Pre-Construction Period Home Loan Interest Deduction Under Section 24(b): The 5-Year Instalment Rule Explained

If you bought an under-construction flat with a home loan, you are paying EMIs for a property you cannot occupy or rent out yet. The tax law does not let you claim that interest immediately, but it does not let it go to waste either. It gets deferred and spread over five years after possession.

Thousands of Indian home buyers take loans for under-construction properties. The EMI starts from the first disbursement, but the property is not "completed" for tax purposes until you get possession or a completion certificate. The interest paid between these two dates sits in a special bucket called "pre-construction period interest", and Section 24(b) has a specific mechanism to handle it: aggregate the total, divide by five, and claim one instalment per year alongside your regular interest. The catch is that this instalment is not unlimited. It falls within the same Rs 2,00,000 cap (for self-occupied property) as your current year interest, and if your builder delivers late, the cap can shrink to Rs 30,000.

This guide covers every aspect of the pre-construction interest calculation: what counts, how to split it, what happens when the cap bites, and how to report it correctly in your ITR.

Looking for expert help with pre-construction period home loan interest deduction Section 24(b)? The team at Tax Garden, based in Kondapur, Hyderabad, helps Indian SMEs stay compliant end-to-end: filings, notices, and advisory, all in one place.

What Is the "Pre-Construction Period"?

The pre-construction period is the duration from the date of borrowing (when the bank first disburses the loan or part of it) to the date of completion of construction or the date of acquisition, whichever is earlier.

For a flat purchased from a builder, "completion" means one of these:

• The date on the possession letter issued by the builder.
• The date on the occupancy certificate or completion certificate issued by the local municipal authority.
• Whichever is earlier if dates differ.

Interest paid during this entire window is your pre-construction period interest. This includes interest on any partial disbursements, even if you paid only pre-EMI interest (interest-only payments before full EMI conversion).

What does NOT count as pre-construction interest

• Principal repayment during the construction period. Only the interest component qualifies.
• Interest on a personal loan or credit card used for the down payment. The borrowing must be specifically for acquisition or construction of the property.
• Interest paid after the year of completion. That is regular current-year interest, claimed directly under Section 24(b).

How the 5-Instalment Rule Works

Section 24(b) says that interest relating to the pre-construction period shall be deducted in five equal annual instalments, commencing from the financial year in which the property is acquired or construction is completed.

The mechanism:

1. Aggregate all interest paid from the date of first loan disbursement to 31 March of the financial year immediately before the year of completion (or to the actual date of completion if you want to be precise; in practice, banks report the interest for the full financial years in their certificate).
2. Divide the total by 5. This is your annual pre-construction instalment.
3. Claim one instalment each year for 5 consecutive financial years, starting from the FY of completion.
4. Add each year's instalment to the current year's interest for the Section 24(b) computation. The combined amount is subject to the applicable cap.

The 5 instalments are rigid. You cannot accelerate them (claim all five in one year) or defer them (skip a year and add it later). If you miss claiming an instalment in a particular year, that year's share is simply lost.

The 5-Year Completion Window

This is where many home buyers get caught. Section 24(b) imposes a separate condition: the construction or acquisition must be completed within 5 years from the end of the financial year in which the capital was borrowed.

If this 5-year deadline is met, the self-occupied interest deduction cap is Rs 2,00,000 per year. If the deadline is missed, the cap drops to Rs 30,000 per year.

Why does this matter for pre-construction interest?

When your builder is running late, two things go wrong simultaneously:

• Your pre-construction period stretches, so the total pre-construction interest grows larger.
• The per-year cap shrinks from Rs 2,00,000 to Rs 30,000, so you can deduct far less.

The net result is that delayed projects leave most of the interest permanently non-deductible for self-occupied property.

