Interest on Late ITR · FY 2025-26

Section 234A —
Interest on Late ITR Filing

Q: What is Section 234A of the Income Tax Act?

Section 234A levies simple interest at 1% per month (or part of a month) when you file your Income Tax Return after the due date and tax is still payable. The interest runs from the day after the filing due date to the date you actually file, and is computed on your net tax payable after TDS, TCS, advance tax and self-assessment tax. In the Income-tax Act, 2025, this provision is re-enacted as Section 424 for AY 2026-27 onward.

Q: What is the interest rate under Section 234A?

1% per month, charged as simple interest (not compounding). Any part of a month is treated as a full month, so filing even one day into a new month adds another 1% for that month.

Q: On what amount is 234A interest calculated?

On the net tax payable — your total tax liability (including surcharge and cess) minus TDS, TCS, advance tax and any self-assessment tax paid up to the due date. It is not calculated on your gross tax or total income.

Q: From which date does Section 234A interest start?

From the day immediately after the due date for filing your return — usually 1 August for non-audit individuals (due date 31 July) and 1 November for audit cases (due date 31 October) — and it runs until the date you actually file the return.

Q: How do I calculate 234A interest with an example?

Interest = net tax payable × 1% × number of months of delay. If net tax payable is ₹1,00,000 and you file 3 months late, interest = ₹1,00,000 × 1% × 3 = ₹3,000. If you filed just one day late, it would still be one full month = ₹1,000.

Q: Is 234A simple or compound interest?

Simple interest. It is a flat 1% per month on the net tax payable and does not compound over the delay period.

Q: How is 234A calculated if the CBDT extends the due date?

Section 234A generally runs from the original statutory due date, not from any extended deadline, unless the CBDT extension order specifically waives 234A. Where large self-assessment tax was outstanding, courts and CBDT circulars have in the past levied 234A from the original date despite an extension, so verify the wording of each year's extension notification.

Q: Is 234A interest charged if I am due a refund?

No. If your tax is fully covered by TDS, TCS and advance tax so that net tax payable is nil — or you are entitled to a refund — Section 234A does not apply, even if you file the return after the due date. There is no tax base on which to charge the interest.

Q: Does Section 234A apply to a revised return?

No. Section 234A applies only to a belated original return filed after the due date. Revising a return that was originally filed on time does not attract fresh 234A interest, though other consequences may follow if additional tax is paid late.

Q: Does 234A apply if my income is below the basic exemption limit?

No. If there is no tax liability — for example income below the basic exemption limit with no special-rate income — there is no net tax payable, so Section 234A does not apply even on a late return.

How Section 234A charges 1% simple interest per month on unpaid tax when you file your Income Tax Return after the due date, with a worked example, exemptions and the difference from 234B & 234C.

Updated for AY 2026-27 Tax Expert Reviewed Interest & Late-Fee Guide

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1%Per month (simple)

Net taxInterest base

31 JulUsual ITR due date

NilIf no tax payable

Quick Answer

Section 234A charges simple interest at 1% per month (or part of a month) when you file your Income Tax Return after the due date and tax remains payable. Interest is computed on the net tax payable — total tax liability minus TDS, TCS, advance tax and self-assessment tax. If your net tax payable is nil (fully covered by TDS/advance tax) or you are due a refund, no 234A interest applies even if the return is late.

Rate 1% p.m.

Base Net tax payable

From Due date

If nil payable No 234A

Mechanics

How Section 234A Interest is Calculated

Section 234A of the Income-tax Act, 1961 (re-enacted as Section 424 of the Income-tax Act, 2025 for AY 2026-27 onward) levies interest for the period you delay filing your return.

Rate: 1% for every month or part of a month of delay — even one day into a new month counts as a full month.
Interest type: simple interest, not compounding.
Base (net tax payable): total tax liability − TDS − TCS − advance tax − self-assessment tax paid up to the due date, plus applicable surcharge and cess.
Period: from the day after the due date of filing to the date you actually file the return.

The base is tax PAYABLE, not total tax

234A bites only on the balance still owed after TDS and advance tax. Salaried taxpayers whose tax is fully deducted at source usually have nil 234A even when they file a belated return — but they can still be hit by the Section 234F late-filing fee.

Compare 234A with the sibling interest charges under Section 234B & 234C (advance-tax defaults) and the flat late-filing fee under Section 234F.

Not sure how much interest you owe on a late return? Let an expert compute and file it.

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Worked example

Section 234A Calculation — Step by Step

A taxpayer with a due date of 31 July 2026 files the return on 31 October 2026 — a delay of 3 months.

Net tax payable (234A base)

Total tax liability₹1,40,000

Less: TDS deducted₹30,000

Less: Advance tax paid₹10,000

Net tax payable₹1,00,000

234A interest for 3 months

Base amount₹1,00,000

Rate1% per month

Months of delay (part = full)3

234A interest₹3,000

Even one extra day = one more month

If the same return had been filed on 1 August 2026 (just one day late), it would still attract a full month of interest — ₹1,000 in this example. There is no per-day proportioning under Section 234A.

Sections compared

234A vs 234B vs 234C — Key Differences

Section	When it applies	Rate	Calculation base	Period
234A	ITR filed after due date with tax still payable	1% p.m.	Net tax payable after TDS/TCS & advance tax	Due date → actual filing date
234B	Advance tax paid < 90% of assessed tax	1% p.m.	Shortfall in advance tax	1 April of AY → date of self-assessment tax
234C	Advance-tax instalment less than the required %	1% p.m.	Shortfall in each instalment	3 months per missed instalment (1 month for the last)

All three are simple interest at 1% per month. You can be charged 234A, 234B and 234C together on the same return.

