The mistakes that cost the most
After handling a lot of GST work, the same avoidable errors come up again and again. Here they are, with the fix for each.
- Skipping Nil returns — “no sales” still needs a return; skipping it triggers a daily late fee. File it, even if it’s nil.
- Over-claiming input tax credit — claiming ITC beyond your GSTR-2B invites interest and reversal. Claim only what’s actually there.
- Mismatching GSTR-1 and GSTR-3B — the two should reconcile; a gap is a classic scrutiny trigger.
- Missing the reverse-charge liability — transporter or advocate bills often need RCM; forgetting it creates a hidden liability.
- Wrong HSN/SAC codes — misclassifying to a lower rate is a common cause of demand notices.
- Not reconciling purchases — if your supplier hasn’t filed, your credit isn’t in 2B; catch it monthly, not yearly.
- Charging CGST+SGST on inter-state sales (or vice versa) — getting place of supply wrong disturbs your returns and your buyer’s credit.
- Letting the e-way bill expire in transit — extend it before expiry, or risk detention.
- Ignoring notices — they have strict deadlines; a missed reply can escalate to cancellation or demand.
- Registering when you didn’t need to — taking on monthly filing you could have avoided. Check first.
The pattern behind them
Notice the theme: most GST problems aren’t dramatic — they’re small, routine things missed because someone was busy running their business. The late fee for a forgotten Nil return, the credit lost because a supplier didn’t file, the notice that sat unopened. None of them are hard to avoid; they just need someone watching consistently.
How to stay clear of all ten
Systematic monthly filing prevents almost every one of these. That’s exactly what our ₹499/month plan is — we reconcile your purchases against 2B, keep GSTR-1 and 3B aligned, file on time including Nil months, apply correct codes, and flag anything unusual. It turns GST from a source of avoidable mistakes into a routine that just happens.