GST Calendar for August 2025 showing important GST return and payment due dates including GSTR-7, GSTR-8 on 10 August, GSTR-1 on 11 August, GSTR-5 and GSTR-6 on 13 August, GSTR-3B on 20 August, and PMT-06 on 25 August, with contact number for Tax Salah for more information.

August 2025 GST Filing Dates & Deadlines:

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1. Scheduled Downtime: GST Portal Unavailability

The GST Common Portal will be unavailable for 8 hours on August 2 and 3, 2025, due to a scheduled disaster recovery drill. Taxpayers should plan accordingly to avoid filing disruptions.

2. Key Filing Deadlines for July 2025 (due in August)

DateReturn/TaskApplicable For
10 August 2025GSTR-7 (TDS return) & GSTR-8 (TCS return)Govt. deductors and e-commerce operators taxsalah.com
11 August 2025GSTR-1 (Outward supplies)Taxpayers with turnover > ₹5 cr or those opting for monthly filing
13 August 2025GSTR-5 (Non-resident taxpayers) & GSTR-6 (Input Service Distributors) & IFF (Invoice Furnishing Facility)Non-residents, ISDs, and QRMP taxpayers (optional uploading of B2B invoices)
20 August 2025GSTR-5A (OIDAR service providers) & GSTR-3B (Monthly summary return)For July tax period—applies broadly to regular taxpayers
20–24 August 2025GSTR-3B (QRMP—quarterly filers by state group)Q1 Apr–Jun 2025: Group A states due 22 Aug; Group B states due 24 Aug https://taxsalah.com/gst.php
25 August 2025PMT-06 (QRMP scheme tax & interest payment)QRMP taxpayers (monthly payments for July)
28 August 2025 (from TaxGuru)GSTR-11 (UIN holders’ returns)UIN-based taxpayers

3. Broader Regulatory Developments

  • Lockdown on GSTR-3B edits: From the July 2025 tax period onward, GSTR-3B returns will be non-editable. Corrections will only be allowed through GSTR-1A, which complicates error rectification and may delay Input Tax Credit (ITC) for recipients.
  • Three-Year Time Bar for Return Filing: As of July 1, 2025, GST returns older than three years from their original due date cannot be filed. This zero-grace policy requires firms to reconcile and submit any pending returns well before the window closes.

Navigating the August 2025 Filing Landscape
Early Planning Matters

  • Account for portal downtime: Don’t plan critical filings on August 2 or 3; complete tasks in the first week to avoid delays.
  • Track multiple deadlines: Be vigilant of the closely spaced filings—10th, 11th, 13th, 20th, and late-month dues.

QRMP Filers: Use IFF Strategically
If you’re under the QRMP scheme, you can opt for the Invoice Furnishing Facility—a tool stopping at 13 August. It allows beneficiaries to claim ITC even if you file GSTR-1 quarterly.

Avoiding Compliance Pitfalls

  • Accuracy is now non-negotiable: With GSTR-3B locked and GSTR-1A corrections causing delays, any errors can disrupt ITC claims for your buyers. Ensure GSTR-1 accuracy to avoid cascading impacts.
  • Time-barred risks: Missed filings older than three years are irrecoverable—take stock of old dues now!

What to Remember

  • 10 August: GSTR-7, GSTR-8
  • 11 August: GSTR-1
  • 13 August: GSTR-5, GSTR-6, IFF
  • 20–24 August: GSTR-3B and GSTR-5A
  • 25–28 August: QRMP PMT-06 and GSTR-11

Rise Above the Complexity
August 2025’s GST landscape is a minefield of deadlines, tightened compliance regimes, and system constraints. But with prior planning, error-free inputs, and a QRMP strategy, businesses can navigate seamlessly:

  • Start early: File before downtime.
  • Double-check GSTR-1 and all returns.
  • Leverage IFF if eligible.
  • Reconcile and clear pending filings before they become permanently barred.

By staying informed and proactive, your August GST schedule becomes an opportunity for smooth compliance—not a ticking compliance bomb.

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