Income Tax Intimation Under Section 143(1): What It Means (2026)

How to · Income Tax · Return processing

Updated for 2026 · Claw Editorial

An intimation under Section 143(1) is not a scrutiny notice and usually not a cause for worry. It is the automatic result of the department processing your return. It tells you one of three things: your return is accepted as filed, you have a refund, or you owe more tax after some adjustments. This page explains how to read a Section 143(1) intimation, the adjustments it is allowed to make, the time limit to issue it, and how to respond if the numbers do not match yours. Last verified October 2026.

01What a Section 143(1) intimation is

An intimation under Section 143(1) of the Income-tax Act, 1961 is the computer generated result of processing your income tax return. The Centralised Processing Centre (CPC) checks the return against the tax department records, applies a set of permitted adjustments, and sends you the outcome by email, usually as a password protected PDF.

It is sent to almost every return filer. It is not an allegation of wrongdoing and it is not a detailed review of your case. It simply reconciles what you filed with what the department already has, such as tax deducted at source and advance tax paid.

02The three possible results

A Section 143(1) intimation shows one of three outcomes.

• No change: the income and tax you reported match the department computation. Nothing more is needed. The intimation itself is treated as the acknowledgement.
• Refund due: the department agrees you paid more than due. A refund is issued to your validated bank account.
• Tax payable: the processing shows a demand. This is where you must read the intimation closely and decide whether to agree or disagree.

03Adjustments it can make

Section 143(1) allows only a limited, defined set of adjustments. Broadly, these include:

• arithmetical errors in the return;
• an incorrect claim that is apparent from the information in the return;
• disallowance of a loss or deduction claimed late, or beyond what is allowed;
• a mismatch between the tax credit claimed and the tax credit shown in the department records; and
• additions of income appearing in other filed statements that were not included in the return.

Before most adjustments that increase your liability, the system gives you an opportunity to respond. If you do not respond within the time allowed, the adjustment is made. This is why ignoring an earlier prompt often leads to a demand in the final intimation.

04Time limit to issue the intimation

The intimation under Section 143(1) must be sent within nine months from the end of the financial year in which the return is furnished. This limit was reduced from one year by the Finance Act 2021.

For example, a return filed during the financial year 2026-27 falls in that year, so processing should be intimated by the end of December 2027. If no intimation is sent within this period, the return as filed is generally treated as the completed processing. Tribunals have held that an intimation issued after this window can be invalid.

05How to respond

1. Agree: if the demand is correct, pay it through the income tax portal within the time stated in the intimation.
2. Disagree: log in to the portal, open the outstanding demand, and submit your response selecting that you disagree, with reasons and proof.
3. File a rectification: if the demand is from an apparent mistake, such as a tax credit not picked up, file a rectification under Section 154 against the intimation.
4. File a revised return: if you made an error in the original return and the time to revise is still open, a revised return may be the cleaner fix.

If your case is later picked up for a detailed review, that is a different and more serious notice. See the scrutiny notice under Section 143(2). If a past year is reopened, see the reassessment notice under Section 148.

06Where Claw fits

Claw is an all-in-one legaltech platform for Indian advocates, law firms, and corporate legal teams, combining AI-based case search, an AI legal assistant (Legal GPT), case management, and compliance automation across all Indian courts and tribunals.

A Section 143(1) intimation is settled on the portal in the great majority of cases. It is only when a demand is pressed and you appeal that the matter leaves the system, moving to the Commissioner (Appeals), the Income Tax Appellate Tribunal and, on a question of law, the High Court. At that point two things help. You can look up how the ITAT and the courts have handled the same kind of adjustment, searching more than 30 crore judgments that run from the Supreme Court in 1950 and the High Courts in 1990, with each search answered in under five seconds. And you can keep your own appeal in view by party or advocate name, among the 9,102 courts, benches and forums Claw tracks.

Your filings are not used to train Claw, since it does not put customer case documents into its AI models. Open a free Claw account to trace how a disputed adjustment has been decided and to follow your appeal. To research the wider body of law, see case search across Indian courts.

07Sources and further reading

• Income Tax e-filing portal: incometax.gov.in
• Income Tax Department (Act and sections): incometaxindia.gov.in
• India Code (bare Act): indiacode.nic.in
• Claw: clawlaw.in

This page is general information, not legal advice. The law changes through amendments and judgments, so check the current text and take advice from a tax professional before you act.

08Frequently asked questions