GST Export: LUT Filing, Refund Process & Zero-Rated Supply — Complete Guide

Understanding the Zero-Rated Supply Framework

The zero-rated supply regime is the cornerstone of India’s export competitiveness under GST. The fundamental principle is that taxes should not be exported — the destination country taxes consumption, and the origin country ensures that goods and services leave its territory free of domestic tax burden. This is achieved through the zero-rating mechanism under Section 16 of the IGST Act, read with Section 16 of the CGST Act (which governs input tax credit eligibility).

What Qualifies as Zero-Rated Supply?

Section 16(1) of the IGST Act defines zero-rated supply to cover two categories:

• Export of goods or services or both: “Export of goods” is defined under Section 2(5) of the IGST Act as taking goods out of India to a place outside India. “Export of services” is defined under Section 2(6) of the IGST Act with five cumulative conditions — the supplier must be located in India, the recipient must be located outside India, the place of supply must be outside India, payment must be received in convertible foreign exchange or Indian rupees wherever permitted by RBI, and the supplier and recipient must not be merely establishments of the same person
• Supply to SEZ developer or SEZ unit: Supplies made to a SEZ unit or developer for authorised operations are treated as zero-rated, even though the physical movement of goods occurs within India. This is a deemed export under the IGST Act framework

Two Routes for Zero-Rated Supply

Section 16(3) of the IGST Act provides two options to the registered person making zero-rated supply. The choice between these routes has significant implications for working capital, compliance burden, and refund timelines.

Parameter	Route 1: LUT + ITC Refund (Rule 89)	Route 2: IGST Payment + Refund (Rule 96)
IGST payment on export	No — export under LUT/bond	Yes — full IGST at applicable rate
Refund type	Refund of unutilised ITC	Refund of IGST paid on export
Refund application	Manual — RFD-01 with documents	Automatic — based on ICEGATE data
Processing time	Typically 60-90 days (officer scrutiny)	Typically 7-14 days (automated)
Working capital impact	Lower — no upfront IGST outflow	Higher — IGST paid upfront, blocked until refund
Key risk	ITC mismatch, formula disputes	ICEGATE-GSTN data mismatch blocking refund
Governing rule	Rule 89 of CGST Rules	Rule 96 of CGST Rules
Pre-condition	Valid LUT in Form RFD-11	None — simply pay IGST on invoice

LUT Filing: Procedure, Eligibility & Annual Renewal

Who is Eligible to File LUT?

Under Rule 96A(1) of the CGST Rules, any registered person is eligible to furnish a LUT, subject to one disqualification: a person who has been prosecuted for any offence under the CGST Act or under any of the existing laws (State VAT, Central Excise, Service Tax) where the amount of tax evaded exceeds two hundred and fifty lakh rupees (₹2.5 Crore) is not eligible. Note the distinction — the disqualification is on account of prosecution, not mere issuance of show cause notice or demand. Until prosecution is actually launched, the LUT facility remains available.

Filing Procedure — Form GST RFD-11

The LUT is filed electronically on the GST portal (gst.gov.in) in Form GST RFD-11. The step-by-step process is:

1. Login to GST portal → Navigate to Services → User Services → Furnish Letter of Undertaking (LUT)
2. Select the financial year for which LUT is being filed — for example, FY 2026-27 if the first export is planned in April 2026
3. Enter details of two witnesses — name, address, and occupation. These are not guarantors but merely witnesses to the undertaking
4. File using DSC or EVC — the LUT is signed by the authorised signatory of the registered person
5. Receive ARN — the system generates an Application Reference Number (ARN) confirming acceptance of the LUT

The LUT is valid for one financial year. If an exporter files the LUT in October 2026, it is valid from October 2026 to 31 March 2027. A fresh LUT must be filed before the first export of FY 2027-28. We strongly recommend filing the LUT in the first week of April each year to avoid inadvertent exports without a valid LUT.

