GST LUT vs IGST Payment: Which Export Route Applies to Your Business?

When an Indian business starts exporting, one of the first GST decisions it has to make is simple to ask but important to get right: should you export under LUT without paying IGST, or pay IGST first and claim a refund later?

Exports are treated as zero-rated supplies under the GST framework. This gives eligible exporters two broad routes for exporting goods or services: export without payment of IGST under a Letter of Undertaking (LUT), or export on payment of IGST and subsequently claim refund of the tax paid. CBIC specifically recognises both routes.

The choice affects cash flow, working capital, refund requirements, documentation and day-to-day GST compliance.

For exporters in Delhi, Noida, Gurugram, Ghaziabad, Faridabad and other business hubs across India, understanding the difference between these two options can make export GST management considerably easier.

What Does Zero-Rated Supply Mean Under GST?

Before comparing LUT and IGST payment, it is important to understand the meaning of zero-rated supply.

Under the IGST framework, exports are treated as zero-rated supplies. This is different from an exempt supply.

The zero-rating mechanism is designed to ensure that eligible exports can leave India without the domestic GST burden ultimately becoming part of the export cost.

Broadly, an eligible exporter can choose between:

• Exporting under LUT without payment of IGST.

• Exporting on payment of IGST and claiming a refund of the IGST paid.

CBIC's guidance confirms these two routes for exports of goods and services.

This distinction is important because zero-rated does not simply mean that the exporter has no GST compliance. The exporter still has to correctly document the supply, report it in GST returns and satisfy the applicable conditions.

What Is LUT in GST?

LUT stands for Letter of Undertaking.

It allows an eligible registered person to export goods or services without payment of integrated tax, subject to the applicable GST provisions and conditions.

The LUT is furnished in FORM GST RFD-11 through the GST system. The GST taxpayer welcome material specifically lists furnishing LUT through RFD-11 as a GST portal facility.

Instead of charging IGST on the export invoice and paying that tax upfront, the exporter makes the export under LUT.

This can be particularly useful for businesses that regularly export and want to avoid blocking substantial working capital in IGST payments.

What Is Export With Payment of IGST?

Under the second route, the exporter charges and pays IGST on the export supply.

After the export is completed and the applicable conditions are met, the exporter can claim a refund of the IGST paid.

For example, suppose a Delhi-based exporter supplies goods worth ₹20 lakh to a customer outside India.

If the applicable IGST is ₹3.6 lakh, the exporter may make the export on payment of ₹3.6 lakh IGST and subsequently claim the eligible refund through the prescribed mechanism.

For goods, the export documentation and customs process play an important role in the refund mechanism. CBIC has explained that the shipping bill can serve as the application for refund of IGST paid on eligible exports, subject to the applicable requirements.

GST LUT vs IGST Payment: The Main Difference

The simplest comparison is:

The right choice depends on the nature of the business, its ITC position, export volume, working-capital requirements and refund process.

How Does Export Under LUT Work?

The LUT route is designed to allow eligible registered exporters to make zero-rated exports without paying IGST upfront.

A simplified process looks like this:

Step 1: Furnish LUT

The exporter furnishes the Letter of Undertaking through the prescribed GST portal mechanism.

Step 2: Receive the LUT Details

The exporter should retain the acknowledgement/reference details and ensure that the LUT is valid for the relevant period.

Step 3: Issue Export Invoice Correctly

The export invoice should contain the prescribed endorsement for supply meant for export under bond or LUT without payment of IGST. CBIC's invoice rules specifically provide the required export endorsement.

Step 4: Complete Export Formalities

The goods or services must satisfy the applicable conditions for being treated as exports.

Step 5: Report the Export

The transaction needs to be correctly reported in the applicable GST return.

Step 6: Claim Eligible ITC Refund Where Applicable

Where the exporter has accumulated eligible ITC because of zero-rated supplies made without payment of tax, a refund may be claimed subject to the applicable provisions and formula. CBIC's refund rules provide the framework for refund of unutilised ITC in such cases.

