GST Return Due Dates 2026 – When to File

GST returns have fixed due dates each month.

GSTR-1 (outward supplies): 11th of next month
GSTR-3B (summary return): 20th of next month
GSTR-9 (annual return): 31 December of next financial year

For example, January 2026 sales – file GSTR-1 by 11 Feb, GSTR-3B by 20 Feb. Late fees apply: ₹50/day (₹25 CGST + ₹25 SGST), max ₹5,000. Use a reminder or app to track dates.