Section 24(b): Home Loan Interest Tax Deduction Explained

Section 24(b) of the Income-tax Act governs the deduction available on interest paid on a home loan, and it is one of the more nuanced deductions in the tax code because the rules genuinely differ depending on what you do with the property. A home you live in yourself (self-occupied) is treated very differently from a home you rent out (let-out) — different caps, different regime treatment, and different mechanics entirely, even though both draw on the same underlying loan interest.

This matters more than it might seem, because a lot of home loan borrowers assume the deduction works the same way regardless of occupancy, and end up either under-claiming what they are entitled to on a rented-out property, or over-estimating what they can claim on a home they live in themselves. The distinction between self-occupied and let-out is the single most important fork in this entire topic, and it is where we start.

Principal repayment on a home loan is a separate matter altogether, claimed under Section 80C (subject to the overall Rs 1,50,000 80C ceiling, old regime only) rather than under Section 24(b) — this guide is specifically about the interest component.

The single biggest difference between the two categories is the cap — and, just as importantly, which tax regime each one is even available under.

If you rent out a property, the calculation of your taxable house-property income does not start with rent received minus interest. It starts with rent received (technically, Net Annual Value), from which a flat 30% standard deduction under Section 24(a) is subtracted first — regardless of your actual maintenance or repair costs, whether they were higher or lower than 30%. Only after that 30% deduction is applied does the uncapped home loan interest under Section 24(b) get subtracted to arrive at your taxable (or loss-making) house-property income for the property.

This 30% standard deduction is not something you opt into or claim with receipts — it is simply how house-property income is computed, which is also why it is available under both the old and new regimes, just like the uncapped interest deduction on let-out property. It is easy to read 'both regimes' language elsewhere and assume that means every home-loan-related benefit survives the new regime, but the 30% standard deduction and uncapped let-out interest are specifically the two pieces that do — self-occupied interest and the loss set-off below are not among them.

It is common, especially in the early years of a home loan when interest paid is at its highest, for a let-out property's deductions (interest plus the 30% standard deduction) to exceed the rent received, producing a loss under the head 'income from house property.' The tax code allows this loss to be set off against your other income for the year — salary, other sources, and so on — but only up to Rs 2,00,000 in a given year, and only under the old regime. The new regime does not allow this set-off at all.

If your house-property loss for the year exceeds Rs 2,00,000, the excess does not simply disappear — it can be carried forward for up to 8 assessment years and set off against house-property income in those future years. This carry-forward is a multi-year mechanic, which is worth knowing about for your own long-term planning even though it sits outside what a single-year tool can show you — the Income Tax Calculator on this site models the current year's numbers, including the Rs 2,00,000 set-off cap, but it does not track carry-forward balances across years, so you would need to maintain that record yourself (or through your CA) across returns.

For a self-occupied property, there isn't a separate 'loss set-off' conversation in quite the same sense, because the interest deduction itself is already capped at Rs 2,00,000 — so the maximum loss a self-occupied property can generate under the head house property is bounded by that same Rs 2,00,000 figure to begin with.

A common scenario for home loan borrowers is taking a loan for a property that is still under construction, meaning you are paying EMIs — and therefore interest — well before you actually take possession. That pre-possession interest is not lost, but it also cannot be claimed in the year it was paid, since the property was not yet owned/occupied in the way Section 24(b) contemplates.

Instead, the total interest paid during the construction period is aggregated and claimed in 5 equal yearly instalments, starting from the financial year in which construction is completed and possession is taken. This instalment is claimed in addition to that year's own regular interest — so in the years immediately following possession, your total interest claim can meaningfully exceed just that year's EMI interest alone, as the pre-construction instalment is layered on top.

This is a mechanic worth knowing about if you have a home loan on an under-construction property, since it is easy to assume the pre-possession interest is simply lost. It is not — it is deferred and spread out, subject to the same self-occupied cap of Rs 2,00,000/year (or the uncapped let-out treatment) once it starts being claimed alongside regular interest.

Most Chapter VI-A-style deductions — 80C, 80D, HRA, and the self-occupied leg of Section 24(b) itself — are switched off entirely under the new regime. Home loan interest on a let-out property is a genuine exception, and it surprises a lot of people who assume, reasonably, that if self-occupied interest is disallowed under the new regime, let-out interest must be too.

The logic behind the distinction is that the 30% standard deduction and uncapped interest on let-out property are not really being treated as an 'opt-in tax break' the way 80C or HRA are — they are baked into how house-property income itself is computed in the first place, for any property that is actually generating rental income. Self-occupied property, by contrast, generates no income at all (you are living in it, not earning rent from it), so the Rs 2,00,000 interest deduction there really is a discretionary tax benefit — and it is exactly that category of benefit that the new regime strips out.

The practical upshot: if you own a let-out property, your home loan interest deduction on it is available to you no matter which regime you choose for FY 2026-27. If you own a self-occupied property, that Rs 2,00,000 deduction is only available if you stay on (or opt into) the old regime — which makes it one more data point worth feeding into your regime comparison rather than assuming either way.

For most home loan borrowers, especially anyone with one self-occupied and one let-out property, or thinking about renting out a home they currently occupy, running the actual numbers matters more than knowing the rules in the abstract — the interaction between the Rs 2,00,000 self-occupied cap, the uncapped let-out interest, the 30% standard deduction, and the Rs 2,00,000 loss set-off cap can get genuinely complex to track by hand.

The Income Tax Calculator on this site models self-occupied and let-out home loan interest simultaneously, applies the loss set-off cap automatically, and compares your resulting tax liability under both the old and new regimes side by side — which is the most reliable way to see, in rupee terms, whether staying on the old regime for the sake of your home loan deduction actually pays off for your specific numbers, rather than assuming it does.