Capital Gains Advance Tax: Can You Wait Till March 31 Under New Act Without Interest?

The Income-tax Act, 2025 has preserved India’s advance-tax framework while creating a new question over when taxpayers can pay tax on capital gains without interest. Under Section 425(4), the answer may turn not only on whether payment reaches the government by March 31, but also on why earlier instalments fell short.

The issue can be illustrated by a ₹1 crore capital gain arising on September 1, 2026. The taxpayer could not have included that transaction in the June calculation because the sale had not yet happened. By September 15, however, the gain had arisen and its tax consequences could ordinarily be known and quantified.

The taxpayer then pays nothing toward the additional liability in September or December and pays the full attributable amount on March 31, 2027. That person may point to the statute’s reference to payment by March 31. The Revenue may instead argue that a known gain no longer presents an estimation problem.

As of September 2026, the wording supports an argument for flexibility, but it does not clearly establish an unrestricted right to defer tax on every mid-year capital gain until the end of the tax year 2026-27.

The instalment schedule still reaches 100% by March

Section 408 sets the cumulative advance-tax timetable for taxpayers covered by the ordinary regime:

The schedule requires taxpayers to estimate their liability before the financial year closes. A payment made on or before March 31 is treated as advance tax paid during that financial year. The interest provision addresses shortfalls caused by delayed or insufficient instalments.

That system works more easily when income arrives predictably. Capital gains can arise from a transaction that nobody expected when the earlier instalment became due.

Capital gains receive special treatment because sales can happen late

A person may hold property, shares or another capital asset without any plan to sell it by June 15. A transaction may occur in September, December or the final days of March. The related gain could not have been calculated before the sale created it.

The Income-tax Act, 1961 addressed that difficulty through Section 234C. CBDT Circular No. 545, dated September 24, 1989, explained the hardship taxpayers faced when capital gains arose after advance-tax instalment dates.

The earlier approach granted relief where the shortfall followed from underestimating, or failing to estimate, specified income such as capital gains. The relief carried a payment condition.

The taxpayer had to pay the full tax attributable to the gain through the advance-tax instalments that remained. If no such instalment was left, the taxpayer could pay by March 31.

That structure followed the timing of the transaction. A gain arising in October could be included in the December and March instalments. A gain arising after March 15 had no later regular instalment, which explains the separate year-end payment facility.

The new text creates two competing readings

The new provision carries forward the central relief for capital gains but uses different wording for the payment deadline. It first addresses the cause of the shortfall. The shortfall must result from underestimation of, or failure to estimate, specified income, including capital gains.

It then describes when the attributable tax must be paid:

“in any of the remaining instalments of advance tax, if any, or by the 31st day of March of the tax year.”

The words “or by” may give taxpayers a textual basis for arguing that the law provides alternative payment routes. On that reading, payment in a remaining instalment is one route, while payment by March 31 is another.

Taxpayer’s possible interpretation

A taxpayer could argue that Parliament deliberately changed the former language. The earlier provision linked March 31 to the absence of any remaining instalment. The new formulation says payment may occur in a remaining instalment, “if any, or by” March 31.

That change, the taxpayer could contend, should receive independent meaning. If Parliament intended the March 31 option to apply only after the final regular instalment, it could have retained the earlier structure.

Under that view, a person who pays the full tax attributable to a September gain by March 31 has satisfied the express payment condition. The taxpayer would still need to address the provision’s separate reference to underestimation or failure to estimate.

Revenue’s possible interpretation

The Revenue could focus on that threshold requirement. It could argue that the year-end wording does not create a standalone exemption from interest whenever a taxpayer pays by March 31.

The taxpayer must first show that underestimation or failure to estimate caused the shortfall. A gain that had not yet arisen on June 15 fits that description more naturally. A gain that arose on September 1 and remained unpaid through September 15 and December 15 presents a harder case.

Once the taxpayer knows the gain and can ordinarily quantify the resulting liability, deliberate non-payment may be characterised as a payment decision rather than an estimation failure. The March 31 wording may support a textual argument, but it does not answer that threshold question.

A gain arising after March 15 presents a different case

Consider a capital gain arising on March 18, 2027. The final regular advance-tax instalment was due on March 15, three days earlier.

The gain did not exist when that instalment became payable. No later regular instalment remained through which the taxpayer could pay the related advance tax. Payment by March 31 therefore fits more directly with the historical reason for the relief.

The Rajasthan High Court addressed the underlying timing principle in CIT v. Smt. Premlata Jalani, [2003] 264 ITR 744 (Raj.). The capital gain in that case arose after the last advance-tax instalment date.

The court accepted that advance tax attributable to a capital gain could not be required before the gain accrued or arose. The date of the transaction consequently mattered when considering interest under Section 234C.

The decision does not resolve the changed wording for every future fact pattern. It does reinforce the distinction between income that did not yet exist and income that had already become known before later instalments.

The former Section 234C remains relevant as a comparison, although it does not govern future tax years. It shows continuity in the estimation condition and a difference in the language governing payment by March 31.

Known gains should not be treated as an automatic March 31 deferral

Taxpayers should not assume that the new wording permits them to ignore every instalment after a capital gain becomes known. The stronger case for year-end payment is the one in which the transaction occurred too late for any remaining regular instalment.

The more difficult case involves a substantial gain arising in the middle of the year. After the transaction, the taxpayer may know the amount and be able to calculate the associated tax. Choosing not to pay in September or December could make it harder to show that the shortfall resulted from underestimation or failure to estimate.

The older rule, the changed wording and the underlying purpose of the relief must be read together. Reading only the words “or by March 31” could overlook the condition governing the cause of the shortfall. Treating the new language as identical to Section 234C could fail to give effect to the legislative change.

CBDT guidance, appellate authorities and courts may eventually determine how those provisions operate together. Until that interpretation develops, taxpayers with substantial capital gains should consider revising their advance-tax computation after the gain arises.

Paying the attributable amount on March 31 may not automatically remove interest under the new regime. The potential exposure becomes more consequential as the size of the capital gain increases.

The first body of administrative and judicial interpretation will likely focus on the line between an income event that could not have been predicted and deliberate non-payment after the event became known. That line will determine how far the changed March 31 wording extends.

This article is for informational purposes only and does not constitute tax advice. Consult a qualified tax professional about your specific situation.