Input Tax Credit (ITC) Explained in Simple Words

Input tax credit (ITC) is the GST you have already paid on your business purchases, which you can subtract from the GST you collect on your sales. It avoids tax on tax and is the heart of how GST works.

Worked example

You are a trader at 18% GST.

• You buy goods for ₹1,00,000 and pay ₹18,000 GST. This is your input tax.
• You sell the goods for ₹1,30,000 and collect ₹23,400 GST. This is your output tax.
• You pay: 23,400 − 18,000 = ₹5,400, which is 18% of your ₹30,000 margin.

Conditions to claim ITC

• You are registered under the regular GST scheme (not composition).
• You hold a valid tax invoice from your supplier.
• You actually received the goods or services.
• Your supplier has filed their return and the invoice appears in your GSTR-2B statement.
• The purchase is for business use. Some items are blocked, for example certain motor vehicles, food and beverages and personal use items.
• You claim it within the time limit.

Why correct invoices matter

If a supplier's invoice has a wrong GSTIN, missing HSN or an incorrect tax amount, your credit can be denied. As a supplier, a correct invoice helps your customer claim ITC, which makes them happier to buy from you. See GST invoice mandatory fields and GST invoice format.

Tips

1. Always ask suppliers for a GST invoice with your GSTIN printed correctly.
2. Match purchases with GSTR-2B every month.
3. Keep invoices for the period required by law.
4. Pay suppliers within the time limit prescribed, otherwise credit may need to be reversed.

Learn the basics in what is GST and calculate amounts with the GST calculator.

ITC rules are detailed and change often. This is a general overview and not tax advice. Confirm with a qualified CA.