Consequences of Non-Filing or Late Filing of LUT

If an exporter makes a zero-rated supply without a valid LUT on the date of supply, the supply cannot be treated as “export under LUT” and the exporter is required to pay IGST along with interest at 18% per annum. However, in the case of Amit Cotton Industries v. Principal Commissioner (Gujarat High Court, 2019), the Court held that a procedural lapse in LUT filing should not deny the substantive benefit of zero-rating. Nonetheless, we advise exporters not to rely on judicial relief when simple compliance — filing RFD-11 on time — avoids the issue entirely.

Revocation of LUT — Rule 96A(4)

The LUT facility can be revoked if the exporter fails to comply with the conditions of the LUT. Specifically:

• If the exporter fails to export goods within 3 months (extendable by 3 months by the Commissioner) from the date of issue of invoice
• If the exporter fails to pay the tax due along with interest within 15 days of the expiry of the time limit
• If the exporter is subsequently prosecuted for tax evasion exceeding ₹2.5 Crore

Upon revocation, the exporter must furnish a bond with bank guarantee in place of LUT. The bond amount is typically 15% of the bond value, although this varies by jurisdiction. Revocation of LUT is a significant compliance disruption and should be defended vigorously at the first stage itself.

Route 1: ITC Refund Under Rule 89 — Detailed Analysis

When to Use Rule 89

Rule 89 applies when the exporter chooses to export under LUT or bond without payment of IGST. The ITC on inputs and input services consumed in making the zero-rated supply accumulates in the electronic credit ledger, and the exporter claims refund of this accumulated ITC. Rule 89 is the preferred route for exporters with significant domestic procurement of inputs and input services where working capital preservation is a priority.

The Refund Formula — Rule 89(4)

The maximum refund amount is determined by the formula prescribed under Rule 89(4):

Common Errors in Rule 89(4) Computation

Based on our practice experience, the most frequent computation errors that lead to refund rejection or reduction are:

1. Inclusion of capital goods ITC in Net ITC: ITC on capital goods must be excluded from Net ITC for the purpose of Rule 89(4). Many exporters include the entire ITC balance without segregating capital goods ITC, resulting in an inflated refund claim that is reduced by the officer
2. Incorrect Adjusted Total Turnover: The definition of Adjusted Total Turnover was amended by Notification 14/2022 to align with the Supreme Court’s decision in VKC Footsteps. Exporters must ensure the denominator excludes exempt supply turnover other than zero-rated supply turnover
3. Mismatch between GSTR-1 Table 6A and RFD-01: The zero-rated turnover declared in RFD-01 must match the export turnover reported in Table 6A of GSTR-1. Any mismatch triggers a deficiency memo
4. Non-deduction of ITC reversed under Rule 42/43: If any ITC has been reversed on account of common credit apportionment (Rule 42) or capital goods apportionment (Rule 43), the reversed amount must be excluded from Net ITC
5. Inclusion of supplies made on payment of IGST: If the exporter has made some exports under LUT and some on payment of IGST in the same period, only the LUT exports should be included in the numerator of the Rule 89(4) formula

Filing Procedure — Form GST RFD-01

The refund application is filed electronically on the GST portal in Form GST RFD-01. The process involves:

1. Navigate to Services → Refunds → Application for Refund on the GST portal
2. Select the refund type — “Refund of ITC on account of Export of Goods/Services without payment of Tax”
3. Select the tax period — refund is claimed period-wise (monthly or quarterly depending on the taxpayer’s filing frequency)
4. System auto-populates turnover and ITC data from GSTR-1 and GSTR-3B — verify and correct any discrepancies
5. Upload supporting documents in Statement 3 — this includes invoices, shipping bills (for goods), BRC/FIRC (for services), and any other documents as prescribed
6. Self-declaration under Rule 89(2)(f) — declare that the applicant has not been prosecuted for tax evasion exceeding ₹2.5 Crore
7. File with DSC or EVC

