Input Tax Credit (ITC): How It Works

Input Tax Credit is the mechanism that stops GST from cascading (tax being charged on tax) as goods and services move through a supply chain. A registered business that pays GST on its purchases — raw materials, business services, equipment — can claim that GST as a credit against the GST it collects on its own sales, paying only the net difference to the government.

Conditions to claim ITC

Claiming ITC isn't automatic — several conditions need to be satisfied together:

• The business must hold a valid tax invoice or debit note from the supplier.
• The goods or services must actually have been received.
• The supplier must have actually paid the tax to the government and filed their own return reflecting the supply — this is why a buyer's ITC can be affected by a supplier's non-compliance, reconciled via GSTR-2B.
• The claiming business must have filed its own return for the period.

What ITC cannot be claimed on

A specific "blocked credit" list excludes ITC on certain categories even if GST was validly paid — common examples include motor vehicles for personal use (with some exceptions for specific business uses), food and beverages (unless the business itself is in that line), club memberships, and works contract services for constructing an immovable property (again with some exceptions). The exact blocked list is detailed and worth checking against your specific purchase before assuming a claim is valid.

Reversal of ITC

ITC already claimed sometimes has to be reversed — for example, if the input is later used for an exempt supply, for personal use, or if the supplier's invoice is later found not to have been paid to the government within the prescribed time. Reversed ITC is added back to output tax liability, typically with interest.

Key takeaways

• ITC lets a business net off GST paid on purchases against GST owed on sales.
• Valid ITC depends on the supplier's compliance, not just your own invoice.
• A specific blocked-credit list excludes some categories of purchase regardless of invoice validity.