Tax benefits of buying an under-construction property

When you buy an under-construction property like Forbes Fab Luxe Residences, with possession scheduled for December 2028, you begin paying home loan interest before you can move in. Many buyers assume no tax deduction is available until possession. That is wrong — and the rule that governs it, called the pre-construction interest deduction, is one of the most under-utilised tax benefits in Indian residential real estate.

This guide walks through every tax benefit available to an under-construction buyer in 2026. It covers Section 24 (interest), Section 80C (principal), Section 80EE and 80EEA (additional interest for eligible buyers), the five-year rule on pre-construction interest, and the critical rule about possession-year deductions. We also explain how the regime choice (old vs new tax regime) changes the answer.

The five tax deductions available on an under-construction property

Note: all deductions apply only under the old tax regime. Under the new tax regime, Section 80C, 80EE, 80EEA and Section 24(b) deductions for self-occupied property are generally not available. The new regime offers lower slabs in exchange. Which is better depends on your total deduction base — we will cover that below.

The pre-construction interest rule, in plain English

From the date of loan disbursement (first rupee) to 31 March preceding the year of possession, all interest you pay is called "pre-construction interest." You cannot claim it while the property is under construction. Instead, the total pre-construction interest is aggregated and claimed in five equal annual instalments, starting from the financial year of possession.

The ₹2 lakh cap applies to the total

Here is the important catch. The ₹2 lakh annual cap under Section 24(b) for a self-occupied property is a combined cap. It covers: (a) current-year interest, plus (b) the pre-construction interest instalment of that year. So if your current-year interest is already ₹2.5 lakh, you have exhausted the cap and the pre-construction instalment provides no additional deduction that year. For a large luxury home loan, this is very common — which is why the pre-construction benefit is worth more for moderate-ticket loans than very large ones under the self-occupied regime.

When the property is let out, the cap disappears

If the property is let out (rented), Section 24(b) has no upper limit on interest deduction. This is the big quiet benefit for investor-buyers. All interest paid plus one-fifth of pre-construction interest is fully deductible against rental income, with any loss set off against other heads up to ₹2 lakh per year and carried forward for eight years.

Section 80C — principal, stamp duty and registration

Section 80C allows up to ₹1.5 lakh per year as a deduction, including home loan principal repayment and stamp duty plus registration charges paid in the year of registration. But:

• Principal repayment deduction is only available from the year of possession onwards. Principal paid before possession is ignored for 80C.
• Stamp duty and registration can be claimed in the year they are paid, even if that is pre-possession.
• The ₹1.5 lakh cap is shared across all 80C items — EPF, PPF, ELSS, insurance premiums, children's tuition fee, etc. Most salaried buyers exhaust 80C before the home loan principal even reaches it.

Section 80EE and 80EEA — the additional interest slots

Both sections give additional interest deduction over and above the ₹2 lakh Section 24 cap. Eligibility is narrow, tied to specific loan sanction windows and property stamp-duty values. For luxury buyers, 80EEA (which targets affordable housing) is typically not available because it has a stamp-duty value ceiling. 80EE was for loans sanctioned in FY 2016-17 with specific value limits, so it is largely historical today. Check with a tax advisor whether your specific loan sanction falls within any current active window.

Joint home loan — doubling the deduction

If two co-owners take a joint home loan and both are co-borrowers, each can claim the Section 24 interest deduction (up to ₹2 lakh each) and Section 80C principal deduction (up to ₹1.5 lakh each) in their individual returns. The deductions are apportioned based on ownership share and repayment contribution. For a married couple with both working spouses, this effectively doubles the available home loan tax shield.

Old regime vs new regime — which wins?

A rough rule of thumb for a luxury home loan borrower:

• If your total deductions (Section 24 interest + 80C + other 80-series + HRA / standard deduction) exceed around ₹4-4.5 lakh per year, the old regime usually wins
• If your deductions are thin — say, under ₹3 lakh — the new regime's lower slabs usually win
• Post-possession, when you have full Section 24 + one-fifth of pre-construction + 80C principal, deductions typically push past the breakeven
• Rule of thumb: a large under-construction home loan usually tilts the answer toward the old regime in the years just after possession

A three-year-before, three-year-after tax timeline

Year of booking and first disbursement (say FY 2026-27)

• Interest paid: tracked for future aggregation. No deduction this year.
• Stamp duty and registration (if paid this year): claim up to ₹1.5 lakh under 80C
• Principal paid: no deduction

Year before possession (FY 2027-28)

• Interest paid: tracked for future aggregation. No deduction this year.
• Principal paid: no deduction

Year of possession (FY 2028-29)

• Current-year interest: claim up to ₹2 lakh under Section 24
• First instalment of pre-construction interest: claim against the ₹2 lakh cap (combined)
• Principal: eligible under 80C within ₹1.5 lakh combined cap

Years 2-5 after possession (FY 2029-30 to FY 2032-33)

• Continue claiming current-year interest (Section 24) + pre-construction instalment — combined cap ₹2 lakh self-occupied, uncapped if let out
• Principal: 80C continues within the combined cap

Year 6 onwards

• Only current-year interest (Section 24). Pre-construction instalments have finished.
• Principal: 80C continues

Five practical tips

1. Keep every interest certificate from the bank, year by year, from first disbursement onwards. You will need the aggregated pre-construction figure in the possession year.
2. If stamp duty and registration will be paid in a year when your 80C is otherwise unused, plan to pay them in that year — timing can unlock the deduction.
3. For joint ownership, ensure both EMI contributions leave documentary trail (not a single spouse's account for both shares).
4. Model the old-regime vs new-regime decision year by year — the answer can flip in the year of possession.
5. Consult a CA before the year of possession to set the depreciation / let-out declaration correctly — the choice between self-occupied and deemed let-out in the first year can move the tax by a material amount.