Section 143(1) Intimation Notice: Time Limit and Reply

Key Takeaways: Section 143(1) at a Glance

• Issuing authority: CPC, Bengaluru (automated); not the local Assessing Officer.
• Time limit to issue: 9 months from the end of the financial year in which the return is furnished. For AY 2025-26, return filed in FY 2025-26: deadline is 31 December 2026.
• 3 possible outcomes: (1) No demand, no refund – return accepted as filed; (2) Refund – excess tax paid is credited; (3) Demand – additional tax computed by CPC.
• 6 CPC adjustments: Only limited adjustments under Section 143(1)(a)(i) to (vi) are permitted. No new additions based on AO judgment.
• Demand payment deadline: 30 days from the Section 156 demand notice that accompanies a demand intimation.
• Interest for late payment: 1% per month under Section 220(2) from the 31st day after the demand notice.
• Remedy if you disagree: Section 154 rectification (for CPC processing errors) or Section 246A appeal to CIT(A) (for substantive disputes).
• 143(1) is NOT a clearance: Even a “no demand, no refund” intimation does not protect the return from scrutiny by the AO under Section 143(2).

Contents

1. What Is a Section 143(1) Intimation and How Is It Different from a Scrutiny Notice?
2. What Are the 6 Adjustments the CPC Can Make Under Section 143(1)(a)?
3. What Is the Time Limit for the CPC to Issue a Section 143(1) Intimation?
4. What Are the 3 Possible Outcomes of a Section 143(1) Processing?
5. How Do You Respond to a Section 143(1) Demand on the E-Filing Portal?
6. What Is a Section 154 Rectification and When Should You File One?
7. What Are the Most Common Questions About Section 143(1) Intimations?

The CPC corrects any mathematical mistake in the return – for example, if the total of Schedule OS (income from other sources) is incorrectly totalled, or if the tax liability is incorrectly computed from the income declared. The CPC uses the figures you declared but corrects the arithmetic.

If a deduction or exemption claimed in the return is obviously inconsistent with information elsewhere in the same return, the CPC can disallow it. For example: claiming HRA exemption but also declaring house property income from the same city; or claiming a 80C deduction larger than the stated investment amount. The incorrectness must be apparent from the face of the return – the CPC cannot look outside the return for this sub-clause.

Under Section 80 of the Income Tax Act, losses (other than unabsorbed depreciation under Section 32(2)) can only be carried forward if the return was filed by the due date under Section 139(1). If you filed a belated return under Section 139(4) and still claimed carry-forward of business loss, capital loss, or speculative loss, the CPC will disallow the carry-forward. This is one of the most significant consequences of a belated filing for taxpayers with losses.

If the tax audit report (Form 3CA-3CD or 3CB-3CD) indicates that certain expenditure is inadmissible under the Act (for example, Section 40A(2) excessive payments, Section 40(b) excess remuneration to partners, or Section 43B items not paid before filing), but the return does not reflect those disallowances, the CPC can add back the expenditure. This sub-clause essentially enforces consistency between the audit report and the return. For partner remuneration, see our detailed guide on Section 40(b) limits.

Deductions under Sections 10AA (SEZ units), 80-IA, 80-IB, 80-IC, 80-ID, and 80-IE are available only if the return is filed by the due date under Section 139(1). If the return was filed after the due date, the CPC will disallow these deductions even if all other conditions for the deduction are satisfied. This is a strict rule established by the Finance Act 2003 and subsequent amendments, and the Supreme Court has upheld that the time-limit condition is mandatory, not directory.

The CPC cross-references the return against Form 26AS, Form 16, Form 16A, and the Annual Information Statement (AIS). If income appears in these sources but is not included in the return, the CPC adds it. Common examples: interest income reported by banks in AIS but not declared in the return; salary from a second employer shown in Form 26AS but excluded from the ITR; dividend income reflected in AIS but omitted from Schedule OS. Before filing the return, always reconcile your income with your AIS to avoid this adjustment.

The Difference Between a 143(1) Adjustment and a 139(9) Defect: Both Are CPC, But Different Triggers

A Section 139(9) defective return notice is issued when the return is procedurally incomplete – a missing challan, absent financial statements, or wrong ITR form. The return is on hold until fixed. A Section 143(1) intimation, by contrast, is issued after the CPC has fully processed a return – it means the return was complete enough to be processed, but the CPC found arithmetic differences, AIS mismatches, or the 6 adjustment-triggering issues. The 143(1) intimation is an outcome, not a hold notice. If your return has been processed and you have a 143(1) intimation showing a demand, the 139(9) window is closed – you are now in the 143(1) remedy framework (rectification or appeal), not the 139(9) response framework.

