Capital Gains Tax on Property Calculator: LTCG, STCG and How to Reduce the Tax

Capital gains tax on property is the income tax you pay on the profit made when you sell land, a house, a flat or a commercial unit. The profit, called the capital gain, is the sale price minus the cost of acquisition, minus any cost of improvement, minus the expenses of the transfer itself such as brokerage and legal fees.

In symbols: capital gain = sale consideration − (cost of acquisition + cost of improvement + transfer expenses). Tax = capital gain × applicable rate. Surcharge (which depends on your income) and 4% health and education cess are then added to the tax.

The rate depends on how long you held the property. More than 24 months makes it a long-term capital gain; 24 months or less makes it a short-term gain. Under the rules in force for FY 2025-26, LTCG on property is taxed at 12.5% without indexation, and STCG is added to your other income and taxed at your slab rate.

The calculator takes three inputs and estimates the tax including the 4% health and education cess, before any income-based surcharge and exemptions.

• Purchase price: what you paid for the property. Use the price on your purchase deed. The tool does not add stamp duty, improvement costs or other acquisition expenses, so the gain it shows is higher than the gain you will actually report.
• Sale price: the sale consideration in the new deed. If the circle-rate value is higher than the agreed price, the tax law can treat that higher value as the sale price, so ask your CA.
• Holding period (0 to 30 years): whole years between purchase and sale. Two years or more is treated as long-term; less than two as short-term.

The outputs are the total tax (the headline figure), the capital gain (sale minus purchase), the regime applied (“LTCG @ 12.5%” or “STCG @ slab, 30% assumed”), the tax before cess, the 4% cess and post-tax proceeds, which is the sale price minus the total tax. Post-tax proceeds is not the cash you walk away with if a home loan is still outstanding; the lender is repaid out of the sale price first.

Say you bought a 2BHK in Baner, Pune, for ₹1.1 crore and are selling it seven years later for ₹1.85 crore. Enter those figures and 7 years. The calculator shows a capital gain of ₹75 lakh, treats it as long-term and applies 12.5%: ₹9.375 lakh of tax plus ₹37,500 of cess, a total of ₹9.75 lakh, leaving post-tax proceeds of about ₹1.75 crore.

That is the starting point. Now refine it the way your CA will.

Because you are a resident and the flat was bought before 23 July 2024, you can also compute tax at 20% with indexation, which raises your cost using the government’s Cost Inflation Index. Suppose, purely as a hypothetical, your indexed cost came to ₹1.45 crore. The indexed gain would be ₹40 lakh, and 20% of that is ₹8 lakh, less than the ₹9.375 lakh at 12.5% (both figures before cess). You pay the lower figure. The calculator does not run this comparison, and on older purchases it is often worth running.

Now the short-term case. Suppose instead you bought a Noida flat for ₹90 lakh and sold it 18 months later for ₹1.05 crore. Enter 1 year. The gain is ₹15 lakh, taxed at the assumed 30% slab: ₹4.5 lakh, or ₹4.68 lakh with 4% cess. A quick flip gives up almost a third of the gain, and none of the exemptions below apply.

The Income Tax Act gives three main routes to reduce or eliminate LTCG on property. None of them applies to short-term gains.

Section 54 is the one most homeowners use. If you sell a flat in Whitefield with a ₹75 lakh gain and buy a bigger house for ₹2 crore within two years, the full ₹75 lakh gain can be exempt. Section 54EC suits sellers who don’t want another property: the bonds lock up the money for five years at a modest interest rate, so compare that with the tax saved.

Timing is where people slip. The ITR is often due before you have found the next house. If you have not reinvested by then, you must park the money in the Capital Gains Account Scheme with an authorised bank, or lose the exemption for that year.

The tax on the gain is yours to pay, but the buyer is often required to deduct part of it at source. The rules differ sharply between resident and non-resident sellers.

• Resident seller: if the sale consideration is ₹50 lakh or more, the buyer deducts 1% TDS under Section 194-IA and deposits it with the government. On a ₹1.85 crore sale that is ₹1.85 lakh. You claim it as credit against your final tax when you file your ITR.
• NRI seller: the buyer deducts TDS under Section 195 on the capital gain at the applicable rate plus surcharge and cess. In practice buyers often deduct on the full sale value when no gain computation is provided, which can lock up far more than the actual tax.
• Lower-deduction certificate: an NRI seller can apply to the tax department for a certificate allowing TDS at a lower rate, based on the actual gain. Apply well before the sale date.
• No indexation choice for NRIs: the option to compute LTCG at 20% with indexation for pre-July 2024 purchases is available only to resident individuals and HUFs.

If you are an NRI in Dubai selling a flat in Gurgaon, plan the TDS paperwork before you agree the price. The exact mechanics depend on your case, so work with a CA who handles NRI property sales regularly.

The calculator is a rough first pass. It will usually overstate your tax, occasionally understate it, and should never be your filing figure.

• No surcharge. The 4% health and education cess is included, but the income-based surcharge that applies at higher incomes is not, so the real tax can be higher than shown.
• No 20%-with-indexation option. Resident sellers of property acquired before 23 July 2024 may pay less by choosing indexation; the tool only uses 12.5%.
• No cost of improvement or transfer expenses. Documented renovation costs, brokerage and legal fees reduce the gain; the tool ignores them.
• No exemptions. Sections 54, 54F and 54EC can cut the tax to zero; the tool applies none of them.
• Whole-year holding period. The law uses “more than 24 months”; the tool uses whole years and treats 2 years as long-term. If you are near the 24-month line, count the actual dates.
• Flat 30% for short-term gains. If your slab is lower, STCG tax is lower than shown.
• Sale price as entered. If the circle-rate value is higher than your sale price, the tax law may substitute it.
• Post-tax proceeds ignore any outstanding loan, TDS already deducted and selling costs.

• Selling at month 23. A few weeks can move the gain from your slab rate to 12.5%. Check the dates on both deeds before you sign a sale agreement.
• Throwing away renovation invoices. Without bills, a ₹10 lakh interior job does nothing for your tax.
• Assuming 12.5% is always cheaper than indexation. For a flat held a long time, 20% with indexation can win. Ask your CA to run both.
• Missing the 6-month window for 54EC bonds, or the ITR deadline for the Capital Gains Account Scheme.
• Registering at a lower value to cut the buyer’s stamp duty. It invites circle-rate adjustments and scrutiny for both sides.
• Treating the calculator’s post-tax proceeds as spendable cash while a home loan is still running.

When a client asks us whether to sell, the tax number is one input, not the decision. We run the calculator first, then ask three questions: is the holding period safely past 24 months, does the client want another house (Section 54) or liquidity (54EC or simply paying the tax), and is the property still in a corridor with growth ahead of it.

Tax should shape the timing and structure of a sale. It should rarely stop a sale that makes sense for other reasons. Paying ₹9.375 lakh of tax on a ₹75 lakh gain still leaves you with about ₹65.6 lakh of profit.