Imagine you sell your old house in Delhi for a big profit. The government says — if you reinvest that profit into buying or building another house, we'll let you off the tax hook. That's Section 54 in a nutshell. It's one of the most exam-favourite sections in Capital Gains, appearing almost every attempt as a 4–8 mark problem.
Who can claim it? Only an Individual or HUF — companies and firms are out. The house you sell (the original asset) must be a long-term capital asset (held for more than 24 months) and it must be a residential house whose income is taxable under 'Income from House Property'. The house you buy (the new asset) must be one residential house in India — but here's the sweet proviso: if your capital gain is ₹2 crore or less, you can buy two houses instead of one, but this two-house option is a once-in-a-lifetime choice — you can never use it again in any future year.
The reinvestment window is generous but has strict timelines. You must purchase the new house within 1 year before or 2 years after the sale date, OR construct it within 3 years after the sale date. Miss these deadlines and the full capital gain becomes taxable. The exemption amount is the lower of: actual capital gain or cost of new house. If you invest less than your gain, only the invested portion is exempt; the rest is taxed. One important lock-in rule: if you sell the new house within 3 years of buying/constructing it, its cost is treated as nil (or reduced by the exempted gain), making the entire sale proceeds taxable — this is the government's way of ensuring you're not gaming the system.
The Capital Gains Account Scheme (CGAS) kicks in when you can't invest the money before filing your return. Deposit the unused capital gain in a CGAS account with a specified bank before the due date of filing your ITR. This amount is then treated as if it were the cost of the new asset. If you don't use the CGAS funds within the original 3-year window, the unutilised amount gets taxed in the year the 3-year period expires. This is asked frequently as a 4-mark question, so know the CGAS mechanism cold.
Example 1 — Full Exemption
Mr. Sharma sells his residential house on 01-Aug-2024. Sale consideration: ₹85,00,000. Indexed cost of acquisition: ₹35,00,000. Long-term capital gain = ₹85,00,000 − ₹35,00,000 = ₹50,00,000.
He purchases a new residential house on 15-Jan-2025 (within 2 years) for ₹60,00,000.
| Particulars | Amount |
|---|---|
| Long-term capital gain | ₹50,00,000 |
| Cost of new house | ₹60,00,000 |
| Exemption u/s 54 (lower of the two) | ₹50,00,000 |
| Taxable capital gain | ₹0 |
Final Answer: Nil capital gain chargeable to tax. Since the entire gain is reinvested, Mr. Sharma pays zero tax on this sale.
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Example 2 — Partial Exemption + CGAS
Ms. Iyer sells her house on 01-Oct-2024. LTCG = ₹80,00,000. She buys a new house worth ₹55,00,000 on 20-Nov-2024. She plans to use the remaining ₹25,00,000 to construct another unit but hasn't done so yet by her ITR due date (31-Jul-2025).
Step 1 — Amount utilised before ITR filing: ₹55,00,000 (purchase)
Step 2 — Balance to be deposited in CGAS: ₹80,00,000 − ₹55,00,000 = ₹25,00,000 (must be deposited before 31-Jul-2025)
Step 3 — Exemption calculation:
| Particulars | Amount |
|---|---|
| LTCG | ₹80,00,000 |
| Cost of new asset (purchase + CGAS deposit) | ₹80,00,000 |
| Exemption u/s 54 | ₹80,00,000 |
| Taxable capital gain | ₹0 |
Final Answer: Nil taxable gain for AY 2025-26. If she fails to use the CGAS ₹25,00,000 within 3 years of sale (i.e., by 01-Oct-2027), that amount will be taxed in AY 2028-29.
📖 Bare Act text — Section 54, Income Tax Act 1961
(click to expand)
(1) Subject to the provisions of sub-section (2), where, in the case of an assessee being an individual or a Hindu undivided family, the capital gain arises from the transfer of a long-term capital asset, being buildings or lands appurtenant thereto, and being a residential house, the income of which is chargeable under the head "Income from house property" (hereafter in this section referred to as the original asset), and the assessee has within a period of one year before or two years after the date on which the transfer took place purchased, or has within a period of three years after that date constructed, one residential house in India, then, instead of the capital gain being charged to income-tax as income of the previous year in which the transfer took place, it shall be dealt with in accordance with the following provisions of this section, that is to say,—(i) if the amount of the capital gain is greater than the cost of the residential house so purchased or constructed (hereafter in this section referred to as the new asset), the difference between the amount of the capital gain and the cost of the new asset shall be charged under section 45 as the income of the previous year; and for the purpose of computing in respect of the new asset any capital gain arising from its transfer within a period of three years of its purchase or construction, as the case may be, the cost shall be nil; or(ii) if the amount of the capital gain is equal to or less than the cost of the new asset, the capital gain shall not be charged under section 45; and for the purpose of computing in respect of the new asset any capital gain arising from its transfer within a period of three years of its purchase or construction, as the case may be, the cost shall be reduced by the amount of the capital gain.Provided that where the amount of the capital gain does not exceed two crore rupees, the assessee, may at his option, purchase or construct two residential houses in India, and where such an option has been exercised,––(a) the provisions of this sub-section shall have effect as if for the words "one residential house in India", the words "two residential houses in India" had been substituted;(b) any reference in this sub-section and sub-section (2) to "new asset" shall be construed as a reference to the two residential houses in India: Provided further that where during any assessment year, the assessee has exercised the option referred to in the first proviso, he shall not be subsequently entitled to exercise the option for the same or any other assessment year.(2) The amount of the capital gain which is not appropriated by the assessee towards the purchase of the new asset made within one year before the date on which the transfer of the original asset took place, or which is not utilised by him for the purchase or construction of the new asset before the date of furnishing the return of income under section 139, shall be deposited by him before furnishing such return [such deposit being made in any case not later than the due date applicable in the case of the assessee for furnishing the return of income under sub-section (1) of section 139] in an account in any such bank or institution as may be specified in, and utilised in accordance with, any scheme which the Central Government may, by notification in the Official Gazette, frame in this behalf and such return shall be accompanied by proof of such deposit; and, for the purposes of sub-section (1), the amount, if any, already utilised by the assessee for the purchase or construction of the new asset together with the amount so deposited shall be deemed to be the cost of the new asset:Provided that if the amount deposited under this sub-section is not utilised wholly or partly for the purchase or construction of the new asset within the period specified in sub-section (1), then,—(i) the amount not so utilised shall be charged under section 45 as the income of the previous year in which the period of three years from the date of the transfer of the original asset expires; and(ii) the assessee shall be entitled to withdraw such amount in accordance with the scheme aforesaid.