The doctrine of unjust enrichment is a fundamental principle in GST refund jurisprudence. It prevents a taxpayer from claiming a refund if the burden of tax has already been passed on to the customer. This comprehensive guide explains the doctrine, its application, recent Supreme Court rulings, and how to avoid refund rejection.
What Is Unjust Enrichment?
Unjust enrichment occurs when a person retains a benefit (such as a tax refund) to which they are not entitled because the burden of that tax has already been passed on to another person.
In the context of GST refunds, the doctrine means that a taxpayer cannot claim a refund if the tax burden has been passed on to the customer. The refund, if any, must go to the Consumer Welfare Fund.
The Legal Position
The Hon'ble Supreme Court in the case of Sahakari Khand Udyog Mandal Ltd. v. Commissioner of Central Excise & Customs (2005) has defined unjust enrichment.
Recent Supreme Court Rulings
Union of India v. Torrent Power Ltd. (2026)
The Supreme Court held that refund cannot be granted when the tax burden has already been passed on to consumers.
In a significant ruling on the doctrine of unjust enrichment under GST, the Supreme Court of India held that refund of IGST paid on ocean freight must be credited to the Consumer Welfare Fund where the tax burden has been passed on.
Key Takeaway
Refund claims for ocean freight were denied under the doctrine of unjust enrichment.
When Does Unjust Enrichment Apply?
For Refund Claims
The doctrine applies to most GST refund claims, including:
- Refund of excess tax payment
- Refund of wrong tax payment
- Refund of accumulated ITC
- Refund on account of inverted duty structure
Exceptions
Unjust enrichment does not apply to:
- Exports (as the burden is not passed on to domestic consumers)
- Zero-rated supplies (in certain cases)
- Refund of pre-deposit (in certain cases)
How to Prove No Unjust Enrichment
Declaration
The applicant must provide a declaration to the effect that the incidence of tax, interest or any other amount claimed as refund has not been passed on to any other person.
CA Certificate
For claims exceeding ₹2 Lakhs, a Chartered Accountant's certificate is required to prove no unjust enrichment.
Evidence
The applicant must provide evidence that:
- The tax burden was not passed on to customers
- The price was not increased to cover the tax
- The refund is not being claimed at the expense of consumers
Consequences of Unjust Enrichment
Refund Rejection
If the tax burden has been passed on, the refund claim is rejected.
Transfer to Consumer Welfare Fund
If the refund is found to be unjustly enriched, the amount is transferred to the Consumer Welfare Fund.
Legal Consequences
The Supreme Court has held that the department is justified in denying refund on the ground that the claim is hit by the principle of unjust enrichment.
Common Mistakes to Avoid
Mistake 1: Not Providing Declaration The declaration that the burden has not been passed on is mandatory.
Mistake 2: Inadequate CA Certificate For claims above ₹2 Lakhs, a proper CA certificate is required.
Mistake 3: Passing On the Burden If the tax burden has been passed on, the refund is not available.
Mistake 4: Not Maintaining Records Records of pricing and tax incidence must be maintained.
Best Practices
Maintain Pricing Records: Keep records of how prices are determined and whether tax is passed on.
Provide Proper Declaration: Ensure the declaration is correctly provided.
Obtain CA Certificate: For claims above ₹2 Lakhs, obtain a proper CA certificate.
Seek Professional Guidance: Unjust enrichment rules have complexities; professional advice is recommended.
The doctrine of unjust enrichment is a critical consideration in GST refund claims. By understanding the doctrine, providing proper declarations, and maintaining records, businesses can avoid refund rejection.
Need help with unjust enrichment issues? Our GST experts provide comprehensive advisory and support.
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