Q.What is meant by describing 'Income from Other Sources' as a 'residuary head' of income? State the two conditions that must be satisfied before an item of income is charged under this Head.

This Head exists specifically to catch income that has nowhere else to go, but only under two conditions.

The two conditions: (i) the item must genuinely be income, and (ii) it must not be chargeable under any of the other four Heads.

Section 56 is called a 'residuary' charge because it is designed as a catch-all — rather than listing out every possible source of income exhaustively, the Act first defines four specific Heads (Salaries, House Property, Business/Profession, Capital Gains) and then, through Section 56, sweeps up EVERYTHING ELSE that is genuinely income but does not fit any of those four boxes. Two conditions must both be satisfied before an item lands here: first, it must actually BE income at all (a mere capital receipt, or an item specifically exempted under Section 10, is not income and cannot be charged under this or any Head); second, it must NOT be chargeable under any of the first four Heads — Income from Other Sources is deliberately the LAST Head considered, never the first.

Students sometimes treat 'Other Sources' as the FIRST Head to consider for an ambiguous income item, when it should always be the LAST — an item is classified under Other Sources only after confirming it genuinely does not fit any of the first four Heads.