A letter of undertaking lets you ship goods or services abroad without paying integrated tax upfront. It directly protects your cash flow. By avoiding the typical pay-and-refund cycle, you keep your business money free. Registered taxpayers simply apply for this yearly document on the government portal before completing their zero-rated transactions.
Key Takeaways
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A Letter of Undertaking allows you to execute zero-rated export supplies without paying Integrated Goods and Services Tax upfront.
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Clean tax compliance records dictate your eligibility for this facility.
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You must complete the application online via the common portal before making export shipments.
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Missing annual renewal timelines invalidate your export tax benefits immediately.
What is a Letter of Undertaking (LUT) in GST?
An LUT stands for Letter of Undertaking. You submit this formal declaration online using the GST portal. The document lets you process zero-rated exports without paying integrated GST upfront. This means you skip the slow grind of paying tax first and chasing the government for a refund later.
Any registered taxpayer exporting goods or services can file one. However, you lose eligibility if authorities prosecute you for tax evasion over ₹2.5 crore. The main benefit is keeping your working capital free for daily expenses rather than tying it up in pending refunds.
Who Can Apply for LUT Under GST?
Exporting from India gets a lot easier when you protect your cash flow. Most business entities can start tax-free exports seamlessly.
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Any GST-registered business selling goods or services overseas or to SEZ units is eligible to use a LUT under GST.
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You lose this choice if officials prosecute your business for tax evasion exceeding ₹2.5 crore. Those taxpayers must furnish a bond instead.
Benefits of Filing LUT in GST
Using a LUT in GST provides immediate operational advantages for an export business. First, it eliminates the need to pay tax at the time of shipping.
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Your capital remains inside the business instead of sitting in government accounts for months.
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Administrative workloads decrease because your team avoids filing frequent tax refund claims.
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Transaction costs drop since you do not need to arrange bank guarantees for standard shipments.
Also Read About: What is Goods and Services Tax (GST)?
Documents Required for LUT Registration
You do not need to upload physical documents to the portal anymore. You just need the following documents for audit and verification purposes:
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GST Registration Certificate
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PAN Card of the business
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IEC (Importer Exporter Code), if exporting goods
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Previous year's LUT ARN (if applicable)
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Aadhaar cards of two independent witnesses
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Authorised signatory details (for DSC/EVC)
How to Apply for LUT Under GST?
The online application process on the government portal takes minimal time when you follow the sequence below.
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Log in to the official portal using your corporate credentials.
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Navigate to the Services tab and select User Services from the menu.
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Click on the option to Furnish Letter of Undertaking.
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Select the specific financial year for which you are applying.
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Fill Form GST RFD-11 carefully by entering the required details.
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Provide the names and addresses of two independent witnesses.
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Sign the form using your DSC or EVC code.
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Submit the application to generate your Application Reference Number.
The portal generates your Application Reference Number (ARN) acknowledgement immediately after submission.
Validity and Renewal of LUT Under GST
An approved document remains valid for the duration of a single financial year. You must file a fresh application prior to the start of each new fiscal period. Failing to secure a timely renewal forces your business to pay full IGST on shipments out of pocket.
Note: Annual renewals before April 1st are mandatory to keep your tax benefits active.
Also Read About: What is Integrated Goods and Services Tax (IGST)?
LUT vs Bond Under GST
Exporters who do not meet the standard eligibility criteria must execute a bond instead.
|
Parameter |
LUT |
Bond |
|
Applicability |
Eligible clean taxpayers |
Non-eligible or prosecuted taxpayers |
|
Security/ Bank Guarantee |
None required |
Requires bank guarantee up to 15% of bond value |
|
Documentation |
Form GST RFD-11 on portal |
Physical stamp paper with bank signatures |
|
Tax Implication |
No upfront tax |
No upfront tax but high compliance cost |
|
Cost |
Free online filing |
High bank fees and stamp duties |
Impact of LUT on Export Refunds and Tax Liability
A LUT reshapes how you handle export refunds and tax obligations. Filing it means you skip paying IGST on exports upfront. Because there is no tax paid, you never have to chase down a refund.
This keeps your working capital from getting trapped for 60 to 90 days, which is what usually happens when waiting on tax departments.
You also completely avoid the audits and typical delays that come with refund claims. Your tax liability is waived if exports meet strict Rule 96A timeline: 3 months for goods or 1 year for services. Missing these limits triggers full IGST payment plus 18% annual interest.
Also Check: What is GST Return?
Common Challenges and Solutions in LUT Filing
The process is simple, but small slips cause delays. Watch out for the following challenges:
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Missing the annual renewal: This happens constantly. Put a calendar alert for the final week of March every year.
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Mismatched witness details: Use independent witnesses who have no relationship to your firm. Also, you need to make sure their details are completely accurate.
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Losing the ARN: Download your acknowledgement copy immediately. You need this to prove you actually filed the paperwork.
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Using the wrong signature type: LLPs and corporate entities are legally required to sign off with a DSC.
Recent Updates and Amendments
The online facility to file LUT for the Financial Year 2026-27 (valid from April 1, 2026, to March 31, 2027) is officially live on the GST portal. Exporters need to file a fresh LUT before issuing their first zero-rated invoice to avoid cash flow issues.
With the recent updates, after submitting the GST RFD-11 on the portal, the application is processed via an automated system, granting immediate 'Deemed Approved' status if no tax officer grants it within 3 working days. So exports can resume without manual delays.
The prior threshold of ₹1,000 for export refund processing has been removed. All valid refund claims are now processed. This removes barriers for smaller exporters claiming accumulated Input Tax Credits (ITC).
Conclusion
A Letter of Undertaking is a core requirement for smooth export work under current regulations. You need to track when your annual version expires and file a renewal before that date. Taking this small, digital step protects your profit margins and keeps your business capital from getting tied up.
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