Section 54 Property Reinvestment: Timelines, CGAS and ₹10 Crore Cap

Section 54 applies to an individual or HUF with LTCG from a residential house who purchases another residential house in India within one year before or two years after transfer, or constructs within three years. Unused eligible gain generally requires timely CGAS deposit, and the eligible investment is capped at ₹10 crore.

Legal or Computational Framework

What the search phrase hides

The phrase Section 54 exemption property reinvestment compresses several legal questions into one line. The outcome cannot be trusted until the page identifies the relevant person, transaction, period, source document and statutory exception. A high-quality calculator should therefore show why an amount was accepted or rejected instead of displaying a black-box answer.

Governing framework

The exemption is the lower of eligible LTCG and qualifying investment/deposit, subject to the statutory cap. A one-time two-house election can apply where LTCG does not exceed ₹2 crore. Transfer of the new house within the lock-in period can withdraw or modify relief.

Tax Year 2026–27 means income earned from 1 April 2026 under the Income-tax Act, 2025. AY 2026–27 relates to FY 2025–26 and remains under the Income-tax Act, 1961.

Computation architecture

Step-by-step method

1. Confirm the original asset is a long-term residential house.
2. identify taxpayer and transfer date.
3. measure eligible LTCG.
4. track purchase/construction payments.
5. deposit unutilised amount in CGAS by the statutory due date.
6. monitor completion and lock-in.

Worked example

Residential-house LTCG is ₹72 lakh. The taxpayer buys a new house for ₹50 lakh before the return due date and deposits ₹22 lakh in CGAS. Full relief may be available if all timing, use and lock-in conditions are met. A normal savings account deposit does not substitute for CGAS.

The example is intentionally presented as a calculation trail. The final result must be recomputed when a date, residence test, holding period, asset classification, employee category, notification, treaty or source document changes.

Rate is the final step, not the first

Capital-gain pages often begin with a percentage and therefore miss the decisive work: identifying the asset, statutory acquisition date, transfer event, cost rule, holding period and special deeming provision. A 12.5%, 20% or 30% rate is meaningful only after the gain has been correctly characterised. TDS or STT does not perform that classification.

Transaction-level audit trail

The computation should retain each acquisition lot, corporate action, cost adjustment, transfer expense, loss set-off and exemption allocation. Aggregation should occur only after character and rate are determined. This matters where a single financial year contains equity STCG, equity LTCG, property gain, VDA transactions and brought-forward losses, each with a different tax treatment.

Edge cases that change the answer

• Purchase within one year before sale can qualify: analyse the governing provision and preserve the supporting evidence.
• Construction need not be complete by the return due date but the three-year limit remains: analyse the governing provision and preserve the supporting evidence.
• Joint purchase requires ownership and investment analysis: analyse the governing provision and preserve the supporting evidence.
• Loan-funded purchase can qualify if the taxpayer actually acquires the house: analyse the governing provision and preserve the supporting evidence.
• CGAS withdrawal must follow prescribed use: analyse the governing provision and preserve the supporting evidence.

Cross-check before filing, paying or claiming

1. Confirm that the legal year and transaction date match the rate or rule used.
2. Reconcile gross consideration, gross income or gross benefit—not merely the net bank receipt.
3. Distinguish a deduction or exemption from TDS, TCS, withholding or an employer provision.
4. Keep the original source document and a calculation worksheet.
5. Review interactions with losses, special rates, surcharge, cess, treaty relief or GST.
6. Record the official source and its effective date in the calculation output.

Calculator design standard

The Finin2min calculator linked below should retain the user's original input, display the legally accepted amount, identify the formula and rate, and state the reason for every cap or rejection. Rate-sensitive output should show the applicable tax year or effective date. Where facts cannot be automated—such as treaty PE, beneficial ownership, continuity of service or property valuation—the tool should flag professional review rather than make an unsupported assumption.

Use the Property Purchase All-In Cost Calculator to work through the related inputs before acting.

What Generic Pages Miss

Practical Documentation Checklist

• Original and new property deeds
• LTCG computation
• Construction agreement and payment schedule
• CGAS passbook/deposit proof
• Ownership and joint-investment records
• Completion/possession and lock-in tracker

For the complete rules on this topic, see the core guide: Capital Gains Tax Under the Income-tax Act 2025.

See the broader Income-tax Act 2025 study guide hub for related rules and calculators on this topic.

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