GST Invoice Management System (IMS): Complete Guide for Taxpayers in 2026
Quick Summary
- The Invoice Management System (IMS) is a GST portal feature that allows recipient taxpayers to review inward supply records before they affect GSTR-2B and ITC reporting in GSTR-3B.
- IMS works as a control panel for inward invoices and related records. A taxpayer can generally accept, reject, or keep a record pending, depending on the document type. If no action is taken, the record is usually treated as deemed accepted at the time of GSTR-2B generation.
- A taxpayer can also take action after draft GSTR-2B is generated on the 14th and until the corresponding GSTR-3B is filed. In such cases, GSTR-2B must be recomputed.
- From the October 2025 tax period onward, IMS also added important changes, including pending for additional document categories, an optional field to declare the amount of ITC to be reversed in certain cases, and a separate Import of Goods section for Bills of Entry.
- IMS is an important GST compliance tool, but it does not by itself make ITC legally eligible. Section 16 conditions still apply, and taxpayers must claim only valid ITC.
What Is the Invoice Management System (IMS) Under GST?
The Invoice Management System is a feature on the GST portal that allows recipient taxpayers to review invoices and related inward records reported by suppliers, and then take action on those records before their ITC impact is carried forward to GSTR-2B.
Before IMS, businesses largely had to reconcile after supplier reporting had already flowed into their inward data statements. In practice, that meant many taxpayers noticed errors late, after the inward tax position had already become visible in GSTR-2B. IMS changes that approach by inserting a recipient-side review layer into the process.
Instead of being a passive viewer of inward records, the recipient gets a structured way to act on records that are wrong, disputed, duplicated, mistimed, or otherwise problematic.
This matters because GST compliance is not only about whether the supplier uploaded something. It is also about whether the recipient is actually entitled to the credit. A record may exist in the system and still not be fit for an ITC claim because the goods were not received, the tax type was wrong, the invoice belongs to another GSTIN, or the credit is blocked under the law. IMS gives the recipient a more disciplined way to handle those situations before they distort the working ITC position.
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Legal and Regulatory Position of IMS
IMS is operational on the GST portal and works through GSTN advisories, FAQs, and the GSTR-2B framework. The GST Council also recommended amendments to Section 38 of the CGST Act and Rule 60 of the CGST Rules for GSTR-2B generation based on IMS actions.
From a taxpayer’s point of view, IMS is live, it affects draft GSTR-2B, and it already influences how inward tax credit is managed. The legal framework around it has also evolved as the system has matured.
Who Is Covered Under IMS?
IMS is relevant mainly to taxpayers who claim input tax credit . In practical terms, that means most normal registered businesses purchasing goods or services from suppliers under GST.
IMS is important for regular taxpayers, but action on records in IMS is not a separate, stand-alone filing obligation. If the recipient takes no action, the system treats the record as accepted and generates GSTR-2B accordingly. That means the pressure to use IMS is practical and risk-based.
For QRMP taxpayers , IMS still matters, but the timing of GSTR-2B generation differs because their GSTR-2B is quarterly rather than monthly. Records saved or filed through IFF by a QRMP taxpayer can still flow to IMS for the recipient.
Composition taxpayers generally do not use IMS in the same way, as they do not avail of normal ITC. The core logic of IMS is tied to recipient-side ITC management, so it is most useful where ITC is part of the compliance workflow.
How IMS Works: Step by Step
The working flow of IMS becomes easier to understand when split into the supplier stage, the recipient stage, and the GSTR-2B stage.
Supplier Stage
When the supplier reports or saves outward supply records in GSTR-1 , IFF, or GSTR-1A, those records become available in the recipient’s IMS dashboard for action. However, for the actual computation of ITC in GSTR-2B, only filed records are considered.
In other words, saved records can appear in IMS for visibility and action, but the filed status still matters for GSTR-2B generation.
Recipient Stage
The recipient views the available records in IMS and decides what to do with them. Depending on the record type and the applicable rule, the recipient may be able to accept, reject, or keep the record pending.
If the record requires no adverse action and is valid for ITC consideration, it may be accepted. If it clearly does not pertain to the recipient or is wrong to such an extent that ordinary adjustment cannot sensibly fix it, it may be rejected. If the issue is temporary or requires verification, pending may be more appropriate, subject to the document-specific rules.
GSTR-2B Stage
At the time of generating the draft GSTR-2B , the system considers the current action status of each record.
Accepted records are included in the ITC Available section. Rejected records move to the ITC Rejected section and do not auto-populate in GSTR-3B as eligible ITC . Pending records are not included in GSTR-2B for that period. If no action is taken, the system generally treats the record as deemed accepted.
