---
type: "tool"
title: "GSTR Due Date Finder"
description: "Free GSTR due date finder — instantly find the filing deadline for GSTR-1, GSTR-3B (monthly or QRMP), GSTR-9, GSTR-4 and CMP-08."
resource: "https://www.gstcalculators.in/gstr-due-date-finder.html"
language: "en"
bundle_generated: "2026-10-12"
---

# GSTR Due Date Finder

Free GSTR due date finder — instantly find the filing deadline for GSTR-1, GSTR-3B (monthly or QRMP), GSTR-9, GSTR-4 and CMP-08.

- Canonical page: [GSTR Due Date Finder](https://www.gstcalculators.in/gstr-due-date-finder.html)
- Publisher: [Tool Master Hub / GSTCalculators.in](../site.md)
- Category: [Basic Financial Calculators](../categories/basic.md)

This is a discovery summary of the public page, not an independently reviewed replacement. Use the canonical page for current inputs, assumptions, formulas, source links and results. The bundle generation date does not mean that tax rules were reviewed on that date.

## Topics on the page



## Questions and answers from the visible page

### What are QRMP State Groups?

Group A includes Chhattisgarh, MP, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh and UTs of Daman & Diu, Dadra & Nagar Haveli, Puducherry, Andaman & Nicobar, Lakshadweep (GSTR-3B due 22nd). Group B covers the remaining states and UTs (due 24th).

### Do due dates ever get extended?

Yes, CBIC periodically extends due dates through notifications, especially during portal outages or major law changes — always double-check on the GST portal close to your deadline.

### What is CMP-08?

A quarterly statement-cum-challan for composition scheme taxpayers to pay tax — it isn't a full return, but has its own due date (18th of the month after the quarter).

## Accuracy and corrections

[Methodology](https://www.gstcalculators.in/methodology.html) · [Editorial policy](https://www.gstcalculators.in/editorial-policy.html) · [Disclaimer](https://www.gstcalculators.in/disclaimer.html) · [Report a problem](https://www.gstcalculators.in/contact.html).