GST Compliance Calendar 2026: GSTR-1, GSTR-3B, QRMP and CMP-08 Dates

Updated 2026-08-02 · By KyaTax · 5 min read

Missing a GST date means late fees and interest. Here are the recurring deadlines for 2026 for the common filing profiles.

Monthly filers

Return	Due date
GSTR-1 (outward supplies)	11th of the next month
GSTR-3B (summary + payment)	20th of the next month

QRMP scheme (small taxpayers)

Under the Quarterly Return Monthly Payment scheme, eligible taxpayers file GSTR-1 and 3B quarterly while paying tax monthly (via challan). This eases the monthly filing load.

Composition dealers

Composition taxpayers pay quarterly using CMP-08 and file an annual GSTR-4.

Specific months can be extended by notification — always confirm the current date before you rely on it.

Important: This article is general information based on laws, notifications and public sources current as of August 2026. It is not legal, tax, accounting or professional advice or opinion, and must not be relied on for any decision. Tax and legal rules change frequently and their application depends on your specific facts. Please verify the latest position and connect with a KyaTax expert or your professional advisor before acting.

Rules change often and how they apply depends on your exact numbers and facts. Don't guess on your GST filing calendar — get a qualified professional to review your case.

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Frequently asked questions

What is the QRMP scheme?

Quarterly Return Monthly Payment — eligible small taxpayers file returns quarterly but pay tax monthly. Eligibility depends on turnover; confirm before opting.

Who files CMP-08?

Composition-scheme dealers, quarterly. They also file an annual GSTR-4.

Do due dates ever change?

Yes — the government extends specific dates by notification. Check the latest before filing.

Related: GST Tools · More guides · Our expert panel