Carrying forward capital losses — the 8-year window

Capital losses do not vanish if you cannot use them in the year they were incurred. The Income Tax Act allows you to carry them forward for up to 8 assessment years — but with two important constraints: the loss can only be set off against the right kind of future gain, and the carry-forward right requires you to file the loss-year return on or before the due date.

What can be carried forward

Both short-term capital losses (STCL) and long-term capital losses (LTCL) are eligible for carry-forward. They must first be exhausted against same-head same-year gains before any surplus rolls forward:

• STCL is first set off against current-year STCG, then against current-year LTCG. Any surplus carries forward as STCL.
• LTCL is set off against current-year LTCG only. Any surplus carries forward as LTCL.

The set-off rules in carry-forward years

When the carried-forward losses are used in future years, the set-off rules become asymmetric:

• Carried-forward STCL can be set off against future STCG or LTCG of any nature.
• Carried-forward LTCL can only be set off against future LTCG.

This means short-term losses are more flexible — worth knowing when you have a choice about which losses to realise.

The 8-year window

Each annual carry-forward extends the loss for that many assessment years from the year of the loss. So a loss incurred in FY 2025-26 (AY 2026-27) can be set off through AY 2034-35 (FY 2033-34) — 8 AYs after the loss year.

After the 8-year window, any unused loss is forfeit. The window is per loss, so a loss-incurring streak across multiple years creates a portfolio of overlapping carry-forwards.

The filing-by-due-date condition

This is the lever most investors miss. Per Section 80, carry-forward of capital losses is allowed only if the loss-year return was filed by the due date under Section 139(1). If you filed late — even by one day — the carry-forward right is gone. The loss can still be set off against same-year gains, but the forward window is closed.

For mutual fund investors who routinely have loss years (small-cap allocations going through drawdowns, debt funds in rising-rate cycles), making the 31 July filing deadline is a high-value discipline.

Where carry-forwards are tracked

Schedule CFL (Carried Forward Losses) in ITR-2 captures the loss-year-wise opening balance, set-off against the current year's gains, and the closing balance to carry to the next year. The schedule rolls forward each year — your ITR-2 in any future year shows the full 8-year ledger of carry-forwards.

If you are using a tax-filing utility (third-party software) and switch utilities between years, manually verify that the prior carry-forward balances are correctly imported. This is a common transition-year error.

Worked example over multiple years

FY 2024-25: LTCL of ₹3,00,000 (debt fund redemption with capital loss). Filed return on time. Carry forward ₹3,00,000 LTCL.

FY 2025-26: LTCG of ₹2,00,000 (equity fund redemption). Set off ₹2,00,000 of carried LTCL against this. After ₹1.25 lakh exemption, taxable LTCG is ₹0. Remaining LTCL to carry: ₹1,00,000.

FY 2026-27: LTCG of ₹1,50,000. Set off ₹1,00,000 remaining LTCL. ₹50,000 LTCG remaining, below the ₹1.25 lakh exemption so no tax. Carry forward is now zero.

Loss-harvesting and carry-forward planning

Investors who deliberately realise losses to offset gains can plan around the 8-year window. If you have a ₹2 lakh carried LTCL from FY 2020-21 (AY 2021-22), it must be used by AY 2029-30. As that deadline approaches, you can deliberately realise sufficient LTCG to consume the loss before it expires. The trade-off: you take on tax exposure earlier than you would have, but use the loss that would otherwise have lapsed.

What cannot be carried forward

• Losses from speculation: speculation business losses are deductible only against speculation business income; can be carried forward but only 4 years.
• Notional losses: unrealised market drawdowns are not deductible. You must redeem the units (or otherwise have a taxable event) to recognise the loss.
• Losses on residential property capital gains: subject to different specific rules under Section 54-series exemptions.

For NRIs

NRIs can carry forward capital losses the same way as residents, subject to the 8-year window and the timely-filing condition. The losses can be set off against future Indian-source gains. Foreign-sourced losses are not part of the Indian carry-forward system.

Record-keeping

Maintain a multi-year capital loss tracker. Each year, note:

• Year of original loss.
• Original loss amount.
• Year-by-year set-off applied.
• Remaining balance.
• Year by which it expires.

This makes year-end planning conscious — which losses are expiring, which to use first (FIFO of carried losses is standard).