Unabsorbed Depreciation

Section numbers are from the Income tax Act, 1961, the operative law for the current filing cycle. The Income tax Act, 2025 renumbers these provisions from Tax Year 2026-27. This article is for general information and does not constitute tax advice.

What it is, and why it behaves differently

Where depreciation for a year exceeds the profits available to absorb it, the excess is unabsorbed depreciation. Rather than being carried forward as a loss in its own right, it is added to the depreciation allowance of the following year and treated as if it were that year’s own depreciation. That single piece of drafting is what produces every difference below.

	Business loss	Unabsorbed depreciation
Carry forward period	8 years	Indefinite
Set off in later years against	Business income only	Any head except salary
Lost if return filed late?	Yes, permanently	No
Lost on 49%+ shareholding change in a closely held company?	Yes	No

Four differences, all of them favouring depreciation. For a capital-intensive business that has run losses, the split between the two figures is not a bookkeeping detail. It determines how much of the accumulated position actually survives a late filing, a funding round or a long stretch of unprofitable years.

The order of set-off, which decides what gets used up first

Where a business has all three available in a profitable year, they are absorbed in this sequence:

• Current year’s depreciation first
• then brought-forward business loss
• then brought-forward unabsorbed depreciation

That order is deliberate and it works in the taxpayer’s favour. Business loss, the item with an eight-year clock running against it, is consumed before unabsorbed depreciation, which has no clock at all. The perishable asset is spent first. A business that assumes depreciation is absorbed first will consistently understate how much of its expiring loss has actually been used.

The late-filing point, stated plainly

A business loss requires the loss year’s return to have been filed by the due date, or it is forfeited. Unabsorbed depreciation carries no such condition. Because it is folded into the next year’s depreciation allowance rather than carried forward as a loss, the timely-filing requirement that governs losses does not reach it.

So a business that missed a deadline in a loss year has not necessarily lost everything. What it has lost is the business loss component. The depreciation component survives, and quantifying the split is the first thing to do rather than assuming the whole year is written off. This is not a reason to file late, it is a reason to check carefully before concluding the position is worse than it is.

Shareholding changes, and what the concessional regime costs

The restriction that strips a closely held company of its business loss when beneficial ownership shifts by more than 49% does not extend to unabsorbed depreciation. In a funding round that costs a company its accumulated business loss, the depreciation component still comes through. That is often the larger figure in an asset-heavy business, and it is worth valuing separately during diligence rather than writing off the whole accumulated position.

One place the distinction narrows: opting into the concessional corporate regime under Section 115BAA or 115BAB forfeits unabsorbed depreciation attributable to additional depreciation claimed under the provision being given up. Ordinary unabsorbed depreciation, unrelated to that claim, is not affected. Getting that split right before an irrevocable election is exactly the kind of work worth doing in advance, and it is covered from the regime side in Company Tax Rates.