GST input tax credit (ITC) can be unavailable because it is legally ineligible, or delayed because a condition has not yet been met or the invoice is missing or incorrect in GST Portal records. A GSTR-2B entry helps with reconciliation, but it does not by itself establish that a credit is claimable. Check the invoice, the supply and the applicable CGST Act conditions before relying on a portal status.
First, distinguish an ineligible credit from a delayed one
Section 16 of the Central Goods and Services Tax Act, 2017 (CGST Act) broadly permits a registered person to claim input tax on supplies used or intended for use in business, subject to conditions and restrictions. Among other requirements, the recipient must hold a prescribed tax document, receive the goods or services, satisfy the applicable tax-payment condition and furnish the section 39 return. Other provisions restrict credit, including for certain blocked-credit categories and for business or exempt-supply use.
A credit is not automatically lost just because it is absent from GSTR-2B or temporarily reversed. Conversely, a credit appearing in GSTR-2B is not automatically eligible. Identify the specific legal condition or reporting issue first: a correction or later fulfilment may resolve a delay or permit reclaim, while permanently ineligible credit cannot be reclaimed simply because the portal lists it.
Common reasons ITC is blocked or delayed
| Cause | What it generally means | Next step |
|---|---|---|
| Invoice omitted or reported incorrectly | Supplier reporting or invoice details do not match the recipient’s records; this may be a reporting delay, not a final eligibility decision. | Reconcile invoice details and ask the supplier to report or correct them through the applicable return process. |
| Goods or services not yet received | A statutory eligibility condition remains unmet, even if the invoice appears in GSTR-2B. | Keep receipt or service-acceptance evidence; claim or reclaim only when the condition is satisfied. |
| Supplier not paid within 180 days | For covered transactions, the unpaid proportion is subject to reversal and interest; later payment can allow re-availment under the applicable provisions. | Reconcile invoice balances and payment dates, then report any reversal or reclaim correctly. |
| GSTIN or place-of-supply mismatch | The invoice may be associated with the wrong registration or an incorrect place-of-supply treatment. | Verify the recipient GSTIN and the legally applicable place of supply before claiming. |
| Claim time limit may have expired | A late claim may be barred, although a reclaim of credit previously reversed can have different treatment. | Check the current statutory text, notifications and the reason for the credit before filing. |
| Blocked, apportioned or otherwise ineligible credit | The credit may be excluded or restricted under the Act, regardless of portal visibility. | Assess business use, exempt supplies and blocked-credit rules; reverse or exclude amounts where required. |
| Duplicate, amended or credit-note difference | A timing, amendment or accounting difference may look like a missing or excess credit. | Match amendments and credit/debit notes to the purchase ledger and prior claims. |
Supplier has not reported the invoice or has reported it incorrectly
Compare the supplier GSTIN, invoice number and date, taxable value, tax amounts and place of supply on the tax invoice with the purchase ledger and GSTR-2B. If the supplier omitted or misstated the invoice, request that it report or correct the details using the appropriate return process. Keep the correspondence and corrected invoice data. Do not assume a correction will appear in a particular month: timing depends on the applicable filing period and current portal workflow.
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GST Portal guidance describes GSTR-2B as a static, month-wise statement with invoice-level details that auto-populate parts of GSTR-3B. It is a reconciliation aid, not a complete legal ruling. The recipient remains responsible for self-assessing eligibility, including scenarios not generated by the system.
Goods or services have not yet been received
Receipt is a section 16 condition, so an invoice in GSTR-2B does not remove the need to establish that the supply was received. Keep delivery records, goods-receipt documentation, service acceptance or other contemporaneous evidence. For goods received in lots or instalments, the Act provides that entitlement follows receipt of the final lot or instalment. CBIC Circular 170/02/2022-GST treats credit reversed for non-receipt as potentially reclaimable after the condition is met, subject to the applicable rules and return reporting.
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The supplier remains unpaid beyond 180 days
For a covered transaction, if the recipient availed ITC but does not pay the supplier the value of the supply plus tax within 180 days from the invoice date, section 16 and Rule 37 require a proportionate reversal for the unpaid amount, with interest. A partial payment means the unpaid proportion needs attention. Once payment is made, the recipient may re-avail the credit under the applicable provisions. CBIC’s FAQ clarifies that this 180-day payment condition does not apply where tax is payable under reverse charge.
