Fabrication Work HSN/SAC Code & GST Rate – MS, Steel, Aluminium & Metal
Fabrication work HSN Code under GST can be confusing because the correct classification depends on what is being supplied, what the contract actually requires, who owns the materials, and whether the activity is job work or a works contract. A business that fabricates and sells a finished MS structure may need an HSN classification for goods. A business that performs fabrication on goods belonging to another registered person may be providing job work, for which a SAC under Heading 9988 is relevant. A contract involving fabrication and erection of an immovable structure can require a works-contract/construction-service classification instead. This distinction matters because the GST rate and documentation can differ. Fabrication Work HSN Code at a Glance Type of transaction Typical classification GST treatment Finished MS/steel structure supplied as goods HSN Heading 7308 18% Aluminium structures supplied as goods HSN Heading 7610 18% Structural metal product manufacturing service on qualifying job-work inputs SAC 998871 12% generally for qualifying job work Other fabricated metal product manufacturing / metal treatment service SAC 998873 12% when qualifying job work; otherwise rate can be 18% Structural steel erection service SAC 995455 18% generally, subject to the applicable construction entry Works contract involving fabrication/erection of immovable property Heading 9954 and applicable specific SAC 18% generally, subject to specified exceptions CBIC specifically lists iron/steel structures under heading 7308 at 18%, and aluminium structures under heading 7610 at 18%. The official services classification lists 998871 and 998873 separately, while the GST rate schedule distinguishes qualifying job work from other manufacturing services on physical inputs owned by others. CBIC GST Important: 998873 is a SAC (Services Accounting Code), not an HSN code. The exact HSN/SAC should be verified using the GST Portal’s current HSN/SAC search facility before issuing an invoice. What Is Fabrication Work Under GST? Fabrication generally involves processes such as: Examples include fabrication of: From a GST perspective, however, the word “fabrication” alone does not determine the classification. The same physical activity can fall into different GST classifications depending on the transaction. For example: Fabricate steel structure and sell it to customer → supply of goods Fabricate customer-owned steel as job work → supply of service Fabricate and erect a permanent steel structure as part of construction of immovable property → may be works contract/construction service Therefore, the first step should always be to understand the contract and the actual supply HSN vs SAC: Which One Should You Use? What is HSN? HSN stands for Harmonised System of Nomenclature. It is used primarily for classification of goods. Examples: 7308 – structures and parts of structures of iron or steel. 7610 – aluminium structures and parts of structures. CBIC’s GST FAQ specifically states that structures of iron or steel fall under heading 7308 and aluminium structures fall under heading 7610, with GST at 18%. CBIC GST What is SAC? SAC means Services Accounting Code. SAC is used for classification of services. Fabrication performed as a service can therefore require a SAC instead of an HSN. Examples include: These classifications come from the official Scheme of Classification of Services. Goods & Services Tax Council MS and Steel Fabrication HSN Code HSN 7308 for structural MS and steel goods HSN Heading 7308 covers structures and parts of structures made of iron or steel. The heading includes examples such as: CBIC’s GST rate FAQ states that iron or steel structures under heading 7308 attract 18% GST. CBIC GST Common examples A fabricator manufactures and supplies: The classification may fall under 7308, provided the finished product actually meets the scope of that heading. GST rate 18% GST is the current rate for heading 7308. CBIC GST Do not automatically use 7308 for every metal item merely because it was fabricated. The exact product should be checked against the tariff description. Other Iron and Steel Fabricated Products Not every fabricated steel item is necessarily a structural item under 7308. Some products may fall under other headings, such as 7326, depending on the nature of the article. Heading 7326 covers other articles of iron or steel. For example, a custom-made metal product that does not satisfy the description of a more specific heading may need to be considered under another heading such as 7326. Therefore: Fabrication process ≠ automatic HSN 7308. The finished product and its tariff description determine the goods classification. This is one reason why businesses should not simply copy the same HSN code onto every fabrication invoice. Aluminium Fabrication HSN Code Aluminium products are generally classified under Chapter 76. HSN 7610 Heading 7610 covers aluminium structures and parts of structures. This can include relevant products such as: CBIC’s GST FAQ specifically identifies 7610 for aluminium structures, with GST at 18%. CBIC GST Example An aluminium fabricator manufactures and supplies aluminium windows with frames. The transaction is a supply of goods, so an HSN under the applicable aluminium tariff heading is required. Where the product falls under 7610, the GST rate is 18%. CBIC GST Again, do not classify every aluminium product as 7610. Verify the actual product description. What Is SAC 998873? This is one of the most important sections of this article because “998873 HSN code” is a common search query, but 998873 is actually a SAC code. SAC 998873 The official Scheme of Classification of Services describes SAC 998873 as: Other fabricated metal product manufacturing and metal treatment services. The explanatory notes indicate that this category includes, among other things: Therefore, a webpage should not describe 998873 simply as “treatment and coating of metals and machining services.” That wording misses the broader official classification. SAC 998871 vs SAC 998873 These two codes are especially important for fabrication businesses. SAC 998871 Structural metal product, tank, reservoir and steam generator manufacturing services This is the more specific service classification for structural metal product manufacturing services. For example, work involving manufacturing of structural metal products may need to be considered under 998871 where the service classification fits. SAC 998873 Other fabricated metal product manufacturing and metal treatment services This is broader