Never Ignore a Section 143(1) Demand: Interest Under Section 220(2) and Recovery Powers

Ignoring a 143(1) demand is not a neutral act. From the 31st day after the Section 156 demand notice, interest at 1% per month or part of a month begins accruing on the unpaid demand under Section 220(2). After issuing a penalty notice under Section 221(1), the AO can also levy a penalty up to the amount of the arrear tax. Beyond penalties, the Income Tax Department has sweeping recovery powers: garnishee notices can be sent directly to your employer, bank, or debtors requiring them to deduct the arrear from amounts payable to you (Section 226(3)); your bank accounts can be attached (Section 226(4)); your property can be sold through the Tax Recovery Officer (Section 222); and your employer can be directed to deduct the arrear from your salary (Section 226(2)). Even if you plan to challenge the demand through a rectification or appeal, apply for a stay of demand in writing to the AO simultaneously, and continue monitoring the outstanding demand status on the portal so coercive recovery action does not surprise you. For MSME businesses, any recovery action can seriously disrupt operations – see our guide on Section 43B(h) and MSME payment compliance for a broader picture of income tax obligations relevant to small businesses.

What is the difference between a Section 143(1) intimation and a Section 143(3) assessment order?

A Section 143(1) intimation is an automated summary processing result issued by the CPC without human examination. The CPC applies only the 6 adjustments listed in Section 143(1)(a) and cannot make any additions requiring judgment or external evidence. It is not an assessment order and cannot be cited as one. A Section 143(3) assessment order is issued by the AO (or NaFAC under the Faceless Assessment scheme) after a full scrutiny of the return under Sections 142(1) and 143(2). It involves examining books, documents, and third-party information, and the AO’s findings are recorded in the order. The AO can add any income or disallow any expenditure if the evidence supports it. A 143(3) order can be appealed to CIT(A) under Section 246A; a 143(1) intimation is contested by Section 154 rectification for processing errors, or by Section 246A appeal for more complex disputes. Our guide on the Section 142(1) inquiry notice explains the scrutiny process that leads to a 143(3) order.

Can the CPC add income not declared in the return under Section 143(1)?

Yes, but only through Sub-clause (vi): the CPC can add income appearing in Form 26AS, Form 16, Form 16A, or the Annual Information Statement (AIS) that was not included in the return. This covers bank interest reported in AIS but omitted from Schedule OS, salary from a second employer visible in Form 26AS but not declared, dividend income reflected in AIS but missing from the return, and similar. However, the CPC cannot add income based on third-party intelligence, information from surveys, or any source beyond Form 26AS and AIS. Additions of that nature require a Section 148 reassessment with prior PCIT/CIT approval, or a full scrutiny assessment under Section 143(2). If the CPC has added income under 143(1)(a)(vi) and the AIS entry itself is wrong (e.g., the bank incorrectly reported your FD interest as new income), raise a feedback on the AIS entry first and then file a Section 154 rectification citing the AIS error as the basis.

What happens if you do not pay a Section 143(1) demand within 30 days?

Interest under Section 220(2) starts accruing at 1% per month from the 31st day after the Section 156 demand notice date. The AO can also issue a penalty notice under Section 221 and levy a penalty up to the amount of the tax in arrears. For persistent non-payment, the Department can initiate coercive recovery: bank account attachment under Section 226(4); garnishee notices to your employer, debtors, or other persons holding amounts payable to you under Section 226(3); and attachment and sale of property through the Tax Recovery Officer under Section 222. If you disagree with the demand, never simply ignore it – file a Section 154 rectification or a Section 246A appeal and simultaneously submit a written application for stay of demand under Section 220(6) to the AO, requesting that recovery be held pending the outcome of the rectification or appeal. An unconditional stay is rarely granted; partial stays (deposit of 20% of demand) are standard practice.

Can you appeal against a Section 143(1) demand?

Yes. Under Section 246A, an assessee can appeal to the Commissioner of Income Tax (Appeals) against a demand arising from a Section 143(1) intimation. The appeal must be filed in Form 35 within 30 days of receipt of the Section 156 demand notice, with the applicable fee (Rs 250 for income below Rs 1 lakh, Rs 500 up to Rs 2 lakh, Rs 1,000 above Rs 2 lakh), a statement of facts, and the grounds of appeal. The Faceless Appeal scheme now handles most 143(1) appeals digitally through the National Faceless Appeal Centre (NFAC). However, for cases where the demand arises from a clear TDS mismatch or AIS error, Section 154 rectification is a faster and cheaper remedy – it typically resolves in 30 to 60 days without formal litigation, while an appeal can take 6 to 18 months. Use the appeal route for cases where the CPC’s adjustment involves a substantive legal question that cannot be resolved by a simple correction to the data.

Does receiving a Section 143(1) intimation with no demand mean the return is cleared and cannot be scrutinised?

No. A “no demand, no refund” Section 143(1) intimation means the CPC has processed the arithmetic and AIS reconciliation and found no discrepancy. It does not mean the Assessing Officer has examined or approved the return. The AO retains independent power to issue a Section 143(2) scrutiny notice for any return within 6 months of the end of the assessment year (for AY 2025-26: by 30 September 2026), regardless of whether a 143(1) intimation has been issued. A 143(1) intimation and a 143(2) scrutiny notice can both be in force for the same return at the same time. If the AO issues a Section 143(2) notice after a 143(1) refund has already been processed and paid, the refund may be reversed if the AO’s scrutiny leads to a higher assessment under Section 143(3). The intimation is a processing receipt, not a certification of correctness. See our complete overview of notices in the assessment process in our guide on Section 139(9) defective return notices.