Missing the original income-tax return deadline for Assessment Year 2026-27 does not necessarily close the door on filing your ITR. Taxpayers can still use the belated-return route, subject to the applicable statutory deadline and conditions. However, filing late can have consequences beyond a late-filing fee. One of the most important is the treatment of losses.

This becomes particularly significant for investors who sold shares or mutual funds at a loss, property owners reporting a house-property loss, traders, and business taxpayers. A loss that appears negative today can actually provide a valuable tax benefit in a future year by reducing taxable income or capital gains. But that benefit is governed by specific carry-forward rules, and some losses may lose their future tax value when the return is filed after the original due date.

Understanding the difference before submitting a belated ITR can therefore prevent an unpleasant surprise later.

Belated ITR for AY 2026-27: What Is the Deadline?

If a taxpayer failed to furnish the return within the applicable original due date under Section 139(1), a belated return can generally be filed under Section 139(4).

For AY 2026-27, the Income Tax Department states that a belated return may be furnished on or before 31 December 2026, or before completion of the assessment, whichever is earlier.

Filing a belated return can also attract a fee under Section 234F. The applicable fee is generally:

• ?1,000 where total income does not exceed ?5 lakh

• ?5,000 in other applicable cases

The bigger concern for taxpayers reporting losses, however, may be the loss of their ability to carry certain losses into future assessment years.

Why Carrying Forward a Loss Matters

A tax loss is not always wasted money.

Suppose an investor sells shares during FY 2025-26 and records a capital loss. If that loss cannot be fully adjusted against eligible capital gains in the same year, tax law may permit the unused amount to be carried forward.

The taxpayer may then use that loss against qualifying capital gains arising in subsequent years.

This can substantially reduce the future tax liability.

For example, assume an investor has an eligible ?3 lakh short-term capital loss. If it is validly carried forward and the investor subsequently earns ?4 lakh of capital gains against which the loss can be adjusted, the taxable amount may be reduced significantly.

But this benefit depends on satisfying the conditions prescribed for that category of loss.

Capital Loss: The Biggest Risk When Filing Late

Capital losses deserve particular attention when filing a belated ITR.

Under the applicable rules, an unadjusted capital loss can generally be carried forward for eight assessment years immediately following the assessment year in which the loss arose.

However, the Income Tax Department makes an important condition clear: the return reporting the capital loss must be furnished on or before the applicable due date under Section 139(1) to preserve the carry-forward benefit.

Therefore, if a taxpayer reports a capital loss for AY 2026-27 only through a belated return after the applicable original due date, the unabsorbed capital loss ordinarily cannot be carried forward.

This applies to both short-term and long-term capital losses.

Short-Term Capital Loss vs Long-Term Capital Loss

Understanding how these two categories can be adjusted is equally important.

A Short-Term Capital Loss (STCL) can generally be set off against:

Short-term capital gains, and
Long-term capital gains.

A Long-Term Capital Loss (LTCL) has a narrower scope. It can generally be adjusted only against long-term capital gains.

Where the eligible loss remains unabsorbed, it may normally be carried forward for up to eight assessment years, provided the prescribed timely-return condition has been met.

Example

Suppose a taxpayer has:

Short-term capital loss: ?4 lakh
Eligible short-term capital gain: ?1.50 lakh

The taxpayer may be able to adjust ?1.50 lakh of the loss against the current year's eligible gain.

This leaves ?2.50 lakh unabsorbed.

If the return was filed within the prescribed due date and other conditions are satisfied, that ?2.50 lakh could generally be carried forward.

If the taxpayer files the loss return only after the original due date, however, the ability to carry that remaining capital loss forward can be lost.

That is why investors should not assume that merely reporting a loss in a belated ITR automatically preserves it for future years.

House-Property Loss Gets Different Treatment

The position is different for eligible losses under the head Income from House Property.

A house-property loss can arise, for example, where allowable interest on a housing loan and other permitted adjustments result in a negative income figure under the house-property head.

Unlike capital and ordinary business losses subject to the timely-return condition, eligible house-property loss can generally be carried forward even where the return is furnished after the original Section 139(1) deadline.

