Your supplier didn't file GSTR-1: what it costs you and how to get the credit back

Your purchase invoice is correct, the goods arrived, you paid the bill. But the supplier has not reported the invoice in their GSTR-1, so it does not appear in your GSTR-2B. Under today's rules that is enough to stop you claiming the input tax credit. Here is what it costs, which deadlines matter, and how to get the credit back.

Why a supplier's filing decides your credit

Since 1 January 2022, Section 16(2)(aa) of the CGST Act and Rule 36(4) allow input tax credit only on invoices that the supplier has furnished in GSTR-1 and that appear in your GSTR-2B. The monthly rhythm for regular taxpayers is:

• 11th: the supplier's GSTR-1 for the previous month is due.
• 14th: your GSTR-2B for that month is generated from what suppliers filed.
• 20th: your GSTR-3B is due, and you can only claim what 2B shows.

If an invoice misses that window, the credit waits for a later 2B, and only if the supplier eventually files.

Three clocks that turn "late" into "lost"

Section 16(4). Credit for a financial year can be claimed only until 30 November of the following year, or the date you file the annual return if that is earlier. An invoice that turns up in 2B after that date is a permanent loss.

Rule 37A. If a supplier has filed GSTR-1 but not paid the tax through GSTR-3B by 30 September of the following year, the credit you already took must be reversed in a return filed by 30 November. You can reclaim it once the supplier files.

180 days. Under the second proviso to Section 16(2) and Rule 37, if you do not pay the supplier within 180 days of the invoice date, the credit is reversed and added to your output tax, with interest. You reclaim it when you pay.

Separately, Section 43B(h) of the Income Tax Act requires payments to micro and small suppliers within 15 days, or 45 days if agreed in writing, for the expense to be deductible that year. That limits how long you can simply hold their payment as leverage.

Matching is the easy part

TallyPrime, BUSY and Zoho Books all produce a GSTR-2B reconciliation that lists the invoices missing from 2B. The Invoice Management System on the GST portal, live since October 2024, lets you accept, reject or keep pending each invoice. So most finance teams already know which invoices are missing.

What goes wrong is the next step. Someone has to contact each supplier, keep track of who promised what, decide what credit to hold in this month's 3B, and remember to reverse or reclaim it on time. With forty suppliers that work spreads across WhatsApp, email and phone calls, and it slips every month.

A chase that works

The firms that recover most of their credit do four things consistently:

1. Start the day 2B arrives. Send each supplier's accounts contact the exact invoice numbers, dates and amounts, and ask them to file in GSTR-1. A specific list gets action; "please check your filings" does not.
2. Follow up the next day by email, with the same list and a request for the ARN or filing date.
3. Escalate before your 3B is due. Write to the supplier's owner, copy your own owner, and say plainly that the credit will be held.
4. Carry pending invoices forward and chase them every month until they appear in a later 2B or the supplier confirms they will never file.

Close an item only when the invoice appears in 2B or the supplier shares an ARN. Keep every message and reply with its date: if a GST notice ever asks why credit was claimed or reversed, that record is your evidence.

Doing it without adding staff

We built CredHold to run exactly this chase. You upload TallyPrime's 2B reconciliation report (or an Excel purchase register with the 2B JSON), and it messages each supplier on WhatsApp and email in your company's name. Suppliers reply from their phone without logging in. When next month's 2B shows the invoice, CredHold closes the item, updates the held-credit ledger and prepares the GSTR-3B Table 4 summary. CA firms use it across all their client GSTINs from one screen.

Whether you use a tool or a spreadsheet, the principle is the same: the credit comes back when someone follows up, every month, for every supplier.

This article explains the general rules as of November 2026. It is not tax advice. Check the position for your business with your chartered accountant.