What is GST reconciliation?

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GST reconciliation is the process of matching a company's goods and services tax (GST) filings — the returns submitted to the tax authority — with the transaction data recorded in its ERP or accounting system. The goal is to ensure that what has been reported to the tax authority is consistent with the underlying financial records, and that input tax credits (ITCs) claimed are valid and supportable.

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In India, this means reconciling GSTR-1 (outward supply returns), GSTR-3B (monthly summary returns), and the GSTR-2A/2B (auto-populated inward supply data from suppliers) against internal records.

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Why it's complex

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GST reconciliation is challenging for several reasons. First, it involves two parties: a company's own filing and the data uploaded by its suppliers. If a supplier files late or incorrectly, the buyer's ITC claim is at risk. Second, transaction volumes are high — for a mid-to-large enterprise, thousands of GST transactions need to be reconciled monthly. Third, the matching rules are specific: amounts, GST numbers, invoice numbers, and dates must all align.

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Discrepancies between GSTR-2B and internal purchase records are one of the most common sources of tax exposure in India.

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What automation does

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Automated GST reconciliation platforms pull data from both the GSTN portal and the company's ERP, match records line by line, and flag discrepancies — mismatched amounts, invoices present on one side but not the other, invoices filed by the supplier in a later period. This replaces the manual export-and-VLOOKUP process that most finance teams still rely on.

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Related: Input Tax Credit Reconciliation · Vendor Reconciliation · ERP Reconciliation · Recon Automation