Letter of Undertaking: Meaning, Process and Format Under GST

If you run a business that exports goods or services, you may have come across the term "letter of undertaking" while dealing with GST compliance. Filing this document correctly can save your business from paying tax upfront on every export transaction. For small business owners and self-employed exporters, understanding this process is not just a compliance requirement. It is a practical way to protect working capital and keep operations running smoothly.

What is the Letter of Undertaking in GST?

A letter of undertaking, commonly known as an LUT, is a formal declaration submitted by an exporter to the GST authorities. Through this document, the exporter commits to fulfilling all conditions prescribed under GST law while exporting goods or services without paying Integrated Goods and Services Tax (IGST).

The letter of undertaking does not function as a contract between two parties. It is a compliance document filed with the government, giving the exporter permission to carry out zero-rated exports without making an upfront tax payment.

Under Rule 96A of the Central Goods and Services Tax Rules, 2017, eligible exporters can file an LUT through the GST portal using Form GST RFD-11. Once accepted, the exporter is not required to pay IGST at the time of export.

Who is Eligible to File a Letter of Undertaking?

Not every exporter is automatically eligible to file an LUT. The following conditions must be met:

• The exporter must be registered under GST
• The business must have a valid Import Export Code (IEC) issued by the Directorate General of Foreign Trade
• The exporter must not have been prosecuted for tax evasion of ₹2.5 crore or more under the CGST Act, 2017 or the IGST Act, 2017
• The LUT must be filed on the letterhead of the GST-registered entity
• For companies, the document must be signed by an authorised signatory such as a managing director, company secretary or a person duly authorised by the board

If an exporter has previously defaulted on conditions mentioned in the LUT, the facility may be withdrawn until compliance is restored.

Letter of Undertaking in GST: Step-by-Step Filing Process

Filing an LUT is entirely online and free of cost. Here is how to complete the process on the GST portal:

Step 1: Log in to the GST portal using your registered credentials.

Step 2: Navigate to "Services," then select "User Services" and click on "Furnish Letter of Undertaking (LUT)."

Step 3: From the drop-down menu, select the financial year for which the LUT is being filed.

Step 4: Fill in the required details in Form GST RFD-11. This includes your GSTIN, business name and export details.

Step 5: Enter the place of filing, then save and preview the form to check for errors.

Step 6: Provide witness details, including name and address, as required by the form.

Step 7: Sign and submit the form using either a Digital Signature Certificate (DSC) or an Electronic Verification Code (EVC).

Step 8: Upon successful submission, an Application Reference Number (ARN) will be generated. Download and retain the acknowledgement for your records.

The LUT is valid for one financial year only. It must be renewed at the beginning of each new financial year before any export transactions are carried out.

Documents Required to File a Letter of Undertaking in GST

The following documents are typically needed when filing a letter of undertaking on the GST portal:

• GST registration certificate
• PAN card of the business or proprietor
• Import Export Code (IEC)
• Aadhaar card and address proof of the authorised signatory
• Witness details including full name and address
• Authorisation letter or board resolution for the authorised signatory
• Duly filled Form GST RFD-11
• Previous LUT certificate, if applicable
• DSC of the authorised signatory in the case of a company

Sample Format for a Letter of Undertaking (LUT)

Below is a simplified representation of the LUT structure as per Form GST RFD-11:

FORM GST RFD-11

I/We [Name of Exporter] having GSTIN [Number] hereby undertake to export goods or services without payment of integrated tax in accordance with the provisions of GST law and agree to abide by all conditions prescribed therein.

Signature of Authorised Signatory

Name: ____________

Designation: ____________

Date: ____________

Place: ____________

Witnesses:

1. Name and Address
2. Name and Address

The actual form on the GST portal includes additional fields for GSTIN, financial year, export details and witness information. Exporters are advised to fill in all fields carefully before submission.