Example: 5-year window breach

Rohan took a home loan in July 2020 (FY 2020-21). The 5-year window runs until 31 March 2026. If the builder hands over possession by 31 March 2026, Rohan gets the Rs 2,00,000 cap. If possession is delayed to April 2026, the cap drops to Rs 30,000 per year, and his pre-construction instalment plus current interest can never exceed Rs 30,000 annually. On a Rs 50 lakh loan at 8.5%, that means deducting roughly Rs 30,000 out of Rs 4,25,000+ of annual interest.

Worked Examples

Example 1: Standard pre-construction claim

Facts:

• Loan taken: April 2022 (FY 2022-23).
• Construction completed: June 2025 (FY 2025-26).
• Total pre-construction interest (April 2022 to March 2025): Rs 5,00,000.
• Current year interest (FY 2025-26): Rs 2,10,000.
• Property: self-occupied.
• 5-year window: ends 31 March 2028. Construction completed well within the window.

Calculation:

Pre-construction instalment = Rs 5,00,000 / 5 = Rs 1,00,000 per year

In this scenario, the borrower's combined interest exceeds Rs 2,00,000 in every year. The pre-construction instalment adds Rs 1,00,000 per year, but the deductible amount stays at Rs 2,00,000. Effectively, Rs 1,10,000 is lost in FY 2025-26, reducing year by year as current interest drops. This is common for large loans; the pre-construction instalment provides additional deduction only when current-year interest is below Rs 2,00,000.

Example 2: Joint home loan with pre-construction interest

Facts:

• Amit and Priya (spouses) jointly own a flat, 50:50 ownership.
• Joint home loan, 50:50 EMI sharing.
• Loan taken: October 2021 (FY 2021-22).
• Construction completed: August 2025 (FY 2025-26).
• Total pre-construction interest: Rs 8,40,000.
• Current year interest (FY 2025-26): Rs 3,20,000.
• Property: self-occupied.

Calculation:

Each co-owner's share:

• Pre-construction interest: Rs 8,40,000 x 50% = Rs 4,20,000 each.
• Pre-construction instalment: Rs 4,20,000 / 5 = Rs 84,000 per year each.
• Current year interest share: Rs 3,20,000 x 50% = Rs 1,60,000 each.

Amit's claim in FY 2025-26: Rs 1,60,000 + Rs 84,000 = Rs 2,44,000, capped at Rs 2,00,000. Priya's claim in FY 2025-26: Rs 1,60,000 + Rs 84,000 = Rs 2,44,000, capped at Rs 2,00,000.

Combined household deduction: Rs 4,00,000. Without the joint loan, a single borrower would be capped at Rs 2,00,000.

Example 3: Pre-construction interest on a let-out property

Facts:

• Deepa took a home loan in January 2023 (FY 2022-23).
• Construction completed: March 2026 (FY 2025-26).
• Total pre-construction interest: Rs 6,00,000.
• Current year interest (FY 2025-26): Rs 3,50,000.
• The property is let out from April 2026. Annual rent: Rs 4,80,000. Municipal taxes: Rs 15,000.

Calculation for FY 2026-27 (the first full year of let-out):

Pre-construction instalment: Rs 6,00,000 / 5 = Rs 1,20,000.

• NAV: Rs 4,80,000 minus Rs 15,000 = Rs 4,65,000.
• Standard deduction 24(a): 30% of Rs 4,65,000 = Rs 1,39,500.
• Interest under 24(b): Rs 3,50,000 (current) + Rs 1,20,000 (pre-construction instalment) = Rs 4,70,000.
• Income from house property: Rs 4,65,000 minus Rs 1,39,500 minus Rs 4,70,000 = loss of Rs 1,44,500.

For let-out property, there is no Rs 2 lakh cap on the interest deduction itself. The entire Rs 4,70,000 is deductible against rental income. The resulting loss of Rs 1,44,500 can be set off against Deepa's salary or other income up to Rs 2,00,000 per year (here the loss is within the limit, so fully set off).

