file quietly sits on the wrong side of the arithmetic for years.

Where the belief comes from

It is not a myth someone invented. For most of the last two decades it was simply correct.

There was one set of slabs, the deductions were the only way to move your taxable income, and a home loan was the largest deduction most salaried people would ever generate. ₹2,00,000 of interest plus ₹1,50,000 of principal inside 80C was ₹3,50,000 off the top of an income taxed at 30% above ₹10,00,000. That was over a lakh of tax, every year, from one loan. Advising a borrower to plan around it was sound.

What changed is not the deduction. The deduction has been ₹2,00,000 for a decade. What changed is everything on the other side of the comparison. The new regime arrived with lower rates and wider bands, then kept improving in successive Budgets while the old regime stood completely still. Under the Tax Year 2026-27 structure the first ₹4,00,000 is nil, the standard deduction is ₹75,000 against the old regime's ₹50,000, and the rebate wipes out tax entirely up to ₹12,00,000 of taxable income.

The old regime, meanwhile, still starts taxing at ₹2,50,000, still jumps to 20% at ₹5,00,000, and still hits 30% at ₹10,00,000. It is a 2014 rate card being asked to compete on the strength of a 2014 deduction limit. The home loan did not get weaker. The thing it was supposed to beat got very much stronger.

What the deduction actually is, in this year's numbering

Worth being exact, because the section numbers moved this year and the conditions are narrower than most borrowers assume.

• Self-occupied house. Interest deductible up to ₹2,00,000 a year under Section 22. Old regime only. You may treat up to two houses as self-occupied.
• Principal repayment. Sits inside the 80C group, ₹1,50,000 shared with everything else in that basket. Old regime only. Stamp duty and registration in the year of purchase also land here.
• Let-out house. Interest deductible in full in the old regime, with the resulting loss set off against other heads up to ₹2,00,000 in the year and the balance carried forward eight years. In the new regime the deduction survives but is restricted to the taxable rent.
• The completion condition. Construction or purchase must complete within five years from the end of the tax year in which the money was borrowed. Miss it and the self-occupied cap collapses from ₹2,00,000 to ₹30,000.
• Pre-construction interest. Interest paid before possession is not lost, but it is not immediate either — it is claimed in five equal annual instalments starting from the year of completion, and it competes for room inside the same ₹2,00,000 ceiling.

The break-even, worked out

Rather than argue in principle, here is the only question that decides it: how much total old-regime deduction do you need before the two regimes cost the same? Everything below is the Tax Year 2026-27 structure — new regime standard deduction ₹75,000 and the ₹60,000 rebate up to ₹12,00,000 taxable, old regime standard deduction ₹50,000 and the ₹12,500 rebate up to ₹5,00,000, cess at 4% on both.

Read the last column slowly. The single largest deduction most salaried Indians will ever have covers between a quarter and a little over a third of the distance. Everything else — 80C, 80D, NPS, HRA — has to supply the remaining two-thirds, and it has to do so every year, not once.

Run it on a real file

A borrower earning ₹15,00,000, three years into a ₹50 lakh loan at 8.5% over twenty years. Interest that year is about ₹4,02,800, so the deduction is pinned at the cap. Provident fund and insurance fill 80C completely. Health insurance uses ₹25,000 of 80D. This is a well-organised file — the version tax planners describe as making full use of the old regime.

That is the whole problem in one block. The old regime wins the deduction contest by a mile and loses the tax bill anyway. Push the same package up the salary scale and the gap widens rather than closes — the new regime is ahead by about ₹83,200 at ₹18 lakh, ₹1,04,000 at ₹20 lakh and ₹1,32,600 at ₹30 lakh.

Where the old regime genuinely still wins

It has not stopped winning. It has stopped winning on a home loan alone. The situations where it still comes out ahead have a common shape: something large, recurring and deductible that has nothing to do with the loan.

• A substantial HRA exemption. This is the big one, and it is the only ordinary lever large enough to change the answer by itself. At ₹15 lakh of salary, with 80C and 80D used and no home loan interest, the old regime turns profitable somewhere around ₹4,00,000 of HRA exemption. At ₹20 lakh even ₹5,00,000 of exemption is not enough on its own.
• A genuinely let-out property. Here the interest deduction is uncapped in the old regime. A large loan against a modestly rented flat can throw off a loss far bigger than ₹2,00,000, and the old regime lets you use ₹2,00,000 of it against salary and bank the rest for eight years.
• The full deduction stack, seriously used. 80C, 80D for yourself and elderly parents, the additional NPS deduction, education loan interest, donations. Four to five separate provisions, all live, all documented.
• Older taxpayers. The old regime's exemption threshold rises to ₹3,00,000 at sixty and ₹5,00,000 at eighty, and 80TTB gives ₹50,000 on deposit interest against the ₹10,000 of 80TTA. On a pension-and-interest income the arithmetic can flip.

