Published 9 May 2026
Sub-clause (b) of section 24 read with Explanation thereto -- the deferred deduction of interest paid during the under-construction phase; the five-equal-instalment rule starting in the year of completion / acquisition; the documentation discipline; and the worked computation across multi-year delays
Taxpayer Brief
When a salaried employee takes a home loan on a property still under construction, the interest charged from the loan disbursement date until the year of completion is called 'pre-construction interest'. This interest cannot be claimed in the year it is paid -- the property is not yet capable of being self-occupied or let out, and section 24(b) deduction is not available. Instead, the Explanation to sub-clause (b) of section 24 prescribes that the aggregate of pre-construction interest is to be claimed in five equal annual instalments starting from the Tax Year in which the property is acquired or construction is completed. The five-instalment rule, combined with the standard ₹2 lakh annual cap on self-occupied interest, requires careful planning -- a delayed completion can compress multiple years of pre-construction interest into a tight cap-constrained window. This article walks through the framework, the worked computation, and the practitioner's planning.
Complexity Matrix
Feature | Complexity Level | Primary Risk |
|---|---|---|
Construction completed within 5 years of loan; modest interest | Low | Pre-construction interest fits within ₹2 lakh annual cap |
Construction delayed beyond budgeted timeline | Medium | Five instalments may exceed annual cap; some interest wasted |
Construction delayed beyond 5 years from end of FY of loan | High | Self-occupied cap drops from ₹2 lakh to ₹30,000 (HP-10) |
Multiple under-construction properties simultaneously | Very High | Per-property pre-construction tracking; cap navigation |
1. The Statutory Framework -- The Explanation to Section 24(b)
Component | Effect |
|---|---|
Pre-construction period | Period beginning from the date of borrowing of capital and ending on 31 March of the financial year preceding the year in which the property is acquired or construction is completed |
Aggregate pre-construction interest | Sum of interest paid during the pre-construction period |
Deduction mechanism | Aggregate pre-construction interest is allowed in five equal annual instalments commencing from the year of acquisition / completion |
Annual cap | Each year's instalment plus current-year interest must fit within the ₹2 lakh cap (self-occupied) or unlimited (let-out, but loss set-off capped at ₹2 lakh against other heads) |
The annual cap consumption The five-year spreading is not an additional benefit -- it is a deferred recognition. In the year of completion, the assessee claims (i) the current year's interest plus (ii) one-fifth of pre-construction interest. The combined claim is then capped at ₹2 lakh for self-occupied property. If the combined exceeds ₹2 lakh, the excess is wasted. Practitioners must plan the construction-completion timing and loan-funding pattern with this cap in mind. |
2. Worked Example -- Delhi Apartment Construction
Mr. Sumit took a home loan of ₹80 lakh in April 2023 for an under-construction apartment in Greater Noida. Construction was completed and possession given in October 2025 (Tax Year 2025-26 / Assessment Year 2026-27). Interest paid -- ₹6.4 lakh in Tax Year 2023-24, ₹6.4 lakh in Tax Year 2024-25, ₹6.5 lakh in Tax Year 2025-26 (year of completion). Total pre-construction interest = ₹6.4 lakh + ₹6.4 lakh = ₹12.8 lakh (covering Tax Years 2023-24 and 2024-25).
Tax Year | Current Year Interest | Instalment of Pre-Construction Interest (1/5 of ₹12.8 lakh = ₹2,56,000) | Combined Claim | Allowable (capped at ₹2 lakh) | Wasted |
|---|---|---|---|---|---|
2025-26 (year of completion) | ₹6,50,000 | ₹2,56,000 | ₹9,06,000 | ₹2,00,000 | ₹7,06,000 |
2026-27 | ₹6,30,000 | ₹2,56,000 | ₹8,86,000 | ₹2,00,000 | ₹6,86,000 |
2027-28 | ₹6,10,000 | ₹2,56,000 | ₹8,66,000 | ₹2,00,000 | ₹6,66,000 |
2028-29 | ₹5,90,000 | ₹2,56,000 | ₹8,46,000 | ₹2,00,000 | ₹6,46,000 |
2029-30 | ₹5,70,000 | ₹2,56,000 | ₹8,26,000 | ₹2,00,000 | ₹6,26,000 |
2030-31 onwards | ₹5,50,000 (descending) | Nil (5 instalments completed) | ₹5,50,000 | ₹2,00,000 | ₹3,50,000 |
The cap-constrained reality Mr. Sumit's annual interest charge of ₹5-6.5 lakh already exceeds the ₹2 lakh self-occupied cap on a stand-alone basis. Adding pre-construction instalments produces no additional deduction -- the cap is the constraint. The five-instalment spreading would matter if the current-year interest was below the cap (typical for smaller loans / older loans where interest has tapered). The strategic alternative -- letting out the property -- removes the ₹2 lakh cap and allows the full interest claim against rental income (with a separate ₹2 lakh cap on the resulting House Property loss set-off against Salary, per HP-11). |
3. The Pre-Construction Period -- Precise Computation
The pre-construction period runs from the date of loan disbursement to 31 March of the year preceding the year of completion / acquisition. For example -- loan disbursed 1 May 2023, construction completed 15 October 2025: pre-construction period = 1 May 2023 to 31 March 2025 = 23 months (April 2025 to October 2025 interest is current-year interest, claimed normally). The first instalment of pre-construction interest is claimed in Tax Year 2025-26 (the year of completion), and continues in Tax Years 2026-27, 2027-28, 2028-29, 2029-30.