Document Checklist for Rule 89 Refund

Document	Applicable To	Purpose
Tax invoices for zero-rated supplies	Goods & Services	Establishes the export transaction
Shipping bills / Bills of Export	Goods only	Proof that goods left India
BRC (Bank Realisation Certificate) / FIRC	Services only	Proof of foreign exchange receipt
GSTR-1 with Table 6A	Goods & Services	Export turnover declaration
GSTR-3B for the relevant period	Goods & Services	ITC claimed and output tax reported
Statement 3 (Rule 89(2)(c))	Services only	Invoice-wise details with FIRC linkage
Self-declaration under Rule 89(2)(f)	All	No prosecution for evasion > ₹2.5 Cr
SEZ endorsement (Form A1/A2)	SEZ supplies only	Confirmation of receipt by SEZ for authorised operations

Route 2: IGST Refund Under Rule 96 — Automatic Refund Mechanism

How Rule 96 Works

Under Rule 96, the exporter pays IGST on the export invoice at the applicable rate. The shipping bill filed with Customs serves as the refund application. The refund is processed through an automated system where data flows from the ICEGATE portal (Customs) to the GST portal. The IGST paid is credited directly to the exporter’s bank account without any manual intervention by the GST officer, provided there are no data mismatches.

Data Flow and Matching Process

The automated refund under Rule 96 depends on successful matching between three data sets:

1. GSTR-1 Table 6A: The exporter declares the invoice number, date, port code, shipping bill number, and IGST paid in Table 6A of GSTR-1
2. GSTR-3B Table 3.1(b): The exporter reports zero-rated outward supply with payment of tax in the summary return
3. Shipping bill data from ICEGATE: Customs transmits the shipping bill data — including the invoice number, shipping bill number, port code, and export general manifest (EGM) date — to the GST portal

When all three data sets match, the system generates Form GST RFD-06 (provisional refund order) and the refund is disbursed. When there is a mismatch, the refund is held and a Scroll Error report is generated.

Common Scroll Errors and Resolution

Error Code	Description	Resolution
SB001	Shipping bill not found in ICEGATE	Verify SB number in GSTR-1; file amendment if incorrect. Check with Customs for EGM filing by the shipping line
SB002	Invoice number mismatch	Invoice number in GSTR-1 must exactly match the invoice number in the shipping bill — including hyphens, slashes, and spaces
SB003	Port code mismatch	Verify port code in GSTR-1 against the actual port of export in the shipping bill
SB004	IGST amount mismatch	IGST declared in GSTR-1 must match IGST assessed in the shipping bill. File Table 9A amendment in subsequent GSTR-1
SB005	EGM not filed	Shipping line must file the Export General Manifest. Follow up with the shipping agent/carrier

Scroll errors are a major pain point for Indian exporters. In our experience, EGM non-filing (SB005) and invoice number mismatches (SB002) together account for over 60% of all Rule 96 refund blockages. We assist exporters with systematic reconciliation between GSTR-1, shipping bills, and ICEGATE records to identify and resolve mismatches before they block refunds.

Rule 96(10) — Restriction on IGST Refund

Rule 96(10) restricts IGST refund for exporters who receive certain duty exemption benefits on imports. Specifically, if the exporter has imported inputs under an Advance Authorisation, EPCG scheme, or EOU scheme and availed exemption from BCD and IGST on such imports, the exporter cannot claim refund of IGST paid on export to the extent of the duty-free import benefit. This provision was inserted to prevent “double benefit” — duty-free import and IGST refund on export. The provision was challenged in multiple High Courts and was subsequently relaxed through Notification 16/2020 (effective 23 March 2020), which restricts the prohibition only to cases where the exporter has availed exemption from IGST and compensation cess on imports.

Special Provisions for Service Exporters

Five Conditions for Export of Services — Section 2(6), IGST Act

For a supply to qualify as “export of services”, all five conditions must be satisfied simultaneously:

1. Supplier located in India: The supplier must be a registered person with a principal place of business in India
2. Recipient located outside India: The recipient must be located outside the taxable territory. Location is determined by the recipient’s place of business, not nationality
3. Place of supply outside India: This is determined by the place of supply rules under Sections 12 and 13 of the IGST Act. For B2B services, the place of supply is generally the location of the recipient
4. Payment in convertible foreign exchange or INR wherever permitted by RBI: The payment must be received in foreign exchange. With the RBI’s INR trade settlement framework (Circular dated 11 July 2022), payment in Indian rupees through special Vostro accounts is also acceptable
5. Supplier and recipient not merely establishments of the same person: A branch office and the head office are treated as establishments of the same person under Explanation 1 to Section 8 of the IGST Act. Supply between them is an inter-establishment transaction, not an export

