GST Input Tax Credit in 2026: Everything You Need to Know

Input Tax Credit (ITC) remains the single biggest lever for optimizing GST liability. Yet audit findings from the last four years show that 3 out of 5 SMEs either under-claim credits or claim ineligible ones. Both mistakes are expensive.

Who can claim ITC?

Section 16 of the CGST Act lays out the four conditions: possession of a tax invoice, receipt of goods/services, payment to supplier within 180 days, and the supplier having filed GSTR-1 correctly. If any one condition fails, the credit is reversible with interest.

Blocked credits under Section 17(5)

Even where the four conditions are met, certain expense categories are permanently blocked. The most-litigated blocks include motor vehicles, works contracts for immovable property, membership of clubs, and CSR expenditure. Judicial trends in 2025 have narrowed some of these — but reliance on tribunal orders without documentation remains risky.

Reconciliation discipline

The most common source of ITC leakage is the mismatch between purchase records and GSTR-2B. Businesses that reconcile monthly (not quarterly) reduce audit exposure by an estimated 80%. Automated tools now make this a 30-minute exercise per month.

Practical checklist

• Reconcile purchase register with GSTR-2B before the 20th of each month.
• Track supplier payments — 180-day rule triggers automatic reversal.
• Maintain e-way bill and delivery evidence for every high-value invoice.
• Segregate blocked credits at source, not at year-end.

If you'd like a written opinion on a specific ITC claim, raise a query and one of our senior GST partners will review your case within one business day.