This is the key operational value of IMS. The recipient’s review directly influences how the draft GSTR-2B is prepared.
How to Access and Use IMS on the GST Portal
IMS is available within the GST portal returns framework, and inward records become visible there for recipient action. Once logged in, the taxpayer can review the available inward records and act accordingly based on the current tax period and the record category.
In practical terms, the best workflow is not merely to open IMS and click actions one by one. A serious business should first compare the portal data with its purchase register, goods receipt records, vendor ledger , and internal approval trail. The IMS decision should come after that comparison, not before it. That is because the legal issue is not whether the invoice exists in the portal. The legal issue is whether the taxpayer is entitled to the credit in the relevant period.
For businesses with large volumes of invoices, doing this entirely on the portal can be inefficient. Software integration can materially reduce manual effort by helping businesses download IMS data and reconcile it with their books.
Businesses with high invoice volumes can use BUSY's GST billing software to download IMS dashboard data and reconcile it directly against their purchase register and vendor ledger, significantly reducing the manual effort in the accept, reject, and pending review workflow each period.
The Three Actions in IMS: Accept, Reject, and Pending
Accept
Accepted records become part of the ITC Available section of GSTR-2B, and GST on accepted records auto-populates in GSTR-3B as eligible ITC. That is the system effect. But the legal claim still depends on actual ITC eligibility . A record can be accepted in IMS and still require caution if the goods were not received, the credit is blocked, or another legal condition is not met.
Use accept where the invoice genuinely belongs to your business, the supply has actually been received to the extent required by law, the tax appears correct, and there is no deeper dispute that should delay the credit decision.
Reject
Rejected records become part of the ITC Rejected section of GSTR-2B and do not auto-populate in GSTR-3B as eligible ITC.
Rejection should be handled carefully, as it results in no ITC for the recipient. It is best used when the record is fundamentally wrong from the recipient’s point of view, such as an incorrect GSTIN, duplicate reporting, or a document belonging to another buyer.
Reject is not the default response for every mismatch. It is more appropriate where the invoice is so wrong that normal correction methods cannot properly solve the issue from the recipient’s side.
Pending
Pending records do not become part of GSTR-2B and GSTR-3B for that period. Under the original framework, such records remained on the IMS dashboard until further action, but the use of "pending" was restricted for certain document types.
From a practical perspective, pending is useful where the issue is temporary rather than final. Examples include awaiting physical receipt of goods, checking quantity disputes, confirming commercial approval, or waiting for supplier clarification.
Before Oct 2025: Pending mostly used for standard B2B Invoices and Debit Notes ; explicitly blocked for Credit Notes.
After Oct 2025: Expanded to include Credit Notes , Downward Invoice/Debit Note Amendments, and ECO Documents, provided the original records were processed
Deemed Acceptance: The Rule Every Taxpayer Must Understand
Deemed acceptance is one of the most important operational rules in IMS. If no action is taken on a record in IMS, it is treated as deemed accepted at the time of GSTR-2B generation.
This rule matters because it prevents IMS from becoming a compliance bottleneck for every taxpayer who misses an action. But it also creates risk. A no-action position is not a neutral position. In system terms, it is closer to acceptance than to silence.
That means a business cannot safely say, “We did not approve it, so it should not affect us.” In many cases, doing nothing results in the record being routed to the inward credit logic anyway. The business must then decide whether the credit is actually valid and whether any reversal or correction is needed.
Deemed acceptance only means the system treated the record as accepted for GSTR-2B logic. It does not mean the law has certified the ITC as unquestionably valid. If the record later turns out to be ineligible, wrongly timed, blocked, or unrelated, the taxpayer may still need to reverse the credit or avoid claiming it in the first place.
How IMS Affects GSTR-2B Generation
IMS directly affects how draft GSTR-2B is built. At the time of GSTR-2B generation, only the filed invoices and records of the supplier are considered for the computation of ITC. On that basis, a draft GSTR-2B is made available on the 14th of the subsequent month.
Accepted records form part of the ITC Available section, rejected records move to ITC Rejected, and pending records stay out of GSTR-2B for that period.
The 14th is not the end of the process. A recipient can still take action after the generation of draft GSTR-2B and before filing the corresponding GSTR-3B. In that situation, the taxpayer must recompute GSTR-2B. No action can be taken after filing GSTR-3B for the same month.
