How to read your Section 143(1) intimation: line-by-line reconciliation guide for FY 2024-25 returns

The CPC Bengaluru email arrived at 9:47 pm on a Wednesday, subject line 'Intimation u/s 143(1)'. Inside the password-protected PDF lay three columns of numbers that did not match the figures you had cross-checked twice before pressing 'Verify Return' on incometax.gov.in. A Rs 14,320 refund had become a Rs 8,140 demand. Where did the gap come from, and what are your next 30 days meant to look like?

For FY 2024-25 returns (AY 2025-26) filed by the statutory due date of 31 July 2025 under Section 139(1), the Centralised Processing Centre at Bengaluru will issue intimations through 31 December 2026 - the outer limit fixed by the third proviso to Section 143(1) of the Income-tax Act 1961: nine months from the end of the financial year in which the return is filed. Once the clock has run out without an intimation, the return is deemed accepted as filed. This guide walks through the three-column intimation structure, the six categories of adjustment under Section 143(1)(a), the 30-day response window, and a reconciliation worked through with FY 2024-25 numbers.

The Scenario

Suppose Ananya, a 31-year-old product manager in Bengaluru, filed her ITR-2 on 4 August 2025 for FY 2024-25 - four days after the Section 139(1) deadline of 31 July 2025, which made hers a belated return under Section 139(4). Her gross salary stood at Rs 18,40,000 with a Section 10(13A) HRA exemption of Rs 1,92,000 claimed under the old regime. She also reported Rs 38,400 of dividend income, Rs 10,000 of savings-bank interest deducted under Section 80TTA, and a short-term capital loss of Rs 27,500 on equity sold on 19 March 2025.

On 9 May 2026 the CPC intimation lands. The 'As Computed Under 143(1)' column shows HRA exemption restricted to Rs 1,36,800 (a reduction of Rs 55,200), Section 80TTA disallowed entirely because she selected the wrong interest sub-head in Schedule OS, and the short-term capital loss of Rs 27,500 marked 'not allowed to be carried forward'. The net effect: tax payable rises by Rs 20,342 plus interest of Rs 2,168 under Sections 234A and 234B.

The intimation is not an assessment - it is the output of preliminary processing under Section 143(1)(a), which CBDT instructions (Instruction No. 17/2013 read with the Finance Act 2016 amendment) restrict to six narrow grounds. Knowing whether each adjustment falls within those six grounds is the difference between paying the demand and filing a rectification request under Section 154.

Statutory Answer

Section 143(1) has three operative limbs. Sub-clause (a) lists the six grounds on which CPC may modify the return; clause (b) requires the computation to be communicated; clause (c) requires any difference of Rs 100 or more to be refunded or demanded. Where the difference is less than Rs 100, the ITR-V acknowledgement itself serves as the intimation under the fourth proviso to Section 143(1), inserted by the Finance Act 2016.

The six adjustments permitted under Section 143(1)(a) are:

Any adjustment under clause (i) to (vi) must be preceded by a prior intimation in writing or electronic mode with a 30-day window for response - the first proviso to Section 143(1)(a). If no response is received within 30 days, CPC proceeds with the adjustment. For a return filed on 4 August 2025 (which falls in FY 2025-26), the outer limit for the final intimation expires on 31 December 2026.

Worked Resolution

Returning to Ananya's case, we now reconcile each of the three CPC adjustments.

HRA reduction of Rs 55,200. Section 10(13A) read with Rule 2A of the Income-tax Rules 1962 grants exemption equal to the least of: (a) actual HRA received, (b) 50% of salary in metro cities, (c) rent paid in excess of 10% of salary. Ananya's salary for Rule 2A (basic plus DA) was Rs 8,40,000, actual HRA Rs 1,92,000, rent paid Rs 2,40,000. Her figure of Rs 1,92,000 ignored that the third limb (Rs 2,40,000 minus Rs 84,000 = Rs 1,56,000) is the binding minimum. CPC's Rs 1,36,800 used a different basic-DA split from Form 16. This is a Section 143(1)(a)(i) arithmetical-error adjustment; upload the Form 16 reconciliation in the e-Proceedings response within 30 days.

Section 80TTA disallowance of Rs 10,000. Section 80TTA caps the deduction at Rs 10,000 of savings-bank interest. Ananya's quantum was correct, but she entered the figure under 'Interest from deposit - others' in Schedule OS instead of 'Interest from savings bank'. CPC treated this as a Section 143(1)(a)(ii) incorrect claim apparent from the return. A Section 154 rectification with the corrected Schedule OS sub-head will restore the Rs 10,000.

Short-term capital loss carry-forward disallowed. Section 80 read with Section 139(3) permits a loss to be carried forward only if the return is filed within the Section 139(1) due date. Ananya filed on 4 August 2025, four days late. The Section 143(1)(a)(iii) disallowance is correct on the face of the record, and the Rs 27,500 loss cannot be carried into AY 2026-27 - no Section 154 rectification will undo this.

