When Law Meets Purpose - The Idea Behind Zero Rating
In the field of taxation, certain provisions are designed purely to generate revenue, while others are structured to support larger economic objectives. The treatment of supplies to Special Economic Zones (SEZs) clearly falls into the latter category. Under the GST framework, such supplies are not kept outside the tax system; rather, they are deliberately placed within it, in a manner that ensures the tax burden does not ultimately arise. This reflects a nuanced legislative approach, where taxation is applied in form but neutralised in substance.
This approach is rooted in the broader economic role assigned to SEZs. These zones are not merely designated areas within the country; they function as gateways for international trade, encouraging exports, attracting investment, and promoting industrial growth. If domestic taxes were to become a cost for supplies made to SEZ units, the very objective of creating such zones would stand diluted.
The concept of zero rating ensures continuity of credit, a distinction examined in detail later.Unlike exemption, zero rating preserves Input Tax Credit (ITC) and prevents tax from becoming a cost. In this way, the law achieves a balance- it maintains the integrity of the GST system while preventing any tax burden from attaching to export-linked activities.
Thus, the treatment of supplies to SEZ units is not an exception to GST, but a reflection of its deeper design. The law recognises that taxation must not hinder economic growth, particularly in areas linked with international trade. By ensuring that tax is not a cost, zero rating serves as a bridge between domestic taxation and global competitiveness, aligning legal structure with economic purpose.
SEZs - Where Domestic Law Treats Supply as Export
The starting point for understanding the GST treatment of supplies to SEZ units lies in the Special Economic Zones Act, 2005. Under Section 53 of this Act, a Special Economic Zone is deemed to be a territory outside the customs territory of India, but only for the limited purpose of authorised operations. In simple terms, this means that although an SEZ is physically located within India, the law treats it differently for trade and taxation purposes. As a result, supplies made to an SEZ unit are not treated the same as supplies made within the domestic tariff area, but are treated in accordance with export-oriented treatment.
This legal position is not merely theoretical; it directly influences how taxes are applied. When a supplier provides goods or services to an SEZ unit, the transaction is treated, in effect, as connected with exports. This ensures that domestic taxes do not become a cost for businesses operating within SEZs, thereby supporting their role in international trade. The concept, therefore, is not about changing geography, but about recognising the economic function of SEZs.
The strength of this framework is further reinforced by Section 51 of the SEZ Act, which provides that its provisions will prevail over other laws in case of inconsistency. This overriding effect ensures that, whenever there is a conflict between GST provisions and SEZ law, the latter prevails. In practical terms, this means that GST must operate in a manner that respects and supports the special status granted to SEZs under the SEZ legislation.
From Domestic Supply to Export Equivalence - How GST Reclassifies SEZ Transactions
The GST law does not treat supplies to SEZ units as ordinary transactions merely because they originate within India. Instead, it consciously reclassifies them through a statutory mechanism that aligns such supplies with exports. This reclassification is anchored in Section 16(1) of the IGST Act, 2017, which designates supplies to SEZ Developers and SEZ Units as zero-rated supplies. The significance of this provision lies in its ability to alter the tax character of the transaction without changing its physical nature.
This treatment is further supported by Section 7(5)(b) of the IGST Act, 2017, which deems such supplies to be inter-State supplies, irrespective of the location of the supplier and recipient. This deeming provision ensures that the transaction falls within the IGST framework, thereby enabling the operation of zero-rating provisions. In effect, the law creates a structured pathway for bringing supplies to SEZ units within GST while simultaneously positioning them for tax-neutral treatment.
It is important to appreciate that this reclassification does not mean that supplies to SEZ units are identical to exports in a strict legal sense. For instance, they may not satisfy all the statutory conditions prescribed for "export of services" under Section 2(6) of the IGST Act, particularly those relating to receipt of consideration in foreign exchange.
Beyond Appearances - Why Zero-Rated is Not Exempt
At a superficial level, zero-rated supplies and exempt supplies may appear similar, as both result in no tax being payable on the outward supply. However, this similarity is only apparent and does not reflect the true legal position. The GST framework draws a clear and deliberate distinction between the two, recognising that the economic consequences of each are different. This distinction is not merely classificatory but is central to the functioning of GST as a value-added tax.
The statutory basis for this distinction lies in Section 16(2) of the IGST Act, 2017 , which permits the availment of input tax credit for zero-rated supplies without restriction. This provision ensures that the credit chain remains uninterrupted, allowing the supplier to fully recover the tax paid on inputs and input services, thereby preserving the principle of tax neutrality.
