If I File ITR Late, Can I Still Claim Old Regime Deductions?

If you file your income tax return after the deadline, it goes in as a belated return, and a belated return is processed under the default new tax regime. So you cannot claim old regime deductions like 80C, HRA, or home loan interest for that year.

The short answer is no. As of July 2026, once you miss the due date under section 139(1), the option to pick the old regime is gone for that assessment year, even when the old regime would have saved you more tax.

Key takeaways

• A belated return is filed under the new regime by default, so old regime deductions are lost for that year.
• The option to choose the old regime must be exercised on or before the due date under section 139(1) (Income Tax Department Form 10-IEA FAQ).
• For most salaried filers, that due date is 31 July 2026 for AY 2026-27; the belated window then runs to 31 December 2026.
• You still keep your refund, but you lose 80C, HRA, and other old-regime deductions and pay a section 234F late fee.
• File on time and the loss simply does not happen. That is the whole fix.

First, what "belated" actually means

A belated return is any return you file after the original due date, but within the extended window the law still allows.

For AY 2026-27, which covers the income you earned in FY 2025-26, the normal due date for most salaried taxpayers is 31 July 2026. Miss it, and you can still file a belated return under section 139(4) up to 31 December 2026.

Here is the catch. The belated return keeps your filing valid and lets you pay tax or claim a refund. But it quietly strips away one important right: the ability to choose your tax regime for that year.

That single loss is what trips up most people, because they assume "late" only means a fee.

Why a late return locks you into the new regime

Since AY 2024-25, the new tax regime is the default under section 115BAC. You are in it automatically unless you actively opt out.

To opt out and use the old regime, the law requires you to exercise that choice on or before the due date specified under section 139(1). File after that date, and the door to the old regime is shut for the year.

The Income Tax Department's Form 10-IEA FAQ puts it plainly: if you fail to opt out within the due date, "you will not be eligible to get the benefit of old tax regime in your ITR."

So this is not a penalty an officer decides case by case. It is built into how the regime choice works. No due date, no old regime.

Do salaried people even need Form 10-IEA?

Short answer: usually no. But the deadline still binds you.

If you have only salary income and file ITR-1 or ITR-2, you do not file Form 10-IEA at all. You simply select the old regime option inside the ITR itself. The Income Tax Department FAQ confirms this. The condition is that you file on or before 31 July 2026.

If you have business or professional income and file ITR-3 or ITR-4, you must file Form 10-IEA to choose the old regime, again by the due date under section 139(1). Filed after the due date, the form is treated as invalid.

Either way, the deadline is the gatekeeper. Not sure which return applies to you? PaisaSeed's guide on which ITR form a salaried person should use for AY 2026-27 walks through it.

Who gets hurt the most

Not everyone loses money here. If the new regime was already better for you, filing late changes nothing on the regime front, though you would still owe the late fee.

The people who feel it are those whose deductions are large enough that the old regime wins. That usually means:

• Salaried people paying rent and claiming HRA under section 10(13A).
• Anyone with a home loan claiming interest under section 24(b).
• Big 80C savers, through EPF, PPF, ELSS, life insurance or children's tuition.
• People with high 80D health insurance premiums or the extra 80CCD(1B) NPS deduction.

If that is you, a late return can cost real money. And if you claim HRA, get it right the first time with PaisaSeed's HRA and rent receipt guide for ITR filing, then file before the due date so the deduction actually counts.

The deadlines that decide everything (AY 2026-27)

Dates matter more than anything else in this topic. Here is the map, as of July 2026.

The line that matters: after 31 July 2026, filing is still possible, but the old regime is not.

What you actually lose: old vs new regime

The new regime removes most deductions in exchange for lower slab rates. Here is what changes if a late return forces you into it.

So the new regime is not deduction-free. The salaried standard deduction is actually higher at Rs 75,000, and employer NPS under 80CCD(2) still counts. But the big personal deductions, 80C, HRA, home loan interest and 80D, all fall away.

A worked example in rupees

Numbers make it real. Take a salaried person in a metro with gross salary of Rs 18 lakh in FY 2025-26 and genuine deductions.

Their old regime picture, if filed on time, looks like this.

Taxable income under the old regime is Rs 10,60,000, and the tax works out to about Rs 1,35,720, including 4% cess.

Now the belated return forces the new regime. Only the Rs 75,000 standard deduction survives, so taxable income becomes Rs 17,25,000, and the tax is about Rs 1,50,800, including cess.

That is roughly Rs 15,000 in extra tax, purely for missing the deadline. Add the section 234F late fee, up to Rs 5,000, and interest under section 234A, and the real cost of one late return crosses Rs 20,000 for this reader.

These are illustrative figures on FY 2025-26 slabs. Your own numbers will differ, and for lower incomes the new regime often wins anyway, so run both before you file.

What you do NOT lose by filing late

Let me be fair, because it is not all bad news.

A belated return is still a valid return. You can still claim a refund if excess TDS was cut, and the department still processes it in the normal way. If a refund feels stuck afterwards, PaisaSeed's guide on ITR refund delays for AY 2026-27 covers what to check. You can also still pay any balance tax and close the year.

But a couple of other things do go, beyond the regime choice:

• Most loss carry-forwards are lost. Business loss and capital loss cannot be carried forward if you file late. House property loss and unabsorbed depreciation are the exceptions that survive.
• You pay section 234A interest at 1% per month on any unpaid tax, on top of the 234F fee.

Can an updated return fix it later?

This is the hopeful question, and the answer is still no.

An updated return (ITR-U) lets you correct or file a return later, but it comes with extra tax and it does not reopen the regime choice. If the original was late, the new regime stands for that year.

A revised return does not rescue you either. If your original return was belated, revising it cannot switch you back to the old regime. Once the due date passes, the regime for that year is settled.

Honestly, there is no clever route back. The only reliable fix sits before the deadline, not after it.

How to avoid getting stuck

Prevention is the entire game here. A few plain habits do the work.

The fix is boring, and that is the point. File before the deadline, pick the regime that saves you the most, and none of this applies to you.

Bottom line

If you file a belated ITR, it defaults to the new regime, so you cannot claim old regime deductions like 80C, HRA or home loan interest for that year. For AY 2026-27, the deciding date for most salaried filers is 31 July 2026. File by then, choose the regime that saves you the most, and the problem never starts. Miss it, and you keep your refund but lose the deductions, plus a late fee. You can continue with PaisaSeed's Tax & ITR guides if you are getting your filing in order.

This article is educational and not tax advice. Tax rules, limits and dates can change and depend on your situation. Verify with the Income Tax Department or a qualified tax professional before you file.