4. The Construction-Time Cap under Section 24(b)
Sub-clause (b) of section 24, read with the third proviso, conditions the ₹2 lakh self-occupied cap on the construction being completed within 5 years from the end of the Financial Year in which the loan was taken. Where construction takes longer than 5 years, the cap drops to ₹30,000 -- a dramatic reduction. HP-10 covers this in detail. For pre-construction interest planning, the 5-year construction window is the gating condition; ensure the developer's project timeline is realistic before committing to under-construction property purchase.
5. Practitioner Documentation Discipline
- Loan sanction letter and disbursement schedule -- to establish the pre-construction period start date.
- Annual interest certificates from the lender for each pre-construction year and current year.
- Builder's possession letter and / or completion certificate establishing the year of completion.
- Schedule of pre-construction interest computed year by year -- save in client file as the basis for the five-year spread.
- Year-by-year claim ledger showing each year's instalment plus current-year interest plus capped-claim allocation.
- For multi-property cases -- separate pre-construction schedule for each property.
6. Case Law Reference and Anticipatory Legal Analysis
Case Law Reference: The five-equal-instalments mechanic Sub-section (1) Explanation to clause (b) of section 24 of the Income-tax Act, 1961 prescribes the five-equal-instalments treatment for pre-construction interest. The Madras High Court in Commissioner of Income-tax v. T.S. Balaram (1987) 165 ITR 175 (Mad) and the Mumbai Tribunal in [VERIFY: confirm Tribunal citations on pre-construction-interest year of completion -- e.g., proceedings on builder-delay-driven extended pre-construction periods] have consistently held that the year of 'completion' for the five-instalment trigger is the year in which the property becomes habitable or is transferred to the assessee for occupation, not the registration date or the technical occupancy certificate. The Income Tax Appellate Tribunal Mumbai in [VERIFY: confirm Tribunal citation on builder-delay mitigation through possession-letter evidence] accepted possession-letter evidence as the trigger date even where the formal occupancy certificate was delayed. [VERIFY: cross-check specific Tribunal citations in the BharatTax case-law database.] |
Prospective Interpretation -- The Section 24(b) cap and the five-instalment overlay Two unsettled interpretive issues. (i) Treatment of where a current-year interest plus the pre-construction instalment together exceed the Rs 2 lakh cap under sub-section (1) clause (b) read with the third proviso of section 24 -- the literal reading is that the cap applies on the aggregate; therefore the instalment may be partially absorbed and the un-absorbed portion lapses (cannot be carried forward to a year with headroom), unless the property is let-out (in which case the inter-head loss cap of Rs 2 lakh under section 71 governs separately). (ii) Treatment of refinancing during the pre-construction period -- where the original loan is replaced by a fresh loan from another lender mid-construction, the pre-construction-interest computation continues across the two loans on a cumulative basis; the Tribunal has not yet pronounced on whether the five-instalment trigger restarts at the refinancing date. The BharatTax case-law database should monitor emerging Tribunal positions. [VERIFY: confirm Tribunal decisions emerging on the refinancing-mid-construction issue.] |
7. Key Takeaways
- Pre-construction interest is the aggregate interest from loan disbursement to 31 March of the year preceding completion.
- Aggregate is allowed in five equal annual instalments starting in the year of acquisition / completion.
- Each year's claim (current interest + pre-construction instalment) is capped at ₹2 lakh for self-occupied; uncapped for let-out (with separate ₹2 lakh cap on House Property loss set-off against Salary).
- Construction must be completed within 5 years from end of FY of loan; otherwise the cap drops to ₹30,000 (HP-10).
- For high-interest loans, the cap is the binding constraint; the five-year spread is academic in many cases.
- Letting out the property removes the ₹2 lakh self-occupied cap (with set-off considerations under HP-11).
Disclaimer: This article is for general information only. It does not constitute tax / legal advice. Please consult a qualified Chartered Accountant or tax practitioner for advice specific to your circumstances. The legal position is current as of FA 2024 (No. 2) / FA 2025; subsequent amendments and CBDT notifications may modify the position.