Input Tax Credit — How to Claim and What You Need to Know

Input Tax Credit forms the backbone of the GST system, eliminating the cascading effect of taxes that plagued the previous regime. Understanding ITC mechanics helps businesses optimize tax outflows while remaining compliant. ## What Is Input Tax Credit Input Tax Credit allows a registered person to reduce taxes paid on inputs (purchases) from taxes collected on outputs (sales). If you purchase goods for Rs 10,000 plus Rs 1,800 GST, you pay Rs 11,800 to the supplier but can claim Rs 1,800 as ITC when filing your returns. The basic formula is: Net GST Payable = GST Collected on Sales - ITC on Purchases. A business that collects Rs 50,000 GST on sales but paid Rs 35,000 GST on purchases would pay only Rs 15,000 to the government, not Rs 50,000. ## ITC Eligibility Rules You can claim ITC on inputs received, input services received, and capital goods used in your business. The inputs and services must be used for business purposes — they do not need to be exclusively used, but purely personal consumption is ineligible. The most critical ITC condition is that the supplier must have filed their GSTR-1, making the invoice visible in your GSTR-2B. ITC cannot be claimed on invoices that suppliers have not reported, even if you physically hold a valid tax invoice. ITC on inputs is not available if the final output supply is exempt from GST. A trader purchasing goods exclusively for resale of exempted agricultural produce cannot claim ITC. However, mixed-use inputs can claim ITC proportionately based on taxable usage. ## ITC Claiming Process ITC is claimed in GSTR-3B by reporting eligible input tax credit in the relevant tables. The GST portal auto-populates GSTR-2B with ITC-eligible invoices from suppliers' GSTR-1 filings, which you must reconcile with your purchase records. Match each supplier's invoice details — invoice number, date, value, and tax amount — with your records. If mismatches exist, ITC may be restricted until the supplier corrects their return. Monthly reconciliation with suppliers prevents ITC loss at year-end. ITC claimed must be reversed if inputs are used for exempt supplies or if goods are written off. The reversal is done in GSTR-3B with interest charged from the date of claim if not reversed within the specified time. ## Common ITC Mistakes Claiming ITC on invoices from unregistered suppliers is a common error. If a supplier is not registered under GST, they cannot charge GST, and any GST shown as paid to them is not creditable even if they issued a fake invoice. Another mistake is claiming ITC before receiving goods or before the supplier files their return. ITC eligibility requires actual receipt of goods or services and the corresponding invoice being reported by the supplier in their GSTR-1.