In contrast, the treatment of exempt supplies is governed by the combined operation of Sections 2(47) and 17(2) of the CGST Act, 2017, which require the proportionate reversal of ITC attributable to such supplies. However, for the specific purpose of determining the value of exempt supply for such reversal, reliance is not placed on the definition contained in Section 2(47). Instead, the value is required to be computed in accordance with the explanation appended to Section 17(3) of the CGST Act, 2017, which provides a distinct and expanded framework for identifying and valuing exempt supplies in the context of ITC apportionment.
The consequence of this statutory design is that exempt supplies effectively remove the transaction from the credit mechanism, thereby embedding tax into the cost structure. Zero-rated supplies, on the other hand, retain the transaction within the GST chain while neutralising the tax burden. This ensures that taxes paid at earlier stages do not accumulate, thereby preserving the fundamental principle of GST as a non-cascading tax.
Zero rating retains the transaction within GST while neutralising tax burden, unlike exemption, which breaks the credit chain. The distinction, therefore, lies not in the absence of tax, but in the manner in which the law deals with ITC- making zero rating a mechanism of neutrality, while exemption remains a mechanism of relief.
From Identity to Intent - The "Authorised Operations" Test Redefining Zero Rating
The treatment of supplies to SEZ units under GST underwent a significant transformation with the amendment to Section 16(1)(b) of the IGST Act, 2017, effective from 01.10.2023. Prior to this amendment, the law largely adopted a status-based approach, where the mere fact that the recipient was an SEZ unit or developer was sufficient to confer zero-rated status. The statutory language did not expressly require an examination of the purpose for which the supply was made, and accordingly, the scope of zero rating was relatively broad.
The amendment introduces a clear and substantive condition- that the supply must be made for authorised operations of the SEZ unit or developer. This marks a decisive shift from identity to intent. It is no longer sufficient to establish the recipient's identity; the supplier must now demonstrate how the supply is connected to the SEZ entity's approved activities. In effect, the law shifts from a formal to a functional test, requiring closer alignment between the supply and the economic purpose of the SEZ framework.
This change has important practical implications. Suppliers must now ensure that their invoices and supporting documents are backed by appropriate endorsements or approvals from SEZ authorities, evidencing that the services or goods are used for authorised operations. The compliance burden, therefore, is no longer procedural alone but becomes substantively linked to eligibility.
Prospective Operation of Amendments - Certainty Over Retrospective Disruption
Whenever a statutory amendment introduces a new condition that alters the scope of eligibility, the question naturally arises whether such a change applies to past transactions or only to future ones. As a general principle, unless the legislature clearly provides otherwise, amendments that impose new conditions or restrictions are treated as prospective in nature, particularly when they affect substantive rights rather than procedural aspects.
This principle assumes particular relevance in the context of the amendment to Section 16 of the IGST Act, 2017, which introduced the requirement of "authorised operations" with effect from 01.10.2023. The amendment narrows the scope of zero-rated supplies by introducing an additional condition, and therefore cannot be regarded as merely clarificatory. It materially changes the eligibility criteria, and consequently, its application must be confined to supplies made on or after the date on which the amendment came into force.
The rationale behind this approach lies in the need for certainty and fairness in taxation. If subsequent amendments were applied retrospectively to deny benefits that were otherwise available, it would create uncertainty and undermine legitimate expectations. Tax statutes, therefore, are interpreted in a manner that avoids such retrospective disruption unless expressly mandated by the legislature.
This position finds prima facie judicial support in ICICI Lombard General Insurance Co. Ltd. v. Union of India (2026-VIL-311-BOM), where the Hon’ble Bombay High Court stayed recovery proceedings based on the retrospective application of the amended provision. The Court observed that the condition introduced with effect from 01.10.2023 could not be applied to earlier transactions, thereby reinforcing the principle that amendments affecting substantive rights operate prospectively. The decision underscores a settled tenet of tax jurisprudence- that certainty must prevail over retrospective imposition of burdens.
From Dual Pathways to a Single Route - The Recasting of Section 16(3)
A major structural change in the law governing zero-rated supplies has been brought about by the substitution of Section 16(3) of the IGST Act, 2017, effective from 01.10.2023. Under the earlier framework, a supplier had the flexibility to either supply without payment of integrated tax under a bond or Letter of Undertaking, or to supply on payment of IGST and subsequently claim a refund. This dual-option mechanism offered commercial flexibility but also led to administrative complexities, particularly in the processing of refunds.
