GSTR-1: Definition, Meaning & Guide for Indian Businesses

GSTR-1 is the monthly (or quarterly) return of all outward supplies (sales) that every GST-registered business must file.

What is GSTR-1?

GSTR-1 is the return where you declare all your outward supplies (sales) for the tax period. It includes invoices issued to B2B customers, B2C customers, exports, credit notes, debit notes, and amendments. Most businesses file GSTR-1 monthly by the 11th of the next month. Businesses with turnover up to ₹5 crore can opt for quarterly filing under QRMP. Your GSTR-1 data flows into your buyers' GSTR-2B, which they use to claim Input Tax Credit. If you do not file GSTR-1, your buyers cannot claim ITC, so they will pressure you to file promptly. Late filing attracts a penalty of ₹50/day (₹20/day for nil returns) capped at ₹5,000.