How to Set Off and Carry Forward Losses in Taxation

Losses are part of doing business or investing, but the Income Tax Act does not let a bad year go to waste. It gives you a structured way to adjust one year’s loss against other income, and if that is not enough, to carry the balance forward and use it in future years. Understanding this framework, covered under sections 70 to 80 of the Income Tax Act, is essential for anyone studying taxation, and it is just as useful for a small business owner or an investor filing their own return.

What does “set off” of losses actually mean 🔗

Set-off simply means adjusting a loss from one source or head of income against a profit from another. If you run two shops and one makes a profit while the other makes a loss, you do not pay tax on the profit alone; the loss reduces it first. This adjustment happens in two stages: first within the same head of income, and then, if a loss still remains, across different heads. Whatever cannot be absorbed even after this is carried forward to future years.

Step one: Adjustment within the same head 🔗

Under section 70, a loss from one source is first set off against income from another source under the same head, in the same year. A loss from one house property can be adjusted against rental income from another house property. A loss from one business can be adjusted against profit from a different business you run.

Where this rule does not apply 🔗

A few categories are ring-fenced and cannot mix freely even within the same head:

• Speculative business loss: This can be set off only against profit from another speculative business, not against your regular business income.
• Specified business loss: Losses from a business eligible for deduction under section 35AD, such as cold chain facilities or warehousing for agricultural produce, can be set off only against income from another specified business.
• Long-term capital loss: This can be set off only against long-term capital gains, never against short-term gains.

Step two: Adjustment across different heads 🔗

If a loss survives after intra-head adjustment, section 71 allows it to be set off against income under a different head altogether, still within the same financial year. A loss from business, for instance, can reduce your income from house property or other sources.

The exceptions that limit inter-head adjustment 🔗

Notice that salary income is never available to absorb a loss from another head, and capital gains are treated separately from the rest of your income entirely for this purpose.

Step three: Carrying the loss forward 🔗

Once intra-head and inter-head adjustments are done and a loss still remains, it does not simply disappear. It gets carried forward to future assessment years, but each category of loss comes with its own carry-forward period and its own restriction on what it can be set off against later.

The relevant provisions for these rules are spread across section 72 for business losses, section 73 for speculative losses, and section 74 for capital losses. A useful thing to notice here is that once a business loss is carried forward, it does not need to be set off against profit from the same business; profit from any business or profession in a later year can absorb it. Unabsorbed depreciation is the most flexible of all, since it carries forward indefinitely and can reduce almost any head of income.

The conditions that decide whether you can carry forward at all 🔗

File your return on time 🔗

Most students underestimate this rule and it costs real money in practice. Under section 80, a loss can be carried forward only if the income tax return for that year is filed within the due date specified in section 139(1). Miss the deadline, and the right to carry forward business loss, speculative loss, or capital loss is lost, even if the loss itself is perfectly genuine. This condition does not apply to loss from house property or to unabsorbed depreciation, both of which can still be carried forward even with a belated return.

Continuity of ownership matters for companies 🔗

For closely held companies, section 79 adds another layer. If the shareholding pattern changes by more than 49 percent compared to the year the loss was incurred, the company generally loses the right to carry forward that loss. There are carve-outs for changes caused by death of a shareholder, a gift of shares to a relative, or an amalgamation or demerger that meets prescribed conditions. This provision exists mainly to prevent loss-making shell companies from being bought purely to shelter someone else’s profits from tax.

It is also worth knowing that the Income Tax Act, 1961 has been replaced by the Income Tax Act, 2025, effective from 1 April 2026. The underlying logic of intra-head adjustment, inter-head adjustment, and carry forward continues largely unchanged, but you will now find these rules under renumbered sections, and the official transition guidance confirms that losses brought forward from years before this date continue to be governed by the manner prescribed under the old sections.

Putting it together with a simple case 🔗

Suppose in a year you have a business loss of ₹6 lakh, rental income of ₹1 lakh, and a long-term capital gain of ₹2 lakh. The business loss first looks for adjustment within the same head, but there is no other business income here, so it moves to inter-head adjustment. It can absorb the ₹1 lakh rental income fully. It cannot touch the capital gain, because capital gains sit outside the inter-head adjustment available to business losses in that direction is fine, but the mechanics work through section 71 for the ₹1 lakh; the capital gains remain taxable at ₹2 lakh on their own. The remaining ₹5 lakh of business loss is carried forward for up to eight years and can be set off against business profits in those years, subject to the return being filed on time.

What do you think? 🔗

What do you think? If you were advising a friend who runs a small business and also trades in the stock market, which of these silos, speculative loss, capital loss, or ordinary business loss, do you think catches people off guard the most? And do you think the eight-year carry-forward window is generous enough for a genuine startup loss to be fully absorbed before it expires?

References

1. https://www.incometaxindia.gov.in/w/set-off-and-carry-forward-of-losses-under-the-income-tax-law%E2%80%8B
2. https://www.incometaxindia.gov.in/w/section-71-11
3. https://www.incometaxindia.gov.in/w/section-72-44
4. https://www.incometaxindia.gov.in/w/section-73-61
5. https://www.incometaxindia.gov.in/w/section-74-40
6. https://www.incometax.gov.in/iec/foportal/help/all-topics/e-filing-services/set-offcarry-forward-losses