Capital Gains on Property Calculator

What changed on 23 July 2024, and why it splits sellers into winners and losers

Until 23 July 2024, long-term capital gains on immovable property were taxed at 20%, but you first got to inflate your purchase price using the Cost Inflation Index. A flat bought for ₹40 lakh in 2010 was not treated as having cost ₹40 lakh when you sold it in 2025 — it was treated as having cost roughly ₹90 lakh, because that is what ₹40 lakh of 2010 money is worth in 2025 terms. Only the appreciation above that inflated figure was taxed. The logic was straightforward: you should not pay tax on the part of your "profit" that is merely the rupee losing value.

From 23 July 2024 the rate dropped to 12.5% and indexation went away entirely. A lower headline rate applied to a much larger base. Whether that helps or hurts you depends on a single question: has your property appreciated faster or slower than inflation? Property that has roughly doubled over fifteen years has barely beaten inflation, so indexation wipes out most of the gain and the old 20% route wins comfortably. Property that has gone up five-fold in eight years has far outrun inflation, so indexation barely helps and the flat 12.5% wins. Because the answer genuinely varies, the law preserved the choice — but only for a defined group, and only on a defined set of properties.

Who gets the grandfathered choice — and who does not

The grandfathering is narrower than most people assume. Two conditions must both hold. First, you must be a resident individual or a Hindu Undivided Family. Second, the property must have been acquired before 23 July 2024. If both are satisfied and the gain is long-term, you compute the tax at 12.5% without indexation, compute it again at 20% with indexation, and pay the lower of the two. There is no election to file, no form to submit — you simply report the lower figure in your return with a computation supporting it.

Everyone else has one route only. A non-resident — however long they have held the property, however Indian the property is — computes the gain on plain historical cost and pays 12.5%. So does a company, a firm or an LLP. And so does any resident on property bought on or after 23 July 2024, where indexation simply does not exist any more. For NRIs this is a meaningful loss: a flat held since 2005 might have an indexed cost three times its actual cost, and a resident owner of the identical flat in the identical building would pay a fraction of the tax on the same sale. It is worth knowing before you decide when to sell, and worth pairing with the lower-TDS certificate route under Section 395 (old 197), because the buyer otherwise deducts under Section 393 (old 195) on your entire sale price rather than on your gain.

A worked example — where indexation still wins decisively

Take a resident who bought a flat in 2010 for ₹40 lakh and sells it in 2025 for ₹1 crore. On the flat route the gain is the plain difference, ₹60 lakh. At 12.5% that is ₹7.5 lakh, and because the gain exceeds ₹50 lakh a 10% surcharge applies, taking it to ₹8.25 lakh, and 4% cess brings the final figure to roughly ₹8.58 lakh.

Now run the grandfathered route. The Cost Inflation Index for 2010-11 was 167 and for 2025-26 is 376, so the ₹40 lakh cost is restated as roughly ₹90.06 lakh. The gain collapses to about ₹9.94 lakh. At 20% that is around ₹1.99 lakh, and since the gain is now below ₹50 lakh no surcharge applies; 4% cess takes it to roughly ₹2.07 lakh. The indexed route saves about ₹6.5 lakh on the same sale — and note the second-order effect that catches people out: indexation does not just shrink the taxable gain, it can also push you below a surcharge threshold, so the saving compounds. If the same seller were an NRI, none of this would be available and the tax would be the full ₹8.58 lakh.

When the flat 12.5% route is the better one

Indexation is not automatically the winner, and assuming it is costs money in the opposite direction. The trade-off is a 7.5 percentage-point rate cut against an inflated cost base. Indexation only pays for itself when the inflation adjustment on your cost is large enough to outweigh the higher rate — broadly, when the indexed cost removes more than about 37.5% of the gain. That happens when a property has been held for a long time, or when it has appreciated only modestly.

