Set-Off and Carry Forward of Losses: How the Rules Actually Work

Most people treat a loss as something that simply reduces their tax bill wherever it's convenient: a bad year in the stock market netted against salary, or a loss-making side business set against rental income, however the numbers work out best. The Income Tax Act doesn't work that way. Losses are set off in a fixed sequence, first against other income within the same head, then, only where the law allows it, against other heads entirely, and several categories of loss are blocked from ever leaving the head they arose in. Get the sequence or the restrictions wrong and you either lose a set-off you were genuinely entitled to, or claim one you weren't, which surfaces later as exactly the kind of mismatch that draws a notice. Here's how the mechanism actually works, what can offset what, and the one filing deadline that decides whether an unused loss survives to be used at all.

The Two-Stage Order: Same Head First, Then Other Heads

Set-off happens in two stages, and the order isn't optional. The first stage is inter-source set-off under Section 70: a loss from one source is set off against income from another source within the same head of income, in the same year. A loss on one rental property, for instance, is first set off against income from a second rental property before anything else happens. Only once that stage is complete, and only if the net result for that head is still a loss, does the second stage even come into play.

The second stage is inter-head set-off under Section 71: the net loss remaining under one head is set off against income from other heads altogether, still within the same year. A net business loss, for example, can be set off against interest income taxed under 'income from other sources', or against rental income, if nothing is left within the business head itself to absorb it. This is where most of the restrictions actually bite, since several kinds of loss are barred from inter-head set-off entirely and stay confined to their own head no matter how large they grow.

One more sequencing rule sits underneath both stages. Within whichever set-off you're working through, the current year's loss is always set off before any loss you've brought forward from an earlier year. A brought-forward loss doesn't jump the queue ahead of a fresh one; it only gets its turn after the current year's numbers are settled.

What Can Offset What: The Restrictions That Actually Matter

Four restrictions cause more confusion, and more wrongly filed returns, than anything else in this part of the law.

Capital gains never leave the capital gains head. A loss under 'capital gains', short-term or long-term, cannot be set off against any other head of income at all: not salary, not business income, not rental income. It can only be set off within capital gains itself, and even there it isn't symmetric, as covered in more depth in our guide to capital gains tax on property and shares: a short-term capital loss can be set off against both short-term and long-term capital gains, but a long-term capital loss can only be set off against long-term capital gains, never against a short-term gain.

Speculative business loss is quarantined to speculative business income. A loss from a speculative business, broadly, transactions in shares or commodities settled without actual delivery, can only be set off against profit from another speculative business, in the same year or later. It cannot be set off against your non-speculative business profit, and it certainly cannot be set off against salary or house property income.

House property loss can leave its head, but only up to a cap. Unlike capital or speculative losses, a loss from house property can be set off against other heads of income, salary included, but only up to ₹2,00,000 in a year, a computation we walk through in full in our guide to how rental income is actually taxed. This cap applies regardless of how large the actual loss is: a ₹5,00,000 loss still offsets only ₹2,00,000 of other income that year, with the remaining ₹3,00,000 carried forward.

Business loss can go almost anywhere except salary. A non-speculative business loss is the most flexible of the four: in the year it arises, it can be set off against any other head of income, house property, capital gains, other sources, with one specific exclusion. It cannot be set off against salary income. That exclusion holds regardless of which tax regime you're under; it isn't a new-regime restriction, it's a general rule under Section 71.

Notice the pattern across all four. The more a loss resembles ordinary business or property income, the more places it's allowed to go. The more it resembles a gain on an asset you hold, capital or speculative, the more tightly it stays fenced into its own head.

How Long You Can Carry a Loss Forward

A loss you can't fully use in the year it arises doesn't vanish. It carries forward, but for a limited number of years, and once carried forward it can usually be set off against a narrower slice of income than it could in the year it originated.

Non-speculative business loss carries forward for 8 assessment years from the year it was first computed. Once carried forward, though, it loses the flexibility it had in year one: a carried-forward business loss can only be set off against business or professional income in the later year, not against house property, capital gains, or anything else it might have offset originally.

Speculative business loss carries forward for a shorter window, 4 assessment years, and stays confined to speculative business income throughout, in the original year and every year after.

