Imagine you sold some shares and made a loss — can that loss reduce your tax on other profits? That's exactly what Section 74 answers. It governs how capital losses — both short-term and long-term — can be set off and carried forward when they can't be fully absorbed in the same year.
Here's the core rule, and this is where most students slip up: Short-Term Capital Loss (STCL) is the flexible one — it can be set off against any capital gain, whether Short-Term Capital Gain (STCG) or Long-Term Capital Gain (LTCG). But Long-Term Capital Loss (LTCL) is restricted — it can only be set off against LTCG. You cannot use an LTCL to reduce your STCG. Think of it this way: long-term losses stay in the long-term lane. If the loss cannot be fully set off in the current year (because the gains aren't enough), the unabsorbed loss is carried forward for up to 8 Assessment Years immediately following the year of loss. The same restriction applies during carry forward too — LTCL carried forward can only be set off against future LTCG, never against STCG.
One critical condition that exam questions love to test: you must file your Income Tax Return on or before the due date under Section 139(1) to be allowed to carry forward a capital loss. Miss the deadline and you lose the carry-forward benefit permanently — though any unabsorbed depreciation is an exception to this rule (but that's not a capital loss, so don't confuse them). Also remember: capital losses cannot be set off against income under any other head like salary, house property, or business income — they are strictly intra-head or within the capital gains head. This is asked frequently as a 4-mark or 6-mark question in Paper 3, often as a computation problem where they give you mixed STCG, LTCG, STCL, and LTCL and ask you to compute taxable capital gains after set-off and the loss to carry forward.