Capital gain tax calculator on property
Capital gain tax calculator on property: the calculator below opens with the property card selected. Enter the purchase price with its registration and stamp duty, any improvement spend, and the sale, and it places the gain on the right side of the 24-month line, applies the elected rate and adds the 4% cess.
Two questions decide a property bill. How long the property was held, and, for holdings bought before 2024-07-23, whether the 12.5% flat rate or the 20% indexed one lands lower. Short-term gains take a third route entirely: they ride your income slabs, so the same gain costs a different amount at every salary level.
Holding periods
The 24-month line decides the rate
Property transferred on or after 2024-07-23 turns long-term at 24 months of holding; transfers before that date needed 36. Cross the line and the gain pays 12.5% with no indexation, or 20% on the indexed gain when the property was acquired before the change date. Miss the line and the gain is short-term: no special rate exists for it, the amount joins your total income, and your slab rates apply to it.
The slab route is why a quick sale can cost more than a patient one. A plot held 12 months and sold at a ₹6,00,000 gain by a taxpayer on a ₹12,00,000 salary adds ₹1,45,000 of tax. The salary alone, ₹11,25,000 of taxable income after the ₹75,000 standard deduction, sits under the ₹12,00,000 rebate limit and pays ₹0 of slab tax; stack the gain on and the slab tax is ₹1,45,000. That stacking difference is the tax on the gain, and the 4% cess takes it to ₹1,50,800.
What counts
The cost base and the proceeds
The gain is net proceeds minus the cost base, and the cost base has three slots in the calculator: the purchase price, the acquisition costs, and improvement spend. Registration fees and stamp duty belong in the second slot; structural work that raises the property's value belongs in the third. Selling expenses are subtracted from the proceeds instead, in their own field, so the sale nets down before the gain is struck.
The same base feeds both branches. When the 20% indexed branch is in play, section 48 multiplies the purchase price and acquisition costs by the index ratio from the year of purchase, and each improvement by the ratio from the year it was made. Enter the date of the improvements and the calculator indexes them from that year. Improvements made before 1 April 2001 are not counted at all.
Worked example
A flat held 87 months: the flat rate wins
A flat bought on 5 November 2018 for ₹45,00,000 with ₹3,00,000 of registration and stamp duty, and ₹2,00,000 of improvements made on 15 September 2021, sold on 20 February 2026 for ₹1,10,00,000 with ₹50,000 of selling expenses. Held 87 months, the sale is long-term, and the 2018 purchase keeps the election.
The cost base is ₹50,00,000 and the net proceeds ₹1,09,50,000, so the flat branch taxes ₹59,50,000 at 12.5%: ₹7,43,750. Indexation lifts the purchase and its costs by the 2018-19 index of 280 against 2025-26's 376, and the improvements by the 2021-22 index of 317 against the same 376. That lifts the base to ₹66,82,938, cutting the gain to ₹42,67,062, but 20% of that is ₹8,53,412. The flat rate wins this sale by ₹1,09,662.
With the 4% cess the bill is ₹7,73,500. The same election went the other way for a purchase dated 2012: the older the purchase, the bigger the index ratio grows, and the more the 20% branch has to work with.
The 2018 flat sold in 2025-26, both branches
| Step | Flat branch | Indexed branch |
|---|---|---|
| Sale price | ₹1,10,00,000 | ₹1,10,00,000 |
| Selling expenses | −₹50,000 | −₹50,000 |
| Cost base | ₹50,00,000 | ₹50,00,000 indexed to ₹66,82,938 |
| Gain | ₹59,50,000 | ₹42,67,062 |
| Rate | 12.5% | 20% |
| Tax on the gain | ₹7,43,750 | ₹8,53,412 |
| With 4% cess | ₹7,73,500 | ₹8,87,549 |
Questions
Frequently asked questions
How is capital gain tax on the sale of property calculated in India?
Net proceeds minus the cost base give the gain: purchase price, acquisition costs and improvements in the base, selling expenses off the proceeds. Held 24 months or more the gain pays 12.5%, or 20% on the indexed base for pre-2024-07-23 buys. Held less, it joins your income at slab rates.
What is the long-term holding period for property?
24 months for transfers on or after 2024-07-23. Transfers before that date needed 36 months, and the calculator reads the threshold off the sale date, sale by sale.
How are short-term property gains taxed?
At your slab rates, as part of total income. In the example above, a ₹6,00,000 gain on a ₹12,00,000 salary meant ₹1,45,000 of extra slab tax plus ₹5,800 cess, because the gain pushed taxable income past the ₹12,00,000 rebate limit.
Can I add stamp duty and registration to the purchase price?
Yes, they belong in the acquisition costs slot, alongside legal fees on the purchase. Improvement spend has its own slot. Selling expenses do not join the base; they reduce the proceeds.
Should I choose 12.5% without indexation or 20% with it?
Compute both and pay the lower. The 2018 flat above paid ₹1,09,662 less on the flat branch. A purchase from the early 2010s carries a much larger index ratio and often reverses the answer.
Does the cess apply to property gains?
Yes. The 4% health and education cess applies to the tax at the special capital gains rates like any other income tax, which is why the ₹7,43,750 above becomes ₹7,73,500.
Sources
Where these figures come from
Also on capitalgainstax.net