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Overview

What is Letter of Undertaking (LUT)?

Letter of Undertaking (LUT) is a document furnished by exporters to the GST department undertaking to fulfill export obligations and comply with GST provisions, enabling them to export goods or services without paying Integrated GST (IGST). This facility significantly benefits exporters by eliminating the need to arrange funds for IGST payment and wait for refund processing, directly improving cash flow and working capital management.

Under Section 16 of IGST Act read with Rule 96A of CGST Rules, registered persons making zero-rated supplies (exports or supplies to SEZs) can either pay applicable IGST and claim refund later, or furnish LUT/bond and supply without paying tax. Most exporters prefer the LUT route as it prevents capital blockage. The LUT is an undertaking that the exporter will comply with provisions of the GST Acts, export the goods or services as declared, and fulfill all conditions and obligations prescribed for zero-rated supplies.

LUT filing is done electronically through the GST portal in Form GST RFD-11. Once filed, the LUT is auto-approved in most cases, becoming effective immediately for the financial year. The LUT remains valid throughout the financial year unless revoked or suspended. Exporters must file fresh LUT at the beginning of each financial year to continue exporting without tax payment. Multiple LUTs for different GSTINs (if operating in multiple states) must be filed separately for each registration.

Eligibility for LUT requires clean compliance history. Persons who have been prosecuted for any offense under GST or earlier indirect tax laws (Central Excise, Customs, Service Tax) or whose goods or conveyances have been detained or seized under these laws in the immediately preceding financial year are not eligible for LUT facility. They must furnish bond instead, which involves additional formalities and bank guarantees. For most compliant exporters, LUT filing is straightforward enabling seamless zero-rated exports without tax payment throughout the year.

What is Letter of Undertaking (LUT)?

Letter of Undertaking (LUT) is a document furnished by exporters to the GST department undertaking to fulfill export obligations and comply with GST provisions, enabling them to export goods or services without paying Integrated GST (IGST). This facility significantly benefits exporters by eliminating the need to arrange funds for IGST payment and wait for refund processing, directly improving cash flow and working capital management.

Under Section 16 of IGST Act read with Rule 96A of CGST Rules, registered persons making zero-rated supplies (exports or supplies to SEZs) can either pay applicable IGST and claim refund later, or furnish LUT/bond and supply without paying tax. Most exporters prefer the LUT route as it prevents capital blockage. The LUT is an undertaking that the exporter will comply with provisions of the GST Acts, export the goods or services as declared, and fulfill all conditions and obligations prescribed for zero-rated supplies.

LUT filing is done electronically through the GST portal in Form GST RFD-11. Once filed, the LUT is auto-approved in most cases, becoming effective immediately for the financial year. The LUT remains valid throughout the financial year unless revoked or suspended. Exporters must file fresh LUT at the beginning of each financial year to continue exporting without tax payment. Multiple LUTs for different GSTINs (if operating in multiple states) must be filed separately for each registration.

Eligibility for LUT requires clean compliance history. Persons who have been prosecuted for any offense under GST or earlier indirect tax laws (Central Excise, Customs, Service Tax) or whose goods or conveyances have been detained or seized under these laws in the immediately preceding financial year are not eligible for LUT facility. They must furnish bond instead, which involves additional formalities and bank guarantees. For most compliant exporters, LUT filing is straightforward enabling seamless zero-rated exports without tax payment throughout the year.

LUT Filing Process

Complete LUT Filing Procedure

Step 1: Eligibility Verification

Before filing LUT, eligibility must be verified. The exporter should not have been prosecuted for GST or earlier indirect tax offenses in the preceding financial year. No goods or conveyances should have been detained or seized under these laws in the preceding year. GST registration should be active and valid. If ineligible for LUT, the alternative is furnishing bond with bank guarantee or security deposit, which is more complex and costly. For first-time exporters or those unsure about eligibility, consulting the jurisdictional GST officer or professional advisors clarifies the position before filing.

Step 2: Document Preparation

The LUT filing requires minimal documentation but certain details must be ready. GSTIN of the exporter, name and address of the registered business, authorized signatory details who will sign the LUT, and estimated export turnover for the financial year. While no physical documents need uploading for LUT, having GST registration certificate, IEC (Import Export Code) certificate, and previous year’s export data ready is useful for reference. If you have multiple state registrations (multiple GSTINs), separate LUTs must be prepared for each GSTIN as LUT is GSTIN-specific, not PAN-specific.

Step 3: Online LUT Filing

LUT is filed online through the GST portal (www.gst.gov.in). Login with valid credentials, navigate to Services > Refund > Letter of Undertaking section. Select “Create Letter of Undertaking” option. Form GST RFD-11 opens for data entry. Fill in basic details including GSTIN, legal name, trade name (if any), and address which auto-populate from registration data. Enter estimated value of zero-rated supply (exports) for the financial year—this is an estimate, actual exports can vary. Select authorized signatory from dropdown (must be added as authorized signatory in GST registration). Verify all details carefully and submit using DSC (Digital Signature Certificate) or EVC (Electronic Verification Code) or Aadhaar-based authentication.

