GST on Exports / Zero-Rated Supplies

If you are running an export business from India, or are planning to take your goods and services to the global market, a major question must have crossed your mind: "Do I have to pay GST on exports?"

Technically, exports are treated as 'Zero-Rated Supplies' under GST. This means the government does not want to burden exports with taxes, allowing Indian exporters to remain competitive in the global market. However, to avail of this tax exemption, there are two pathways:

• Pay IGST (Integrated GST) first and claim a refund from the government later.
• Export completely tax-free without paying a single rupee of IGST upfront.

Which option sounds better? Obviously, the second one! And that is exactly what a LUT (Letter of Undertaking) makes possible.

If your working capital gets blocked while waiting for tax refunds, your business growth can freeze. In this detailed guide, we will break down what an LUT is, how it works, its full form, and how you can use it to save your working capital. Let’s understand this entire process in simple terms, just like a GST consultant would explain it.

What is LUT?

Let’s start with the basics. LUT stands for Letter of Undertaking.

Under the GST regime, it is a legal document or declaration that an exporter submits online to the Government of India (GST Department). Through this document, the exporter makes a simple formal promise (undertaking) to the government:

"I am exporting my goods or services outside India, and I will fulfill all compliances as per the GST rules. If I fail to follow the export regulations, I am ready to pay the applicable GST along with interest."

The government trusts this promise and permits you to export without paying any upfront IGST. If the concept of LUT did not exist, every small and large exporter would have to block lakhs of rupees in taxes first and then wait months for refunds. To eliminate this hassle, the government introduced the online LUT filing system.

How Does LUT Work in GST?

The working mechanism of an LUT is very simple and seamless. Let’s look at the step-by-step journey of an export transaction when you have an active LUT:

• Step 1: Receiving the Export Order: You secure an order for goods or services from a foreign buyer.
• Step 2: LUT Filing: At the beginning of the financial year, you log into the GST portal and file your LUT online.
• Step 3: Generating the Tax Invoice: When creating the export invoice, you keep the tax component as Zero ($0$) and explicitly mention on the invoice:

"Supply meant for export under bond or letter of undertaking without payment of integrated tax".

• Step 4: Shipping Bill & Export: For goods, you file a shipping bill at the customs port, and the goods leave India. For services, your invoice and an FIRC (Foreign Inward Remittance Certificate) serve as the primary proof of export.
• Step 5: GSTR-1 & GSTR-3B: In your monthly or quarterly GST returns, you declare this transaction specifically as an 'Export under LUT'.

Practical Example:

Let’s say Rahul is a software developer based in Delhi. He built software for a US client worth $5,000 (approx. ₹4,15,000).

• Without LUT: If Rahul doesn't have an LUT, he must pay 18% IGST (approx. ₹74,700) out of his own pocket to the government before delivering the software, and then apply for a refund and wait for months.
• With LUT: Since Rahul filed his LUT on the GST portal, he directly invoices the client without adding the ₹74,700 tax. His money is never blocked, keeping his cash flow perfectly smooth!

What is the Full Form of LUT?

As mentioned earlier, the full form of LUT is Letter of Undertaking.

From a legal and business perspective, "Undertaking" means taking responsibility or giving an assurance. Because the government is giving you the privilege of sending goods out of the country without paying taxes, they require this formal, signed document. It serves as proof that you are a registered, genuine taxpayer committed to following the country's export laws.

Why is LUT Important in GST?

From a GST consultant's viewpoint, an LUT is nothing short of a lifeline for exporters. Here is why it is absolutely essential:

• Saves Working Capital: Cash flow is the lifeblood of any business. If your funds are locked up in tax returns, buying new raw materials becomes difficult. An LUT keeps your working capital free.
• Freedom from Refund Delays: Getting a refund from the GST department can sometimes be a lengthy, tedious process involving document verification and follow-ups. An LUT completely bypasses this headache.
• Zero Cash Outflow: There is zero tax outflow from your pocket at the time of export, maintaining high business liquidity.
• Simplifies the Export Process: You don't have to calculate and pay taxes for every single invoice. File it once, and export freely for the entire year.

