Section 143(1) Intimation Explained: How to Read It, and What to Do About a Demand or Refund

Rohit, a salaried engineer in Pune, filed his return in July, got his refund expectation of ₹12,400 in his head, and then opened an email from the department showing a demand of ₹8,700 instead. His first instinct — that he was under scrutiny — was wrong, and his second instinct — to ignore it and hope it went away — would have been worse. The document was a Section 143(1) intimation: a computer’s summary of his return, not an officer’s investigation. The gap turned out to be simple: interest of ₹41,000 from a savings account he had forgotten to report, plus a TDS credit his employer had filed under a slightly different PAN spelling. Both fixable, neither a scandal. If you have filed a return, this is the document most likely to land in your inbox next — and knowing how to read it saves a month of worry.

For the wider assessment picture, see the income-tax hub’s filing and assessment guides and what a 143(2) scrutiny notice really means and how to reply — the human-led process that is different from this automated one. If the intimation flags a defect instead of a computation difference, the defective-return notice guide and its 6 common defects covers the fix. When tax you paid never shows up in department records, what to do when TDS deducted is missing from your 26AS or AIS sets out the correction path, and the compliance calendar hub keeps every filing and response deadline in one place.

What a 143(1) intimation actually is

Under the Income-tax Act, 2025 — the successor to the 1961 Act, whose Section 143(1) is the provision most taxpayers still know by that number — return processing is the first, automated step after filing. The Centralised Processing Centre (CPC) in Bengaluru runs a set of computer checks: arithmetical accuracy, internal consistency, comparison with Form 26AS, the Annual Information Statement (AIS) and the Taxpayer Information Summary (TIS), and application of the correct tax computation. No officer reads your return at this stage. The intimation that follows is the CPC’s report card: your figures as filed, its figures as processed, and the difference.

How to read the computation table

Open the intimation PDF and find the comparison table. It has, in substance, three columns: returned income and tax as you filed them, processed income and tax as the CPC computed them, and the difference. Then a final outcome line: refund due, amount payable, or no demand and no refund. Worked example: you declared total income of ₹14,20,000 and tax payable of ₹1,12,000 after TDS of ₹1,05,000, leaving ₹7,000 to pay. The CPC processes interest income of ₹35,000 you omitted, pushing total income to ₹14,55,000 and tax to ₹1,19,500 — a demand of about ₹14,500 once interest is added, instead of the ₹7,000 you expected. The table shows exactly which line moved, so you never have to guess.

The five mismatches that cause most demands

First, TDS credit mismatch: the TDS you claimed does not match Form 26AS or the TIS, often because the deductor filed late, filed under a wrong PAN, or has not filed the quarterly return yet. Second, unreported income: savings-account interest, fixed-deposit interest, dividends or capital gains that appear in the AIS but not in your return. Third, deduction over-claims: an 80C or 80D claim above the statutory cap, or a claim without the supporting investment or premium actually made. Fourth, arithmetical or schedule errors: income entered under the wrong head, or a loss set off in a way the system does not allow. Fifth, a proposed adjustment you never answered: where the CPC spots a mismatch, it often sends a proposed-adjustment communication first, seeking a response within 30 days. No response, and the system finalises the adjustment as proposed.

Here’s the catch that turns a small error into a demand: the CPC processes what is in its records, not what you meant. A TDS certificate in your drawer is not a credit until the deductor’s return puts it in the system. If your employer or bank has not filed, your first move is with them, not with the department — a correction by the deductor fixes the record, and a rectification then fixes the intimation.

What to do when the demand is wrong — and when it is right

Step one: compare line by line — intimation, your filed return, Form 26AS, AIS and TIS, and your challans. Step two: decide which bucket you are in. If the demand is correct — you did miss income or over-claim a deduction — pay it through the e-filing portal (challan for regular assessment tax) within the time given, and keep the challan. Interest stops running once you pay, and an unpaid demand can later be adjusted against a future refund.

If the demand is wrong, you have two main routes. Rectification is for apparent mistakes in the record — a TDS credit misread, an obvious arithmetic error, a data-pickup slip. File it online against the intimation number, which is why you should note that number down when the intimation arrives. A revised return is the cleaner route when the error is in your own filing and you are still within the revision window — a material correction, such as adding a missed income schedule or fixing a claim, belongs in a revised return, which then gets processed afresh and produces a new intimation. If you are outside the revision window and the income only needs to be increased, the updated-return route (up to 24 months from the end of the assessment year) is the fallback the law provides. Pick one route and follow it through; filing both a rectification and a revised return for the same error creates a tangle the CPC has to unpick.

Checklist: the day an intimation arrives

• Read the outcome line first — refund, demand or nothing — before reading anything else.
• Note the intimation number and the assessment year; you need both for any rectification.
• Compare the computation table line by line with your filed return, not just the final figure.
• Cross-check every moved line against Form 26AS, AIS and TIS.
• Answer any proposed adjustment within its 30-day window — silence is treated as acceptance.
• If the demand is right, pay promptly; if wrong, rectify or revise — never ignore it.
• Keep the intimation PDF with your return papers for that assessment year.

FAQs

Is a 143(1) intimation the same as a scrutiny notice?
No. It is an automated processing outcome from the CPC. Scrutiny is a separate, human-led examination under Section 143(2) and its 2025-Act successor, with its own notice and document requests.

Do I need to reply if the intimation shows no demand and no refund?
No action is required. The return has been processed as filed, and the intimation is simply the confirmation.

What if my refund is shown but never credited?
Check that the bank account on the portal is pre-validated and linked to your PAN, then raise a refund reissue request on the e-filing portal. Do not file a fresh return for a missing refund.

Sources

Section 143(1) of the Income-tax Act, 1961, as carried forward in the return-processing framework of the Income-tax Act, 2025 (Income Tax Department) — automated processing of returns by the Centralised Processing Centre, comparison with departmental records including Form 26AS, AIS and TIS, and intimation of the processed computation with refund or demand outcome. Proposed-adjustment communication under the proviso to Section 143(1)(a) (Income Tax Department) — response window of 30 days before the adjustment is finalised. Rectification of mistakes apparent from the record under Section 154 of the 1961 Act and its 2025-Act successor, and revision of returns under Section 139(5) of the 1961 Act and its successor — the two correction routes described above. Statutory processing window of nine months from the end of the financial year in which the return was furnished, per the 143(1) framework.