BRC/FIRC Requirement for Service Export Refund

For ITC refund under Rule 89, service exporters must furnish a Bank Realisation Certificate (BRC) or Foreign Inward Remittance Certificate (FIRC) as proof of receipt of foreign exchange. Under Rule 89(2)(c), this is submitted as part of Statement 3. In practice, obtaining the BRC from the bank can take 15-45 days after the remittance is received. We recommend that service exporters request BRC from their bank immediately upon receipt of payment and maintain a BRC tracking register to ensure timely refund filing.

Intermediary Services — The Major Exclusion

“Intermediary” as defined in Section 2(13) of the IGST Act means a broker, agent, or any other person who arranges or facilitates the supply of goods or services between two or more persons but does not include a person who supplies such goods or services on his own account. Intermediary services are excluded from the export of services regime because the place of supply is determined as the location of the supplier (Section 13(8)(b) of IGST Act), making it a domestic supply even if the recipient is abroad. This classification has been the subject of extensive litigation, including the recent challenge in FIEO v. Union of India. IT/ITeS exporters must carefully evaluate whether their services qualify as intermediary or as independent supply to foreign clients.

Supplies to SEZ Units and Developers

Regulatory Framework

Supplies to SEZ units and developers are zero-rated under Section 16(1)(b) of the IGST Act. The procedure is governed by Rule 89(2)(d) of the CGST Rules, which requires the supplier to furnish endorsement from the specified officer of the SEZ confirming that the goods/services have been received by the SEZ unit for authorised operations. The key features are:

• The supplier (DTA unit) claims the refund — not the SEZ unit
• The supply must be for authorised operations of the SEZ, as defined in the SEZ Act, 2005
• For LUT route: refund is under Rule 89 with SEZ endorsement
• For IGST route: refund is under Rule 89 (not Rule 96) — the automatic refund mechanism under Rule 96 does not apply to SEZ supplies because there is no shipping bill
• The SEZ endorsement must be in Form A1 (for goods) or Form A2 (for services) as prescribed under the SEZ Rules

Refund Timeline and Interest on Delayed Refund

Statutory Timelines

Stage	Timeline	Authority
Acknowledgment of RFD-01	Within 15 days (RFD-02)	Proper officer
Deficiency memo if application incomplete	Within 15 days (RFD-03)	Proper officer
Provisional refund (90% of claimed amount)	Within 7 days of acknowledgment (RFD-04)	Proper officer — Section 54(6)
Final refund order	Within 60 days of RFD-01 filing (RFD-06)	Proper officer — Section 54(7)
Interest on delayed refund	After 60 days — 6% p.a. under Section 56	Automatic — must be claimed

Provisional Refund — Section 54(6)

Section 54(6) mandates that in the case of zero-rated supplies, the proper officer shall refund 90% of the claimed amount on a provisional basis within 7 days of the date of acknowledgment. This is a powerful provision designed to ensure that exporters receive their working capital without delay. However, in practice, provisional refund is often withheld if the officer has any doubt regarding the claim. If the provisional refund is not granted within the statutory timeline, the exporter can file a representation with the jurisdictional Commissioner or approach the High Court under Article 226 for a mandamus directing the officer to process the provisional refund.

Interest on Delayed Refund — Section 56

If the refund is not processed within 60 days from the date of receipt of the complete application, the applicant is entitled to interest at 6% per annum from the date immediately after the expiry of 60 days to the date of refund. This interest must be specifically claimed — it is not awarded automatically. We include the interest claim as a matter of standard practice in all refund applications and follow-up correspondence.

