GST Input Tax Credit Reconciliation

Overview

Input tax credit (ITC) lets a business set the GST it paid on purchases against the GST it collects on sales. The credit is allowed only if the supplier has reported your invoice and the conditions of Section 16 are met. ITC reconciliation is the exercise of matching your purchase records and credit claims with what the GST portal shows (GSTR-2B and, for older analysis, GSTR-2A), so that you claim what you are entitled to and nothing more.

Who needs it

• Regular taxpayers with a meaningful number of purchases from many suppliers.
• Businesses that received a notice about an ITC mismatch or an excess claim.
• Companies preparing the annual return and the GSTR-9C reconciliation statement.
• Businesses whose auditors or lenders ask for a credit reconciliation.
• Exporters and manufacturers with large credit balances or pending refunds.

What Zenith does

Zenith listens first: which periods you want covered, what accounting software you use and whether a notice or a refund is behind the request. We give a tailored quotation and assign a relationship manager. The team imports your purchase register, matches it to GSTR-2B by supplier GSTIN, invoice number, date, taxable value and tax, and sorts the output into matched, missing in the portal, missing in books, and mismatched in value or tax. We explain the likely reason for each group, prepare supplier follow-up lists, show eligible and ineligible credit, reconcile with the credit claimed in GSTR-3B and give you a summary with recommended actions: claim, reverse, defer or chase the supplier. Zenith does not prepare notice replies or appeals under this service (see GST Notice Reply).

Eligibility and key rules

• Conditions to claim credit include being registered, using the goods or services for business, holding a valid tax invoice or similar document, receiving the goods or services, the supplier having paid the tax to the government, and the supplier having filed the return that reports the invoice.
• GSTR-2B is a static monthly statement of credit available, generated on the 14th of the following month. It replaced the dynamic GSTR-2A as the basis for claiming credit from August 2020.
• GSTR-2B is not filed; it is used to claim credit in GSTR-3B.
• Credit for an invoice has a time limit: it must be claimed by the earlier of the due date of the September return after the financial year or the date of the annual return.
• Some credit is blocked or reversible by law (certain personal-use items, for example), and credit on a supplier credit note must be reversed.
• The Invoice Management System on the portal lets a recipient accept, reject or keep invoices pending before they flow into GSTR-2B.
• Interest applies on credit taken wrongly and used.

Documents required

• Purchase register in Excel or from your accounting software for the period.
• GSTR-2B (and GSTR-2A where useful) downloaded from the portal, or authorisation for Zenith to download them.
• Filed GSTR-3B for the period.
• Supplier invoices, debit and credit notes, bills of entry for imports.
• Reverse charge and ISD documents.
• Earlier reconciliations and any notices received.

Process and timeline

1. Fix the periods (month, quarter or full year) and the data format.
2. Zenith downloads the portal statements and loads your purchase data.
3. Matching runs by GSTIN, document number, date, taxable value and tax heads.
4. The team investigates mismatches: timing, rounding, wrong GSTIN, amendments, credit notes.
5. You receive the report with supplier-wise follow-up and a proposed adjustment.
6. After your approval, corrections are made in books and in upcoming GSTR-3B returns.

Timelines depend on completeness, complexity and authority processing, and also on how quickly suppliers correct their filings.

Government fees, penalties and due dates

• Government fee: nil for downloading and reconciling statements.
• Last date to claim credit for a financial year: the earlier of the due date of the September GSTR-3B of the next year and the date of the annual return.
• Interest on excess credit claimed and used: payable from the date of claim; public sources quote different rates, so the exact rate and period are confirmed in your quotation.
• Excess credit found later may also lead to a demand with penalty in a notice. Professional fees are customised; government fees are shown separately in the quotation.
• Amounts and dates above reflect public sources read in October 2026 and change with notifications, so Zenith confirms the current figures in your quotation.

Common mistakes

• Matching only totals and not invoice by invoice.
• Claiming credit before the supplier has uploaded the invoice.
• Ignoring supplier credit notes and not reversing the corresponding credit.
• Missing the time limit for the previous year's invoices.
• Comparing with GSTR-2A when the claim is based on GSTR-2B.
• Treating a typo in a GSTIN or invoice number as a missing invoice.
• Not chasing the supplier in time for their next GSTR-1.

FAQs