Many businesses find themselves with a growing balance in their electronic credit ledger. This usually happens when the business exports goods or services without paying tax, or when it pays a higher GST rate on purchases than on its sales. The GST law allows you to claim this unutilised credit back as a cash refund.
The rule for ITC refunds
Under Section 54(3) of the CGST Act, a registered person may claim a refund of any unutilised input tax credit at the end of any tax period. This refund is strictly allowed only in two cases:
- Zero-rated supplies made without payment of tax.
- Inverted duty structure, where the credit has accumulated on account of the rate of tax on inputs being higher than the rate of tax on output supplies.
“a registered person may claim refund of any unutilised input tax credit at the end of any tax period: Provided that no refund of unutilised input tax credit shall be allowed in cases other than (i) zero rated supplies made without payment of tax; (ii) where the credit has accumulated on account of rate of tax on inputs being higher than the rate of tax on output supplies” Section 54(3), CGST Act
How to calculate the refund amount
For an inverted duty structure, the maximum refund amount is calculated using a specific formula provided in the CGST Rules. It looks at your turnover of inverted rated supplies, your net ITC, and your adjusted total turnover.
Worked example: inverted duty structure
Suppose you manufacture a product that attracts 5% GST, but your raw materials attract 18% GST. Over a month, your transactions look like this:
| Particulars | Amount |
|---|---|
| Value of inputs purchased | ₹1,00,000 |
| GST paid on inputs (18%) | ₹18,000 |
| Value of output supplies | ₹1,50,000 |
| GST payable on output (5%) | ₹7,500 |
| Unutilised ITC eligible for refund | ₹10,500 |
In this example, your net ITC is ₹18,000. You use ₹7,500 to pay your output tax liability. The remaining ₹10,500 accumulates in your credit ledger and can be claimed as a refund.
Steps to claim the refund
- Ensure all your input invoices appear in your GSTR-2B. You cannot claim a refund for ITC that is missing from GSTR-2B. Read our guide on Input Tax Credit conditions.
- File your GSTR-1 and GSTR-3B for the relevant tax period.
- Log in to the GST portal and navigate to Services > Refunds > Application for Refund. Follow the GST portal refund application steps.
- Select the correct refund type, such as "Refund of ITC on account of Inverted Duty Structure".
- Fill in form GST RFD-01, attach the required supporting documents, and submit using an EVC or DSC.
Common mistakes to avoid
A few common errors can lead to your refund claim being rejected or delayed.
- Missing GSTR-2B data: The portal will restrict your refund to the ITC available in your GSTR-2B. If your supplier has not filed their GSTR-1, you cannot claim the refund.
- Capital goods ITC: Under an inverted duty structure, you cannot claim a refund of ITC paid on capital goods or input services. The refund is limited to inputs (raw materials). Check our guide on blocked credits under Section 17(5).
- Time limits: You must file the refund application within the statutory time limit, which is generally two years from the relevant date.
Related guides
- GST refund of tax paid under wrong head: Section 77 and Section 19 correction guide
- GST refund of unutilized ITC on zero-rated supplies without payment of tax: LUT formula and Rule 89(4)
- Export of services without payment of tax: LUT ITC refund guide
Frequently asked questions
When can I claim a refund of unutilised ITC?
You can claim a refund of unutilised ITC in two cases: when making zero-rated supplies without payment of tax, or when your input tax rate is higher than your output tax rate (inverted duty structure).
Check your GSTR-2B before claiming a refund
Before you file for an ITC refund, you must ensure all your purchase invoices are present in GSTR-2B. gstr2bmatch.in is a free GSTR-2B reconciliation tool for Indian accountants, small CAs and SMB owners. It reads their GSTR-2B and purchase register in the browser and shows, with rupee figures, which invoices are missing, mismatched or stuck in IMS Pending. Your GSTR-2B and purchase register files are read in your browser and never uploaded to any server.
Match your GSTR-2BLast checked: 13 October 2026. Sources used: Section 54, CGST Act, GST Portal Refund Manual.