Common Reasons Input Tax Credit Gets Rejected
Claiming Input Tax Credit feels straightforward — pay GST on a purchase, claim it back against what you owe. In practice, a surprising share of claimed ITC ends up disputed or reversed. Most of the common causes trace back to one of a handful of patterns.
Supplier non-compliance
This is the single biggest cause, and the one buyers have the least direct control over. If your supplier didn't file their GSTR-1, or filed it late, or didn't actually deposit the tax they collected from you, the credit won't reflect properly in your GSTR-2B — and claiming it anyway based only on the invoice you hold is a common source of later reversal with interest.
Invoice-GSTR-2B mismatches
Even when a supplier does file, small discrepancies — a different invoice number format, a mismatched value, or a wrong GSTIN keyed in by the supplier — can cause the entry in GSTR-2B not to match your own purchase records, creating a reconciliation gap that's worth chasing down before you claim it.
Claiming past the time limit
ITC for a financial year generally cannot be claimed after a specific cut-off tied to the annual return filing deadline for that year. Purchases from early in a financial year that only get reconciled and claimed much later risk running past this window — a good reason to reconcile ITC monthly rather than saving it for year-end.
Blocked credit categories
Some purchases are simply excluded from ITC eligibility regardless of how clean the paperwork is — covered in more depth in our guide chapter on ITC. Claiming credit on a blocked category is one of the more avoidable mistakes, since it's a known list rather than a judgment call.
Goods/services not actually received
ITC requires that the goods or services were genuinely received — claiming credit based on an invoice for something not yet delivered (common with advance billing arrangements) is a frequent, often unintentional, timing error.
Key takeaways
- Supplier non-filing is the leading cause of ITC trouble, and it's largely outside the buyer's direct control — vet suppliers' filing consistency where you can.
- Monthly reconciliation against GSTR-2B catches most mismatches before they compound.
- ITC has a hard time limit each financial year — don't let claims pile up unclaimed.