What is LUT in GST? GST Filing, Compliance and Exemptions
Posted By: Admin Published: 05-10-2026
Table of Contents
- 1. What Is LUT in GST?
- 2. Why Is LUT Important for Exporters?
- 2.1. 1. Helps Avoid Upfront IGST Payment
- 2.2. 2. Supports Cash Flow
- 2.3. 3. Simplifies Export Compliance
- 2.4. 4. Allows Refund of Eligible Input Tax Credit
- 2.5. 5. Useful for Regular Exporters
- 3. Who Can File LUT Under GST?
- 4. LUT Under GST: Legal Framework
- 5. Documents and Information Required for LUT Filing
- 6. How to File LUT in GST Online?
- 6.1. Step 1: Log in to the GST Portal
- 6.2. Step 2: Select LUT Services
- 6.3. Step 3: Enter Required Details
- 6.4. Step 4: Submit the Undertaking
- 6.5. Step 5: Save the Acknowledgement
- 7. LUT Validity and Renewal
- 8. What Happens If an Exporter Does Not File LUT?
- 9. Export Compliance Conditions Under LUT
- 10. LUT vs Payment of IGST on Export
- 11. Common Mistakes in LUT Filing
- 11.1. 1. Filing LUT After Export
- 11.2. 2. Forgetting Annual Renewal
- 11.3. 3. Incorrect Witness Details
- 11.4. 4. Ignoring Export Timelines
- 11.5. 5. Not Maintaining Export Records
- 11.6. 6. Assuming LUT Replaces GST Returns
- 12. LUT and GST Filing Compliance
- 13. How Tripathi & Arora Can Help With LUT and GST Compliance
- 14. Conclusion
- 15. FAQs
- 15.1. Q1. What is LUT in GST?
- 15.2. Q2. What is the full form of LUT in GST?
- 15.3. Q3. Which form is used for LUT filing?
- 15.4. Q4. How long is a GST LUT valid?
- 15.5. Q5. Can LUT be used for export of services?
- 15.6. Q6. Is LUT mandatory for every exporter?
- 15.7. Q7. What happens if LUT is not filed before export?
What is LUT in GST? LUT stands for Letter of Undertaking, a declaration that allows eligible GST-registered exporters to supply goods or services for export without paying Integrated Goods and Services Tax (IGST) upfront. LUT is particularly important for businesses involved in exports because it can help maintain cash flow and simplify the GST refund process.
Under GST, exports and eligible supplies to Special Economic Zones (SEZs) are treated as zero-rated supplies. An eligible registered person can furnish an LUT in Form GST RFD-11 under Rule 96A of the CGST Rules to make such supplies without payment of IGST, subject to the prescribed conditions.
For exporters, understanding LUT filing, GST compliance, eligibility, validity and renewal is essential to avoid unnecessary tax payments and compliance issues.
What Is LUT in GST?
A Letter of Undertaking (LUT) is a formal undertaking submitted by an eligible registered taxpayer to the GST authorities. It allows the taxpayer to export goods or services without paying IGST at the time of export.Instead of paying IGST and subsequently applying for a refund, an eligible exporter can use an LUT and make the export without upfront IGST payment.
This can be particularly useful for businesses that regularly export goods or services because it helps prevent working capital from being blocked in taxes.
Why Is LUT Important for Exporters?
LUT is an important GST compliance mechanism for businesses involved in international trade.1. Helps Avoid Upfront IGST Payment
An eligible exporter can make zero-rated exports without paying IGST upfront when a valid LUT is in place.2. Supports Cash Flow
Export businesses often have significant operating expenses. Avoiding upfront IGST payment can help businesses maintain liquidity for working capital and business operations.3. Simplifies Export Compliance
Instead of paying IGST on every eligible export and subsequently claiming a refund, an exporter can follow the LUT route, subject to GST rules.4. Allows Refund of Eligible Input Tax Credit
Exports made under LUT are zero-rated supplies, and eligible exporters may claim a refund of accumulated input tax credit, subject to applicable conditions and procedures.5. Useful for Regular Exporters
Businesses that frequently export goods or services can benefit from maintaining a valid LUT throughout the financial year.Who Can File LUT Under GST?
Generally, a GST-registered person who intends to supply goods or services for export without payment of IGST can furnish an LUT, subject to the conditions prescribed under GST law.
LUT may be relevant for:
- Exporters of goods
- Exporters of services
- Businesses making eligible zero-rated supplies to SEZ units
- SEZ-related suppliers making eligible supplies
A person who falls within the prescribed disqualification relating to prosecution for certain tax offences may need to use a bond instead of an LUT. The specific facts and applicable provisions should be reviewed before filing.
LUT Under GST: Legal Framework
The LUT mechanism is primarily associated with Section 16 of the IGST Act, 2017 and Rule 96A of the CGST Rules, 2017.
Rule 96A provides for furnishing a bond or LUT in Form GST RFD-11 where a registered person opts to export goods or services without payment of integrated tax.
The LUT route is therefore not simply a GST exemption application. It is an undertaking by the exporter to comply with the conditions associated with zero-rated supplies.
