# Advance Tax on Capital Gains & Casual Income — Proviso to Section 234C

## The Problem

Advance tax is payable on total income, including capital gains and casual income (lotteries, crossword puzzles, horse race winnings, etc.). But these incomes cannot be reasonably estimated in advance — capital gains depend on when a transfer happens, and casual income is by nature unpredictable.

## The Solution — Special Rule

If such income (capital gain or casual income) arises after the due date of any advance tax instalment, then:

The entire tax payable on that income (after considering TDS) should be paid in the remaining instalments of advance tax that fall due after the income arose.
If no instalment is remaining, the entire tax must be paid by 31st March of that FY.

## Consequence

If the assessee follows this rule, no interest under section 234C is leviable on the shortfall in respect of such income for past instalments.

## Treatment of Casual Income Specifically

Casual income is subject to TDS @ 30% under sections 194B, 194BA, 194BB. So the tax (basic rate) is already deducted at source.

Advance tax liability arises only when:

Surcharge (if applicable),
Health & education cess @ 4%, AND
Tax on any other income

together equal or exceed ₹ 10,000.

Worked example

### Example 1

Example — Mr. X earns a long-term capital gain on 10th December (after the September instalment due date).

The entire tax on this LTCG must be paid in the remaining instalments — i.e., by 15th December and 15th March (or fully by 31st March if instalments missed).

No section 234C interest applies if so paid.

⚠️ Common exam mistakes

Computing 234C interest on shortfall in past instalments attributable to capital gain/casual income arising later in the year.
Forgetting that on casual income, TDS @ 30% already covers the basic tax — advance tax liability arises only for surcharge + cess + other income tax.
Treating advance tax liability as fully payable in the next quarter even when no instalment is due — must be paid by 31st March if all instalments have already lapsed.

Bare-Act text Proviso to Section 234C(1) · Income-tax Act, 1961 · click to expand

Proviso to Section 234C(1) - Nothing contained in this sub-section shall apply to any shortfall in the payment of the tax due on the returned income where such shortfall is on account of under-estimate or failure to estimate— (a) the amount of capital gains; or (b) income of the nature referred to in sub-clause (ix) of clause (24) of section 2 [casual income]; or (c) income under the head 'Profits and gains of business or profession' in cases where the income accrues or arises under the said head for the first time; or (d) income of the nature referred to in clause (24) of section 2 dividend, and the assessee has paid the whole of the amount of tax payable in respect of such income, as part of the remaining instalments of advance tax which are due or where no such instalments are due, by the 31st day of March of the financial year.

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Advance Tax on Capital Gains and Casual Income — Proviso to Section 234C

Worked example

⚠️ Common exam mistakes