Sold shares or property mid-year: do I owe advance tax on the gain?

You sold some shares in October. Or a flat in August. The money has landed, and now someone tells you that "advance tax" was due on 15 September, which has already passed. Do you owe interest for being late on a gain you did not even have in June?

Short answer: for the tax year 2026-27 the Income-tax Act, 2025 has a specific relief for this. Deferment interest is not charged on a shortfall that comes from underestimating, or failing to estimate, a capital gain, provided you pay the full tax on that gain in a remaining instalment or by 31 March (s.425(4), Income-tax Act, 2025). This article walks through the rule, the instalment dates, and what to do today.

A note on the Acts. For a sale made in the financial year starting 1 April 2026 (the tax year 2026-27), the Income-tax Act, 2025 applies. The 2025 Act came into force on 1 April 2026 (s.1(3)), and the repealed 1961 Act continues to apply to liabilities that arose under it (s.536(2), Income-tax Act, 2025). So for a sale made in the financial year ended 31 March 2026 (assessment year 2026-27), the 1961 Act governs, and s.425(4) of the 2025 Act is not the rule for that year. Everything below is the 2025 Act and applies to the tax year 2026-27. The matching 1961 section is named where the mapping table gives one.

Does advance tax apply to a capital gain at all?

Yes. Advance tax is payable on your "current income" for the year, which is the total income chargeable to tax for that tax year (s.403(1) and (2), Income-tax Act, 2025). A capital gain is part of total income. So it is part of what you must pay in advance.

Advance tax is payable only where the amount payable, as computed under this Part, is ₹10,000 or more (s.404, Income-tax Act, 2025). That amount is the income-tax on your estimated income at the rates in force, less tax deductible or collectible at source on income taken into account and actually received or credited after deduction or collection (s.405(1), Income-tax Act, 2025). So if the buyer of your property deducted tax at source, or tax was already collected on a transaction, that credit reduces what you owe in advance.

One group is outside the system. A resident individual aged sixty or more at any time in the tax year, with no business or professional income, does not have to pay advance tax (s.403(3), Income-tax Act, 2025). If that is you, the gain is simply taxed when you file your return, and the instalment discussion below does not apply to you.

The four instalments

Most taxpayers pay in four instalments (s.408(1), Income-tax Act, 2025):

• on or before 15 June: not less than 15% of the advance tax;
• on or before 15 September: not less than 45%, less what you have already paid;
• on or before 15 December: not less than 75%, less what you have already paid;
• on or before 15 March: the whole amount, less what you have already paid.

A taxpayer who declares profits under the presumptive scheme in s.58(2) (Table: Sl. No. 1 or 3) pays the whole advance tax in one go, on or before 15 March (s.408(2), Income-tax Act, 2025).

Anything paid up to 31 March counts as advance tax for that year (s.408(3), Income-tax Act, 2025). That matters for the plan below.

You can also correct your estimate as the year goes on. A person who has paid an instalment may increase or reduce the amount in the remaining instalments to match the new estimate (s.406(2), Income-tax Act, 2025). A big sale is exactly that kind of new fact.

Why a mid-year sale does not automatically mean interest

Interest for deferment of advance tax is charged under s.425, Income-tax Act, 2025. The mapping table pairs it with s.234C of the 1961 Act. The default rule: if the advance tax you have paid by an instalment date falls short of the required share of the tax due on your returned income, interest runs on the shortfall (s.425(1), Income-tax Act, 2025):

• 3% on the shortfall for the 15 June, 15 September and 15 December instalments;
• 1% on the shortfall for the 15 March instalment.

There is a safe harbour: no interest under s.425(1) if you paid 12% or more of the tax due on your returned income by 15 June and 36% or more by 15 September (s.425(2), Income-tax Act, 2025). "Tax due on the returned income" is the tax on the total income declared in your return, less tax deducted or collected at source (s.425(5), Income-tax Act, 2025).

On its face, s.425(1) would catch someone who sold a property in October and paid nothing on 15 June or 15 September. But s.425(4) removes interest in this case. It says no interest is payable under s.425(1) or (3) on a shortfall if two things are true:

• The shortfall is on account of underestimating, or failing to estimate, one of a listed set of incomes. The list is: capital gains; income as per s.2(49)(n) (winnings from lotteries, crossword puzzles, races including horse races, card games and other games or gambling or betting); business or professional income arising for the first time; and dividend income (s.425(4)(a), Income-tax Act, 2025).
• You have paid in full the tax on that income, as if it were part of total income, in any of the remaining instalments of advance tax, if any, or by 31 March of the tax year (s.425(4)(b), Income-tax Act, 2025).

So the relief has a condition attached. It does not say "the gain is free of advance tax". It says you will not be charged deferment interest for the earlier instalments if you pay the tax on the gain in time.

What about the 1961 Act?

For a sale in the year ended 31 March 2026, the 1961 Act applies and the matching provision is s.234C. The text of s.234C as it stands after the Finance Act 2026 was not available for this article, so its words are not quoted and nothing here should be read as saying how it treats capital gains. Do not carry the s.425(4) list of incomes or its conditions back to that year. Have the current 1961 text read before you file for assessment year 2026-27.

Which instalment should carry the tax on the gain?