This is the key difference: on a self-occupied property, the Rs 2,00,000 cap bites on the interest; on a let-out property, the full interest is deductible, and the separate cap applies only to the resulting loss set-off.

Old Regime vs New Regime: Impact on Pre-Construction Interest

This is the single biggest factor that determines whether your pre-construction interest delivers any tax benefit at all.

Comparison

Pre-Construction Interest: Old Regime vs New Regime

Treatment under Section 115BAC for FY 2026-27

Parameter	Old Tax Regime	New Tax Regime (115BAC)
Self-occupied: Section 24(b) interest	Allowed up to Rs 2,00,000/year	Not allowed
Self-occupied: pre-construction instalment	Allowed (within Rs 2L combined cap)	Not allowed (wasted)
Let-out: Section 24(b) interest	Full interest, no cap	Full interest, no cap
Let-out: pre-construction instalment	Allowed (added to current interest)	Allowed (added to current interest)
Loss from HP set-off	Up to Rs 2,00,000 vs other heads	No inter-head set-off
Section 80C (principal)	Up to Rs 1,50,000/year	Not allowed

Takeaway: If your under-construction property is self-occupied, the old regime is the only way to claim pre-construction interest. If it is let-out, both regimes allow the interest deduction, but only the old regime permits the loss set-off against salary.

Source: Section 24(b), Section 115BAC, Income Tax Act 1961; Section 23(b), Income Tax Act 2025

What happens if you are on the new regime with a self-occupied property?

Your pre-construction interest is entirely wasted. Section 24(b) deduction on self-occupied property is blocked under Section 115BAC. Since pre-construction interest is a subset of Section 24(b), it is blocked too. You cannot defer the instalments; the 5-year claim window runs regardless of your regime choice. If you switch to the old regime in, say, year 3 of the instalment window, you can claim that year's instalment, but instalments from years 1 and 2 (when you were on the new regime) are permanently lost.

For a detailed regime comparison, see our old vs new tax regime comparison guide.

How to Claim Pre-Construction Interest in Your ITR

Pre-construction interest is reported under the head "Income from House Property" in Schedule HP of your ITR. Here is the step-by-step process.

Step-by-Step Guide

Claiming Pre-Construction Interest in ITR

1

Get the bank interest certificate

Request the annual interest certificate from your lender. It shows total interest paid during the financial year and, separately, the pre-construction period interest. Some banks issue a consolidated certificate; ask for a breakup if needed.

2

Calculate the pre-construction instalment

Add all interest paid from the first disbursement to 31 March of the FY before completion. Divide by 5. This is your annual instalment.

3

Open Schedule HP in your ITR form

In ITR-1 (Sahaj) or ITR-2, go to Schedule HP. Select the property type (self-occupied or let-out). Enter the property details.

4

Enter current year interest

In the 'Interest payable on borrowed capital' field, enter the interest paid for the current financial year as shown on the bank certificate.

5

Enter pre-construction instalment separately

There is a specific field for '1/5th of the interest for the pre-construction period'. Enter the annual instalment here. The ITR utility adds this to the current year interest automatically.

6

Verify the total and cap

For self-occupied property, the system caps the total interest deduction (current + pre-construction instalment) at Rs 2,00,000. For let-out, the full amount is deducted from NAV.

Source: ITR-1 and ITR-2 utility, incometax.gov.in

The ITR forms for AY 2026-27 use ITR-1 (Sahaj) for salaried individuals with one house property, or ITR-2 if you have more than one property or capital gains. For a full Schedule HP walkthrough, see our Schedule HP filing guide.

Section 24(b) Under the Income Tax Act 2025

The Income Tax Act 2025 (effective from Tax Year 2026-27) reorganises section numbers. Section 24(b) of the old Act is now covered under Section 23(b) of the new Act. The substance remains the same:

• Interest on borrowed capital for acquisition or construction is deductible.
• The Rs 2,00,000 cap on self-occupied property continues.
• The 5-instalment rule for pre-construction interest continues.
• The 5-year completion deadline continues.

