Section 100 of the Income-tax Act, 2025 — Liability of a Person for Tax on Income Clubbed in Another Person's Income

In plain language

What Section 100 actually says

Clubbing provisions (Sections 96 to 99 of the Income-tax Act, 2025) can force one person's income to be added to and taxed in the hands of another person — for example, income from an asset gifted to your spouse gets taxed in your total income. Section 100 is the collection safety-net for the tax department. It says that even though the income has been taxed in the assessee's return, the department can still recover the attributable tax from the real owner of the asset or the member of the firm whose income was clubbed.

Section 100 is the direct successor to Section 65 of the Income-tax Act, 1961. The wording is almost identical; only the section number and cross-references have changed under the new Act (effective 1 April 2026).

Who it applies to

• The person in whose name the asset stands — e.g., the spouse, son's wife, or minor child who legally holds the gifted/transferred asset, but whose income was clubbed into the transferor's hands.
• A member of a firm whose share income has been included in another person's total income under the clubbing rules.
• Joint holders of such an asset — they become jointly and severally liable, meaning the department can recover the entire attributable tax from any one of them.

Key conditions and how recovery works

• Income must first be clubbed. Section 100 only bites where income of a person other than the assessee, arising from an asset or from firm membership, is already included in the assessee's total income under this Chapter (clubbing) or under Section 25(a).
• Liability is only for the proportionate tax — that portion of the tax levied on the assessee which is attributable to the clubbed income, not the assessee's whole tax bill.
• A notice of demand is mandatory. The person becomes liable only upon service of a notice of demand by the Assessing Officer. No notice, no liability on that person.
• Chapter XIX-D (Collection and Recovery of Tax) applies — so the same recovery machinery (attachment, recovery certificate, etc.) used against a normal defaulter can be used here.

How it interacts with related sections

• Section 99 (clubbing of income of spouse, son's wife, minor child, HUF) — the equivalent of old Section 64 — is the most common trigger.
• Sections 96–98 deal with transfer of income without transfer of asset, and revocable/irrevocable transfers (old Sections 60–63). Income clubbed under these can also invoke Section 100.
• Section 100 does not create a new tax. It only re-routes the recovery of tax that already exists because of clubbing. The primary assessee still shows the income and pays; Section 100 is a fallback so that the person actually holding the asset cannot dodge the department if the assessee doesn't pay.

Practical implications for taxpayers

• If you gift an income-producing asset to your spouse or minor child and the income is clubbed back to you, remember the asset-holder can be pursued for the tax if you default — this is not merely a paper adjustment.
• For families holding property jointly, understand that joint and several liability means one co-owner can be asked to pay the full attributable tax and then recover from the others privately.
• Keep clean documentation of which income was clubbed and the proportionate tax, so that if a demand notice comes, you can verify the attributable amount rather than the whole tax.
• This is an anti-avoidance and recovery provision — it plugs the gap where the assessee's income was inflated by clubbing but the assessee has no means to pay, while the asset (and its real value) sits with someone else.