Goods and Services Tax has transformed India's indirect tax landscape since 2017. Nearly a decade on, it remains one of the most frequently misunderstood compliance obligations for small and medium business owners. These seven practical tips will help you stay compliant, maximise your ITC, and avoid the common pitfalls that lead to notices and penalties.
Tip 1: Understand Your Registration Threshold — and Register Promptly
GST registration is mandatory if your aggregate annual turnover exceeds ₹40 lakh for suppliers of goods (₹20 lakh for special category states) or ₹20 lakh for suppliers of services (₹10 lakh for special category states).
Certain categories must register regardless of turnover — inter-state suppliers of goods, e-commerce operators, input service distributors, businesses liable under reverse charge, and importers/exporters. Delayed registration attracts penalties and liability for the entire unregistered period.
Tip 2: File GSTR-1 and GSTR-3B Accurately — Every Month
The two most critical monthly returns are GSTR-1 (details of all outward supplies, due by the 11th) and GSTR-3B (summary return with tax payment, due by the 20th). The most common and costly mistake is a mismatch between GSTR-1 and GSTR-3B. This is automatically flagged by the GSTN system and triggers notices. Reconcile both returns before filing every month without exception.
Tip 3: Reconcile GSTR-2B Every Month Before Claiming ITC
Input Tax Credit is only available for invoices that appear in your GSTR-2B — the auto-drafted ITC statement generated from your suppliers' GSTR-1 filings. Claiming ITC for invoices not in GSTR-2B is one of the leading causes of GST demands.
Download GSTR-2B by the 14th of each month
Match it against your purchase register
Chase suppliers who have not filed their GSTR-1 — their non-filing directly blocks your credit
Never claim ITC in excess of what appears in GSTR-2B
Tip 4: Understand Blocked Credits Under Section 17(5)
Not all GST paid on purchases is available as ITC. Section 17(5) of the CGST Act specifically blocks credit on motor vehicles (with limited exceptions), food and beverages, outdoor catering, club memberships, works contract services for construction of immovable property, and personal consumption items. Claiming blocked credits is a frequent cause of demand notices.
Tip 5: Comply with E-Invoicing Requirements
If your aggregate annual turnover exceeds ₹5 crore, you are required to generate IRN for all B2B invoices through the Invoice Registration Portal before issuing them. E-invoices auto-populate GSTR-1, reducing manual data entry errors. Failure to generate IRN means the recipient cannot claim ITC on that invoice.
Tip 6: File GSTR-9 and GSTR-9C Carefully
The Annual Return (GSTR-9) requires reconciling an entire year's transactions — outward supplies, inward supplies, ITC claimed, and taxes paid. The reconciliation statement (GSTR-9C) requires a CA or CMA certification for businesses above ₹5 crore turnover. File well before the 31 December deadline — last-minute filing significantly increases error risk.
Tip 7: Respond to Notices Promptly and Professionally
The GST department issues notices for ITC mismatches, turnover discrepancies, late filing, and excess refund claims. Ignoring a notice or submitting an inadequate response is the most common reason a routine query escalates into a full demand with interest and penalty.
Identify the section and the specific issue raised
Verify whether the notice is within the statutory time limit
Gather all relevant documentation
Respond within the prescribed time — usually 15 to 30 days
Engage a qualified CA for anything beyond a simple clarification
Common GST Mistakes to Avoid in 2026
Filing GSTR-3B without reconciling with GSTR-2B
Missing the GSTR-1 deadline — recipients' ITC gets delayed
Treating all GST-paid purchases as eligible for ITC
Not reversing ITC on credit notes received from suppliers
Incorrectly classifying goods or services through wrong HSN/SAC codes
Ignoring e-invoicing requirements above the threshold
How PGA & Co. Can Help
At PGA & Co. Chartered Accountants, we handle GST compliance for businesses across industries — from monthly filings and ITC reconciliation to annual returns, refund claims, and notice replies. Our team combines deep technical knowledge with practical, business-friendly advice.
📞 +91 86998-87200 | ✉ info@pgaca.in | Book a free consultation at pgaca.in/contact
Need expert guidance on this topic?
PGA & Co. Chartered Accountants can help. Speak with our team today.