A more accurate understanding is this:
- The 14th is the date on which the draft GSTR-2B is generated
- The taxpayer can still act after that
- If action is taken after that, recomputation is required
- Once the corresponding GSTR-3B is filed, the action window for that period closes
IMS vs. GSTR-2A vs. GSTR-2B
These three are related, but they are not the same thing.
| Aspect | IMS | GSTR-2A | GSTR-2B |
|---|---|---|---|
| Nature | Action-based dashboard | Dynamic reference statement | Static auto-drafted ITC statement |
| Main purpose | Lets recipient review and act on inward records | Shows supplier-reported inward supply data | Shows ITC position for a tax period |
| Recipient action possible | Yes - Accept, Reject, Pending | No | No |
| Update pattern | Updated as records become available for action | Updated continuously as suppliers upload or amend data | Generated for a specific period |
| Role in ITC | Helps determine how records are treated before GSTR-2B | Helps in reference and reconciliation | Used as the main basis for ITC reporting in GSTR-3B |
| Includes supplier-reported data | Yes | Yes | Yes |
| Includes recipient action status | Yes | No | Reflects IMS actions |
| Treatment of accepted records | Marked as accepted in IMS | Visible as reported data | Included in ITC Available section |
| Treatment of rejected records | Marked as rejected in IMS | May still appear as supplier-reported data | Moved to ITC Rejected section |
| Treatment of pending records | Remain pending for action | May still appear as supplier-reported data | Not included for that period |
| No action by recipient | Record is generally treated as deemed accepted | Not applicable | Reflected accordingly in the statement |
| Use in reconciliation | Helps verify and classify records before ITC use | Helps match supplier data with books | Helps finalise ITC claim for the period |
| Best use case | Pre-GSTR-2B review and control | Ongoing inward supply reference | Period-end ITC review and GSTR-3B preparation |
Credit Notes and Debit Notes in IMS
Credit notes and debit notes require careful treatment because their impact on ITC can differ significantly from that of ordinary invoices.
A credit note generally reduces the recipient’s eligible credit effect, while a debit note may increase the available credit effect if otherwise valid. However, the treatment of credit notes changed over time and needs to be understood in the current functional context.
Under the original framework, pending action was not allowed for certain credit note situations, and the earlier position was more restrictive.
Then, from the October 2025 tax period onward, IMS introduced expanded pending functionality for additional documents, including credit notes, upward amendment of credit notes, and some related amendment cases.
GSTN also addressed another practical problem. Earlier, the system could reverse the entire ITC amount in GSTR-2B upon acceptance of credit notes and similar records, even when the taxpayer had not fully availed the corresponding invoice credit or had already reversed part of it.
To address that, an option was introduced from the October 2025 tax period for the recipient taxpayer to declare the amount of ITC that actually needs to be reversed. This declaration is optional and especially relevant in partial-reversal situations.
This makes the treatment of credit notes and related adjustments more aligned with actual business and accounting situations.
New Changes in IMS from October 2025 Onward
Starting with the October 2025 tax period, several important changes became part of IMS.
- Pending was introduced for certain additional document categories that were not earlier eligible for pending. This includes credit notes, upward amendments of credit notes, and certain amendment cases where earlier rules were more restrictive.
- This expanded pending functionality is not endless. After the specified time period expires, if no action is taken, the system deems the record accepted. That means a pending record cannot remain unresolved forever.
- The recipient can also declare the amount of ITC that needs to be reversed for selected records. This was introduced because the earlier system could trigger full reversal even where the taxpayer had not availed the entire corresponding ITC or had already reversed part of it. The new declaration field is optional and is designed for cases where partial reversal is required..
Import of Goods Section in IMS
A separate Import of Goods section was introduced in IMS for Bills of Entry from the October 2025 period onward. This section includes Bills of Entry, including import from SEZ, for recipient action.
- The recipient taxpayer can either accept the Bill of Entry or keep it pending. If no action is taken, the Bill of Entry is treated as deemed accepted for system purposes. The action can also be changed even after generation of draft GSTR-2B till the filing of the corresponding GSTR-3B.
- Reject action is not allowed for Bills of Entry.
- For businesses with regular imports, this section becomes an important part of inward credit control and should be reviewed as part of the normal compliance workflow.
IMS and E-Invoicing: How They Connect
IMS and e-invoicing are related but not the same thing. Records reported in GSTR-1, IFF, and GSTR-1A can populate in the recipient’s IMS for action.
The better way to understand the connection is to focus on reporting flow and timing. E-invoicing may improve the speed and structure of data availability in the broader GST ecosystem, but IMS itself is fundamentally tied to the inward action logic for records reported through the GST return framework.
The practical takeaway is this: do not think in binaries such as “e-invoice supplier equals IMS” and “non-e-invoice supplier equals no IMS.” Instead, think in terms of when the inward record becomes available, whether it has been filed, and whether the recipient has acted on it.
IMS for QRMP Taxpayers
For QRMP taxpayers, records and invoices saved or filed through IFF can flow to IMS for the recipient and become part of GSTR-2B, depending on the recipient’s action.
