Section 80AC Income Tax Act: Due-Date Filing for Chapter VI-A Deductions

Section 80AC of the Income-tax Act, 1961 makes timely filing of the income-tax return a condition for claiming specified deductions. For assessment years beginning on or after 1 April 2018, its scope covers deductions under the heading "C. - Deductions in respect of certain incomes" in Chapter VI-A. The return must ordinarily be furnished by the due date under Section 139(1).

Meaning and purpose of Section 80AC

Section 80AC is a statutory filing-condition provision. It does not independently grant a deduction or determine its amount. Rather, it restricts the allowance of specified deductions when the assessee does not file the return of income by the relevant due date. The substantive deduction provision, other Chapter VI-A conditions and the tax regime must also be satisfied.

Which deductions are covered?

Examples of income-linked provisions under that heading include Sections 80-IA, 80-IAC, 80-IB, 80JJAA and 80P, where applicable. A section's continued availability, eligibility conditions and applicable tax regime must be checked for the particular year. Section 80C (certain investments and payments) is in a different Chapter VI-A heading and is not brought within Section 80AC merely because it begins with "80".

Definitions and connected statutory provisions

Section 139(1) - return filing due date

Requires persons meeting the applicable criteria to furnish an income-tax return by the specified due date. The applicable deadline depends on the assessee category, audit and other statutory factors and any valid extension.

Chapter VI-A

Chapter containing deductions from gross total income, subject to its general and section-specific restrictions.

Heading C - deductions in respect of certain incomes

A statutory grouping within Chapter VI-A covering qualifying income-based deductions. This is the scope reference used in Section 80AC for assessment years beginning on or after 1 April 2018.

Assessment year

Under the 1961 Act, the twelve-month period beginning 1 April following the relevant previous year, subject to the applicable definitions.

Belated return - Section 139(4)

A return furnished after the original due date but within the statutory belated-return window. Filing such a return does not, by itself, satisfy Section 80AC's timely-filing condition.

Section 80A(5)

Separately requires eligible income-linked deductions to be claimed in the return; timely filing under Section 80AC is an additional condition.

Consequences of late filing

If a return is filed after the applicable due date, a deduction within Section 80AC's scope is ordinarily disallowed even if the taxpayer otherwise qualifies for the deduction. This does not mean that every deduction in Chapter VI-A is denied by Section 80AC. The rule is confined to the deductions described in its text. Where a lawful due-date extension, statutory relaxation or valid condonation applies, its precise scope and conditions must be examined rather than assuming relief.

Practical example

Suppose a qualifying business seeks an income-linked deduction under Section 80-IA for an assessment year governed by the 1961 Act. If the applicable Section 139(1) due date is 31 October and the business files on 15 November without any applicable extension or relief, the Section 80AC filing condition is not met. The example uses an illustrative due date only; actual deadlines must be verified for the relevant assessment year.

Compliance checklist

• Identify the assessment year and legislation governing it.
• Check that the proposed deduction falls under the relevant Chapter VI-A heading and remains available.
• Determine the correct Section 139(1) due date and check official extensions.
• Claim the deduction in the return and meet all other documentary, audit and reporting conditions.
• Retain acknowledgement, computation, relevant audit reports and supporting records.

Frequently asked questions

What is the rule under Section 80AC?

For assessment years commencing on or after 1 April 2018, the specified income-linked Chapter VI-A deductions are subject to filing the income-tax return on or before the due date under Section 139(1).

Does Section 80AC apply to Section 80C investments?

No. Section 80C is not under the Chapter VI-A heading C - Deductions in respect of certain incomes. Its own eligibility rules and the applicable tax regime must be checked.

Is a belated return sufficient for a deduction covered by Section 80AC?

Ordinarily no. A return filed after the applicable Section 139(1) due date does not meet the timing condition, unless a legally effective extension, condonation or other relief applies.

Does Section 80AC itself prescribe the return due date?

No. It cross-refers to the due date specified in Section 139(1), which depends on the assessee and applicable law and may be extended by a competent authority.

Does the 1961 Act apply to tax years beginning after 1 April 2026?

The Income-tax Act, 2025 came into force on 1 April 2026. For a later tax year, the relevant provision in the 2025 Act and applicable transitional rules should be consulted rather than applying the old section number automatically.

Official legislation and filing resources

• India Code - official central legislation, including the Income-tax Acts.
• Income Tax Department - statutory resources, circulars and notifications.
• Income Tax e-Filing Portal - returns, filing services and current compliance notices.

Original statutory extract and legislative note

The text below preserves the substantive extract and amendment note supplied in the original webpage. Consult the official legislation and the law applicable to the relevant assessment year before relying on it.