Building a new house before selling the old one: Does Section 54 tax exemption apply? Rules explained

Starting construction before selling your old house does not automatically rule out the Section 54 exemption. Find out when the exemption can apply, the three-year completion rule, CGAS requirements, key risks and documents taxpayers should maintain.

Sheetal Goel
Published19 Aug 2026, 10:54 PM IST
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Started construction of a new house before selling the old one: Can you claim the Section 54 tax exemption? (AI-generated image)
Started construction of a new house before selling the old one: Can you claim the Section 54 tax exemption? (AI-generated image)

Starting construction of a new house before selling an existing residential property does not automatically rule out a Section 54 exemption.

However, the timing of construction, completion, and other conditions can determine whether the tax benefit is available. Here’s what taxpayers need to know.

How does Section 54 work for construction?

Saurabh Kumar, Managing Partner at SK Attorneys, explained that Section 54 is a tax-saving provision that helps reduce or avoid capital gains tax on the sale of a residential property, provided that it was held for more than 24 months. Capital gain is the profit earned when the property is sold for more than its purchase cost.

Varad Kale, Partner at V.V. Kale & Company, stated that Section 54 is available to an individual/HUF on LTCG from the sale of a residential house. The exemption can be claimed by constructing a residential house within three years after the sale.

Kale added that the exemption is generally the lower of the LTCG or the amount invested, subject to the 10 crore cap. Where the LTCG does not exceed 2 crore, the taxpayer has a one-time lifetime option to invest in two residential houses in India instead of one.

Can construction start before selling the old house?

Yes. Kale noted that Section 54 does not prescribe a specific period for starting construction before the sale. However, in his view, construction should not begin more than one year before the sale, as this could invite litigation.

Kumar added that there is no time limit on how early the construction may begin. Courts have focused on the completion date rather than the date construction started.

What if construction starts before sale but finishes within three years?

Kumar explained that Section 54 distinguishes between commencement and completion. If construction starts before the sale but is completed within three years after the sale, the exemption can still apply.

The taxpayer should have evidence that the house was completed and ready for use within the three-year period.

Also Read | Bought co-owner's 50% share in a property? How capital gains work when you sell

When can the Section 54 exemption be denied?

Kale highlighted these key risks:

  • The new house is fully completed before the sale of the old house.
  • Construction is not completed within the prescribed three-year period.
  • The property does not qualify as a residential house in India.
  • The required investment is not properly evidenced.
  • Unutilised capital gains are not deposited in the Capital Gains Account Scheme (CGAS) by the ITR filing due date.

Kumar added that exemption can also be denied if the seller is not an individual or HUF and the new house is sold within three years.

What documents should taxpayers maintain?

Kumar stated that taxpayers should maintain a clear evidentiary trail, including:

  • Sale deed establishing the transfer date
  • Construction agreement and approved building plan
  • Land-title documents
  • Contractor invoices and payment receipts
  • Bank statements tracing construction payments
  • Completion certificate showing completion within three years

What if the house is not completed within three years?

Kale stated that the exemption can be affected to the extent the capital gain remains unutilised, and any amount not utilised within the prescribed period can become taxable.

Kumar explained that if the new house is not completed within three years, any unutilised CGAS balance is treated as LTCG in the year the three-year period expires under Section 54(2). This is a statutory tax consequence, not a penalty.

What if the amount is not utilised by the ITR due date?

Kale explained that any unutilised capital gain by the Section 139(1) return-filing due date should be deposited in CGAS and subsequently used for eligible construction within three years. Payments should be made from CGAS as prescribed.

He added that eligible construction payments already made from the taxpayer’s own funds before the CGAS requirement arises can potentially count as utilisation, depending on the facts and supporting evidence.

Also Read | Switching from regular to direct funds: Watch out for the hidden tax costs

What if construction is completed before selling the old house?

Kumar noted that if construction is fully completed before the sale, the three-year construction rule does not apply. Instead, it must qualify as a purchase within one year before the sale.

“Finishing it more than 1 year prior makes it an existing asset, which can disqualify you if you own other properties,” he noted.

Disclaimer: This is only for informational and educational purposes. Please consult a qualified expert for the latest laws and regulations.

About the Author

Sheetal Goel is a Content Producer at Livemint, where she covers corporate developments, personal finance, business trends, markets, and SEBI-related updates. She focuses on simplifying complex financial concepts and presenting them in a clear, reader-friendly manner, thereby helping audiences better understand investment trends, personal finance, and market developments. Her writing focuses on making finance more accessible to everyday readers while maintaining clarity, accuracy, and relevance. <br><br> She holds a degree in Economics (Hons.) along with an MBA in Finance, which has helped her develop a strong foundation in financial analysis, market understanding, and business reporting. Before joining journalism, she worked with finance and broking firms, where she closely followed market developments, investment strategies, and evolving industry trends. This practical exposure strengthened her understanding of financial markets. She has also written content across multiple formats and platforms, including YouTube, LinkedIn, and Instagram. <br><br> Over time, she has developed expertise in covering market-linked stories, investor-focused topics, and regulatory updates in a simplified yet informative style. She also enjoys reading and listening to Hindi poetry, reflecting her appreciation for literature and creative expression beyond the world of markets and numbers.

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