Consider a resident who bought in 2021 for ₹80 lakh and sold in 2025 for ₹2 crore. The plain gain is ₹1.2 crore; at 12.5% plus 15% surcharge and cess that is roughly ₹17.9 lakh. Indexing ₹80 lakh from a CII of 317 to 376 lifts the cost only to about ₹94.9 lakh, leaving a gain of ₹1.05 crore — at 20% plus surcharge and cess that comes to well over ₹25 lakh. Four years of inflation simply cannot offset a rate that is 60% higher. The rule of thumb: short holdings with strong appreciation favour the flat 12.5%; long holdings with ordinary appreciation favour indexation. Everything in between needs the arithmetic actually run, which is what the calculator above does.

The exemptions that can remove the gain entirely — Sections 82, 85 and 86

The rate debate is often secondary, because a well-planned reinvestment can reduce the tax to nil. Section 82 (old Section 54) exempts the gain on the sale of a residential house where you buy another residential house in India — within one year before or two years after the sale, or construct one within three years. Section 86 (old Section 54F) does the parallel job where you sell a non-residential asset such as land or a commercial unit and invest the net sale consideration, not merely the gain, in a residential house. That distinction matters enormously: under Section 82 you reinvest the profit, under Section 86 you reinvest the whole receipt, and partial reinvestment gives you only a proportionate exemption.

Section 85 (old Section 54EC) offers a different route: invest up to ₹50 lakh of the gain in specified bonds — NHAI, REC and similar — within six months of the transfer, and that much of the gain is exempt. The bonds carry a five-year lock-in and a modest rate of interest, so the exemption is effectively purchased with yield. It suits sellers who do not want to buy more property and who have a gain comfortably under ₹50 lakh. All three exemptions come with a practical trap: if the reinvestment will not be completed before your return is due, the gain must be parked in a Capital Gains Account Scheme deposit with a bank by the filing deadline. Miss that step and the exemption is lost even though you eventually bought the house.

Common mistakes that inflate the tax bill

The most frequent error is understating the cost. Cost of acquisition is not just the figure on the purchase deed — it includes the stamp duty and registration charges you paid then, brokerage on the purchase, and legal fees. Cost of improvement covers genuine capital additions such as an extra floor, a structural extension or a full renovation, and each is indexed from the year it was actually incurred, not from the year of purchase. What it does not cover is repainting, replacing fittings or routine repairs. The second error is forgetting transfer expenses on the sale side — brokerage of even 1% on a ₹1 crore sale is ₹1 lakh of deductible expenditure that is regularly left out. All of it requires documentation, so keep the bills for decades; this is one of the few areas of tax where paperwork from twenty years ago still matters.

The other recurring problem is the stamp duty value. Where the value adopted by the stamp valuation authority exceeds your stated consideration beyond the permitted tolerance band, the law substitutes that higher value as your sale price — so a deal struck below circle rate is taxed on the circle rate. Sellers also frequently forget that where a property is jointly held, the gain is split between the owners in their ownership proportion, and each computes and claims exemptions separately; that can keep both below a surcharge threshold. Finally, do not confuse the tax with the TDS. The buyer deducts under Section 394 (old 194-IA) at 1% of the consideration where the seller is resident, and under Section 393 (old 195) at the full applicable rate on the entire consideration where the seller is an NRI. Neither deduction is your tax — it is an advance against it, and the difference comes back only as a refund after you file.

Reporting, losses and getting the year right

A property sale is reported in Schedule CG of your income tax return, and because capital gains cannot be declared in ITR-1 or ITR-4, a sale generally pushes you into ITR-2 or ITR-3 for the year. The gain arises in the financial year in which the transfer takes place, which is normally the date of the registered conveyance rather than the date of the agreement or the date the money arrives. If the transfer falls in the last quarter of the year, advance tax obligations are triggered immediately and interest under the advance-tax provisions runs from the relevant instalment date — a large one-off gain in March is a common source of unexpected interest.

If the sale produces a loss, it still needs reporting and is worth reporting. A long-term capital loss may be set off only against long-term capital gains, while a short-term loss may be set off against both short-term and long-term gains. Either can be carried forward for eight assessment years — but the carry-forward survives only if the return for the loss year is filed by the due date. Sellers who assume there is nothing to declare because there was no profit routinely forfeit a shelter worth lakhs against a future gain. And note that a loss does not stop the buyer deducting TDS, so a loss-making sale by an NRI can still see a substantial sum withheld unless a Section 395 certificate is obtained in advance.