IFF due date
Invoice Furnishing Facility. An optional upload of your B2B invoices in the first two months of a quarter, so your business buyers can claim their credit without waiting for your quarterly GSTR-1.
When it is due
The 13th of February, March, May, June, August, September, November and December
For the month before. For: GST, quarterly (QRMP).
Next dates
- Fri, 13 Nov, 2026October 2026 · GST, quarterly (QRMP)
- Sun, 13 Dec, 2026November 2026 · GST, quarterly (QRMP)
Everything due this month, for every kind of business →
Who files it
QRMP taxpayers who sell to other GST-registered businesses. Optional.
Questions people ask
- What is the due date for IFF?
- GST, quarterly (QRMP): the 13th of February, March, May, June, August, September, November and December, for the month before. These are the statutory dates; the government sometimes extends one by notification.
- What is IFF?
- An optional upload of your B2B invoices in the first two months of a quarter, so your business buyers can claim their credit without waiting for your quarterly GSTR-1.
- Who has to file IFF?
- QRMP taxpayers who sell to other GST-registered businesses. Optional.
Statutory due dates, checked on 23 September 2026 against the GST portal. When the government extends a deadline by notification, the extension is not shown here until we add it.
Only your dates, on your phone
Tell the filing calendar how your business files, and it lists every date that applies to you, IFFincluded, ready to add to your phone's calendar with a reminder. Free, no account.