GSTR-2B is generated monthly unless the recipient is a QRMP taxpayer. For a QRMP taxpayer, GSTR-2B is generated only quarterly. It is not generated for months M-1 and M-2 for a QRMP taxpayer.
That means QRMP taxpayers should not treat IMS as a once-in-a-quarter exercise that can safely be ignored till the quarter ends. Doing so creates a pile-up effect. By the time the quarter closes, the business may have too many unresolved inward records to review efficiently.
A better discipline is to review IMS periodically through the quarter, even if the formal GSTR-2B rhythm for the taxpayer is quarterly. That improves control, reduces surprises, and prevents quarter-end pressure.
What Happens If You Claim ITC on the Wrong Invoice
IMS reduces risk, but it does not eliminate the need for substantive tax judgment.
Suppose an invoice is accepted in IMS or deemed accepted because no action was taken. That does not automatically mean the taxpayer should claim the credit in GSTR-3B without further thought. If the goods were not received, the supply is not for business use, the credit is blocked, or the invoice does not genuinely belong to the taxpayer, the legal position may still require non-availment or reversal.
IMS helps decide what enters the system logic of GSTR-2B. It does not override the law governing eligibility of ITC.
That is why businesses need both system review and substantive review. A finance team that only checks whether a document appears in GSTR-2B can still make an incorrect claim. A team that uses IMS properly and checks underlying eligibility is much less likely to incur avoidable reversals.
Common IMS Errors and How to Handle Them
- Use of "rejection" too casually. Rejection should be used carefully because it results in no ITC for the recipient. It is more suitable when the record does not pertain to the recipient or is so wrong that standard correction methods cannot properly resolve the issue.
- Misunderstanding the role of the 14th. Many teams believe that if they miss the 13th or 14th, nothing can be changed. That is incorrect. Action can still be taken after draft GSTR-2B generation and before filing the corresponding GSTR-3B, subject to recomputation.
- Outdated understanding of pending. Businesses that learned the earlier rules sometimes still assume that credit notes cannot be kept pending. That is outdated for the post-October 2025 framework for eligible categories.
- Full ITC reversal on credit-note acceptance, where only partial reversal is warranted. The optional field for declaring the amount of ITC to be reversed is useful when the earlier system logic would have produced an excessive reversal.
- Businesses with imports that continue using a domestic-invoice-only understanding of IMS miss a significant part of the system, because Bills of Entry are now part of IMS from the October 2025 period onward.
Worked Scenarios with Amounts
Scenario 1: Straightforward Accept
ABC Traders receives a valid supplier invoice for taxable goods worth ₹1,00,000 plus GST of ₹18,000. The goods are received, the invoice matches the purchase order, the supplier details are correct, and there is no dispute. In this case, accepting the record in IMS is the natural step. The record moves into the ITC Available section of GSTR-2B, and the eligible ITC becomes part of the system’s GSTR-3B logic.
Scenario 2: Wrong GSTIN
XYZ Pvt Ltd finds an invoice in IMS that was never meant for its GSTIN. The value is ₹2,50,000 with GST of ₹45,000. Since the record does not pertain to the recipient, rejection is appropriate.
Scenario 3: No Action Taken
A recipient sees an inward invoice of ₹80,000 plus GST of ₹14,400 in IMS but takes no action before the generation of the draft GSTR-2 B. The record is treated as deemed accepted at that stage. If the taxpayer later realizes the record needs review but has not yet filed the corresponding GSTR-3B, action can still be taken, and GSTR-2B can be recomputed.
Scenario 4: Credit Note with Partial Reversal Need
A taxpayer had originally availed only part of the ITC on an invoice and later received a related credit note. Under the earlier system, accepting the credit note could trigger full reversal logic in GSTR-2B. From the October 2025 changes onward, the recipient can declare the amount of ITC that actually needs to be reversed in relevant cases. This produces a more accurate result where only partial reversal is needed.
Scenario 5: Bill of Entry in IMS
A manufacturing business imports components and the corresponding Bill of Entry appears in the Import of Goods section of IMS. The business can accept the Bill of Entry or keep it pending. Reject action is not available for Bills of Entry. If the business takes no action, the Bill of Entry is deemed accepted for system purposes.
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Conclusion
The Invoice Management System is now one of the most important control layers in GST compliance. It has changed the practical workflow of ITC management by giving recipients a structured way to review and act on inward records before those records shape the draft GSTR-2B result.
The biggest mistake a taxpayer can make is to treat IMS as a passive dashboard. It is not passive. If you act, your action affects how the inward credit picture is structured. If you do not act, the system may still treat the record as accepted. And if you rely only on system treatment without checking substantive eligibility, you can still land in the wrong ITC position.
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