If you are filing for FY 2025-26 (AY 2026-27), use the Section 24(b) reference. For FY 2026-27 (TY 2026-27) onwards, the reference shifts to Section 23(b).

Documents You Need for Pre-Construction Interest Claims

Keep these documents organised by financial year. An assessing officer can ask for any of them during scrutiny.

• Home loan interest certificate from the bank. This must show the pre-construction period interest separately. If it does not, request a specific breakup letter from the bank mentioning dates and interest amounts for each financial year before completion.
• Loan sanction letter. This establishes the date of borrowing, which marks the start of the pre-construction period.
• Possession certificate or completion certificate. This establishes the end of the pre-construction period and the start of the 5-instalment window. Without this document, you cannot begin claiming the instalments.
• Builder's allotment letter or sale agreement. Confirms property ownership and the nature of the transaction (under-construction purchase).
• Bank statements showing EMI or pre-EMI interest debits, especially useful if the bank certificate does not break down pre-construction interest clearly.
• Co-ownership deed (if applicable) showing ownership shares for joint loan claims.

Common Mistakes and How to Correct Them

1. Claiming pre-construction interest before the year of completion

The instalment window opens only in the FY when you receive possession or the completion certificate is issued. If you paid Rs 3 lakh in interest during construction and your flat is still under construction, you cannot claim anything yet. Claiming it early leads to a mismatch with Form 26AS/AIS and potential notice from CPC.

2. Forgetting to split into 5 instalments

Some taxpayers claim the entire pre-construction interest in one lump sum in the year of possession. This is incorrect. The law mandates five equal instalments. CPC's automated processing may reject the excess, or worse, allow it and then send an intimation under Section 143(1) with a demand.

3. Missing the Rs 30,000 cap when construction exceeds 5 years

If your builder delivered 6 years after the loan was taken, the interest cap drops to Rs 30,000 per year. Many taxpayers continue to claim Rs 2,00,000 and receive a notice. Check the dates on your sanction letter and possession certificate before filing.

4. Not having a possession or completion certificate

Without documentary proof of the completion date, you cannot establish when the pre-construction period ended or when the instalment window began. Some builders delay issuing possession letters. Follow up aggressively, because without this document, the deduction is stuck.

5. Exceeding the Rs 2,00,000 cap with combined interest

The pre-construction instalment and the current year interest together cannot exceed Rs 2,00,000 for self-occupied property. The excess is lost forever for that year; it cannot be carried forward.

6. Not keeping the bank's pre-construction interest certificate

Banks issue interest certificates annually, but pre-construction interest needs a cumulative certificate covering all years from disbursement to completion. If you lose the individual year certificates and the bank does not issue a consolidated one, reconstructing the figure becomes difficult.

7. Claiming pre-construction interest on self-occupied under the new regime

Section 24(b) on self-occupied property is blocked under the new regime. The pre-construction instalment, being part of Section 24(b), is also blocked. If you file under the new regime, this deduction is zero regardless of what the bank certificate says.

8. Ignoring the instalment in years when current interest alone exceeds Rs 2 lakh

Even when the pre-construction instalment makes no practical difference (because current interest already hits the Rs 2L cap), you should still report it in the ITR. The instalment window runs for exactly 5 years. Not reporting it does not defer it; it simply lapses.

Pre-Construction Interest on Let-Out Property: Special Treatment

For a let-out property, the dynamics change substantially. The pre-construction instalment is added to current year interest and the combined amount is deducted from the Net Annual Value. There is no Rs 2,00,000 cap on the interest deduction itself for let-out property.

However, a related cap applies: if the resulting loss from house property exceeds Rs 2,00,000, only Rs 2,00,000 can be set off against other income (salary, business, etc.) in that year. The balance is carried forward for up to 8 assessment years, adjustable only against future house property income.