Step 4: LUT Acceptance & Activation

Upon submission, the LUT is auto-approved for most taxpayers through system validation. An acknowledgment is generated with Application Reference Number (ARN) and acceptance date. The accepted LUT can be downloaded in PDF format from the portal. This LUT remains valid for the entire financial year from the date of acceptance. In rare cases where system flags the taxpayer (due to compliance issues or adverse history), the LUT may be sent for manual verification to the jurisdictional officer. The officer may accept, seek clarifications, or reject with reasons. Once accepted, the exporter can immediately commence zero-rated supplies without paying IGST, quoting LUT reference number on export invoices.

Step 5: LUT Utilization & Compliance

With valid LUT, the exporter makes zero-rated supplies without paying IGST. Export invoices must mention “Supply meant for export under LUT without payment of tax” or similar declaration. While exporting, the shipping bill filed with customs should reference LUT. All export procedures—filing shipping bill, customs clearance, and export general manifest—are completed as usual, just without IGST payment. The exporter can claim refund of accumulated input tax credit used for export production through regular refund mechanism. Even though tax isn’t paid on exports, all other compliance obligations including GSTR-1 and GSTR-3B filing, proper record maintenance, and export documentation requirements remain fully applicable.

Step 6: Annual Renewal

LUT validity is limited to the financial year of filing. At the start of each new financial year, a fresh LUT must be filed to continue the benefit. The renewal process is identical to initial filing—login to GST portal, file Form GST RFD-11 with estimated export value for the new year, and submit. Many exporters file the new LUT in April itself ensuring no disruption to export operations. If LUT isn’t renewed and exports are made, IGST must be paid with subsequent refund claims. If LUT facility is no longer needed (business stopped exporting), simply don’t file fresh LUT—the previous year’s LUT automatically lapses. If circumstances change mid-year, LUT can be revoked by filing revocation application, though this is rare.

LUT vs Bond & Compliance

LUT vs Bond Comparison & Requirements

LUT vs Bond Difference

LUT (Letter of Undertaking) and Bond both enable zero-rated supplies without tax payment but differ significantly. LUT is a simple undertaking on plain paper without financial security, filed online, processed within minutes, valid for entire financial year, cost-free, and suitable for compliant taxpayers without adverse history. Bond requires execution on stamp paper with bank guarantee or security deposit, involves physical submission to jurisdictional officer, requires approval which may take days/weeks, usually valid for specific period or transaction value, involves stamp duty and bank charges, and mandatory for taxpayers with prosecution or detention history. For eligible exporters, LUT is far more convenient and cost-effective making it the preferred option.

LUT Validity & Limitations

LUT validity is one financial year from date of acceptance, automatically lapsing on March 31st. It covers all zero-rated supplies made during validity—there’s no transaction-wise or value-wise limit once LUT is accepted. However, LUT doesn’t exempt from other compliance requirements. Export documentation, return filing, record maintenance, and audit provisions remain fully applicable. LUT is GSTIN-specific—if you operate in multiple states with different GSTINs, separate LUTs for each registration are needed. LUT is also registration-specific—if GST registration is cancelled, LUT becomes invalid. Any change in legal name, constitution, or authorized signatories should be reflected in fresh LUT filing.

Export Invoicing Under LUT

Invoices for LUT-based exports must comply with GST invoice rules with specific additional requirements. The invoice should clearly mention “Supply meant for export under Letter of Undertaking without payment of Integrated Tax” or similar wording. Export invoice format as prescribed in GST law must be followed including supplier’s GSTIN, invoice number and date, buyer details (name, address, country), item description with HSN code, quantity, value in INR and foreign currency, and place of supply (country of import). Since no tax is charged, tax columns show zero or are marked “Not Applicable.” The LUT reference number (ARN) should ideally be mentioned for clarity. Export invoices under LUT are reported in GSTR-1 under exports without payment section.

Record Maintenance & Documentation

LUT exporters must maintain comprehensive records for audit and verification. Copies of LUT filed and acceptance acknowledgment, export invoices with buyer details, shipping bills filed with customs, bill of lading or airway bill proving actual export, export general manifest (EGM) status confirmation, bank realization certificates or foreign inward remittance certificates (FIRC) proving foreign exchange receipt, input tax credit documentation for refund claims, GSTR-1 showing export reporting, and correspondence with customs or GST authorities. These records must be preserved for minimum 6 years from financial year end. Departmental audits or verification may examine LUT compliance, proper export completion, foreign exchange realization, and absence of any domestic diversion.

Consequences of LUT Misuse

LUT misuse or violations attract serious consequences. If goods declared for export under LUT are diverted to domestic market instead, tax liability arises with interest and penalty. The exporter must pay IGST with 18% annual interest from the date of invoice plus penalty under Section 122 (up to tax amount) or Section 129 (200% of tax for detention cases). LUT facility may be revoked or suspended preventing future LUT-based exports. Criminal prosecution under Section 132 is possible if fraud or willful suppression is established. Repeated violations or significant monetary involvement can lead to arrest and imprisonment up to 5 years. These stringent provisions ensure LUT facility isn’t misused for domestic supply evasion. Genuine errors with self-reporting and rectification attract lower penalties compared to detected violations.