Who Can File an LUT? (Eligibility Criteria)

According to GST rules, certain eligibility criteria must be met to avail of the LUT facility:

Eligible Categories:

• Registered Taxpayer: You must hold a valid and active GSTIN (GST Identification Number).
• Exporter of Goods/Services: You must be genuinely engaged in the business of exporting goods or services outside India.
• SEZ Suppliers: Supplying goods or services to Special Economic Zone (SEZ) units or SEZ developers is treated as a 'Deemed Export' (Zero-Rated). Therefore, SEZ suppliers are also eligible to file an LUT.
• No Prosecution: Most importantly, the taxpayer must not have been prosecuted for tax evasion under the CGST Act, 2017 (or any existing law) where the tax evaded exceeds ₹2.5 Crores.

Ineligible Cases:

If a business owner has a history of tax evasion or significant compliance defaults and has been prosecuted, they lose the LUT facility. Such taxpayers must instead submit an Export Bond along with a Bank Guarantee.

In Which Transactions is an LUT Used?

An LUT cannot be used for domestic sales. It is strictly meant for Zero-Rated Supplies, majorly covering these 4 scenarios:

• Export of Goods: Shipping physical products (e.g., garments, handicrafts, engineering goods, spices) from India to another country.
• Export of Services: Providing online services (e.g., IT services, consulting, graphic designing, digital marketing) from India to foreign clients, where the payment is received in convertible foreign currency (USD, EUR, GBP, etc.).
• Supply to SEZ Units: Selling raw materials or providing services to a business unit located within a Special Economic Zone in India.
• Supply to SEZ Developers: Supplying to a company that is developing an SEZ zone.

Real-Life Example:

A textile company in Surat supplies synthetic fabric to a boutique in Germany (Export of Goods). Simultaneously, they provide building maintenance services to an office operating inside a Noida SEZ (Supply to SEZ). In both cases, the company can use an LUT to supply tax-free.

Benefits of LUT Filing

To summarize, filing an LUT gives you the following direct advantages:

• No IGST Outflow: No financial obligation to pay tax on export invoices upfront.
• Better Cash Flow Management: Your bank balance remains available to take on bigger orders and scale operations.
• Faster Customs Clearance: Logistics become quicker as you don't need to link tax payment challans to your shipping bills.
• Reduced Compliance Burden: Eliminates the headache of repeatedly filing Form GST RFD-01 (Refund Form).
• Independence from Administrative Delays: Government processing times won’t impact your day-to-day business operations.
• One-Time Annual Activity: It takes just 10 minutes to complete online once a year, giving you 12 months of stress-free exporting.

Difference Between LUT and Export Bond

Many new business owners confuse an LUT with an Export Bond. Let's clear up this confusion with a direct comparison:

Feature	Letter of Undertaking (LUT)	Export Bond (Form GST RFD-11)
Meaning	A simple online self-declaration/undertaking.	A formal legal agreement executed on non-judicial stamp paper.
Eligibility	Available to all registered exporters not prosecuted for major tax evasion.	Required for those who do not qualify for an LUT or have a history of tax offenses.
Bank Guarantee	NOT required.	Generally requires a Bank Guarantee of up to 15% of the bond amount.
Security Requirement	Zero financial security needed.	Exporters must block bank funds or property as collateral security.
Filing Process	100% online via the GST portal; takes 5-10 minutes.	Semi-online/manual process; documents must be physically submitted to the jurisdictional officer.
Cost	Completely Free of Cost.	Expensive due to stamp paper fees and bank guarantee charges.
Validity	Valid for 1 whole Financial Year.	Valid either for a specific consignment or runs as a continuous running bond.