Who Usually Benefits From the LUT Route?

LUT can be particularly useful for exporters that have regular export turnover and significant input tax credit.

For example, consider a manufacturer in Noida that exports machinery every month.

The company regularly purchases:

• Raw materials

• Packaging material

• Professional services

• Freight-related services

• Business inputs

• Other taxable goods and services

GST accumulates on these purchases as eligible ITC.

If the company exports under LUT, it does not have to pay IGST on every export transaction merely to claim it back later.

Instead, subject to eligibility, the business can use the LUT route and claim refund of eligible accumulated ITC.

This can make a substantial difference to working capital.

When Can Paying IGST Be Useful?

Exporting with payment of IGST may also be appropriate depending on the business circumstances.

For example, a business may have relatively low accumulated ITC but significant export turnover.

Suppose a service exporter in Gurugram exports services worth ₹50 lakh but has relatively limited eligible input tax credit.

If the business chooses the IGST-payment route where legally available, it pays the applicable IGST and seeks refund through the applicable mechanism.

The economics and administrative burden should be evaluated before choosing the route.

The decision should not be based simply on the assumption that “LUT is always better.”

LUT Route and Input Tax Credit Refund

One of the most important differences between the two routes is the nature of the refund.

Under LUT, the exporter does not pay IGST on the export supply.

Instead, an exporter making zero-rated supplies without payment of tax may claim refund of eligible unutilised ITC, subject to the statutory conditions and prescribed formula. CBIC's refund rules specifically provide a formula for refund of unutilised ITC relating to zero-rated supplies made under LUT/bond.

This means that an exporter using LUT needs strong input-tax records.

The business should regularly reconcile:

• Purchase invoices

• GSTR-2B/available ITC records

• Electronic credit ledger

• Export invoices

• Shipping/export documents

• GSTR-1

• GSTR-3B

• Refund calculations

A mismatch in these records can delay or complicate the refund process.

LUT Is Not the Same as GST Exemption

This is an important misconception.

When a business exports under LUT, it is not simply making an exempt supply.

The export is zero-rated.

That distinction matters because the zero-rated framework permits eligible exporters to claim the relevant refund of accumulated ITC.

For example, a Delhi exporter buying taxable raw materials can generally retain the eligible ITC subject to the applicable conditions even though its outward export supply is made without payment of IGST under LUT.

Therefore:

LUT ≠ exemption from GST compliance.

It is a mechanism for making an eligible zero-rated supply without upfront payment of IGST.

What Happens If the Export Conditions Are Not Met?

The LUT route comes with obligations.

Rule 96A provides consequences where the prescribed conditions are not fulfilled.

For example, CBIC's clarification explains that where goods are not exported within the prescribed period after issuance of the export invoice, the exporter may become liable to pay the applicable tax along with interest, subject to the provisions and extensions permitted under the law. For services, the rule contains a separate period relating to receipt of payment in convertible foreign exchange, subject to the applicable provisions.

This is why exporters should not treat LUT as a document that can simply be filed and forgotten.

The actual export and payment conditions need to be monitored.

What Happens When Export Is Delayed?

Suppose a manufacturer in Ghaziabad issues an export invoice but the goods are not actually exported within the relevant Rule 96A period.

The exporter should review the consequences immediately instead of waiting until the return or refund stage.

Similarly, for export of services, the exporter needs to monitor the applicable foreign-exchange realisation requirement.

CBIC has also clarified that where goods have actually been exported but there are timing-related issues, the substantive zero-rating benefit should not automatically be denied merely because the export occurred after the stated period; the specific circumstances and applicable provisions need to be considered.

Therefore, delayed export situations should be reviewed transaction by transaction rather than handled through a blanket assumption.

What Should Be Mentioned on an Export Invoice?

Export invoices have specific requirements.

CBIC's invoice rules provide that an export invoice should carry the appropriate endorsement depending on whether the supply is made on payment of IGST or under bond/LUT without payment of IGST.

