Chapter VII - Set Off, or Carry Forward and Set Off of Losses
Section 121
Section 121: submission of return for losses
Section 121 requires a loss to be determined in pursuance of a return filed under Section 263(1) before it can be carried forward and set off under Sections 111(1), 112(1), 113(2), 114(2) or 115(2). Check the named loss category and its separate conditions rather than applying this gate to every loss in the Act.
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Need advice on Section 121?
This article is for general information. Refer to the Income-tax Act, 2025 as amended by the Finance Act, 2026 and the Taxation and Other Laws (Amendment) Act, 2026 for the official provisions. If you need professional advice for your situation, contact Bizeneed.
Statutory text
Bare law
Irrespective of anything contained in this Chapter, no loss which has not been determined in pursuance of a return filed under section 263(1), shall be carried forward and set off under section 111(1) or 112(1) or 113(2) or 114(2) or 115(2).
Introduction
Section 121 makes a timely Section 263(1) return central to carrying forward the specified capital, ordinary-business, speculation, specified-business and race-horse losses. The loss must be determined pursuant to that return for the listed later set-offs.
Key takeaways
Return-linked determination
The loss must have been determined in pursuance of a return filed under section 263(1).
Listed carry-forward provisions
The restriction applies to sections 111(1), 112(1), 113(2), 114(2) and 115(2).
What Section 121 says
"Irrespective of anything contained in this Chapter, no loss which has not been determined in pursuance of a return filed under section 263(1), shall be carried forward and set off under section 111(1) or 112(1) or 113(2) or 114(2) or 115(2)."
In other words, the right to carry forward a loss under Sections 111, 112, 113, 114 or 115 depends on that loss having first been determined on the basis of a return of income filed under Section 263(1).
When this provision applies
Identify the exact loss category before applying the gate. Section 121 names Sections 111(1), 112(1), 113(2), 114(2) and 115(2), rather than every possible deduction, allowance or loss rule in the Act.
The condition concerns a loss determined in pursuance of a return filed under Section 263(1). A bookkeeping entry and an amount merely claimed in a schedule should not be substituted for the qualifying return-linked determination.
Limits and procedural safeguards
Meeting the Section 121 condition is necessary for the listed carry-forwards, but does not by itself establish the permissible number of years, type of income against which set-off is allowed, or every other condition. Read the particular loss provision too.
Do not use this carry-forward rule as a universal answer to current-year set-off or an unlisted category. Filing dates, valid returns and any available statutory remedy need separate analysis of the applicable provisions and case record.
Step-by-step review
1. Classify the loss and identify the exact listed carry-forward provision.
2. Verify the Section 263(1) return and preserve the filing acknowledgement and relevant schedules.
3. Reconcile the loss determined pursuant to that return with the books and claim.
4. For a later-year set-off, apply the source provision’s remaining conditions and track how much of the determined loss remains unused.
Hypothetical example
Hypothetical illustration: a business records a loss of ₹4,00,000, but the loss determined pursuant to its qualifying return is ₹3,00,000. The carry-forward record should use the determined amount, subject to the relevant loss rules, rather than automatically carrying the larger book figure.
Records to prepare
The Section 263(1) return, acknowledgement and loss schedules.
The computation or order determining the loss and any later change.
A category-wise record of eligible carry-forward, utilisation and remaining balance.
Official amended Act source
Practical checklist
Do
- File the loss return under Section 263(1) and retain proof of filing and determined amount.
- Match the loss category to one of the five sections expressly listed before carry-forward.
- The Section 263(1) return, acknowledgement and loss schedules.
- The computation or order determining the loss and any later change.
- A category-wise record of eligible carry-forward, utilisation and remaining balance.
Avoid
- Do not assume every loss category is subject to this exact gate without checking the list.
- Do not carry a listed loss based only on books when no qualifying return determination exists.
Glossary
- Loss return
- A return filed under Section 263(1) from which the eligible loss is determined.
- Carry forward
- Moving a determined unused loss into a later tax year for permitted set-off.
- Determined loss
- The loss established in pursuance of the qualifying return, rather than merely the amount entered in the accounts.
Frequently asked questions
Which loss carry-forward provisions does Section 121 gate?
It covers losses to be carried forward under Section 111(1), 112(1), 113(2), 114(2) and 115(2).
What happens if the return isn't filed under Section 263(1)?
The loss cannot be carried forward and set off under those provisions unless it has been determined on the basis of a return filed under Section 263(1).
Does satisfying Section 121 settle all future set-off conditions?
No. The particular loss provision still governs permitted set-off, duration and other conditions.
Should I automatically carry the loss shown in my accounts?
No. Reconcile it to the loss determined pursuant to the qualifying return and apply the relevant statutory conditions.
Need help applying this provision to your situation?
Get help filing a return under section 263(1) for loss determinationLast updated 10 October 2026