Documents Required to File an LUT

The GST portal uses a system-driven process for LUT applications, meaning you don't need to upload heavy files. However, you should keep the following basic details ready before applying:

• Valid GSTIN: Your active GST registration number.
• PAN Card: Permanent Account Number of the business or proprietor.
• IEC (Import Export Code): Issued by the DGFT (Mandatory for exporting goods).
• Authorized Signatory Details: Name and details of the proprietor, partner, or director signing the form.
• Witness Details: You need to provide the Name, Occupation, and Address of two (2) witnesses. No physical documents are uploaded for them; only text details are required.

Step-by-Step LUT Filing Process on GST Portal

Here is the latest and easiest way to file your LUT online:

Step 1: Log in to the GST Portal

Go to https://www.gst.gov.in/ and log in using your valid username and password.

Step 2: Navigate to 'Furnish LUT'

On the dashboard, click on Services > User Services > Furnish Letter of Undertaking (LUT).

Step 3: Select the Financial Year

Choose the relevant Financial Year for which you wish to export from the dropdown menu (e.g., select FY 2026-27 if filing for the current period).

Step 4: Fill Previous LUT Reference (If Applicable)

If you filed an LUT in the previous financial year, enter its Application Reference Number (ARN) and date. If you are a new exporter, leave this section blank.

Step 5: Fill Undertaking & Witness Details

Check the three checkboxes to accept the legal terms of the undertaking. In the next section, fill in the names, occupations, and complete addresses of your two witnesses.

Step 6: Verification & Submission

Enter the place of filing and select the Authorized Signatory's name. You can submit using one of two options:

• Submit with DSC: Mandatory for Private Limited Companies and LLPs (uses a Digital Signature Certificate).
• Submit with EVC: Available for Sole Proprietorships and Partnerships (uses an OTP sent to the registered mobile/email).

Once submitted, an ARN (Application Reference Number) will instantly generate on your screen.

How to Download Your LUT Certificate?

After successful submission, you should download the certificate for customs clearance and internal records:

• Log in to the GST Portal.
• Go to Services > User Services > View/Download Certificates.
• Locate your LUT application using the ARN and click Download to save the PDF file.

Validity of an LUT

Rule of Thumb: An LUT is always valid for One (1) Financial Year.

In India, a financial year runs from 1st April to 31st March. For example, even if you file your LUT in May 2026, its validity will end on 31st March 2027. On 1st April 2027, you must file a new LUT for the next financial year.

Important Tip: If you are exporting throughout FY 2026-27, ensure you file your renewal at the beginning of April 2026. If you forget to renew, the customs department can delay your April shipments or demand tax.

How to Renew?

There is no separate renewal form. On 1st April every year, simply repeat the step-by-step filing process mentioned above, select the new Financial Year, mention the previous year's ARN for reference, and submit. The system will instantly issue your new certificate.

What Happens if You Don't File an LUT?

Exporting without a valid or active LUT can lead to several business complications:

• Mandatory IGST Outflow: You must charge tax on the invoice and clear it using your cash/credit ledger before shipping.
• Working Capital Blockage: Your business capital will get stuck in government records. The refund process can easily take 30 to 90 days (or more), disrupting your daily operations.
• Customs Delays: Customs officers at ports can hold up your shipping bills if they cannot verify a valid LUT link on the GST network.
• Interest and Penalties: If you export without paying tax and fail to file an LUT, the GST department can issue a demand notice forcing you to pay the tax along with interest up to 18% per annum.

Common Mistakes to Avoid in LUT Filing

• Selecting the Wrong Financial Year: Exporters often select the wrong year in a hurry. Always cross-check the calendar period before hitting submit.
• Incorrect Witness Details: Avoid putting fake names or addresses that don't match reality. Always use details of genuine individuals (staff, friends, or relatives).
• Using an Expired LUT in April: Forgetting that the LUT expires on 31st March and continuing to clear April invoices on the older document. Make renewal your priority on 1st April.
• Data Mismatch in Shipping Bills: Ensure the invoice number generated on your GST portal matches exactly with the invoice number provided to customs handlers.

