A home loan is one of the largest financial commitments a family makes, and the tax benefits attached to it can make a real difference to its overall cost. But construction loans have their own rules. Deductions are linked to when construction is completed, interest paid before completion is treated differently and the benefits depend on which tax regime you choose. This guide gives a plain-language overview to help you plan and to have better conversations with your tax adviser.
Important: Tax rules change. India's new Income-tax Act, 2025 applies from April 2026 and largely carries forward the home loan provisions with new section numbers, while the familiar references such as Section 24(b) and Section 80C come from the earlier law. This article is a general guide, not tax advice. Please confirm the current rules with a chartered accountant for your situation.
The two main benefits
1. Deduction for interest paid
Interest on a loan taken to construct a house can be deducted from income from house property.
- For a self-occupied house, the deduction has historically been capped at ₹2 lakh per year under the old tax regime.
- For a let-out house, interest is deductible against rental income, but the amount of loss you can set off against other income is limited.
2. Deduction for principal repaid
Under the old tax regime, principal repayment on a home loan has qualified for a deduction within the overall limit of ₹1.5 lakh per year, along with other eligible investments. Stamp duty and registration charges on the property have also been eligible in the year paid.
Old regime vs new regime
The new tax regime offers lower slab rates but removes most deductions.
| Benefit | Old regime | New regime |
|---|---|---|
| Interest on self-occupied house | Deduction up to ₹2 lakh | Not available |
| Interest on let-out house | Deductible against rent, loss set-off limited | Deductible against rent, loss cannot be set off against other income |
| Principal repayment | Within the ₹1.5 lakh limit | Not available |
Which regime is better depends on your income, loan size and other deductions. Many people with large home loans still find the old regime useful; others prefer the simplicity of the new one. Compare both every year with your adviser.
The construction rule: benefits begin after completion
This is the key difference from a loan for a ready home. For a house under construction:
- Interest deduction for the current year starts from the financial year in which construction is completed.
- Principal deduction is generally available only after construction is completed.
So while your house is being built, you pay pre-EMI interest without an immediate deduction.
Pre-construction interest
Interest paid before the year construction is completed is called pre-construction interest. It is not lost. The total is allowed as a deduction in five equal instalments, starting from the year of completion. For a self-occupied house, these instalments count within the overall annual cap along with current-year interest.
Example: You pay ₹5 lakh as pre-EMI interest over two years of construction. From the year of completion, you can claim ₹1 lakh a year for five years as pre-construction interest, in addition to that year's interest, subject to the overall limit for a self-occupied house.
The five-year completion rule
For a self-occupied house, the higher interest deduction has depended on construction being completed within five years from the end of the financial year in which the loan was taken. If construction takes longer, the deduction has been reduced to a much smaller amount. This is one more reason to plan your project carefully and choose a builder who completes on time. See our guide to construction stages and timelines.
Plot plus construction loans
If you took a composite loan, interest on the plot portion has generally been treated as part of the pre-construction interest once the house is built. Interest on a pure plot loan with no house does not get the same benefit. Read our guide to plot plus construction loans.
Joint loans
When a home is jointly owned and the loan is jointly taken, each co-owner who is also a co-borrower and pays the EMI can usually claim deductions separately within their own limits. This can double the available benefit for couples. Ownership in the property documents matters, so plan it before registration.
Rental income homes
If you build a house with rental floors, the tax treatment of the owner's portion and the rented portion can differ. Rental income is taxable after a standard deduction, and interest on the rented portion is deductible against it. See our guide to planning a house with rental floors.
Documents to keep
- Loan sanction letter and disbursement details
- Annual interest and principal certificate from the lender
- Proof of completion date, such as the completion or occupancy certificate. See our OC guide.
- Property registration documents
- Rental agreements, if let out
Top-up loans and interiors
Some homeowners take a top-up loan later to fund interiors or an extension. Whether interest on such loans qualifies for a deduction depends on how the funds are used and the rules in force, so keep records of how the money was spent and ask your adviser.
Practical tips
- Plan to complete construction well within the time allowed.
- Keep a record of pre-EMI interest paid every year.
- Consider joint ownership and joint borrowing if it suits your family.
- Review the old and new regimes each year.
- Keep completion documents safe, since they set the start date for deductions.
How Golden Homes helps
A predictable timeline helps you plan both your loan and your taxes. Our stage-wise schedule and regular updates keep your project on track, and we provide the documents your bank and adviser need. Read our home construction loan guide or talk to our team.
Frequently asked questions
Can I claim tax benefits while my house is under construction?
Generally not for the current year. Deductions begin from the year construction is completed, and pre-construction interest is then claimed in five equal instalments.
Is home loan interest deductible in the new tax regime?
For a self-occupied house, no. For a let-out house, interest is deductible against rental income, but the loss cannot be set off against other income.
What happens if construction takes more than five years?
For a self-occupied house, the interest deduction has been reduced to a much smaller amount. Check the current rules with your tax adviser.
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