Documents and Information Required for LUT Filing
The online LUT process generally uses information already available with the taxpayer's GST registration. Businesses should keep the following information ready:- Active GSTIN
- Details of the authorised signatory
- Details of two independent witnesses
- PAN and other registration details as applicable
- Digital Signature Certificate (DSC) or applicable electronic verification
- Previous LUT acknowledgement, where relevant for internal records
- Import Export Code (IEC), where applicable for export activities
How to File LUT in GST Online?
LUT filing is generally completed electronically through the GST portal.Step 1: Log in to the GST Portal
The authorised person should log in using the business's GST credentials.Step 2: Select LUT Services
Navigate to the relevant LUT facility under the GST portal's services/user-services section and select the appropriate financial year.Step 3: Enter Required Details
Review the auto-populated business information and provide the required authorised-signatory and witness details.Step 4: Submit the Undertaking
Review the declaration carefully and submit the LUT using the applicable authentication method, such as DSC or EVC, depending on the taxpayer's requirements.Step 5: Save the Acknowledgement
After successful submission, an Application Reference Number (ARN)/acknowledgement is generated. Businesses should download and retain the acknowledgement for their records.LUT Validity and Renewal
An LUT is generally valid for one financial year, meaning it applies for the relevant financial year ending on 31 March. Exporters who want to continue making eligible exports without upfront IGST payment should furnish a fresh LUT for the next financial year.
For example, an exporter intending to continue the LUT facility during a new financial year should ensure that the new LUT is furnished before undertaking the relevant export transactions.
Regular renewal is an important part of GST compliance because an expired LUT should not be relied upon for subsequent exports.
What Happens If an Exporter Does Not File LUT?
An exporter who does not use the LUT route may generally choose the alternative mechanism of paying IGST on eligible exports and subsequently claiming a refund, subject to applicable law and procedures.
This can affect working capital because tax is paid upfront before the refund is received.
Therefore, businesses making regular exports should evaluate the LUT route before commencing export transactions.
Export Compliance Conditions Under LUT
Filing an LUT does not remove the exporter's other GST obligations. For goods, Rule 96A prescribes a timeline for export after the invoice date.For services, the prescribed conditions include receipt of payment within the specified period. If the conditions are not fulfilled, the taxpayer may become liable to pay the applicable tax along with interest, subject to the rules and any extension permitted by the authorities.
Exporters should therefore maintain proper records of:
Both mechanisms operate within the GST framework. Businesses should select the appropriate route based on their transactions, cash-flow position and applicable tax provisions.
- Export invoices
- Shipping bills
- Foreign remittance/payment records
- GST returns
- LUT acknowledgement
- Bank documents
- Input tax credit records
- Contracts and export agreements
LUT vs Payment of IGST on Export
| Basis | Export Under LUT | Export With IGST |
|---|---|---|
| Upfront IGST | Not paid, subject to eligibility | Paid upfront |
| Refund | Eligible ITC refund may be claimed subject to conditions | IGST refund may be claimed subject to conditions |
| Working Capital | Generally less blockage | Tax may remain blocked until refund |
| LUT | Required | Not required for this route |
| Suitable For | Eligible regular exporters | Businesses choosing the IGST-payment route |
Common Mistakes in LUT Filing
Exporters should avoid the following common compliance mistakes:1. Filing LUT After Export
An LUT should be furnished before undertaking the relevant export transaction. It should not be treated as a mechanism for retrospectively covering transactions already completed.2. Forgetting Annual Renewal
LUT validity is linked to the financial year. Businesses should plan renewal before starting exports in the new financial year.3. Incorrect Witness Details
Incomplete or inaccurate witness information can create filing issues.4. Ignoring Export Timelines
Exporters must comply with the timelines and conditions prescribed under Rule 96A.5. Not Maintaining Export Records
Proper documentation is essential for GST returns, refunds, audits and other compliance requirements.6. Assuming LUT Replaces GST Returns
LUT does not eliminate regular GST compliance. Export transactions still need to be appropriately reported in applicable GST returns.LUT and GST Filing Compliance
LUT should be viewed as one part of an exporter's overall GST compliance system.
Businesses should ensure that export invoices, GST returns, shipping documents, payment records and input tax credit information are properly reconciled.
Accurate reporting also helps reduce discrepancies between GST records and other export-related documents.
Regular GST compliance can help businesses identify errors early and maintain better financial records.
How Tripathi & Arora Can Help With LUT and GST Compliance
Managing LUT filing along with GST returns, export documentation, input tax credit and reconciliation can become complicated for growing businesses.
Tripathi & Arora Associates LLP provides professional support in areas including GST, accounting and taxation, business registrations, compliance and related business advisory services. For exporters, professional assistance can help with LUT filing, GST compliance, documentation and ongoing tax-related requirements.
Businesses can also benefit from reviewing their GST processes periodically to identify filing errors, documentation gaps and potential compliance issues.
Conclusion
Understanding What is LUT in GST is important for every business involved in exports or eligible zero-rated supplies. A valid Letter of Undertaking can allow eligible taxpayers to export goods or services without paying IGST upfront, helping businesses manage working capital more efficiently.
However, LUT filing is only one part of export GST compliance. Businesses must also maintain proper records, file applicable GST returns, follow export timelines, reconcile transactions and renew the LUT for each financial year.
For exporters looking to maintain smooth GST compliance, professional assistance can make the filing and documentation process more organised and reduce the risk of avoidable errors.
