Complete Guide to Letter of Undertaking (LUT) Under GST: Export Without Tax Painlessly
Navigating international trade requires precision, compliance, and smart financial management. For Indian exporters scaling their cross-border operations, cash flow is everything. Imagine paying Integrated Goods and Services Tax (IGST) upfront on every shipment overseas, only to navigate a labyrinthine bureaucratic queue to claim your refunds months later. This is precisely where the Letter of Undertaking (LUT) under GST becomes your business’s ultimate financial shield.
At CleverCoins, we specialize in transforming intricate tax frameworks into seamless strategic advantages. In this exhaustive guide, we dissect every single element of the GST LUT—from eligibility criteria and legal mandates to step-by-step filing procedures on the GST portal, compliance tracking, and common pitfalls to avoid.
1. What is a Letter of Undertaking (LUT) Under GST?
Under the Goods and Services Tax (GST) regime in India, any export of goods or services is legally classified as “zero-rated supply.” This means the government does not intend to export taxes across international borders. However, to ensure compliance and track transactions, the default legislative stance requires exporters to follow one of two paths:
Export under Bond with Bank Guarantee: Pay IGST upfront or execute a formal bond backed by a legal bank guarantee.
Export under Letter of Undertaking (LUT): Export goods or services without paying IGST by furnishing a formal, self-declaration bond known as an LUT.
Why is LUT Crucial?
The Letter of Undertaking is essentially a formal promise given by a registered taxable person to the government stating that they will fulfill all requirements specified under the GST law regarding exports within stipulated timelines. By filing an LUT on Form GST RFD-11, exporters save massive amounts of working capital that would otherwise remain stuck in government coffers awaiting refund clearances.
2. Legal Framework & Provisions Governing LUT
The provisions governing LUT are anchored under Section 16 of the Integrated Goods and Services Tax (IGST) Act, 2017, read alongside Rule 96A of the Central Goods and Services Tax (CGST) Rules, 2017.
Rule 96A Mandates:
Any registered person exporting goods or services without paying IGST must furnish an LUT in Form GST RFD-11 before making the export.
The undertaking binds the exporter to pay the due tax along with applicable interest if they fail to:
Export the goods within three months from the date of issue of the export invoice.
Receive payment for exported services within one year from the date of the issue of the invoice (or within such extended period as allowed by the Reserve Bank of India – RBI).
3. Who is Eligible to File an LUT Under GST?
Thanks to progressive amendments via various notifications (such as Notification No. 37/2017-Central Tax), the facility of filing an LUT has been extended to virtually all registered taxpayers who intend to export goods or services.
Key Exceptions (Who Cannot File LUT?):
The only major exception is if a taxpayer or its proprietors/partners/directors have been prosecuted under the CGST Act, the IGST Act, or any existing indirect tax law for an offense where the tax evaded exceeds ₹250 Lakhs (2.5 Crores INR). In such punitive scenarios, the taxpayer is barred from using an LUT and must export under a physical bond backed by a bank guarantee.
4. Validity and Renewal of GST LUT
Financial Year Validity: An LUT filed under GST is valid for the entire financial year in which it is submitted.
Annual Renewal Requirement: Exporters must remember that an LUT is not a one-time lifetime document. A fresh LUT must be filed for every new financial year (typically before April 30th of that financial year) to ensure continuous zero-rated exports without interruption. Failing to renew means subsequent invoices raised without IGST could attract compliance notices.
5. Documents and Prerequisites Required for Filing LUT
Before logging into the GST portal to generate your LUT, ensure you have the following ready:
Active GSTIN: Valid registration with proper credentials.
Authorized Signatory Details: DSC (Digital Signature Certificate) of the Director, Managing Partner, Proprietor, or Authorized Signatory. For companies and LLPs, a DSC is mandatory.
Witness Details: Details, names, and addresses of two independent witnesses who will sign the undertaking.
Form GST RFD-11: Duly filled application structure.
Previous Year LUT Reference: If applicable, keep track of your previous ARN (Application Reference Number).
6. Step-by-Step Procedure to File LUT on the GST Portal
Filing an LUT online is completely paperless and straightforward if executed systematically. Follow these steps:
Step 1: Login to the GST Portal
Navigate to the official GST Portal and log in using your valid username, password, and captcha code.
Step 2: Navigate to User Services
Go to the top menu bar.
Click on Services -> User Services -> Furnish Letter of Undertaking (LUT).
Step 3: Select Financial Year
From the drop-down menu labeled “Financial Year for which LUT is being filed,” select the target financial year (e.g., 2026-2027).
Note: If you already uploaded an LUT for a previous year, select the appropriate active year.
Step 4: Fill Out Form GST RFD-11
The online form will load. Review the pre-filled taxpayer details and complete the declarations:
Condition (a): Undertaking that exports will be made within the time specified in Rule 96A.
Condition (b): Agreement to pay IGST along with 18% interest if export conditions are violated.
Condition (c): Declaration that the applicant has not been prosecuted for offenses involving tax evasion exceeding ₹2.5 Crores.
Step 5: Enter Witness Information
Provide the names, occupations, and addresses of two independent witnesses who endorse the undertaking.
Step 6: Sign and Submit
Choose the filing mode: SIGN WITH DSC (Digital Signature Certificate – mandatory for LLPs and Companies) or SIGN WITH EVC (Electronic Verification Code via OTP sent to the registered mobile/email of the primary authorized signatory).
Click SUBMIT.
Step 7: Save the ARN
Once successfully submitted, a unique Acknowledgment Reference Number (ARN) is generated, and a confirmation message is sent via SMS and email. You can download the signed LUT copy instantly from your Services -> User Services -> My Applications section.
7. Essential Compliance Checklist Post-LUT Generation
Obtaining an LUT is only half the battle. Maintaining clean records keeps your tax profile healthy and immune to audits. Adhere to these golden rules:
Invoicing Precision: Every export invoice must explicitly state: “SUPPLY MEANT FOR EXPORT ON LUT WITHOUT PAYMENT OF INTEGRATED TAX (IGST)”.
Track Realization Timelines: Ensure foreign inward remittances (FIRC / Bank Realization Certificates) are meticulously tracked against your invoices within the 1-year window.
Filing GSTR-1 and GSTR-3B: Accurately report all zero-rated supplies under Table 6A of GSTR-1, matching them seamlessly with your shipping bills.
8. Common Mistakes Exporters Make with LUTs
Missing the Deadline: Forgetting to file the new LUT before April 1 and raising invoices without tax compliance in the new financial year.
Wrong Jurisdiction or Signatory Errors: Using an invalid DSC or authorizing a person without proper board/partner resolution backing.
Failure to Link Shipping Bills: Mismatch between invoice details declared on the GST portal and custom electronic data interchange (ICEGATE) systems.
9. How CleverCoins Protects and Optimizes Your Export Compliance
At CleverCoins, we understand that modern businesses want to focus on global expansion, not wrestling with tax portals and regulatory compliance. Our specialized indirect tax team manages your annual GST filings, timely LUT renewals, real-time invoice matching, and litigation defenses so your working capital stays fluid and secure.
Ready to streamline your global trade compliance? Consult with the CleverCoins experts today and let us turn your tax code complexity into your strongest competitive edge!
- Phone: +91 77389 59862
- Email: client@clevercoins.org
- Address: Ideal Market, Mumbra, Thane-400612