Case Study: The Impact of LUT on Business Profitability

Let’s see how an LUT alters a business's operational strength through a real-world scenario.

Scenario: M/s Royal Crafts is a textile exporter based in Jaipur. They have a massive shipment of designer bedsheets ready for a retail chain in the USA, valued at ₹50,00,000 (50 Lakhs). The GST rate on these textiles is 12%.

Case A: They Do NOT Have an LUT

• Tax Calculation: They must pay 12% IGST on ₹50 Lakhs, which amounts to ₹6,00,000 (6 Lakhs).
• Cash Outflow: Royal Crafts must arrange ₹6 Lakhs from their current bank reserves or overdraft limits to pay the government before shipping.
• Refund Lag: After shipping, they file a refund claim (RFD-01). Following verifications, the refund takes 4 months to hit their account.
• Business Impact: For 4 months, ₹6 Lakhs remained frozen. They couldn't purchase raw cotton for their next order and had to take a short-term bank loan, adding interest expenses.

Case B: They HAVE an Active LUT

• Tax Calculation: Because they have an LUT, the immediate tax liability drops to Zero ($0$).
• Invoice Label: The invoice is legally stamped: "Export under LUT without payment of tax".
• Cash Outflow: ₹0. Not a single rupee is blocked.
• Business Impact: The ₹6 Lakhs saved remained in their bank account. They immediately utilized it to start the next production cycle, ensuring smooth, uninterrupted business growth.

Latest Rules for LUT Under GST

• 100% Faceless and Online: Exporters no longer need to physically visit the GST department for LUT approvals. The entire tracking and processing happen via the portal.

Time-Bound Export Limits (Rule 96A):

• For Goods: The goods must physically leave India within 3 months from the date of the export invoice.
• For Services: The foreign payment (remittance) must be received in India within 1 year from the invoice date.

Failure to meet these timelines requires the exporter to pay the due GST along with interest within 15 days.

FAQs

Q1. What is the full form of LUT?

Ans. The full form of LUT is Letter of Undertaking. It is a legal declaration filed online via the GST portal.

Q2. What is the main purpose of an LUT in GST?

Ans. It allows exporters to ship goods and services outside India (or supply to SEZ units) without paying integrated GST (IGST) upfront.

Q3. Can service exporters also file an LUT?

Ans. Yes. Freelancers, IT firms, consultants, and digital marketers receiving payments in foreign currency are fully eligible to file an LUT.

Q4. How long is an LUT valid?

Ans. An LUT is valid for exactly one financial year (from its date of filing up to 31st March).

Q5. Do I need to renew my LUT every year?

Ans. Yes, because it expires on 31st March, you must file a fresh LUT renewal on the GST portal every 1st of April.

Q6. What is the core difference between an LUT and a Bond?

Ans. An LUT is completely free and requires no bank guarantee. An Export Bond is used by those who don't qualify for an LUT and requires a physical stamp paper along with a bank guarantee.

Q7. How can I download my filed LUT certificate?

Ans. Log in to the GST Portal > Go to Services > User Services > View/Download Certificates and download the PDF.

Q8. Is a Digital Signature Certificate (DSC) mandatory to file an LUT?

Ans. DSC is mandatory for Private Limited Companies and LLPs. Sole Proprietorships and Partnership firms can easily submit using an EVC (Mobile/Email OTP).

Q9. What happens if I export without filing an LUT?

Ans. You will have to pay the full IGST amount upfront on your export invoices and apply for a refund later, blocking your business liquidity.

Q10. Can I use an LUT for supplies made to an SEZ?

Ans. Yes, supplies to Special Economic Zone (SEZ) units or developers are treated as zero-rated, making them fully eligible for LUT benefits.