Refund Rejection: Grounds and Appeal Strategy

Common Grounds for Refund Rejection

Based on our extensive practice in GST refund matters, the most frequent grounds on which refund applications are rejected include:

1. Non-receipt of foreign exchange within the prescribed time: Under Rule 89(2)(c), the BRC/FIRC must be furnished. If payment has not been received before filing the refund, the application may be rejected. However, the Supreme Court in Amit Cotton Industries has held that receipt of foreign exchange is a condition that can be fulfilled subsequently
2. Mismatch between GSTR-1 and RFD-01: Any discrepancy in turnover figures between the two filings results in deficiency memo or rejection
3. ITC irregularities: If the supplier from whom ITC was availed is found to be non-existent or has not filed returns, the refund may be withheld under Rule 86A or rejected under Rule 89(4A)
4. Classification disputes: If the department disputes the classification of the supply as export (for example, classifying the service as intermediary), the entire refund can be rejected
5. LUT validity: Refund rejected if the supply was made without a valid LUT on the date of supply

Appeal Against Refund Rejection

A refund rejection order under Section 54 is appealable under Section 107 of the CGST Act before the Appellate Authority within 3 months from the date of the order. The pre-deposit is 10% of the disputed refund amount. Key points for the appeal:

• The appeal must challenge the specific findings in the rejection order — not general arguments
• Fresh evidence can be produced at the appellate stage if proper justification is given for not producing it earlier
• The Appellate Authority can remand the matter to the proper officer for fresh examination
• Simultaneously, the exporter can file a fresh refund application for subsequent periods — rejection of one period does not bar claims for other periods
• Further appeal lies to the GST Appellate Tribunal under Section 112

Export Compliance Calendar

Compliance	Due Date	Form / Reference
LUT renewal for new financial year	Before first export of the FY (recommended: 1-7 April)	Form GST RFD-11 / Rule 96A
GSTR-1 with export details (Table 6A)	11th of the following month	Table 6A of GSTR-1
GSTR-3B with zero-rated supply	20th of the following month	Table 3.1(b) of GSTR-3B
ITC refund application (Rule 89)	Within 2 years from relevant date	Form RFD-01
IGST payment if export not made within 3 months	15 days after expiry of 3-month period	Rule 96A(1)
BRC/FIRC collection (service exports)	Before filing refund application	Rule 89(2)(c)
ICEGATE reconciliation (goods exports, Rule 96)	Monthly — before scroll generation	Rule 96 / ICEGATE portal

Practical Case Studies

Case Study 1: IT Services Exporter — Intermediary Reclassification

An IT services company based in Bangalore exported software development services to a US parent company under LUT. The ITC refund claim of ₹1.8 Crore under Rule 89 was rejected by the jurisdictional officer on the ground that the services were “intermediary” in nature — the company was merely arranging the supply of manpower to the US parent and not providing independent services. We filed a Section 107 appeal demonstrating through the Master Service Agreement, work orders, project deliverables, and independent client invoicing that the company was providing services on its own account (not as a broker/agent), the company bore the commercial risk of delivery, and the company had its own intellectual property and methodology. The Appellate Authority allowed the appeal and directed sanction of the refund with 6% interest under Section 56.

Case Study 2: Goods Exporter — Scroll Error Resolution

A textile exporter in Coimbatore had ₹45 Lakh of IGST refund blocked for 8 months due to SB002 (invoice number mismatch) and SB005 (EGM not filed) scroll errors across 23 shipping bills. We conducted a line-by-line reconciliation, filed Table 9A amendments in GSTR-1 for invoice number corrections, coordinated with the shipping agent for EGM filing, and submitted a representation to the jurisdictional officer under Rule 96(3). The refund was processed within 30 days of resolution of all scroll errors.

GST Export Compliance Best Practices

1. LUT renewal: Set a calendar reminder for 1 April every year. File LUT in the first week of April — do not wait until the first export
2. Invoice numbering consistency: Use the same invoice number format in your ERP, GSTR-1, and shipping bill. Avoid special characters that may be interpreted differently across systems
3. Monthly reconciliation: Reconcile GSTR-1 Table 6A with shipping bill register (for goods) and BRC register (for services) before the GSTR-1 filing deadline
4. Maintain ITC register: Segregate ITC into input ITC, input service ITC, and capital goods ITC. Only the first two categories enter the Rule 89(4) formula
5. File refund promptly: Do not wait until the 2-year deadline approaches. File refund applications month-on-month or quarter-on-quarter to maintain cash flow
6. Track provisional refund: If the 90% provisional refund under Section 54(6) is not disbursed within 7 days of acknowledgment, escalate to the jurisdictional Commissioner
7. Claim interest: Always claim interest under Section 56 if the refund is delayed beyond 60 days. This must be a specific prayer in the application or follow-up letter
8. Engage specialist: Export GST compliance involves Customs law, foreign exchange regulations, and GST provisions simultaneously. A generalist accountant may miss critical compliance points that a specialist will address

