What is Belated Return?

A belated return is an income tax return filed after the due date but before 31 December of the assessment year, under section 139(4).

It is a legitimate filing, not a penalty-free one. Section 234F charges a late fee of ₹1,000 where total income is below ₹5 lakh and ₹5,000 where it is above. Interest under section 234A runs at 1% a month on unpaid tax.

The real cost is what you lose: business losses and capital losses cannot be carried forward, though a house-property loss still can.

Why it matters

Missing 31 December means you cannot file a normal return at all — only an updated return under section 139(8A), which requires paying additional tax of 25% or 50% on top.

The statutory position

Each figure with the provision it comes from, so it can be checked.
What	Position	Source
Deadline	31 December following the financial year	Section 139(4), Income-tax Act 1961
Late filing fee	₹5,000, reduced to ₹1,000 where total income is under ₹5 lakh	Section 234F, Income-tax Act 1961
Interest on unpaid tax	1% per month from the original due date	Section 234A, Income-tax Act 1961
Losses	Business and capital losses cannot be carried forward; house property loss can	Section 80 read with section 139(3)

Not to be confused with

These get used interchangeably, including by tools that should know better. They are different things.

Revised return

A revised return corrects a return already filed. A belated return is a first return filed after the due date. Both share the 31 December deadline but they do different jobs.

Updated return

An updated return under section 139(8A) is available for years long past the belated window — up to 48 months — but only to declare additional income, with additional tax on top. It cannot produce a refund.

Questions people ask

Can I still get a refund on a belated return?

Yes. A belated return can claim a refund, which is why filing late is still much better than not filing. What you lose is the carry-forward of most losses, plus the fee and the interest.

What if I miss 31 December too?

The belated window closes and only an updated return under section 139(8A) remains — which allows extra tax to be declared but cannot claim a refund. A year with a refund owing that passes 31 December has effectively lost it.

What usually goes wrong

Filing a loss year late and losing the carry-forward, which is usually worth far more than the fee
Assuming a belated return cannot be filed at all after the due date
Missing 31 December and dropping into the updated-return regime, where refunds are not available