Basic difference
The Purchase Register is maintained in the taxpayer's accounting system and represents purchases recorded in the books. GSTR-2B is an auto-drafted GST statement generated from information furnished through the GST system. Because they come from different sources, differences are normal and should be investigated systematically.
Why do they differ?
Common reasons include supplier non-filing or late filing, wrong GSTIN, incorrect invoice number, invoice-date differences, amendments, credit or debit notes, accounting omissions, duplicate entries and period differences.
Common reconciliation categories
Matched invoices correspond under the selected matching rules. Partial or value mismatches require review. Purchase Register-only records indicate documents in books without a corresponding record in the selected GSTR-2B. GSTR-2B-only records indicate documents available in GST data but not found in the selected books.
How to reduce recurring differences
Maintain supplier master data carefully, validate GSTINs, use consistent invoice-number conventions, reconcile every tax period, monitor supplier filing behaviour and maintain a documented exception tracker.
Use the reconciliation tool
The GST Reconciliation Tool can compare Purchase Register and GSTR-2B data and classify results into Matched, Partial Matching, Not in 2B and Not in PR, with an Excel report for further review.
Use the Free GST Reconciliation Tool
Reconcile Purchase Register vs GSTR-2B, review matched and unmatched invoices and download an Excel reconciliation report.
Open GST Reconciliation Tool →Frequently Asked Questions
What is GST reconciliation?
It is the comparison of accounting records with GST data to identify matched and exception transactions.
Why reconcile Purchase Register with GSTR-2B?
It helps identify missing invoices, mismatches, duplicate records and other differences before final ITC review.
Can GSTR-2B reconciliation be done in Excel?
Yes. Excel is commonly used, although large datasets and non-identical invoice numbers can make manual matching difficult.
Does a matched invoice automatically mean ITC is eligible?
No. Matching is a data-review result. Applicable GST law and transaction-specific eligibility conditions still need to be considered.