Benefits of Filing a Letter of Undertaking for Exporters

Filing an LUT offers several practical advantages, especially for businesses that export regularly:

No upfront IGST payment: Exporters can ship goods or provide services without paying tax at the time of export

Improved cash flow: Working capital is not blocked waiting for a refund

Faster export clearance: Consignments are not held up due to pending tax payments

Reduced compliance burden: Eliminates the need to file refund claims for every export transaction

Cost-free process: Filing an LUT on the GST portal involves no fee

For businesses that export frequently, these benefits can add up significantly over a financial year. If you are planning to scale your export operations and need financial support, you can use the Business Loan EMI Calculator to estimate repayment amounts before applying.

Also Read: 5 Strategies to Repay Your Business Loan Efficiently

What Happens if You Export Without Filing an LUT?

If an exporter does not file an LUT before carrying out an export transaction, the following consequences apply:

• IGST must be paid at the time of export
• The exporter can later apply for a refund of the tax paid, but this process takes time
• Working capital gets blocked during the refund processing period
• Repeated non-compliance or defaults on LUT conditions can attract interest, penalties or legal action under the CGST Act, 2017

It is strongly advisable to file the LUT before the start of each financial year and certainly before initiating any export transaction.

Key Compliance Tips for Maintaining Your LUT Status

Exporters who have filed an LUT should keep the following points in mind throughout the year:

• Renew the LUT at the beginning of every financial year before exporting
• Maintain proper documentation for all export transactions, as these may be reviewed during audits
• Ensure that export proceeds are realised within the time prescribed under the Foreign Exchange Management Act (FEMA) and GST law
• If conditions are not met, the LUT facility can be withdrawn by tax authorities
• Keep a copy of the acknowledgement and ARN for every LUT filed

Staying compliant not only protects your export privileges but also builds a stronger compliance record, which can be useful when applying for Business Loan.

Also Read: Everything you need to know about Business Loan – A definitive guide

LUT Versus Export Bond: Understanding the Difference

Exporters who are not eligible to file an LUT have the option of furnishing an export bond. Here is a quick comparison:

For most registered exporters who meet the eligibility criteria, filing an LUT is the more practical and cost-effective option.

Final Thoughts

A letter of undertaking is one of the most useful tools available to exporters under the GST framework. It removes the need for upfront IGST payment, protects working capital and simplifies the overall export process. Whether you are a small business owner exporting for the first time or an established enterprise managing regular shipments, filing an LUT before each financial year is a straightforward step that can make a meaningful difference to your cash flow.

Understanding the letter of undertaking meaning, the eligibility conditions and the filing process puts you in a stronger position to manage your GST obligations confidently. Pair this with sound financial planning and the right business finance support, and your export operations can run with far greater efficiency.

Apply now for a Business Loan.

FAQs

Q.1. What is the full meaning of a letter of undertaking in GST?

A. A letter of undertaking is a declaration filed by an exporter on the GST portal, committing to comply with all GST conditions while exporting goods or services without paying IGST. It is governed by Rule 96A of the CGST Rules, 2017.

Q.2. Is it mandatory to file an LUT before every export?

A. Yes, an LUT must be filed before carrying out any export transaction in a financial year. If exports are made without a valid LUT, the exporter must pay IGST upfront and then apply for a refund separately.

Q.3. How long is a letter of undertaking valid under GST?

A. An LUT filed under GST is valid for one financial year. Exporters must renew it at the start of each new financial year to continue exporting without payment of IGST.

Q.4. Can an LUT be cancelled or rejected by tax authorities?

A. Yes, tax authorities can cancel or withdraw an LUT if the exporter fails to meet the prescribed conditions or defaults on compliance. In such cases, IGST must be paid on all exports until a new LUT is approved.

Q.5. Is there any fee for filing a letter of undertaking on the GST portal?

A. No, filing an LUT on the GST portal is completely free of charge. The process is fully online and can be completed using a Digital Signature Certificate or an Electronic Verification Code.

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