GST Input Tax Credit
Input Tax Credit (ITC) under GST allows a registered business to set off the GST paid on purchases (inputs) against the GST collected on sales (output liability), thereby ensuring the tax effectively falls only on value addition.
Input Tax Credit is the mechanism that makes GST a value-added tax rather than a cascading tax. Without ITC, a manufacturer who pays GST on raw materials and then collects GST on finished goods would be taxed on the full value rather than just the margin — leading to tax-on-tax. ITC eliminates this by allowing the credit of input taxes against output liability.
To claim ITC, the recipient must: (1) possess a valid tax invoice or debit note from a GST-registered supplier; (2) have actually received the goods or services; (3) ensure the supplier has filed their GSTR-1 and that the invoice reflects in the recipient's GSTR-2B; and (4) file their own GST return. These conditions ensure a matched and verified ITC chain.
Certain ITC is blocked under Section 17(5), commonly known as blocked credits. Motor vehicles used for personal purposes, food and beverages, health services, club memberships, beauty treatment, works contract services for immovable property, and goods or services used for personal consumption are not eligible for ITC. Businesses often mistakenly claim ITC on these, leading to GST notices and demand orders.
For income-tax purposes, business expenses that include GST must be carefully handled. If ITC is available and claimed, only the base amount (excluding GST) is a deductible business expense. If ITC is not available (blocked credits or ineligible), the full amount including GST is deductible as a business expense under Section 37 of the Income Tax Act. Claiming both the full expense and the ITC is an error that tax auditors routinely check.
The GST portal reconciles ITC claims through GSTR-2B, an auto-populated statement. Mismatches between GSTR-2B and what the business has claimed in GSTR-3B (monthly return) attract scrutiny and can result in demands, interest at 18% per annum, and penalty. Since the introduction of Rule 36(4), ITC is restricted to what reflects in GSTR-2B, eliminating the earlier practice of provisional ITC.
For small businesses under the Composition Scheme, ITC is not available — they pay a fixed percentage of turnover as tax and cannot avail the credit mechanism.