Guide to GST Refunds on Exports: With Payment vs. LUT Routes

India's GST regime treats exports as "Zero-Rated Supplies." This means the government wants exporters to be globally competitive by ensuring that no domestic taxes are exported along with goods or services.

To achieve this, the Goods and Services Tax (GST) system offers two distinct pathways for exporters to recover their taxes. Choosing the wrong pathway can lead to a liquidity crunch, where your money is trapped in the portal for months during a high-growth phase.

This guide provides a comprehensive comparison between the "With Payment of IGST" route and the "LUT" route to help you optimize your export cash flow.

Understanding the Two Export Routes

Section 16 of the IGST Act defines how you can execute zero-rated supplies:

Route 1: Export with Payment of IGST

In this route, you charge and pay 18% (or the relevant rate) IGST on your export invoice. You pay this tax using your existing Input Tax Credit (ITC) balance. If the ITC is insufficient, you pay the balance in cash.

• The Payoff: You then apply for a refund of this IGST.
• Best For: Businesses with surplus ITC who want to convert it into cash quickly.

Route 2: Export under Letter of Undertaking (LUT)

In this route, you do not pay any tax on the export invoice. You file a Letter of Undertaking (LUT) at the start of the year, which serves as a bond.

• The Payoff: Because you did not pay any tax on the sale, your ITC keeps accumulating in your ledger. You then apply for a refund of this accumulated ITC using a statutory formula.
• Best For: Startups, service providers, and businesses with low margins who want to avoid any upfront tax payment.

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Omission of Rule 96(10) Restrictions (57th GST Council Relief)

Previously, exporters who imported raw materials under duty-exemption schemes—such as Advance Authorization (AA), Export Oriented Units (EOU), or EPCG—were strictly barred by Rule 96(10) from choosing the "With Payment of IGST" route.

• The Omission: CBIC issued Notification No. 20/2024-Central Tax omitting Rule 96(10) without a saving clause.
• Retrospective Clarification: Following landmark rulings in Addwrap Packaging and Goodluck India, the 57th GST Council officially recommended making the omission of Rule 96(10) retrospective effective from October 23, 2017.
• Impact for Exporters: Exporters importing under duty exemptions can now freely utilize the "With Payment of IGST" route without fear of retrospective recovery demands. For full case law analysis, see our CGST Rule 96(10) Export Refund Litigation Tracker.

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Comparison Table: Which Route is Right for You?

How the Refund Process Works

For Goods (With Payment Route)

This is the fastest route for refunds. You do not need to file a separate refund application form.

1. Mention the Shipping Bill number and port code in your GSTR-1.
2. Pay the integrated tax liability in your GSTR-3B.
3. The GST portal transmits invoice data to the Customs portal (ICEGATE).
4. ICEGATE automatically validates the transmission and credits your bank account, often within 15 to 30 days.

For Services (Any Route) or Goods (LUT Route)

This requires a manual application via Form GST RFD-01.

1. File Form GST RFD-01 within 2 years from the "Relevant Date" (date of shipment or receipt of foreign inward remittance).
2. Upload a Statement of Invoices and a Foreign Inward Remittance Certificate (FIRC) or Bank Realization Certificate (BRC) as proof of foreign currency receipt.
3. Shortened Timeline (57th GST Council): Form GST RFD-02 (Acknowledgment) must be issued within 10 days (down from 15 days), failing which a deemed acknowledgment is generated automatically. 90% provisional refunds are auto-sanctioned within 3 working days based on risk assessment.

Legal Reference

Relevant Law: Section 16 of the IGST Act, 2017 defines Zero-Rated Supplies. Section 54 of the CGST Act, 2017 governs the refund mechanism. Rule 89 of the CGST Rules, 2017 provides the formula for refunding accumulated ITC on LUT exports. Rule 96 governs automatic IGST refunds on goods exports.

The Refund Formula for LUT Exports (Rule 89)

If you choose the LUT route, the government applies the standard proportionate formula:

Refund Amount = (Turnover of Zero-Rated Supply / Adjusted Total Turnover) * Net ITC

Common Pitfalls to Avoid

1. Missing the BRC for Services: For goods, a shipping bill is proof of export. For services, an export is only complete when the foreign currency arrives in India. If you do not receive payment in an RBI-recognized bank account within 1 year, your zero-rated status lapses and tax becomes payable with interest under Section 50.
2. Data Mismatches in Shipping Bills: Changing the invoice number, date, or GSTIN between the GST portal and the ICEGATE shipping bill will block automatic IGST disbursement.
3. Attempting to Claim ITC on Capital Goods under LUT: Under Rule 89, you can only claim a refund of ITC on Inputs and Input Services. You cannot claim a refund of ITC paid on Capital Goods. To monetize credit on capital goods, exporting on payment of IGST is significantly more advantageous.

Conclusion

Maximizing export cash flow requires matching your operational model with the optimal GST refund mechanism. Manufacturers importing raw materials under Advance Authorization or holding substantial capital equipment credits should leverage the "With Payment of IGST" route following the retrospective omission of Rule 96(10). Software exporters and service providers should adopt the LUT pathway to eliminate upfront liquidity demands.