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If income from a particular source is exempt from tax, then loss from such source cannot be set off against any other income which is chargeable to tax.
E.g., Agricultural income is exempt from tax, hence, if the taxpayer incurs loss from agricultural activity, then such loss cannot be adjusted against any other taxable income.​

If in any year the taxpayer has incurred loss from any source under a particular head of income, then he is allowed to adjust such loss against income from any other source falling under the same head.

The process of adjustment of loss from a source under a particular head of income against income from other source under the same head of income is called intra-head adjustment, e.g., Adjustment of loss from business A against profit from business B.​

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Following restrictions should be kept in mind before making intra-head adjustment of loss:

👉 Loss from speculative business cannot be set off against any income other than income from speculative business. However, non-speculative business loss can be set off​ against income from speculative business.

👉 Long-term capital loss cannot be set off against any income other than income from long-term capital gain. However, short-term capital loss can be set off against long-term or short-term capital gain.

👉 No loss can be set off against income from winnings from lotteries, crossword puzzles, race including horse race, card game, and any other game of any sort or from gambling or betting of any form or nature.

👉 Loss from the business of owning and maintaining race horses cannot be set off against any income other than income from the business of owning and maintaining race horses.


Loss from business specified under section 35AD cannot be set off against any other income except income from specified business.​ ( section 35AD​ is applicable in respect of certain specified businesses like setting up a cold chain facility, setting up and operating warehousing facility for storage of agricultural produce, developing and building a housing projects, etc.). ​

​​​​​​​​After making intra-head adjustment (if any) the next step is to make inter-head adjustment. If in any year, the taxpayer has incurred loss under one head of income and is having income under other head of income, then he can adjust the loss from one head against income from other head, E.g.,Loss under the head of house property to be adjusted against salary income.

Restrictions to be kept in mind while making inter-head adjustment of loss
Following restrictions should be kept in mind before making inter-head adjustment:

👉🏻 Before making inter-head adjustment, the taxpayer has to first make intra-head adjustment.

👉🏻 Loss from speculative business cannot be set off against any other income. However, non-speculative business loss can be set off ​against income from speculative business.

👉🏻Loss under head “Capital gains” cannot be set off against income under other heads of income.

👉🏻 No loss can be set off against income from winnings from lotteries, crossword puzzles, race including horse race, card game, and any other game of any sort or from gambling or betting of any form or nature.

👉🏻Loss from the business of owning and maintaining race horses cannot be set off against any other income.

👉🏻 Loss from business specified under section 35AD cannot be set off against any other income ( section 35AD​ is applicable in respect of certain specified businesses like setting up a cold chain facility, setting up and operating warehousing facility for storage of agricultural produce, developing and building housing projects, etc.)

👉🏻 Loss from business and profession cannot be set off against income chargeable to tax under the head “Salaries

​​​​​If loss under the head “Income from house property” cannot be fully adjusted in the year in which such loss is incurred, then unadjusted loss can be carried forward to next year.
​​​The set-off of loss from house property against income from any other source is restricted to Rs. 2 lakh per annum.
​​In the subsequent years(s) such loss can be adjusted only against income chargeable to tax under the head “Income from house property”.
Such loss can be carried forward for eight years immediately succeeding the year in which the loss is incurred.
Loss under the head “Income from house property” can be carried forward even if the return of income/loss of the year in which loss is incurred is not furnished on or before the due date of furnishing the return, as prescribed under section 139(1)​​​​

​​​​If loss of any speculative business cannot be fully adjusted in the year in which it is incurred, then the unadjusted loss can be carried forward for making adjustment in the next year. In the subsequent year(s) such loss can be adjusted only against income from speculative business (may be same or any other speculative business).

Loss from speculative business can be carried forward only if the return of income/loss of the year in which loss is incurred is furnished on or before the due date of furnishing the return, as prescribed under section 139(1)​.

Such loss can be carried forward for four years immediately succeeding the year in which the loss is incurred.
Above provisions are not applicable in case of unabsorbed depreciation of speculative business (provisions relating to unabsorbed depreciation are discussed later).​

​​​​If loss under the head “Capital gains” incurred during a year cannot be adjusted in the same year, then unadjusted capital loss can be carried forward to next year.

In the subsequent year(s), such loss can be adjusted only against income chargeable to tax under the head “Capital gains”, however, long-term capital loss can be adjusted only against long-term capital gains. Short-term capital loss can be adjusted against long-term capital gains as well as short-term capital gains.

Such loss can be carried forward for eight years immediately succeeding the year in which the loss is incurred.

Such loss can be can carried forward only if the return of income/loss of the year in which loss is incurred is furnished on or before the due date of furnishing the return, as prescribed under section 139(1)​.​

​Generally, the person incurring the loss is only entitled to carry forward the loss to be adjusted in subsequent year(s). However, in certain cases of reconstitution of the business like amalgamation, demerger, conversion of proprietary firm into company or conversion of partnership firm into company, etc., the reconstituted entity is entitled to carry forward the unadjusted loss of predecessor entity (provided that conditions specified in this regard are satisfied).

​​​​ Sectio​n 78 contains provisions relating to carry forward and set off of loss in case of change in constitution of a partnership firm due to death or retirement of a partner (i.e. when a partner goes out of firm by retirement or death). In such a case, the share of loss attributable to the outgoing partner cannot be carried forward by the firm.
Restriction of section 78​​ is applicable only in case of loss and is not applicable in case of adjustment of unabsorbed depreciation, unabsorbed capital expenditure on scientific research or family planning expenditure.​

​​​​​As per secti​on 79 of the Income-tax Act, where a change in shareholding has taken place in a previous year in the case of a company, not being a company in which the public are substantially interested, no loss incurred in any year prior to the previous year shall be carried forward and set off against the income of the previous year unless-

On the last day of the previous year the shares of the company carrying not less than fifty-one per cent of the voting power were beneficially held by person who beneficially held shares of the company carrying not less than fifty-one per cent of the voting power on the last day of the year or years in which the loss was incurred.

However, the above condition is not applicable in case of an eligible start up reffered under section 80-IAC​ in case of such start up, loss can be carried forward and set off against the income of the previous year, if all shareholders of such company (who held shares carrying voting power on the last day of the year or years in which loss was incurred) continue to hold the shares on last day of such previous year. [Inserted by the Finance Act, 2017]
Restriction of section 79 is applicable only in case of loss and is not applicable in case of adjustment of unabsorbed depreciation, unabsorbed capital expenditure on scientific research or family planning expenditure.

Further, the provisions of section 79​ are not applicable in case of change in share holding on account of death of shareholder or on account of transfer of shares by way of gift to any relative of the shareholder or change in shareholding in case of an Indian company which is a subsidiary of foreign company, when such foreign company is amalgamated/demerged with another foreign company and 51% or more shareholders of the amalgamating/demerged foreign company continues to be the shareholders of the amalgamated/resulting foreign company and where any change in shareholding in the company takes place pursuant to a resolution plan approved under the IBC.
With an objective to facilitate resolution of distressed companies, the Finance (No. 2) Act, 2019 extend the benefit of secti​on 79​ to the following companies, and their subsidiary and the subsidiary of such subsidiary, where:
(a) ​When NCLT, on a petition moved by the Central Govt., has suspended the board of directors and has appointed new directors.
(b) When change in shareholding has taken place in a previous year pursuant to a resolution plan approved by the Tribunal.​
Note:

W.e.f., Assessment Year 2022-23, the Finance Act, 2021 provides that section 79 not applicable in case there change in the shareholding has taken place during the previous year on account of relocation referred to in the Explanation to clauses (viiac) and (viiad) of section 47