The amended provision marks a clear departure from this approach by prescribing a single primary method- supply without payment of integrated tax under a bond or Letter of Undertaking. The option to pay IGST as a matter of choice has been deliberately withdrawn. The statutory design now directs all zero-rated supplies to a uniform procedural route, thereby reducing compliance variability and increasing system consistency.
The rationale behind this shift lies in the need to streamline the refund mechanism and minimise upfront outflow of revenue. Under the earlier regime, payment of IGST followed by a refund often led to delays, verification issues, and working capital implications for both taxpayers and the administration. By requiring supplies to be made without payment of tax, the law seeks to eliminate the refund of output tax at the initial stage, thereby simplifying the process and reducing administrative burden. However, it is important to note that while the method has changed, the underlying principle remains intact.
Statutory Flexibility within Section 16 - The Notified IGST Route under Section
The restructuring of zero-rated supplies under GST does not end with the substitution of Section 16(3) of the IGST Act, 2017. While that provision establishes the primary mechanism of supply without payment of integrated tax under a bond or Letter of Undertaking, the legislature has simultaneously introduced a calibrated flexibility through Section 16(4) of the IGST Act, 2017, effective from 01.10.2023. This provision empowers the Government to specify certain classes of persons and supplies that may still adopt the route of payment of IGST with a subsequent claim for refund, thereby ensuring that the earlier flexibility is not entirely eliminated but is retained in a controlled manner.
The significance of Section 16(4) lies in its enabling character. It does not grant a general option to all taxpayers, but authorises the Government to selectively permit the IGST payment route through notifications. The law thus creates a structured hierarchy- Section 16(3) lays down the primary provision, while Section 16(4) operates as a carefully carved exception.
In exercise of this power, the Government has issued Notification No. 01/2023 - Integrated Tax dated 31.07.2023 (as amended vide N. N0. 05/2023-Integrated Tax), which adopts an exclusionary approach by identifying certain goods- primarily tobacco and related products- that cannot be exported on payment of IGST. By implication, goods falling outside this restricted list may be exported on payment of integrated tax with a corresponding claim for refund.
The combined effect of these provisions is that the law achieves a balance between control and flexibility. While the default expectation is supply without payment of tax under Section 16(3), Section 16(4) ensures that the IGST-payment route remains available in specified cases, subject to clearly defined conditions.
Substance Prevails Over Procedure - Judicial Reinforcement of Zero-Rating Benefits
In the administration of GST, the interaction between statutory requirements and practical realities often brings procedural compliance into sharp focus. Documentation, endorsements, and prescribed formalities play an important role in establishing eligibility; however, these requirements are intended to facilitate the law's implementation, not to defeat its purpose. Where the substantive conditions of a transaction are met, an overly rigid application of procedural norms may yield results inconsistent with legislative intent.
This distinction becomes particularly significant in the context of zero-rated supplies to SEZ units, where the law aims to ensure that tax does not become a cost. If procedural lapses- such as delays or minor deficiencies in endorsements- are treated as grounds for denial of benefit, the very purpose of zero rating would stand undermined. The law, therefore, must be applied in a manner that preserves the substantive entitlement while ensuring reasonable compliance with prescribed procedures.
This principle has received judicial affirmation in Lenovo (India) Pvt. Ltd. v. Commissioner of GST (Appeals), Chennai (2023-VIL-799-MAD), where the Madras High Court held that the refund of IGST paid on supplies to SEZ units cannot be denied merely on procedural grounds when the fact of supply is not in dispute.
Where Tax Retains Form but Relinquishes Burden - The Evolving Balance in SEZ Supplies
The treatment of supplies to SEZ units under GST strikes a balance between taxation and economic purpose. These supplies remain within the GST system, but, under Section 16 of the IGST Act, 2017, the tax does not become a cost. In simple terms, GST applies in form but not in burden. The recent changes have made the process more structured and disciplined while continuing to ensure that export-linked supplies remain tax-neutral.
The amendments effective from 01.10.2023 have made the system more structured and disciplined. Through changes in Section 16(3) of the IGST Act, 2017 and the insertion of Section 16(4) of the IGST Act, 2017, the basic objective of zero rating remains the same. The changes only regulate the process, making it more consistent and efficient.
"GST does not withdraw from SEZ supplies; it simply ensures that where exports begin, taxation no longer imposes a cost."
By: CA Raj Jaggi and Kirti Jaggi, Assistant Professor, Asian Law College
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