Amt of LTCG required to be reinvested on house property sale and subsequent house purchased

Since there is no department clarification on this yet, and capital gains now imply sale price minus acquisition price plus improvements (without indexed cost of acquisition), it is unclear which amount needs to be reinvested for exemption.

Cost of acquisition of the said capital asset.

It seems however the tax utility app ( as some CA friend informed me after checking) does compute the tax as zero if the amt reinvested is post indexation.

Besides, my discussion with various tax consultants, esp the practising ones, also leads me to believe that the paper def of capital gains as stated needs clarification because it does not synchronise with the objective of grandfathering older investments.

So a person can not compute his tax under the 20% indexation option and simultaneously be expected to nonetheless invest the entire balance capital gain basis the new definition( assuming he could not invest the entire capital gain).

And that is the feedback i recd- which got support from AI apps as well- it will depend on the way you choose to compute your capital gains.

If under old system of 20%, then reinvest the diff between sale price and indexed amt, and if under the new system of 12.5%, then it should be the sale amt minus the original cost of acquisition plus improvement ( unindexed).

Though one expert did differ with this view and found it strange how the tax utility app is taking the above view.

The govt/ CBDT  surely must come up with this clarification to avoid hardships later.

My view remains that if rollover is granted, as also grandfathering for old investment exists, then due to the stated policy of non retrospective taxation, the govt should issue suitable clarification rather than letting innocent tax payer suffer later at the hands of someone taking any interpretation different from the commonsensical one.

Under Section 54, you need to reinvest the entire LTCG amount, not just the profit above your indexed cost. If your LTCG is Rs 40 lakh, you need to invest that full Rs 40 lakh in the new residential property within 2 years of sale (or construct within 3 years) to claim the full exemption. If you reinvest only Rs 30 lakh, the remaining Rs 10 lakh stays taxable at 12.5% under the new LTCG rate (or 20% with indexation for properties held before July 23, 2024, under the grandfathering provision). For the full Section 54 eligibility conditions and the AY 2026-27 indexation options, this [capital gains and LTCG guide for AY 2026-27](https://taxgarden.in/blog/capital-gains-tax-india-ltcg-stcg-ay-2026-27) has the updated rules.

For a resident individual or HUF selling land or a building acquired before 23 July 2024, the comparison under section 112 is a tax cap: tax under the amended, non-indexed method is computed, and if tax under the pre-amendment, indexed method is lower, the excess is disregarded. The grandfathering does not make the indexed gain the sole measure for every other provision.

For sections 54, 54F or 54EC, the exemption calculation should therefore be made under the applicable exemption provision using the indexed long-term capital gain where the taxpayer relies on the pre-amendment computation. The reinvestment requirement is not automatically the unindexed gain merely because the post-amendment rate computation is also performed. In particular, section 54F’s “net consideration” test is distinct from the capital-gain figure, so do not equate it with either gain amount. The amendment’s tax-cap wording does leave room for interpretive questions about how the comparison interacts with exemptions; absent specific departmental clarification on that interaction, disclose the alternative computations and document the position adopted.

This comparison is best handled alongside the capital-gains exemption working and reinvestment tracking for the return. Manual reconciliation across indexed and non-indexed computations can be difficult; automation reduces repetitive work while the professional retains control over assumptions and tax positions. At Jir AI, our 2,000+ AI agents and 650+ integrations streamline GST, ITR, TDS, TCS and other compliance workflows, helping reduce manual workload by up to 70%. For a walkthrough of how this can fit your compliance workflow, message us on WhatsApp: https://wa.me/message/3HVOZ7HIY4ESC1