For an LUT export, the relevant endorsement is:

“SUPPLY MEANT FOR EXPORT UNDER BOND OR LETTER OF UNDERTAKING WITHOUT PAYMENT OF IGST.”

For an export with payment of IGST, the corresponding endorsement is:

“SUPPLY MEANT FOR EXPORT ON PAYMENT OF IGST.”

Businesses should ensure that their accounting or invoicing software generates the correct export document type and endorsement.

An incorrect invoice classification can create unnecessary problems during return filing and refund processing.

LUT vs IGST: A Practical Example for a Delhi Exporter

Consider ABC Exports, a Delhi-based manufacturer.

The company exports ₹1 crore of goods every year.

It also purchases substantial raw materials from Indian suppliers and accumulates eligible ITC.

Option 1: Export Under LUT

ABC exports goods without paying IGST.

Its advantages may include:

• No upfront IGST payment on exports

• Better working-capital management

• Eligibility to claim refund of accumulated eligible ITC

• No need to first pay IGST merely to seek its refund

However, the company needs to maintain strong ITC and export records.

Option 2: Export With IGST

ABC pays IGST on its export supplies.

It subsequently seeks refund of eligible IGST paid through the prescribed process.

This can result in a cash outflow before the refund is received.

If ABC has substantial export volume, the temporary cash blockage can become significant.

Example: Service Exporter in Gurugram

Now consider a software consultancy based in Gurugram providing services to clients in the United States.

The business has:

• Regular foreign clients

• Monthly export invoices

• Limited physical goods movement

• Significant recurring input services

• Regular foreign currency receipts

For this type of business, LUT may be attractive because the company can make eligible exports without charging IGST upfront, subject to fulfilling the export-of-services conditions.

For services, however, the business must pay close attention to the statutory definition of export of services and the applicable payment/realisation requirements.

A business should not assume that simply having a foreign customer automatically makes a transaction an export of service.

What Are the Conditions for Export of Services?

For a service to qualify as an export of services, the statutory conditions need to be satisfied.

Among other requirements, the supplier must be located in India and the recipient outside India, the place of supply must be outside India, payment must be received in convertible foreign exchange or as otherwise permitted under the applicable framework, and the supplier and recipient must not merely be establishments of the same distinct person, subject to the statutory wording and exceptions.

This is particularly important for:

• IT companies

• Software developers

• Consultants

• Digital marketing agencies

• Designers

• Architects

• Professional service providers

• BPO/KPO businesses

A GST consultant in Delhi or a professional handling export GST compliance should examine the complete transaction structure before treating an overseas service invoice as a zero-rated export.

Common Mistakes in LUT Exports

Businesses often understand the broad concept of LUT but make mistakes in execution.

Common problems include:

• Exporting without ensuring a valid LUT is in place.

• Using an incorrect export invoice endorsement.

• Failing to reconcile export invoices with shipping documents.

• Claiming excess ITC refund.

• Including ineligible ITC in the refund calculation.

• Not tracking export timelines.

• Ignoring foreign-exchange realisation requirements for services.

• Mismatch between GSTR-1 and GSTR-3B.

• Mismatch between export invoices and customs data.

• Incorrect shipping bill details.

• Not maintaining documentation supporting zero-rated supplies.

• Assuming every overseas customer transaction qualifies as an export of services.

• Failing to monitor refunds after filing the claim.

Common Mistakes When Exporting With IGST

The payment route also has its own risks.

Businesses may face issues such as:

• Incorrect IGST calculation.

• Wrong export invoice details.

• Incorrect reporting of export invoices.

• Mismatch between GST return and shipping bill data.

• Delayed refund because export documentation does not match.

• Incorrect bank or refund-related details.

• Failure to reconcile IGST paid with refund claimed.

• Treating the refund as automatic without checking the relevant conditions.

Paying IGST does not eliminate compliance. It simply changes the way the export and refund are handled.

Which Route Is Better for Working Capital?