Note what is absent from that list: having a home loan. A home loan is a contributor to a case that has to be made on other grounds. It is not the case.

Four things about the let-out route that are widely stated wrongly

The let-out property is where the old regime keeps real power, and it is also where the internet is least reliable. Several large, well-ranked pages — including ones run by lenders — describe the new regime's treatment of let-out interest incorrectly. Since this is exactly the situation where the regime choice carries the most money, it is worth setting out plainly.

1. In the new regime, let-out interest cannot create a loss. The deduction is restricted to the taxable rent. Your house property income can be brought down to nil. It cannot go below.
2. There is no ₹2,00,000 inter-head set-off in the new regime. That figure is quoted constantly in a new-regime context. It belongs to the old regime. In the new regime a house property loss is not set off against salary at all.
3. And it is not carried forward either. Excess interest in the new regime does not wait for a better year. It is gone.
4. Beyond two houses, self-occupation is not a choice you get to make. Two properties may be treated as self-occupied with nil annual value. Anything further is treated as let out whether or not it earns you a rupee, and notional rent is brought to tax.

The co-borrower who is not a co-owner

This one is a banking-desk problem before it is a tax problem, and it surfaces years later at filing.

When income is short of the eligibility requirement, the standard fix is to add a co-applicant — most often a spouse — so the household income supports the EMI. That is a lending decision, and it is made at the loan stage. Whether that person's name goes on the sale deed is a separate decision, made at the property stage, sometimes weeks later, often with an eye on stamp duty rather than tax.

The deduction follows ownership, not liability. A co-borrower who is not a co-owner claims nothing, regardless of how much of the instalment leaves their account. Where both conditions do hold — co-owner on the deed and co-borrower on the loan — each claims in proportion to what they actually repay, and each has their own ₹2,00,000 ceiling, so a couple with ₹4,00,000 of annual interest can claim ₹2,00,000 each. That is the version worth planning for, and it has to be arranged when the deed is drawn, not when the return is filed.

The prepayment myth this quietly kills

Ask a borrower why they are not prepaying and a familiar answer comes back: I'll lose my tax benefit.

Work it through and the fear mostly evaporates, because the cap protects the deduction long before prepayment can touch it. On that ₹50 lakh loan at 8.5% over twenty years, annual interest stays above ₹2,00,000 until roughly the fifteenth year. For the whole first half of the loan the deduction is pinned at the ceiling and is completely insensitive to the balance.

Just over ₹19 lakh of prepayment, and the deduction has not moved by a rupee. And this is the argument made by someone who is on the old regime in the first place. For the borrower on the new regime — which, per everything above, is most of them — there is no deduction to protect at all, and the entire objection is defending something they are not claiming.

What to check this month

• Find out which regime your payslip is actually on. The new regime is the default. If you never returned the declaration in April, you are on it — and if you have been assuming your loan puts you on the old one, your TDS and your assumption have been disagreeing all year.
• Compute both, on your real numbers. Not a rule of thumb, not what the relationship manager said at sanction. Both, with your own deductions, once.
• Check the sale deed, not the loan agreement. If a second earner is meant to be claiming interest, their name has to be on the title. This is repairable early and expensive to repair late.
• Redo it every few years. Salary changes, HRA changes, 80C fills or empties as loans and policies mature. The answer is not permanent, and a salaried taxpayer without business income chooses afresh in each year's return — the declaration you gave your employer sets your monthly TDS, not your final position.
• If you have business or professional income, get advice before you move. The freedom to switch annually is not yours. Opting out of the default regime and later returning to it is a one-way sequence, after which the old regime closes permanently.

The one-line summary

A home loan is a good reason to buy a house and a weak reason to pick a tax regime. The deduction is real, it is capped, and it has spent a decade standing still while the thing it is measured against improved every year. Compute both regimes on your own figures before you accept the sentence you were told at the sanction desk — and if your file has a let-out property, business income or an unusual ownership structure in it, that computation is a conversation with a chartered accountant rather than a page on the internet.

Written at the MoneyClarityTech desk — by a working retail-credit professional in Indian banking who reads loan files, credit reports and bank statements every working day. Patterns from hundreds of real cases; every identifying detail removed. More about MoneyClarityTech →