GSTR-9 due date: annual return basics and GSTR-9C

What GSTR-9 is and who files it

GSTR-9 is the annual return for the financial year. It brings together the outward supplies, inward supplies, input tax credit, tax paid, and other figures that appeared across the year's GST filings. It is not a substitute for the monthly or quarterly returns. It is the year-end check on them.

The normal starting point is the regular registered taxpayer. The annual-return provisions exclude categories such as input service distributors, taxpayers paying tax under the TDS or TCS provisions, casual taxable persons, and non-resident taxable persons. Composition taxpayers follow the form and rules notified for their scheme. A notification can also exempt a class of taxpayers for a particular financial year, so the label "regular taxpayer" is not the whole test.

GSTR-9 due date by financial year

Section 44 of the CGST Act sets the usual annual-return date as 31 December following the end of the financial year. The table applies that rule before any year-specific extension or exemption.

Treat 31 December as the ordinary statutory date, not a promise that every taxpayer has to file that form. The GST portal shows the due date against the selected financial year and taxpayer profile. That screen is useful, but an exemption or extension should still be matched to its official notification.

GSTR-9 and GSTR-9C compared

The two forms sit together, which is why their names are often treated as if they were one filing. They do different jobs.

The threshold and certification requirements for GSTR-9C have changed over time. Use the rules and notification for the relevant financial year, not a threshold copied from an older checklist. The GST portal's annual-return workflow also makes the sequence visible: the GSTR-9C tile becomes available after the annual return has been filed when the form applies.

What to reconcile before filing

GSTR-9 is easier when you reconcile during the year. If you leave the work until December, the form becomes a hunt through old invoices and amended returns. Build the review around the figures that feed the annual return:

• Compare books and sales registers with GSTR-1, including credit notes, debit notes, exports, exempt supplies, and amendments.
• Match the tax paid and input tax credit reported in GSTR-3B with the ledger and payment records.
• Check input tax credit reversals, reclaims, blocked credit, and credits that were taken in the following financial year.
• Review the auto-populated data on the GST portal instead of assuming that every prefilled number is correct.
• Keep a written explanation for differences between the books, GSTR-1, GSTR-3B, and the annual return.

The aim is not to make every number identical by force. Some figures move into the next financial year under the rules. The aim is to know why a difference exists and where it should be reported.

When the annual return is complete

Filing GSTR-9 is not always the end of the annual-return process. If GSTR-9C applies, the complete filing requires the reconciliation statement as well. The GST portal states that GSTR-9C can be filed only after GSTR-9 for the relevant year.

Late fee treatment can also depend on which part of the annual return is filed and when. The GST portal's FAQ for FY 2024-25 explains that late fee for GSTR-9C is calculated from the later of the GSTR-9 filing date or the annual-return due date until GSTR-9C is filed. Check the current portal calculation and notification rather than estimating from a generic annual-return article.

How exemptions and extensions work

GST annual-return exemptions and extensions are usually specific to a financial year and a class of taxpayers. A notification may exempt taxpayers below a stated aggregate turnover, extend a date for a named year, or change a form requirement. It does not automatically rewrite the next year's annual return.

Read the operative part of the notification. Look for the financial year, the form named, the class of registered person, the new date, and any condition attached to the relief. A portal advisory can help you find a task, but the notification is what tells you whether a statutory date was changed.

How to confirm your due date

1. Log in to the GST portal and open Services, Returns, and Annual Return.
2. Select the financial year and read the GSTR-9 tile. Note whether the portal shows GSTR-9C for your GSTIN.
3. Search the CBIC central tax notifications for a notification that names your financial year or filing category.
4. If an extension exists, save the PDF with your working papers and record the exact new date and scope.
5. File GSTR-9 first, then complete GSTR-9C if the rules for that year require it.

Common GSTR-9 mistakes

• Treating the 31 December date as universal without checking whether the taxpayer is exempt or a different return applies.
• Filing GSTR-9C before GSTR-9, or treating the reconciliation statement as a replacement for the annual return.
• Copying an old GSTR-9C turnover threshold into the current year's checklist.
• Ignoring amendments, credit notes, and input tax credit claimed in the next financial year.
• Treating a GSTN advisory or forwarded message as an extension without opening the CBIC notification behind it.

Where Complied AI fits

GSTR-9 dates, exemptions, and filing instructions can change through CBIC notifications and GST portal advisories. Complied AI keeps CBIC and GST updates in one feed so you can open the source document behind a change instead of relying on an old annual-return checklist. When you need the legal rule, open the GST Act or the relevant notification next to the update.