If you missed the original ITR due date, you can usually still file a belated return under section 139(4) of the Income-tax Act, 1961, but it costs you a late fee, interest and a few tax benefits. This guide explains how a belated return works, what it costs and how to file it cleanly.
What is a belated return?
A belated return is an income tax return filed after the due date in section 139(1). Missing the due date does not close the door. For assessment year 2026-27 (income earned in FY 2025-26), the law lets you file a belated return up to 31 December 2026, subject to the conditions below. Confirm the current last date on the income tax portal, because dates can change by notification.
Audit cases follow the same logic. If your accounts need a tax audit, the original date is later (31 October by default), as covered in our audit-case ITR checklist. After that date passes, the belated route applies to you too.
What does filing late cost?
Three things can add to your bill:
- Late fee under section 234F: generally ₹5,000, reduced to ₹1,000 if your total income is not more than ₹5 lakh. If you have no taxable income, the fee still applies in principle to a late return, so check the rule for your case.
- Interest under section 234A: 1% per month or part of a month on the unpaid tax, counted from the original due date until you pay.
- Interest under sections 234B and 234C: applies if advance tax was short or paid late. Read our note on the advance tax instalments and interest to see how these work.
What benefits can you lose?
Filing after the due date affects more than money:
- Certain losses, such as business losses and capital losses, generally cannot be carried forward if the return is late. Loss from house property is treated differently, so check with your CA.
- Some deductions and exemptions linked to timely filing may not be available. The rules differ by provision.
- Refund processing starts only after you file, and interest on refunds is calculated from the date of the return in this case.
Who can file a belated return?
Most taxpayers who missed the date can, whether individuals, firms or companies. The key limits are the last date for belated filing and, once the assessment is complete, the end of the assessment year. Taxpayers who got a notice under section 142(1) or 148 follow the process in that notice instead.
How to file it step by step
- Pick the right form: use the ITR form that fits your income and status, just as you would for a timely return.
- Tick the correct filing section: choose section 139(4) in the filing options on the portal.
- Match your TDS credits: compare Form 26AS and AIS with your books before you fill in income. Our guide to 26AS and AIS reconciliation before ITR shows how.
- Compute tax and interest: pay the tax, 234A interest and the 234F fee through challan before submitting. Self-assessment tax is paid before you file, not after.
- File and e-verify: submit, then e-verify within the time the portal allows. An unverified return is treated as not filed.
If you spot a mistake after filing
A belated return can usually be revised under section 139(5) before the end of the assessment year, so a wrong figure is fixable. Do not file twice hoping to overwrite the first one; use the revised return option.
Keep your books ready before you file
Most late filers lose time hunting for numbers, not filling the form. Keep a trial balance, profit and loss account and a reconciled bank statement before you sit down to file. Our walk-through of the revenue and expense registers in Smart Books shows how to trace a figure back to its entries.
A simple illustration of the cost
Say a trader with total income of ₹8 lakh owes ₹20,000 as net tax after TDS and files two months and some days after the due date. The section 234F fee would be ₹5,000, because income is above ₹5 lakh. Interest under section 234A would run for three months or part of a month at 1% on ₹20,000, which is ₹600. The figures are only an example; your own numbers depend on the tax actually unpaid and the exact date of payment.
Common mistakes to avoid
- Waiting for the last day: the portal is slow near deadlines, and a return that misses the belated date cannot be filed at all without special permission.
- Ignoring AIS entries: income shown there but missing in your return can lead to a notice later.
- Skipping e-verification: the return is incomplete until it is verified.
- Not paying tax first: a return with unpaid self-assessment tax is treated as defective and may be invalid.
Key takeaways
- A belated return under section 139(4) is usually allowed until 31 December of the assessment year, but check the portal for the current date.
- Expect a section 234F fee (generally ₹5,000, or ₹1,000 for income up to ₹5 lakh) and 1% a month interest under section 234A.
- Some losses cannot be carried forward when you file late.
- Reconcile 26AS and AIS first and e-verify promptly.
- Confirm specifics with your chartered accountant, as rules and dates change.
When your ledgers are in order, filing late becomes far less stressful. Aicountly Smart Books includes a Trial Balance, Balance Sheet, Profit & Loss and a Bank Reconciliation report, so the figures for your return are in one place.
