How to Claim Input Tax Credit (ITC) in GST — Step by Step Guide 2026

What is ITC?

Input Tax Credit lets a registered business reduce the GST it owes on sales by the GST it already paid on purchases used for the business. Without ITC, GST would compound at every stage of the supply chain; with it, tax is effectively charged only on the value added at each step.

Who can claim ITC?

Any GST-registered business can claim ITC on goods or services used “in the course or furtherance of business” — provided the supplier has actually paid that tax to the government and filed their own return correctly. Composition scheme taxpayers cannot claim ITC.

Conditions for claiming ITC

• You hold a valid tax invoice or debit note.
• You have actually received the goods or services.
• The supplier has filed their GSTR-1/IFF and the tax has reached the government.
• You have filed your own GST return.
• Payment to the supplier is made within 180 days of the invoice date.

GSTR-2B and ITC matching

GSTR-2B is an auto-generated statement showing the ITC available to you based on what your suppliers have reported in their GSTR-1. Since 2022, ITC claims are largely restricted to what shows up in GSTR-2B — so reconciling your purchase records against GSTR-2B every month, before filing GSTR-3B, is the single most important habit for not losing credit you're entitled to.

Common ITC mistakes

• Claiming credit on invoices the supplier hasn't yet reported in GSTR-1.
• Missing the 180-day payment-to-supplier window and not reversing the credit.
• Claiming ITC on blocked categories (see below) by mistake.
• Not reconciling GSTR-2B monthly, letting mismatches pile up unnoticed.

Blocked credits under Section 17(5)

Some categories are explicitly blocked regardless of business use — most notably motor vehicles for personal use, food and beverages, club memberships, and works contracts for immovable property (with limited exceptions). Claiming ITC on these is a common audit trigger.

How GSTClear helps with ITC reconciliation

ITC reconciliation against GSTR-2B is on GSTClear's roadmap as part of the Professional plan. Today, GSTClear focuses on keeping your own outward invoices clean and deadline-tracked, which is half the battle — accurate invoicing on your end means your customers can claim their ITC against you without friction too.