Quick answer: After getting a GSTIN, three rules trip up new businesses: (1) furnish bank account details within 30 days of registration or before your first GSTR-1, whichever is earlier, or risk suspension under Rule 10A; (2) file returns on time, including nil returns; (3) display your certificate and GSTIN at every business premises.
For most new businesses, the GST number feels like the finish line. It isn't. Not registered yet? See our guide to GST registration online in 2026. Already registered? Here are the three rules that cause problems most often.
Rule 1: Add Your Bank Account Details on Time
GST registration can be granted without bank details, but under Rule 10A of the CGST Rules you must furnish them on the portal within 30 days of registration, or before filing your first GSTR-1 (or using the Invoice Furnishing Facility), whichever is earlier.
What happens if you miss it: your registration can be suspended, and GSTN has announced the portal will apply this automatically, disrupting your ability to operate under GST.
How to add them: log in to the GST portal and file a non-core amendment under Services > Registration > Amendment of Registration (Non-Core Fields). Once furnished, any cancellation proceedings started for this reason can be dropped.
Who's exempt: TDS/TCS registrants and suo-moto registrations. A regular business supplying goods or services should assume it applies.
Rule 2: File Your Returns on Time
A GSTIN makes you liable to file returns regularly: typically GSTR-1 for outward supplies, GSTR-3B for summary and tax payment, plus an annual return where applicable. Keep the GST return due dates for 2026 handy, and if the process is new, this step-by-step GST filing guide walks through it.
Late filing has layers of cost:
Set your filing calendar from the day you register, not your first sale. Prolonged non-filing is serious, though GST registration can be restored even after a six-month default once returns are filed.
Rule 3: Keep Your Registration Verifiable
Why These Three Rules Matter Together
Bank details keep your registration active, timely returns protect your record and buyers' credits, and visibility keeps you credible. For the full picture, read GST Registered? Don't Stop at GSTIN.
Frequently Asked Questions (FAQ)
Q1. Can I get a GST number without a bank account?
A: Yes, but you must furnish bank details within the prescribed time limit.
Q2. What is the deadline for adding bank account details?
A: Within 30 days of registration or before your first GSTR-1 or Invoice Furnishing Facility use, whichever is earlier.
Q3. What happens if I don't add my bank details?
A: Your GST registration may be suspended until the details are furnished.
Q4. Do I have to file GST returns if I had no sales?
A: Yes. Nil returns are still required, and not filing them attracts late fees.
Q5. Where must I display my GST certificate?
A: At your principal place of business and every additional place of business, with the GSTIN on the name board at the entrance.
Q6. How can someone verify my GST registration?
A: Anyone can check your GSTIN on the GST portal, so keep your certificate, invoices, and name board consistent.
Treat Your GSTIN as a Starting Point
Three small habits in month one - bank details, a filing calendar, visible certificates - save trouble later.
Need help with bank details, return filing, or amendments? Explore Auditfiling's GST services.