Paying advance tax correctly avoids 234B/234C, and filing on time avoids 234A. Estimate your liability with the income tax calculator and check the current income tax slabs.

Exemptions

When Section 234A Does NOT Apply

Situation	234A?	Reason
All tax covered by TDS/TCS — refund or nil tax due	No	Net tax payable = ₹0, so there is no base
Advance tax covers the entire liability	No	Nothing remains payable at the due date
Return filed on or before the due date	No	No delay — interest period is zero
Revised return (original filed on time)	No	234A applies only to a belated original return
Income below the basic exemption limit	No	No tax liability, so no interest
Belated return with tax still payable	Yes	1% per month on the unpaid tax until filing

234A waiver does not cover 234F

Even where net tax payable is nil and 234A does not apply, filing after the due date still attracts the Section 234F fee — ₹5,000 (₹1,000 if total income is up to ₹5 lakh). File on time to avoid both.

Government sourcesAct text: incometax.gov.in — Section 234A, Income-tax Act 1961 · Income-tax Act, 2025: Section 424 (successor to 234A), effective AY 2026-27 · ITR due dates & belated-return deadline: 139(1) / 139(4) · Related fee: Section 234F (late-filing fee)

Section 234A — Frequently Asked Questions

Basics

What is Section 234A of the Income Tax Act?

Section 234A levies simple interest at 1% per month (or part of a month) when you file your Income Tax Return after the due date and tax is still payable. The interest runs from the day after the filing due date to the date you actually file, and is computed on your net tax payable after TDS, TCS, advance tax and self-assessment tax. In the Income-tax Act, 2025, this provision is re-enacted as Section 424 for AY 2026-27 onward.

What is the interest rate under Section 234A?

1% per month, charged as simple interest (not compounding). Any part of a month is treated as a full month, so filing even one day into a new month adds another 1% for that month.

On what amount is 234A interest calculated?

On the net tax payable — your total tax liability (including surcharge and cess) minus TDS, TCS, advance tax and any self-assessment tax paid up to the due date. It is not calculated on your gross tax or total income.

From which date does Section 234A interest start?

From the day immediately after the due date for filing your return — usually 1 August for non-audit individuals (due date 31 July) and 1 November for audit cases (due date 31 October) — and it runs until the date you actually file the return.

Calculation

How do I calculate 234A interest with an example?

Interest = net tax payable × 1% × number of months of delay. If net tax payable is ₹1,00,000 and you file 3 months late, interest = ₹1,00,000 × 1% × 3 = ₹3,000. If you filed just one day late, it would still be one full month = ₹1,000.

Is 234A simple or compound interest?

Simple interest. It is a flat 1% per month on the net tax payable and does not compound over the delay period.

How is 234A calculated if the CBDT extends the due date?

Section 234A generally runs from the original statutory due date, not from any extended deadline, unless the CBDT extension order specifically waives 234A. Where large self-assessment tax was outstanding, courts and CBDT circulars have in the past levied 234A from the original date despite an extension, so verify the wording of each year's extension notification.

When it applies

Is 234A interest charged if I am due a refund?

No. If your tax is fully covered by TDS, TCS and advance tax so that net tax payable is nil — or you are entitled to a refund — Section 234A does not apply, even if you file the return after the due date. There is no tax base on which to charge the interest.

Does Section 234A apply to a revised return?

No. Section 234A applies only to a belated original return filed after the due date. Revising a return that was originally filed on time does not attract fresh 234A interest, though other consequences may follow if additional tax is paid late.

Does 234A apply if my income is below the basic exemption limit?

No. If there is no tax liability — for example income below the basic exemption limit with no special-rate income — there is no net tax payable, so Section 234A does not apply even on a late return.

What is the maximum 234A interest period?

There is no statutory cap; interest accrues at 1% per month from the due date until you actually file. In practice it stops once you file the belated return, and a belated return for a year can be filed only up to 31 December of the assessment year (or completion of assessment, whichever is earlier).

234A vs others

What is the difference between Section 234A and Section 234F?

234A is an interest charge — 1% per month on unpaid tax, only when tax is payable. Section 234F is a flat late-filing fee — ₹5,000, reduced to ₹1,000 when total income is up to ₹5 lakh — payable on any belated return regardless of whether tax is due. You can be charged both together.

How is 234A different from 234B and 234C?

234A is for late filing of the return; 234B is for paying less than 90% of your tax as advance tax; and 234C is for missing advance-tax instalment deadlines during the year. All three are simple interest at 1% per month but on different bases and periods, and all three can apply to the same return.

Can I avoid Section 234A interest?

Yes — file your return on or before the due date, or make sure your tax is fully paid through TDS/TCS, advance tax and self-assessment tax before the due date so that net tax payable is nil. Paying self-assessment tax before the due date, even if you file the return slightly later, reduces or removes the 234A base.

Do I pay 234A on self-assessment tax paid before the due date?

No. Self-assessment tax paid on or before the due date is deducted from your liability when computing the net tax payable, so it reduces or eliminates the 234A base. Only the tax still outstanding at the due date attracts 234A.

Done-for-you

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