Income tax demand notice 143(1): what it means and how to reply

An income tax demand notice under Section 143(1) is the one most salaried taxpayers actually receive, and the one most likely to be mistaken for something alarming. It’s a system-generated comparison of your filed return against the department’s own computation, not a scrutiny process and not an accusation, even when it shows an amount you owe.

What a 143(1) intimation actually is

Section 143(1) of the Income Tax Act covers the intimation issued after your return is processed, built primarily from your Form 26AS and Annual Information Statement (AIS). If your return matches the department’s own computation, it’s just a confirmation with no action needed. If it doesn’t, it shows either a demand (you owe more) or a revised refund (you claimed more than the department’s records support). This intimation must be sent within nine months from the end of the financial year in which the return was filed; after that window, none can be issued for that year.

Common causes of a 143(1) mismatch

Deadline and how to respond

If the intimation shows a demand, you have 30 days to respond. Start by reconciling against your own Form 26AS and AIS before deciding whether to pay or dispute; most mismatches are explainable from that comparison alone. If the demand is correct, pay it. If it isn’t, because of a genuine department-side error, you can respond disagreeing with reasons through the e-filing portal, or request a correction under Section 154 if it’s a straightforward computational mistake.

What happens if you ignore it

Doing nothing doesn’t make the demand disappear. It can sit as an outstanding balance, get adjusted against a future refund, and accrue interest in the meantime. Since a 143(1) intimation is often a taxpayer’s first encounter with a demand notice, it’s worth knowing that responding within the deadline, even just to dispute it, keeps your options open in a way that silence doesn’t.