Does prepaying your home loan cost you the ₹2 lakh tax benefit?

Short answer: far less than most people fear, and less the bigger your loan. On a ₹50 lakh loan you keep about half the deduction you were afraid of losing. On a ₹75 lakh loan you keep roughly two-thirds. And if you are on the new tax regime, you lose nothing at all, because there is no deduction there to lose.

This is the single most misunderstood number in Indian personal finance, and nearly every calculator online gets it wrong in the same direction — toward telling you to invest.

First: are you even claiming it?

Section 24(b) lets you deduct home-loan interest on a self-occupied property, capped at ₹2,00,000 a year. That deduction exists only under the old tax regime. Under the new regime there is no §24(b) deduction on a self-occupied house, so prepaying costs you exactly zero tax benefit and the question stops here.

With the new regime now the default, a large share of the people reading advice about “losing your tax benefit” are not receiving that benefit in the first place.

Why the cap makes prepaying cheaper than it looks

The deduction is capped, so it is capped both before and after you prepay. A ₹50 lakh loan at 9% pays roughly ₹4.3 lakh of interest in a year — more than double the cap. Prepay a chunk of it and your interest might fall to ₹3.9 lakh, which is still over the cap. You went on claiming the full ₹2,00,000. Nothing was lost.

Only once your interest falls below ₹2 lakh does prepaying start costing you real relief. The bigger the loan, the further away that point is, and the less prepaying costs you.

What the numbers actually are

All figures below come from the same engine the prepay versus invest calculator runs, for one stated scenario: a 20-year loan at 9% taken in April 2024, a ₹5,00,000 lump prepayment made in August 2026, and a 30% marginal rate. Change any of those and the numbers move — that is the point of the calculator.

Read the last column as: of the tax relief you would lose if the deduction were uncapped, how much do you actually lose. At ₹15 lakh the answer is all of it — the shortcut is correct. At ₹75 lakh you lose barely a third, because you stay above the cap either way.

The shortcut is not always wrong — and that matters

On a ₹15 lakh loan the shortcut says 6.30% and the honest answer is 6.38%. That difference is noise, and anyone telling you the rule of thumb is simply wrong is overselling. It is a good approximation for a small loan, and it degrades as the loan grows. Knowing where it breaks is the useful part.

The error also scales with your tax bracket, because the shortcut’s whole effect is the discount it applies. On the same ₹50 lakh loan:

• 5% bracket: shortcut says 8.55%, the real bar is 8.86% — close enough to ignore
• 20% bracket: shortcut says 7.20%, the real bar is 8.41% — a full point out
• 30% bracket: shortcut says 6.30%, the real bar is 8.10% — nearly two points out

So the people most likely to be misled are exactly the ones with the most at stake: high earners with large loans, being told to invest when the honest arithmetic says prepay.

What this changes

A bar of 8.10% rather than 6.30% is not a technicality. It is the difference between “almost any equity fund clears this” and “you need a genuinely good decade, after tax, to beat a guaranteed saving.” And the loan side of that comparison is certain — there is no year where prepaying returns −15%.

Two things push the same way and are usually left out. Prepaying a loan is not a taxable event: the interest you avoid is avoided in full, with no capital gain and no TDS. And debt funds bought after March 2023 are taxed at your slab, so a 7% debt fund is about 4.9% net at 30% — below the bar before you even start.

What this page does not compute

• Section 80C on principal. Principal you repay, including a prepayment, can count toward the ₹1.5 lakh 80C limit under the old regime — but most people's 80C is already full from EPF, insurance and ELSS, so it usually changes nothing. Check yours.
• Let-out property. The ₹2 lakh cap is for a self-occupied house. Interest on a let-out property is deductible without that cap, though the loss you can set off against other income is separately restricted.
• Joint owners. Co-borrowers who each own a share can each claim up to ₹2 lakh, which raises the household cap and moves every figure above.
• Prepayment charges. The RBI's Pre-payment Charges on Loans Directions, 2025 bar charges on floating-rate loans to individuals for non-business purposes, for loans sanctioned or renewed on or after 1 January 2026. Fixed-rate and older loans may still carry one — see the prepayment rules guide.

Related: Home loan prepayment rules and charges · Old vs new regime for FY 2026-27

Educational content only — not investment or tax advice. Figures are computed for the stated scenario; your own will differ. Verify tax treatment with a qualified adviser, and charges with your lender.