This means pre-construction interest on a let-out property is never "wasted" in the way it can be on a self-occupied property. It either reduces rental income in the current year or creates a loss that is carried forward. For borrowers with large pre-construction interest and modest rental income, this carry-forward can deliver tax savings over multiple years.

For a complete treatment of income from house property, see our Schedule HP filing guide.

Where Tax Garden Helps

Pre-construction interest involves multiple moving parts: identifying the exact pre-construction period from the bank's certificate, computing the correct instalment, tracking which instalment year you are in, splitting shares for joint loans, and choosing the right tax regime to ensure the deduction is not wasted. Tax Garden's tax compliance services handle this end to end. We review your loan documents, compute the instalment, determine whether pre-construction interest delivers any benefit under your current regime, and file the correct figures in Schedule HP. For broader home loan tax benefits, see our complete home loan deduction guide and the Section 24(b) deep dive.

Looking for expert help with home loan interest deduction under construction property ITR filing? The team at Tax Garden, based in Kondapur, Hyderabad, helps Indian SMEs stay compliant end-to-end: filings, notices, and advisory, all in one place.

Frequently Asked Questions

What is the pre-construction period for home loan interest purposes?

The pre-construction period runs from the date of first loan disbursement to the date of completion of construction or possession, whichever is earlier. Interest paid during this period is aggregated and deducted in 5 equal annual instalments starting from the financial year of completion.

Can I claim the entire pre-construction interest in one year?

No. The law mandates that pre-construction interest must be claimed in 5 equal annual instalments. You cannot accelerate, defer, or lump them together. Each year's instalment is added to the current year interest and is subject to the applicable cap.

What happens if my builder delivers after 5 years from the loan date?

If construction is not completed within 5 years from the end of the financial year in which the loan was taken, the Section 24(b) cap on self-occupied property drops from Rs 2,00,000 to Rs 30,000 per year. This applies to both current year interest and the pre-construction instalment combined.

Is pre-construction interest deductible under the new tax regime?

For self-occupied property, no. Section 24(b) on self-occupied property is blocked under the new regime (Section 115BAC), so the pre-construction instalment is also blocked. For let-out property, the deduction is available in both regimes.

How does pre-construction interest work in a joint home loan?

Each co-owner who is also a co-borrower aggregates their share of pre-construction interest (in proportion to ownership) and claims 1/5th of that share each year. If ownership is 50:50, each co-owner calculates instalments on 50% of the total pre-construction interest.

What if pre-construction instalment plus current year interest exceeds Rs 2 lakh?

For self-occupied property, the combined amount is capped at Rs 2,00,000. The excess is not deductible and cannot be carried forward. For let-out property, there is no cap on the interest deduction, but the resulting loss from house property can only be set off up to Rs 2,00,000 against other income.

Where do I enter pre-construction interest in the ITR form?

In Schedule HP of ITR-1 or ITR-2. There is a specific field for '1/5th of interest for the pre-construction period'. Enter the annual instalment there; the utility adds it to the current year interest automatically.

What is Section 23(b) of the Income Tax Act 2025?

Section 23(b) is the new section number under the Income Tax Act 2025 that replaces Section 24(b) of the old Act. The substance is identical: interest on borrowed capital for house property is deductible, with the same caps and pre-construction instalment rules.

Sources

This guide is verified against Section 24(b) of the Income Tax Act 1961, Section 23(b) of the Income Tax Act 2025, and the published ITR-1/ITR-2 utility instructions for AY 2026-27 on incometax.gov.in. The 5-year completion window, the Rs 2,00,000 and Rs 30,000 caps, and the pre-construction instalment mechanism are confirmed from the bare text of Section 24 read with Explanation 2. Confirmatory practitioner coverage from ClearTax, Tax2Win, BankBazaar, and the ICAI Journal of Practice was reviewed. Regime treatment is verified against Section 115BAC as amended by the Finance Act 2023. Always reconcile the figures with your bank's pre-construction interest certificate and possession letter before filing.