How to Claim Input Tax Credit (ITC) Under GST

To understand how to claim input tax credit, the short version is this: hold a valid tax invoice, make sure the purchase shows up in your auto-drafted GSTR-2B, then offset that GST against your output tax when you file GSTR-3B. Input tax credit (ITC) — the GST you have already paid on purchases — only flows through if the invoice, your records and your supplier's filing all match.

The conditions you must satisfy before claiming ITC

Before you claim a single rupee, check that the purchase clears every condition. Skip one and the credit can be denied later with interest:

• Valid document: a tax invoice or debit note from a GST-registered supplier, with their GSTIN, your GSTIN, HSN/SAC and the tax break-up.
• Goods or services received: you have actually got what you paid for.
• Supplier has reported it: the invoice appears in your GSTR-2B, which means the supplier filed it and (broadly) paid the tax.
• You file your return: ITC is claimed by reporting it in your own GSTR-3B.
• Payment to supplier: you pay the supplier within the prescribed period, or the credit may need reversal.

For an industry-specific view, our piece on input tax credit for startups walks through exactly what an early-stage company can and cannot claim.

Step-by-step: how to claim ITC (matching with GSTR-2B)

GSTR-2B is your monthly, static statement of eligible ITC, generated from what your suppliers reported. Treat it as the single source of truth. Here is the workflow:

1. Collect all purchase invoices for the month and record each one with supplier GSTIN, invoice number, taxable value and GST (CGST/SGST or IGST).
2. Download your GSTR-2B from the GST portal for that return period.
3. Reconcile your purchase register against GSTR-2B. Match invoice number, GSTIN and tax amount line by line.
4. List the mismatches. Invoices in your books but missing from GSTR-2B mean the supplier has not filed — chase them. Invoices in GSTR-2B you do not recognise need checking before you claim.
5. Claim only the matched, eligible credit in Table 4 of GSTR-3B. Exclude blocked credits and anything not yet in GSTR-2B.
6. Offset ITC against output tax in the correct order (IGST first, then CGST and SGST) and pay any remaining liability in cash.
7. File GSTR-3B and save your reconciliation working as proof.

Do this every month without fail. Once a return is filed, fixing a missed credit is harder and time-bound.

What is the time limit to claim ITC?

There is a hard deadline. As of 2026, ITC for invoices of a financial year must generally be claimed by a cut-off tied to filing the return for a specified month of the following financial year (commonly read as on or before 30 November, or filing of the annual return, whichever is earlier). Miss it and the credit is lost permanently.

Because this date and its exact wording can change by notification, do not rely on memory. Confirm the current limit for your year on gst.gov.in or with your CA before you assume a credit is still claimable.

When must ITC be reversed?

Sometimes you claim ITC correctly but later have to give it back. Common triggers include:

• Non-payment to supplier within the prescribed period from the invoice date.
• Exempt or personal use: inputs used for exempt supplies or non-business purposes need proportionate reversal.
• Credit notes: when a supplier issues a credit note, your corresponding ITC reduces.
• Goods lost, stolen, destroyed or written off, and free samples.

Reversals usually carry interest, so it is far cheaper to claim carefully than to over-claim and reverse later.

Common mistakes that block your ITC

Most denied credits come from a handful of avoidable errors:

• Claiming before the invoice hits GSTR-2B — if the supplier has not filed, your claim is unsupported.
• Wrong GSTIN on the invoice — a single digit off and the credit will not match.
• Claiming blocked credits like staff catering, personal-use vehicles or gifts.
• No reconciliation — relying on book entries instead of matching to GSTR-2B.
• Missing the time limit for an earlier year's invoices.
• Mixing personal and business spends on the same card without splitting the GST.

To raise compliant documents that your own customers can claim against, see our GST invoice format guide.

This article sits inside our broader GST guide for small businesses. Invodo keeps a clean purchase register, matches every bill to GSTR-2B and shows your claimable credit before you file — so nothing slips past the deadline. Create your free Invodo account and claim input tax credit with confidence.