The current-year tax liability is not affected by the carry-forward disallowance (since there was no short-term capital gain in FY 2024-25 to set off against), so reconciling only the HRA and 80TTA items produces the following picture under the old regime:

The reconciled demand after the Section 154 rectification therefore drops to Rs 11,232 (Rs 3,23,669 minus Rs 3,12,437), against the CPC figure of Rs 20,342. Run the numbers through the income-tax calculator and the old vs new regime comparison before pressing submit, because Section 115BAC's standard deduction of Rs 75,000 under the new regime would have cut the same demand to Rs 9,486 if Ananya had toggled regimes at filing.

The 30-day response checklist

Within 30 days of the intimation's electronic communication date (visible at the top of the PDF):

1. Log into incometax.gov.in, then e-File, then Response to Outstanding Demand, and choose 'agree', 'partially agree' or 'disagree'.
2. If disagreeing, attach the recomputation in PDF with reference to the Form 16, Form 26AS, AIS and TIS line items that support your version.
3. For arithmetic errors made by CPC itself, use the e-Proceedings response rather than Section 154.
4. For factual disputes (deductions, losses, schedule mis-classification), file a Section 154 rectification within four years from the end of the financial year in which the intimation was passed.
5. If the 30-day window lapses and the demand becomes final, the recovery officer may issue notice under Section 220 within 30 days of the demand becoming due; interest under Section 220(2) at 1% per month accrues from that date.

Common reconciliation triggers

Verify the TDS column against Form 26AS using the TDS calculator, because mismatched TDS - rather than incorrect income - is the single most common driver of Section 143(1)(a)(vi) additions. For deeper context on how CPC's preliminary processing fits into the wider assessment framework, the Faceless Assessment Scheme walkthrough explains how a Section 143(1) intimation can escalate into a Section 143(2) scrutiny notice, while the Section 10(13A) HRA exemption guide lays out the three-way minimum formula with worked numbers.

FAQ

Is a Section 143(1) intimation the same as a tax notice?

No. Section 143(1) is automated preliminary processing at CPC Bengaluru; Section 143(2) is a scrutiny notice issued by the jurisdictional Assessing Officer. The 143(1) intimation can only address the six grounds listed in Section 143(1)(a). It does not examine unreported income, related-party transactions or transfer pricing - those require a 143(2) notice, which must be issued within three months from the end of the financial year in which the return is filed.

What if I do not respond to a Section 143(1) intimation within 30 days?

The demand becomes final and is uploaded to the Demand and Recovery module on incometax.gov.in. The CPC Demand Management Cell may initiate recovery under Section 220 with simple interest at 1% per month from the original demand date under Section 220(2). A Section 154 rectification may still be filed within four years, but does not automatically stay recovery - a separate stay application under Section 220(6) is needed.

Can I revise my return after receiving a Section 143(1) intimation?

Yes, if you are still within the Section 139(5) revision window, which for AY 2025-26 closed on 31 December 2025. After that, the only routes are a Section 154 rectification for a mistake apparent from the record, or an appeal under Section 246A to the Commissioner of Income-tax (Appeals) within 30 days of the intimation.

How is the refund or demand under Section 143(1) calculated?

The intimation reflects the tax payable computed under the regime - old or new - that you selected in the return, after applying the six categories of adjustment in Section 143(1)(a). The new regime under Section 115BAC currently grants a Section 87A rebate of up to Rs 60,000 for total income up to Rs 12 lakh (threshold raised by the Finance Act 2025 from FY 2025-26); the old-regime rebate stays at Rs 12,500 for income up to Rs 5 lakh. CPC then adds Section 234A interest for delayed filing, Section 234B for advance-tax shortfall and Section 234C for instalment shortfall, before netting off TDS, TCS, advance tax and self-assessment tax credits.

What does 'as computed under 143(1)' mean in the intimation PDF?

The intimation is laid out in three parallel columns: column one shows the figures as filed in the ITR; column two shows CPC's recomputation after its 143(1)(a) adjustments; column three shows the difference. If column two is higher, the difference is a demand; if lower, a refund. Any line item where columns one and two differ should be traced to one of the six adjustment grounds - the intimation itself states the clause in coded form (for example '143-1-a-vi' for a Form 26AS addition).

Will I get interest on a Section 143(1) refund?

Yes. Section 244A grants simple interest at 0.5% per month on income-tax refunds, calculated from 1 April of the assessment year to the date the refund is granted, where the refund arises from TDS, TCS or advance tax. For refunds from self-assessment tax under Section 140A, interest accrues from the later of the date the return was filed or the date the self-assessment tax was paid. Section 244A interest is itself taxable as 'income from other sources'.

Can I challenge a Section 143(1) intimation in appeal?

Yes. A Section 143(1) intimation is appealable under Section 246A(1)(a) before the Commissioner of Income-tax (Appeals), but only on the ground that the adjustment was not warranted by clauses (i) to (vi) of Section 143(1)(a). For most reconciliation issues - arithmetic mismatches, missing schedule entries, TDS not yet updated in Form 26AS - the faster route is a Section 154 rectification through the e-Proceedings module.