For many regular exporters, LUT can be more attractive from a working-capital perspective because IGST is not paid upfront on the export supply.

Consider a business exporting ₹2 crore of goods with an applicable IGST liability of ₹36 lakh.

Under the IGST-payment route, ₹36 lakh could initially move out as tax before the eligible refund is received.

Under LUT, the business does not make that upfront IGST payment on the export supply.

For a business with tight cash flow, this difference can be significant.

However, the final decision should also consider the amount and nature of eligible ITC, refund processing, transaction profile and compliance requirements.

What Records Should an Exporter Maintain?

Whether the business uses LUT or pays IGST, proper records are essential.

An exporter should maintain and reconcile:

• Export invoices

• LUT acknowledgement/details, where applicable

• Purchase invoices

• ITC records

• GSTR-1

• GSTR-3B

• Shipping bills for goods exports

• Export general manifest/customs records where applicable

• Foreign inward remittance/payment records for services

• Bank statements and relevant certificates/documents

• Refund applications

• Refund acknowledgements

• Correspondence relating to refund queries

• Credit/debit notes relating to exports

A strong reconciliation process can identify errors before they affect a refund claim.

How Should a Business Choose Between LUT and IGST?

There is no single route that is automatically best for every exporter.

A business should evaluate:

Export Volume

Businesses with frequent and high-value exports may benefit significantly from avoiding upfront IGST payment.

ITC Position

If the business accumulates substantial eligible ITC, the LUT plus ITC refund mechanism may be worth evaluating.

Working Capital

Businesses that cannot comfortably block significant funds in GST may prefer the LUT route where eligible.

Refund Management

Businesses should consider whether they have the systems and documentation required to manage either ITC refunds or IGST refunds effectively.

Nature of Export

Goods and services have different documentation and operational considerations.

Foreign Payment Position

Service exporters need particular attention to the applicable payment/realisation conditions.

A Simple Decision Framework

A business can start with these questions:

Do we regularly export?

If yes, LUT may be worth considering for cash-flow efficiency.

Do we have substantial eligible ITC?

If yes, exporting under LUT and claiming eligible ITC refund may be relevant.

Can we comfortably pay IGST upfront?

If yes, the payment-and-refund route may also be evaluated.

Do our export documents reconcile correctly?

If not, the priority should be fixing the compliance process before selecting a refund route.

Are our service exports actually satisfying the export-of-services conditions?

If not, the transaction should be reviewed before treating it as zero-rated.

Final Takeaway

Both LUT and payment of IGST are recognised routes for eligible zero-rated exports.

The fundamental difference is straightforward:

LUT: Export without paying IGST upfront and, subject to the applicable provisions, claim refund of eligible accumulated ITC.

IGST Payment: Pay IGST on the export supply and claim the eligible refund of IGST paid through the applicable mechanism.

For many regular exporters, LUT can offer a significant working-capital advantage because tax does not have to be paid upfront on the export supply. But it also requires proper LUT compliance, export documentation, ITC records and monitoring of the applicable export conditions.

For businesses in Delhi, Noida, Gurugram, Ghaziabad and across Delhi NCR, the best route should be decided after looking at the actual export model, ITC position, cash flow and refund requirements rather than simply following what another exporter is doing.

Need Help With GST Export Compliance?

Export GST compliance involves more than choosing between LUT and IGST payment. Businesses also need to manage export invoices, GST returns, ITC reconciliation, refund documentation, shipping records and, for service exporters, foreign-payment documentation.

FilingSuvidha provides GST registration, GST return filing, tax consultancy, accounting, reconciliation and business compliance support for businesses across India.

Website: https://filingsuvidha.com/
Phone: +91-9625995981
Email: info@filingsuvidha.com

Our focus is on transparent pricing and on-time delivery.

Disclaimer

This article is intended for general informational purposes and should not be treated as legal, tax or professional advice. GST laws, rules, notifications, circulars, refund procedures and portal functionalities may change. Exporters should verify the provisions applicable to their specific transaction and seek professional advice wherever required.