Input Tax Credit

Input Tax Credit (ITC) is the cornerstone of the Indian GST system. It allows a GST-registered business to deduct the GST paid on its purchases (inputs) from the GST it collects on its sales (outputs). The net difference is what the business pays to the government. This mechanism ensures that GST is effectively a tax on value addition only — not on the entire transaction value at every stage of the supply chain.

ITC is governed by Sections 16 to 21 of the CGST Act, 2017.

How ITC Works — A Simple Example

A manufacturer buys raw materials worth ₹1,00,000 and pays 18% GST (₹18,000) on the purchase. They then sell the finished product for ₹1,50,000 and collect 18% GST (₹27,000) from the buyer.

Without ITC, the manufacturer would pay ₹27,000 in GST. With ITC, they offset the ₹18,000 already paid on inputs and pay only ₹9,000 (₹27,000 − ₹18,000) to the government. The buyer in turn uses the ₹27,000 as ITC against their own GST liability.

Conditions for Claiming ITC

A registered taxpayer can claim ITC only if all of the following conditions under Section 16(2) are met:

1. The taxpayer holds a valid tax invoice or debit note from a GST-registered supplier.

2. The goods or services have been received by the taxpayer.

3. The supplier has paid the GST charged on the invoice to the government and filed their GSTR-1.

4. The invoice or debit note is reflected in the taxpayer's GSTR-2B.

5. The taxpayer has filed their own GSTR-3B for the relevant period.

6. Payment is made to the supplier within 180 days of the invoice date. If not, the ITC claimed must be reversed and interest paid.

Ineligible ITC — What Cannot Be Claimed

Not all GST paid qualifies for ITC. Section 17(5) of the CGST Act lists specific items where ITC is blocked:

• Motor vehicles (except when used for transportation of passengers, goods, or driving training)
• Food, beverages, outdoor catering, and club memberships
• Health and life insurance (unless mandated by law for employees)
• Works contract services for immovable property (construction)
• Goods or services for personal consumption
• Goods lost, stolen, destroyed, or written off as bad debt

ITC Utilisation Order

ITC is maintained in three separate electronic ledgers — for IGST, CGST, and SGST. The order of utilisation is:

IGST ITC is used first against IGST liability, then CGST, then SGST.

CGST ITC is used first against CGST liability, then IGST. It cannot be used for SGST.

SGST ITC is used first against SGST liability, then IGST. It cannot be used for CGST.

ITC and Zero-Rated Supplies

Businesses making zero-rated supplies (exports or SEZ supplies) accumulate ITC since they pay GST on inputs but charge 0% on outputs. This accumulated ITC can be claimed as a GST refund — making ITC recovery one of the key financial benefits of exporting from India.

ITC Reversal

ITC must be reversed (added back to tax liability) in the following situations:

• Supplier payment not made within 180 days of invoice date
• Goods or services used for exempt or non-business purposes (proportionate reversal under Rule 42/43)
• Goods lost, destroyed, or written off
• Capital goods disposed of before their useful life is complete
• ITC availed in excess of what is available in GSTR-2B (after reconciliation)

ITC Reconciliation

One of the most important monthly tasks for a GST-registered business is reconciling ITC claimed in GSTR-3B against the ITC available in GSTR-2B. Any mismatch can lead to notices from the GST department, demand for reversal, and interest.

ITC for Composition Scheme Taxpayers

Taxpayers registered under the Composition Scheme are not eligible to claim ITC. This is one of the key trade-offs of opting into the composition scheme — lower compliance burden in exchange for no ITC benefit.

ITC on Job Work

Under Section 19 of the CGST Act, a principal who sends goods for job work can claim ITC on those goods, even while they are in the job worker's premises — provided the conditions under Section 143 are met and goods are returned within the prescribed time limits.

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