Capital loss, short-term and long-term alike, carries forward for 8 assessment years. The asymmetry from the original year persists: a carried-forward short-term capital loss can still be set off against both short-term and long-term gains in the later year, but a carried-forward long-term capital loss remains restricted to long-term gains only.

House property loss carries forward for 8 assessment years too, but the carried-forward amount narrows more than any of the others. Whatever you couldn't set off against other heads in the original year, or the entire loss if you had no other income to absorb it against, can only be set off against house property income in the later years. Not salary, not business income, nothing else, even though the original-year loss had a route to those heads up to the ₹2,00,000 cap.

Worth knowing as a separate matter entirely: unabsorbed depreciation carried forward by a business isn't the same thing as carried-forward business loss, and doesn't follow the 8-year limit at all. It carries forward indefinitely under a different provision. Don't assume a depreciation figure that's been sitting in your books for a decade has expired the way an old business loss would have.

The Filing Deadline That Forfeits Your Carry-Forward Rights

Here's the rule that catches more people than any restriction on what can be set off against what: to carry forward a loss, other than a loss from house property, you have to file your return by the original due date under Section 139(1). Miss that date and file a belated return instead, and the right to carry forward most losses is gone for that year, permanently. The loss isn't delayed. It's forfeited.

This condition comes from Section 80, which ties the right to carry forward business loss, speculative business loss, and capital loss to a return filed within the Section 139(1) timeline. File your ITR even a day after that due date, and a ₹4,00,000 capital loss you were entitled to carry forward for 8 years becomes a loss you can never use, even though you reported it accurately and even though you'll happily pay tax on a gain of the same kind next year.

House property loss is the one genuine exception among losses: it can still be carried forward even if you file a belated return. If most of your carry-forward relates to a rental property loss, a late filing costs you less than it would for a capital or business loss, though that's not a reason to treat the deadline casually, since a belated return carries its own separate consequences beyond loss carry-forward.

1. File by the Section 139(1) due date in every year you have a loss to report, even if your income for the year is otherwise below the threshold that would require you to file at all. A loss return only preserves your carry-forward rights if it's filed on time.
2. Report the loss in Schedule CFL and the relevant income schedules of the ITR form itself, not just in your own working papers. A loss that exists in your calculations but isn't disclosed in the return doesn't get carried forward either.
3. Track what you're carrying forward year to year, ideally in a simple running log, since the return relies on you correctly quoting the earlier year's assessed loss, not just remembering that a loss exists somewhere.
4. If you've missed a due date once, don't assume the next year is automatically fine. Confirm the carried-forward figure your intimation or assessment actually allows before you rely on it in a later year's return.
5. Where a loss is large enough to matter, get the return checked before filing rather than after. This is a deadline with no condonation route for an ordinary oversight.

Old Regime vs New Regime: Fewer Places for Losses to Go

The set-off rules above aren't identical across the two personal tax regimes. The new tax regime under Section 115BAC strips out most of the deductions and exemptions that these losses interact with, and the knock-on effect is that some set-offs have nowhere left to go. The clearest example is house property loss: under the old regime, you can set it off against salary or any other head up to the ₹2,00,000 cap described above. Under the new regime, that route is closed. Loss from house property cannot be set off against any other head of income, salary included, not even within the ₹2,00,000 cap that applies under the old regime.

In practice, this mostly affects a let-out property. The new regime already disallows the home loan interest deduction for a self-occupied house entirely, so there's rarely a route to a house property loss on a self-occupied home in the first place under the new regime. A loss is more likely to arise on a let-out property where interest exceeds rental income, and even then, that loss can only be set off against house property income, carried forward under the usual 8-year rule if it isn't fully used.

The general direction is worth remembering even where the fine print gets involved: the new regime is consistently more restrictive on loss set-off than the old one, not less, because it was built around removing deductions rather than preserving every route a loss could take. If you're choosing between regimes and you carry, or expect to carry, a house property loss, treat that as one of the numbers worth running before you decide rather than assuming it away. And if your situation involves switching regimes across years while carrying a loss forward, that's specific enough to be worth confirming against the current provisions, or with a professional, rather than relying on a general explainer like this one.