GST Compliance in 2025: What Every Business Must Know

Goods and Services Tax has now been in force for several years, yet compliance remains one of the most common pain points for Indian businesses. With the GST Council continuing to refine rules, and the GSTN portal evolving rapidly, staying current is not optional — it is a legal obligation.

This guide covers the key compliance requirements for FY 2025–26, the common pitfalls businesses fall into, and the practical steps you can take to stay clean.

Understanding your filing obligations is the first step. The primary returns most registered businesses need to file are:

• GSTR-1: Outward supply details — due on the 11th of the following month (monthly filers) or the 13th of the month following the quarter (quarterly filers under QRMP)
• GSTR-3B: Summary return with tax payment — due on the 20th of the following month for most taxpayers
• GSTR-9: Annual return — due by 31st December following the end of the financial year
• GSTR-9C: Reconciliation statement (for taxpayers with turnover above ₹5 crore) — filed alongside GSTR-9

Missing these deadlines attracts late fees of ₹50 per day (₹20 per day for nil returns), capped at ₹10,000 per return. More significantly, persistent non-compliance can trigger scrutiny notices and assessments.

Input Tax Credit (ITC) reconciliation is where most businesses face challenges. The rules are clear in principle but complex in practice:

ITC can only be claimed on invoices that appear in your GSTR-2B — the auto-populated statement generated from your suppliers' GSTR-1 filings. If a supplier has not filed their return, the ITC does not appear, and you cannot claim it.

Practical implication: You need to actively monitor your supplier compliance. Chasing suppliers to file their returns is now a routine part of GST compliance for any serious business.

ITC claimed on a purchase must be reversed if payment to the supplier is not made within 180 days of the invoice date. This is a frequently overlooked rule that can result in significant ITC reversals during audits.

Certain categories of ITC are permanently blocked — including motor vehicles (with exceptions), food and beverages, club memberships, and works contract services for immovable property. Claiming these inadvertently is a common audit trigger.

E-invoicing — the generation of invoices through the Invoice Registration Portal (IRP) with a unique IRN and QR code — is now mandatory for businesses with aggregate turnover exceeding ₹5 crore in any preceding financial year.

Key points to note:

• E-invoices must be generated before or at the time of supply
• The IRN is valid for 24 hours from generation for cancellation purposes
• Failure to generate e-invoices where required renders the invoice invalid for ITC purposes for the recipient

If your turnover is approaching the threshold, it is worth implementing e-invoicing infrastructure proactively rather than scrambling at the last minute.

GSTR-9 is often treated as a formality, but it is in fact a comprehensive reconciliation of your entire year's GST activity. It requires you to reconcile:

• Outward supplies declared in GSTR-1 vs. GSTR-3B
• ITC claimed in GSTR-3B vs. ITC available in GSTR-2B
• Tax paid vs. tax liability

Discrepancies identified in GSTR-9 that are not addressed can attract demand notices. The annual return is also the last opportunity to correct errors from the financial year — amendments after GSTR-9 filing are not permitted.

Set up automated reminders for every due date. Consider using a compliance management platform that tracks deadlines across all your registrations.

Run a monthly reconciliation between your purchase register and GSTR-2B before filing GSTR-3B. Do not claim ITC on invoices absent from GSTR-2B.

Wrong HSN codes attract notices and can result in tax demand at the correct (often higher) rate. Invest time in getting your product and service classifications right.

For inter-state transactions, the place of supply determines whether IGST or CGST+SGST applies. Errors here result in wrong tax payment and require rectification through subsequent returns.

Changes in business address, addition of new places of business, or changes in authorised signatories must be updated in the GST registration promptly. Operating with outdated registration details is a compliance risk.

Manual GST compliance is increasingly untenable for businesses with significant transaction volumes. Modern compliance platforms can:

• Auto-reconcile purchase data with GSTR-2B
• Flag ITC mismatches before filing
• Track supplier compliance scores
• Automate return preparation and filing
• Maintain an audit trail for all transactions

AccentTax's Compliance Technology Platform is purpose-built for this — integrating GST compliance with your broader regulatory calendar so nothing falls through the cracks.

If you have missed filings or have unresolved discrepancies, the approach is:

1. File all pending returns — late fees apply, but non-filing compounds the problem
2. Reconcile ITC — identify and reverse any ineligible credits before they are flagged
3. Respond to notices promptly — ignoring GST notices leads to ex-parte assessments
4. Seek professional advice — a qualified tax professional can help you regularise your position with minimal exposure

GST compliance in 2025 demands more than just filing returns on time. It requires active supplier management, rigorous ITC reconciliation, correct classification, and a systematic approach to the annual return. The businesses that treat compliance as a continuous process — rather than a year-end scramble — are the ones that avoid penalties, pass audits cleanly, and build credibility with their stakeholders.

If you need a compliance review or want to understand where your business stands, get in touch with our team — we offer a free initial consultation.