There are several legitimate situations where a GST-registered business ends up with more credit or cash paid than it actually owes — and the law provides a structured, largely online refund process to get that money back. This guide covers the common refund scenarios, how to file, and what timelines apply.

Common Refund Scenarios

•      Export of goods/services or supply to SEZ (zero-rated supply) under LUT, resulting in accumulated unutilised ITC

•      Export of goods/services on payment of IGST, resulting in a claim for refund of the IGST actually paid

•      Inverted duty structure — where the tax rate on inputs is higher than the tax rate on the output supply, causing ITC to structurally pile up over time

•      Excess balance lying in the electronic cash ledger, where more tax was deposited than actually became due

•      Refund of tax paid on deemed exports (by either the supplier or the recipient, as notified)

•      Refund arising from finalisation of a provisional assessment, resulting in excess tax having been paid

•      Refund arising from an appellate authority, tribunal, or court order in the taxpayer's favour

•      Refund for tax paid on a supply that is later found not to have taken place, or is cancelled/deficient

How to File a Refund Claim

Refund claims are filed online in Form GST RFD-01 on the GST portal, along with the required supporting documents (invoices, shipping bills, LUT, bank realisation certificates, CA certificate for certain claim categories, etc.) and a category-specific statement of relevant invoices.

An Application Reference Number (ARN) is generated immediately upon submission for tracking the claim's progress.

For zero-rated supplies specifically, 90% of the claimed refund amount is often granted provisionally within 7 days of acknowledgment of the complete application, with the balance 10% settled after detailed scrutiny by the officer.

The proper officer is legally required to process a refund claim within 60 days of receipt of a complete application; failing which, interest at 6% per annum becomes automatically payable to the taxpayer on the delayed refund amount (9% per annum where the refund arises from an appellate/court order).

Common Reasons for Refund Rejection or Delay

•      Mismatch between the refund claim amount and figures reflected in GSTR-1/GSTR-3B for the relevant period

•      Missing or inconsistent linkage between invoices, shipping bills, and FIRC/BRC documentation

•      Claims filed for a category where the taxpayer doesn't actually qualify (e.g., claiming inverted duty structure refund when the rate difference doesn't genuinely exist for the relevant inputs)

•      Incomplete or improperly certified documentation, particularly for high-value claims requiring a Chartered Accountant's certificate

Time Limit for Filing

A refund application must generally be filed within 2 years from the 'relevant date', which varies by the specific refund scenario — for example, the date of export for export-related refunds, the date of payment of tax for excess payment cases, or the date of communication of the appellate/court order for order-driven refunds.

Frequently Asked Questions

Q1. What exactly is an 'inverted duty structure' refund?

A. It's a refund available when the GST rate on your inputs is higher than the GST rate on your output supply, which naturally causes ITC to build up faster than it can be used against your output tax liability, based on a prescribed refund formula.

Q2. How long do I have to file a refund claim?

A. Generally 2 years from the 'relevant date' applicable to that specific type of refund claim — this date differs depending on whether the claim relates to exports, excess payment, an appellate order, or another category.

Q3. Is the refund process fully automatic?

A. No — while provisional refunds (like 90% for zero-rated supplies) can be quick, the full claim goes through scrutiny by a GST officer, who may seek clarifications or additional documents before sanctioning the final amount.

Q4. What happens if my refund isn't processed within 60 days?

A. Interest at 6% per annum (9% per annum for court/appellate-order-driven refunds) becomes automatically payable to you by the government on the delayed refund amount, from the date immediately after the 60-day period until the refund is actually granted.

Q5. Can I claim a refund of excess balance sitting in my electronic cash ledger?

A. Yes, if you've deposited more tax in your cash ledger than you actually needed to pay, you can claim a refund of that unutilised excess balance through Form RFD-01.

Q6. Do I need a Chartered Accountant's certificate for every refund claim?

A. Not for every claim — it's generally required for refund claims exceeding a prescribed monetary threshold, as a certification that the incidence of tax has not been passed on to another person (to prevent 'unjust enrichment').