The loss can generally be carried forward for up to eight assessment years and, in subsequent years, can be set off against income from house property in accordance with the applicable provisions.

This makes house-property loss one of the important exceptions taxpayers should know when considering a belated return.

Business Losses Also Need Attention

Business taxpayers should be particularly cautious about filing after the original deadline.

Ordinary business losses generally require the return of loss to be furnished within the prescribed due date if the taxpayer wants to carry the unabsorbed amount forward.

Therefore, a taxpayer with a substantial current-year business loss could lose an important future tax benefit by filing late.

For example, imagine a business incurs a ?10 lakh eligible business loss in a difficult financial year. If the conditions for carry forward are satisfied, the loss could potentially be adjusted against eligible business profits in future years.

Failure to comply with the timely-filing requirement can prevent such ordinary business loss from being carried forward.

What About Unabsorbed Depreciation?

Unabsorbed depreciation requires separate treatment and should not simply be grouped together with ordinary business losses.

Income Tax Department guidance recognises that where the loss from business or profession represents unabsorbed depreciation, it is dealt with separately from an ordinary business loss. In the return, unabsorbed depreciation is reported through the relevant Schedule UD mechanism.

Therefore, taxpayers with depreciation-related losses should carefully distinguish between an actual business loss and unabsorbed depreciation before concluding that the entire amount becomes ineligible merely because the return is belated.

Quick Comparison for Belated ITR

Type of Loss	Carry Forward After Belated Return?	General Carry-Forward Period
Short-Term Capital Loss	Generally No	Up to 8 assessment years if timely filed
Long-Term Capital Loss	Generally No	Up to 8 assessment years if timely filed
Ordinary Business Loss	Generally No	Generally up to 8 assessment years if conditions are met
House-Property Loss	Generally Yes	Up to 8 assessment years
Unabsorbed Depreciation	Separate rules apply	Governed separately from ordinary business loss

The precise treatment can depend on the taxpayer's facts, tax regime, type of income and applicable provisions.

Do Not Confuse Current-Year Set-Off With Carry Forward

This is one of the most important distinctions.

Set-off refers to using an eligible loss against income or gains in the current assessment year.

Carry forward means taking the unabsorbed portion of that loss into future assessment years.

A belated return may therefore produce a situation where an eligible loss can still affect the current year's computation, but the remaining unused amount cannot be carried into future years.

Taxpayers should consequently review both calculations separately rather than simply asking whether a loss is "allowed."

What Should You Check Before Filing a Belated ITR?

Before submitting the return, review the nature of every loss carefully.

Check whether the loss arises from listed shares, mutual funds, property, business operations, house property or depreciation. Also verify whether part of the loss can be adjusted against eligible income during the current year.

Investors should pay special attention to short-term and long-term classifications because the set-off rules differ.

Business taxpayers should separately identify ordinary business losses and unabsorbed depreciation.

The ITR schedules dealing with Current Year Loss Adjustment (CYLA), Brought Forward Loss Adjustment (BFLA), Carry Forward Losses (CFL) and, where applicable, unabsorbed depreciation should also be reviewed carefully.

Conclusion

Filing a belated ITR for AY 2026-27 is far better than ignoring the return altogether where filing is required, but late filing can come with consequences that extend beyond the immediate late-filing fee.

For taxpayers with capital or ordinary business losses, missing the original return deadline can potentially eliminate the opportunity to use unabsorbed losses against income in future years. House-property losses receive different treatment and may generally still be carried forward, while unabsorbed depreciation operates under separate rules.

The central lesson is simple: the type of loss matters just as much as the amount of the loss.

Before filing a belated return, taxpayers with significant losses should review the applicable set-off and carry-forward provisions carefully. Where the amounts are substantial or the computation involves multiple income heads, professional tax advice may be appropriate.

Disclaimer: This article is for general informational and educational purposes. Income-tax treatment depends on individual circumstances and applicable law. Taxpayers should verify current provisions and obtain professional advice where required.