Your Client Rejected Your Invoice on the GST Portal. Here's What Actually Changes.

Your client's accounts person emails: "We've rejected your invoice on IMS, please check."

Here's the short version before anything else:

• If they rejected an invoice, your GST does not go down. You reported it and you still owe it. What your client loses is the input tax credit (ITC) on it, until the record is fixed.
• If they rejected a credit note, your GST goes back up. The reduction you took is added back in your next GSTR-3B.

Neither is a penalty or a notice. Both are fixable, usually in one return. The rest of this post is how.

Not tax advice. This explains how the portal behaves so you can go to your CA with the right question. Verify timelines for your filing frequency before acting.

What IMS is, in two sentences

The Invoice Management System is a screen on the GST portal where your client sees every invoice, debit note and credit note you've reported against their GSTIN. They mark each one Accept, Reject or Pending, and that decides whether they get the ITC on it.

If they do nothing, the invoice is treated as accepted by default. So a rejection is a deliberate click. Someone looked at your invoice and thought something was wrong.

This only applies to Indian, GST-registered clients. Export invoices to foreign clients don't carry a GSTIN and never show up in anyone's IMS.

Why clients reject freelancer invoices

In practice, it's rarely a dispute about the work. It's usually one of these:

• Wrong GSTIN. You used an old GSTIN, a typo, or the GSTIN of a different branch or group company.
• Name they don't recognise. Your invoice shows a trade name or your personal name, their records show something else.
• Amount doesn't match their books. They booked ₹1,00,000 against a PO, your invoice says ₹1,18,000 with GST included, or the other way round.
• Wrong month. The invoice date doesn't match when they recorded the expense. See what happens when a client asks you to backdate.
• Duplicate. You re-issued an invoice with a new number and reported both.
• A credit note they didn't expect. More on this below. It's the one that costs you money.

Ask which it is before you change anything. The fix is different for each.

Where to see it yourself

You don't have to wait for the email. On the GST portal, open IMS → Outward Supplies. This is the supplier view: every B2B invoice you reported, with the action your client took on it.

Since February 2026 there is also a separate Rejected Records tab under Outward Supplies. It lists rejected credit notes and similar records where your tax has been, or will be, added back. If you issue credit notes at all, check this tab each month before filing.

Case 1: They rejected an invoice that was correct

Your GST liability doesn't change. You've done nothing wrong. But your client has no ITC on it, so they'll keep chasing you, and it's worth fixing quickly.

If they haven't filed their GSTR-3B for that month yet: they can change Reject to Accept themselves. Nothing for you to do except confirm the invoice is right.

If they've already filed their GSTR-3B: their action for that month is locked. The fix is on your side:

1. 1.Report the same invoice, unchanged, again. Either in GSTR-1A for the same period, or in the amendment table of your next GSTR-1 (or IFF, if you file quarterly).
2. 2.It reappears in their IMS. They accept it.
3. 3.They get their ITC in that later period.

Because the re-reported invoice is identical to the original, the difference is zero. You don't pay any extra tax for re-reporting it.

Case 2: They rejected an invoice that was wrong

This is where the rejection is doing its job. Fix the actual error through your returns, not by sending a fresh invoice.

• Wrong GSTIN, or a B2B invoice that went in as B2C: amend the invoice details in GSTR-1A or the next GSTR-1 amendment table.
• Amount too high: issue a credit note for the difference.
• Amount too low: issue a debit note for the difference.

What you can still change on an invoice you already sent walks through each one.

Don't do this: cancel it in your head and send a brand-new invoice with a new number for the same work. The original is still in your GSTR-1. You'll now have two invoices reported, and you'll pay GST twice until someone notices.

Case 3: They rejected your credit note

This is the one that actually costs you.

Say you invoiced ₹2,00,000 + GST in January, the client cut the scope, and you agreed on ₹1,50,000. You issue a credit note for ₹50,000 + ₹9,000 GST. That ₹9,000 should come off your GST payable.

Since October 2025, it only comes off if your client accepts the credit note in IMS. Accepting it means they reverse ₹9,000 of their own ITC. Some clients don't want to do that, some reject it by mistake, and some don't recognise it.

If they reject it, the portal adds the ₹9,000 back to your liability in your next GSTR-3B. You're back where you started: GST paid on money you'll never receive.

What to do:

1. 1.Tell them before you issue it. A credit note that arrives without warning gets rejected. One line to the accounts team — "credit note CN-004 for ₹59,000 against INV-021, for the agreed scope change" — prevents most of this.
2. 2.If it's rejected by mistake, report the same credit note again in GSTR-1A or your next GSTR-1 amendment table and ask them to accept it this time. Once accepted, your reduction goes through again, and the net effect is as if it was accepted the first time.
3. 3.If they never claimed the ITC in the first place (common with small clients), they don't have anything to reverse. They should still accept the credit note, not reject it. Point their accountant to this.
4. 4.If they genuinely dispute it, that's a commercial conversation, not a portal one. Until it's settled, the GST stays on your side.

Clients can also keep a credit note Pending, but only for one return period (one quarter if they file quarterly). After that it's treated as accepted.

Why this matters right now

Credit notes for invoices from April 2025 to March 2026 must be reported by 30 November 2026, and for quarterly filers the practical cut-off is the July–September return in late October. If a FY 2025-26 credit note is rejected and the window closes before it's re-reported and accepted, the GST stays paid for good.

The 30 November deadline post covers the full cleanup list. If you're issuing credit notes for last year, do it this week, not in November.

If you file quarterly

Most solo freelancers do. The rules are the same, with two differences:

• Your first two months' B2B invoices reach clients through the IFF. Rejections show up the same way in your Outward Supplies view.
• Your fixes land in your next quarterly return or IFF, so a rejection in July may not be corrected until October. Check the supplier view monthly anyway, so you're not discovering three months of rejections at once.

The 5-minute monthly check

1. 1.Open IMS → Outward Supplies. Filter for Rejected.
2. 2.Open the Rejected Records tab. Anything there has increased your GST.
3. 3.For each rejection, ask the client why before you change anything.
4. 4.Correct invoice → re-report unchanged. Wrong invoice → amend, credit note, or debit note.
5. 5.Before issuing any credit note, message the client's accounts person first.

Fewer rejections start with the invoice

Most rejections trace back to three fields: the client's GSTIN, the name on the invoice, and the amount split between taxable value and GST.

Mavoin keeps each client's details on their record, so you're not retyping a GSTIN every month, and shows the taxable value and CGST/SGST or IGST separately on every invoice. ₹199/month after the trial.

Start a 30-day trial — no card needed. Or check a single invoice first with the free GST invoice generator, which validates the GSTIN format before you send anything.

Sources: Section 34, CGST Act 2017 (CBIC) · GSTN advisory on inadvertently rejected records in IMS (19 June 2025) · Notification 18/2025-Central Tax (Rule 67B) · GSTN advisory on the Rejected Records tab (18 February 2026)

Mavoin is not a Chartered Accountant service. General information, current as of September 2026. Verify GST specifics with your CA.