Frequently Asked Questions

1. What is a Letter of Undertaking (LUT) under GST?

A LUT is a self-declaration filed by an exporter under Rule 96A of the CGST Rules in Form GST RFD-11, enabling exports without payment of IGST. It must be filed on the GST portal before making the first zero-rated supply of the financial year and is valid for one financial year. Any registered person who has not been prosecuted for tax evasion exceeding ₹2.5 Crore under the CGST Act or predecessor laws is eligible to furnish LUT. The filing requires details of two witnesses and is signed using DSC or EVC by the authorised signatory.

2. What is the time limit for claiming GST export refund?

Under Section 54(1) of the CGST Act, the refund application must be filed within 2 years from the “relevant date”. For goods exports, the relevant date is the date on which the ship or aircraft leaves India or the date on which goods pass the frontier. For services exports, the relevant date is the date of receipt of foreign exchange payment or the date of issue of invoice, whichever is later. We recommend filing refund applications on a monthly basis rather than waiting for the 2-year deadline.

3. What is the difference between IGST refund (Rule 96) and ITC refund (Rule 89)?

Under Rule 96, the exporter pays IGST on exports and the refund is processed automatically based on ICEGATE-GSTN data matching — faster processing but requires upfront IGST outflow. Under Rule 89, the exporter ships under LUT without IGST payment and claims refund of accumulated ITC through manual filing of RFD-01 with supporting documentation — preserves working capital but involves officer scrutiny and longer processing. The choice depends on the exporter’s cash flow position and risk appetite.

4. Can a SEZ unit claim GST refund?

The SEZ unit itself does not claim the refund. Supplies to SEZ units/developers are zero-rated under Section 16(1)(b) of the IGST Act, and the supplier (DTA unit) claims the refund. The supplier can use either the LUT route (ITC refund under Rule 89) or the IGST route (refund under Rule 89 — the automatic Rule 96 refund does not apply to SEZ supplies). The supply must be for authorised operations of the SEZ, endorsed by the specified officer of the SEZ in Form A1 or A2.

5. What happens if export is not completed within 3 months of invoice under LUT?

Under Rule 96A(1), the exporter must pay the IGST amount along with 18% interest within 15 days after expiry of the 3-month period. The Commissioner may extend this by a further 3 months on sufficient cause being shown. If the goods are subsequently exported, the exporter can claim refund of the IGST paid. If the LUT conditions are violated repeatedly, the LUT facility may be revoked under Rule 96A(4) and the exporter will be required to furnish a bond with bank guarantee.

6. How is the ITC refund amount calculated under Rule 89(4)?

The formula is: Refund Amount = (Turnover of zero-rated supply of goods + Turnover of zero-rated supply of services) / Adjusted Total Turnover × Net ITC. Net ITC includes only ITC on inputs and input services — capital goods ITC is excluded. Adjusted Total Turnover excludes exempt supply turnover other than zero-rated supply turnover. Errors in these components are the most frequent cause of refund reduction or rejection. We recommend maintaining a separate ITC register segregating input, input service, and capital goods credits.

7. What is the cost of GST export refund filing and LUT compliance?

At Virtual Auditor, our indicative fee structure is: LUT filing (annual) from ₹5,000; IGST refund assistance with ICEGATE reconciliation from ₹15,000; ITC refund under Rule 89 (RFD-01 preparation and filing) from ₹25,000; refund rejection appeal under Section 107 from ₹35,000; end-to-end export compliance retainer from ₹20,000 per month. Contact us for a case-specific assessment.

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