Invoice Management System (IMS) Under GST: A Practical Workflow for Accepting, Rejecting, and Managing ITC
IMS puts every supplier-reported invoice on a single dashboard where recipients accept, reject, or leave it pending — directly shaping what lands in GSTR-2B. Here's how to build a monthly action workflow.
The Invoice Management System went live on the GST portal in October 2024 and has since become a mandatory checkpoint in the monthly ITC claim process. IMS surfaces every invoice a supplier has uploaded through GSTR-1 or IFF on a single recipient-facing dashboard, giving the recipient direct control over whether that invoice flows into their ITC-eligible GSTR-2B or not.
For each invoice, a recipient has three options: accept it, which routes it into the 'ITC Available' section of GSTR-2B; reject it, typically because the invoice details don't match the actual transaction, which routes it to an 'ITC Rejected' section and effectively flags the discrepancy back to the supplier; or leave it pending, deferring the decision to a later period without losing the credit. Critically, taking no action at all still results in the invoice being deemed accepted once GSTR-2B is generated — passive inaction is not a neutral choice.
This shifts the practical burden of GST reconciliation earlier in the cycle. Instead of discovering a mismatched invoice during GSTR-2B-to-purchase-register reconciliation after the fact, IMS gives recipients the opportunity to catch and reject an incorrect invoice before it ever becomes part of the ITC claim — provided someone is actually reviewing the IMS dashboard before the auto-accept default kicks in.
The operational risk with IMS is less about understanding the three actions and more about building the discipline to review the dashboard consistently, especially for businesses receiving invoices from a large number of suppliers. A monthly IMS review should happen before GSTR-2B is finalized for the period, not after, since acting on an invoice after GSTR-2B generation shifts the effect to a later return period rather than correcting the current one.
Firms handling IMS reviews across multiple client GSTINs benefit from treating it as a standing item in the monthly close checklist — reviewed alongside, not separately from, the broader GSTR-2B and purchase register reconciliation — so that accept/reject decisions and invoice-matching happen against the same, current dataset rather than at different points in the month.