The registration or place of supply does not match
GST Portal guidance identifies an unavailable-credit case where the supplier GSTIN and place of supply are in the same state but the recipient is in a different state. This can point to an invoice addressed to the wrong registration or a place-of-supply issue. Check which recipient GSTIN is on the invoice, which registration received the supply and what place-of-supply treatment legally applies. A portal adjustment alone may not cure a substantive error.
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Section 16(4), as displayed on the cited CBIC-hosted Act page, ties the claim deadline to the due date for the September return following the relevant financial year or the relevant annual return, whichever is earlier. GSTR-2B can flag specified time-barred cases. Because statutory text and notifications can change, verify the current consolidated law for the invoice and financial year before treating this as the applicable deadline. Also distinguish a fresh late claim from a reclaim of credit reversed earlier: Rule 37(4) may treat an eligible reclaim differently.
The credit is blocked, apportioned or otherwise ineligible
Section 17 restricts credit attributable to non-business or exempt-supply use and includes blocked-credit provisions. Review how the purchase is used and whether a restriction applies; an amount listed in a portal statement may still need to be excluded or reversed. GSTR-2B does not identify every possible ineligible situation.
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Duplicate claims, credit notes, amendments or accounting differences
Check whether the invoice was already claimed, whether a credit or debit note or amendment changed its value, and whether tax heads or reporting periods differ between records. CBIC Circular 170/02/2022-GST says GSTR-2B information auto-populates Table 4 of GSTR-3B and that the fields are editable by the taxpayer. The recipient must identify ineligible credit and reversals to arrive at net ITC.
How to investigate and resolve a disputed or missing line
- Identify the exact item. Record the supplier GSTIN, invoice or debit-note number and date, tax period, tax heads and amount. Check for duplicate booking, credit notes or amendments.
- Reconcile the records. Match the tax document and purchase ledger against GSTR-2B, then compare the filed GSTR-3B and electronic credit ledger. Treat portal-populated data as a starting point for reconciliation, not a substitute for self-assessment.
- Test the legal conditions. Confirm business use, a valid document, receipt of the supply, applicable supplier tax reporting/payment conditions, the correct recipient registration and place of supply, the absence of a blocked-credit rule, and the applicable claim deadline.
- Assign the correction to the right party. Supplier reporting errors require supplier-side follow-up. Receipt, payment and business-use questions require the recipient’s records and legal assessment. If the issue is eligibility or a possible time bar, calculate its effect before filing rather than treating it as a clerical mismatch.
- Report reversals and reclaims in the appropriate fields. Under CBIC Circular 170/02/2022-GST, permanent reversals, including specified section 17(5) credit and Rules 42/43 amounts, are distinguished in Table 4(B)(1) from certain temporary reversals in Table 4(B)(2). The circular describes eligible reclaims through Table 4(A)(5), with reclaimed amounts also disclosed in Table 4(D)(1), and explains the net available credit calculation in Table 4(C). These are reporting instructions; confirm the current form instructions and statutory condition before reclaiming.
- Keep an audit trail. Retain the invoice, evidence of receipt, supplier correspondence, payment record, reconciliation, reversal or reclaim calculation and filed-return acknowledgement. For a disputed interpretation, a substantial amount, a notice or transactions involving multiple registrations, get advice from a qualified GST professional.
Keep reversal and reclaim separate from permanent ineligibility
A reversal is not always permanent. CBIC Circular 170/02/2022-GST identifies certain temporary reversals, including those relating to non-payment within 180 days, non-receipt and specified section 16(2)(b) or (c) conditions. Credit in those cases may be reclaimed only after the relevant condition is met and the return is reported correctly. By contrast, specified blocked credit and Rules 42/43 amounts are treated as permanent reversals in the circular’s reporting framework.
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The annual-return treatment also depends on the year and reason. GST Portal’s FY 2024-25 annual-return FAQ describes, for that year, a same-year claim, reversal and reclaim in separate tables: claim in Table 6B, reversal in the relevant Table 7 entry and reclaim in Table 6H. It gives distinct treatment for Rule 37/37A reclaims versus other reclaims across financial years. Check the FAQ and return instructions for the relevant year rather than applying those table labels universally.
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What to verify before filing
- Use the current consolidated CGST Act and Rules, relevant notifications and current GST Portal instructions for the return period in question. The cited CBIC Act page and consolidated Rules PDF may not reflect every later change.
- Do not treat the 180-day condition, a portal status or a GSTR-2B amount as an empirical measure of typical delay or recovery; the cited official material establishes no average resolution time or prevalence rate.
- Apply the rules to the particular invoice, financial year, registration and return version. General guidance cannot determine eligibility for an individual GSTIN or notice.
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