Every year around the first week of August, we get the same phone call. A business owner has seen “ITR deadline over” in a news headline, assumed they have missed it, and spent a weekend worrying about a penalty they do not owe.
They have not missed anything. Their deadline has not arrived yet.
For AY 2026-27, the income tax return calendar is staggered. There is no single date. Which one applies to you depends on what kind of income you earn and whether your accounts need a tax audit. Getting that wrong in either direction costs you: either you panic early, or you relax past a date that was actually yours.
Here is the full picture.
The calendar for AY 2026-27
| Who you are | Return | Due date |
|---|---|---|
| Salary, pension, one house property, capital gains | ITR-1, ITR-2 | 31 July 2026 (passed) |
| Business or profession, no tax audit required | ITR-3, ITR-4 | 31 August 2026 |
| Accounts requiring tax audit under section 44AB | Audit report | 30 September 2026 |
| Accounts requiring tax audit under section 44AB | Return | 31 October 2026 |
| Transfer pricing report under section 92E | Return | 30 November 2026 |
| Belated return, any category | ITR-U window separate | 31 December 2026 |
| Revised return, any category | 31 March 2027 |
Note that AY 2026-27 covers income earned in FY 2025-26, that is 1 April 2025 to 31 March 2026. It is still filed under the Income-tax Act, 1961, even though the new Act took effect from April 2026. More on that in a separate post.
Who sits in the 31 August bucket
This is the group most likely to get it wrong, because it is the group that grew.
You file by 31 August 2026 if you have income from business or profession, you are filing ITR-3 or ITR-4, and your accounts are not required to be audited. That includes:
- Proprietors below the audit turnover threshold
- Professionals such as consultants, architects, doctors and freelancers under the presumptive scheme in section 44ADA
- Small businesses under presumptive taxation in section 44AD
- Transport operators under section 44AE
- Partners in firms, where the firm itself is not under audit
The trap is the word “presumptive.” People assume that because presumptive taxation is simplified, the deadline must be the simple one, 31 July. It is not. Presumptive filers who are not liable to audit get until 31 August.
The second trap is mixed income. If you draw a salary and also run a consultancy on the side, the business income pulls you into ITR-3 or ITR-4. Your deadline moves with the return form, not with the salary.
What it actually costs to miss it
Not filing on time is not just a slap on the wrist. Four things happen, and the fourth is the one nobody sees coming.
A late fee under section 234F. Up to ₹5,000. If your total income is below ₹5 lakh, it is capped at ₹1,000.
Interest under section 234A. Charged on any unpaid tax from the due date until you actually file. This runs on top of the late fee, and on top of any 234B and 234C interest you may already owe on advance tax shortfalls.
Loss of carry-forward. This is the expensive one. Business losses and capital losses can only be carried forward to future years if the return is filed by the due date. Miss it, and a loss you were counting on to shelter next year’s profit simply disappears. For a business coming off a bad year, this can be worth several times the late fee.
No regime switch. If you file a belated return, you lose the option to choose the old tax regime for that year. You are locked into the default. For anyone with substantial deductions under the old regime, that is a real number.
Think of the due date as a door rather than a speed bump. The late fee is what you pay to squeeze through afterwards. The carry-forward and the regime choice are things left on the other side of it.
What to do in the next three weeks
If 31 August is your date, work backwards from it rather than towards it.
- Confirm which form applies. ITR-3 if you have business or professional income with books, ITR-4 if you are presumptive and eligible. Filing the wrong form is not fixable by revision in every case.
- Reconcile Form 26AS and AIS against your books. Mismatches between what deductors reported and what you recorded are the single most common cause of a notice six months later. Fix them now, not after filing.
- Check whether audit actually applies to you. Turnover thresholds and the cash receipt and payment tests decide this, not your assumption. If audit does apply, your date is 31 October and the audit report is due 30 September, which means the work starts now regardless.
- Settle any self-assessment tax before you file, so interest stops running.
- Keep the acknowledgement and verify within 30 days. An unverified return is treated as not filed at all. People forget this one every year.
One caveat worth stating plainly
Due dates get extended. It happens most years, sometimes days before the deadline, usually because of portal load or a late form notification. Nothing above assumes an extension, and you should not either. If one is announced, treat it as breathing room rather than the plan.
Equally, the position described here reflects the rules as they stand at the time of writing. If you are reading this months later, confirm the current position before you act on it.
If you are not sure which date is yours
The honest answer is that this takes ten minutes to determine and a full year to fix if you get it wrong. Turnover, the nature of your receipts, whether you have opted into presumptive taxation and whether you have crossed an audit trigger all feed into it.
If you would like us to look at your specific position, get in touch. We will tell you which date applies to you and what needs to be ready before it.