Use the clock. The instalment table in s.408(1) gives the dates, and s.425(4)(b) requires the tax on the gain to be fully paid in a remaining instalment or by 31 March. The statute does not itself say which instalments are "remaining" for a gain that arises on a given date. The table below is our practical reading of it, not statutory text, for a sale in the year starting 1 April 2026:

Section 425(4)(b) speaks of "any of the remaining instalments of advance tax, if any, or by the 31st day of March". So the outer limit is 31 March of the tax year, whichever way the word "remaining" is read. The safest practical approach is to pay in the next instalment that falls after the sale. Paying early costs nothing extra; paying late can bring the other interest covered below.

A worked illustration

Every figure in this example is invented for illustration. None is a real rate, a real computation or advice on a real sale.

Meera, a resident salaried individual under sixty, expects tax of ₹40,000 after TDS for the year (illustrative) and has paid 15% by 15 June and 45% in total by 15 September (₹6,000 and ₹18,000, illustrative). On 10 October she sells listed shares. Assume (illustrative) the tax on the resulting gain comes to ₹1,20,000.

• On 15 December, the instalment table asks for not less than 75% of her advance tax. Her advance tax is now her revised estimate: ₹40,000 plus ₹1,20,000, or ₹1,60,000, so 75% is ₹1,20,000, less the ₹18,000 already paid. She revises her estimate and pays the balance as her plan requires.
• If she pays the full ₹1,20,000 on the gain by 15 December, or in the 15 March instalment, or by 31 March, s.425(4) removes deferment interest on the earlier shortfall caused by the gain.
• The instalments for the rest of her income are judged separately. If she under-paid on her salary-side tax by 15 June or 15 September, s.425(1) still applies to that part.

The relief is therefore not blanket. It covers the shortfall caused by the gain, not every shortfall on the return.

The other interest: s.424

There is a second advance tax interest, which people mix up with the first. Under s.424, Income-tax Act, 2025 (the 1961 equivalent is s.234B), an assessee liable to advance tax who has not paid it, or whose advance tax is less than 90% of the "assessed tax", pays simple interest at 1% for every month or part of a month. The period starts on 1 April after the tax year (s.424(1), Income-tax Act, 2025). The "assessed tax" is the tax on the determined total income, reduced by TDS and TCS on income taken into account and by certain foreign tax reliefs (s.424(2), Income-tax Act, 2025).

Sub-sections (1) to (5) of s.424 contain no capital-gain exception. Payment by 31 March is still treated as advance tax of the year (s.408(3)), so paying the tax on your gain by then helps with the 90% test as well. Where the gain is large and you pay only when you file your return, s.424 interest can apply. The 1961 text of s.234B was not available for this article; check it for assessment year 2026-27.

What to do now

If you sold shares or property after one of the instalment dates:

• Estimate the tax on the gain. Work out the gain, the rate that applies to it and any TDS already credited on the sale (s.405(1), Income-tax Act, 2025).
• Revise your total estimate. Fold the gain into your current income estimate and recompute your advance tax (s.406(2), Income-tax Act, 2025).
• Pay in the next instalment. Aim for the first instalment date after the sale (s.408(1), Income-tax Act, 2025). The outer limit is 31 March (s.425(4)(b) and s.408(3), Income-tax Act, 2025).
• Pay and keep the challan. Pay as advance tax for the correct tax year and keep the proof of payment with your sale papers.
• Record the date of sale. The relief covers a shortfall from underestimating or failing to estimate the gain, so the sale date, contract papers and your estimates at each instalment date are your proof.

Consequence of not paying: interest under s.425(1) at 3% on the shortfall at each of the first three dates and 1% for March, if neither the s.425(2) safe harbour nor the conditions of s.425(4) are met, plus interest under s.424 at 1% a month or part of a month if advance tax paid is below 90% of assessed tax.

What not to do

• Do not wait for the return to pay. The relief in s.425(4)(b) needs payment by 31 March of the tax year, not at filing.
• Do not assume every shortfall on the return is excused. Only the part caused by the listed income is covered.
• Do not rely on someone telling you "gains are exempt from advance tax". The law applies advance tax to current income, which includes the gain.
• Do not apply this article to the year ended 31 March 2026. For a sale before 1 April 2026, the 1961 Act governs; read s.234C of that Act in its current text.

Have a CA review your facts before you act or file.

FAQs

I sold property in November. Must I pay by 15 December?
Paying by 15 December is the safest course, since that is the next instalment date (s.408(1), Income-tax Act, 2025). You may also pay in the 15 March instalment or by 31 March and still be within s.425(4)(b), as long as the full tax on the gain is paid.

I am a senior citizen. Do I need to do anything?
A resident individual aged sixty or more at any time in the tax year, with no business or professional income, is outside advance tax (s.403(3), Income-tax Act, 2025). The gain is taxed at filing instead. If you also run a business, this exemption does not apply.

What if I knew about the sale in June and still paid nothing?
The relief applies where the shortfall is on account of underestimating, or failing to estimate, the gain (s.425(4)(a), Income-tax Act, 2025). The words do not turn on whether you knew of the sale, but a sale you had already agreed and chose to leave out of your estimate is a fact to put to your CA before you rely on the relief. Keep your documents.

Can I pay the advance tax on the gain after 31 March?
Advance tax must be paid by 31 March to count for that tax year (s.408(3), Income-tax Act, 2025). A later payment is not advance tax for that year, and s.424 interest runs until the tax is paid (s.424(1) and (4), Income-tax Act, 2025).

Is the 1961 Act rule the same?
For the year ended 31 March 2026 the 1961 Act applies, and s.234C of that Act is the matching section. Its current text was not available for this article, so confirm its words before relying on any relief for assessment year 2026-27.

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