What Is the HSN Code for TMT Bars? GST Rate and Compliance Guide

Key Takeaways 

• The correct TMT bar HSN code is 7214, specifically 7214 20 00 for deformed bars and rods of iron or non-alloy steel used in concrete reinforcement
• What is HSN code, the Harmonised System of Nomenclature is an internationally standardised product classification system used in India's GST framework to categorise goods and determine applicable tax rates
• The TMT bar HSN code and GST rate, TMT bars attract 18% GST under HSN 7214, applicable on all supply transactions across the construction steel value chain
• HSN code for TMT bars must be correctly quoted on every GST invoice, e-way bill, and GST return, incorrect classification leads to input tax credit rejection and attracts penalty under the CGST Act, 2017
• Steel bar HSN code 7214 covers hot-rolled deformed bars including Fe 415, Fe 500, Fe 500D, Fe 550D, and Fe 600 grade TMT bars used in RCC construction
• Construction steel HSN code requirements extend beyond TMT bars, different steel products attract different HSN codes; always verify the specific code for each product category
• Why HSN code is required, mandatory for all GST-registered businesses; turnover above ₹5 crore requires 6-digit HSN; turnover above ₹1.5 crore requires 4-digit HSN; turnover below ₹1.5 crore is exempt
• Sourcing from reliable TMT bar suppliers who provide correctly classified GST invoices with accurate HSN TMT bar codes is essential for seamless input tax credit claims throughout the supply chain

Introduction 

India's construction industry operates within one of the most complex regulatory environments in the world, and the GST compliance requirements around steel procurement are among the most frequently misunderstood aspects of that environment. For construction companies, steel dealers, fabricators, and contractors, every TMT bar purchase transaction generates a GST invoice, and every GST invoice must carry the correct HSN code for TMT bars for the transaction to be compliant, the input tax credit to be claimable, and the business to remain in good standing with tax authorities.

Yet despite its importance, TMT bar HSN code classification is frequently treated as an afterthought, an administrative detail delegated to accounts teams without ensuring that the classification is actually correct. The consequences of this approach have become more visible since the GST Council began cross-referencing invoice data through the GSTN platform, generating automated notices for HSN mismatches that create genuine compliance and financial risk for businesses across the construction steel supply chain.

What Is HSN Code? 

What is HSN code in precise terms? The Harmonised System of Nomenclature (HSN) is a globally standardised product classification system developed by the World Customs Organisation (WCO), used by over 200 countries to systematically classify traded goods. India adopted the HSN system for GST classification in 2017, using it to:

• Uniformly categorise goods across all states and union territories
• Determine the applicable GST rate for each product category
• Enable automated tax compliance verification through the GSTN platform
• Facilitate international trade documentation and customs clearance

HSN Code Structure 

An HSN code is a numerical code of 2, 4, 6, or 8 digits, each additional digit providing greater specificity of classification:

• 2-digit chapter code: Broad product category (e.g., Chapter 72 — Iron and Steel)
• 4-digit heading code: More specific product group (e.g., 7214 — Bars and rods of iron or non-alloy steel)
• 6-digit subheading code: Specific product variant (e.g., 7214 20 — Deformed bars and rods)
• 8-digit tariff code: Most granular classification, used for customs and export documentation

Importance of HSN Code in GST 

The importance of HSN code in GST compliance cannot be overstated for construction steel businesses:

• Mandatory invoice disclosure: Every GST invoice must carry the correct HSN code, businesses with turnover above ₹5 crore must use 6-digit HSN; above ₹1.5 crore must use 4-digit HSN
• GST return filing: HSN-wise summary of outward supplies must be reported in GSTR-1, incorrect HSN codes create filing discrepancies
• Input tax credit eligibility: The buyer's ITC claim is linked to the HSN code on the supplier's invoice, a mismatch between the claimed HSN and the actual product category can result in ITC rejection during scrutiny
• E-way bill generation: The TMT bar HSN code must be correctly entered during e-way bill generation for consignments above ₹50,000, incorrect HSN on e-way bills creates legal risk during goods-in-transit inspection

HSN Code for TMT Bars: The Complete Classification 

Primary TMT Bar HSN Code

The correct HSN code for TMT bars falls under Chapter 72 of the HSN schedule, Iron and Steel:

• Chapter 72: Iron and Steel
• Heading 7214: Other bars and rods of iron or non-alloy steel, not further worked than forged, hot-rolled, hot-drawn, or hot-extruded, but including those twisted after rolling
• Subheading 7214 20: Containing indentations, ribs, grooves, or other deformations produced during the rolling process

The complete TMT bar HSN code is therefore 7214 20 00, the 8-digit classification specifically covering deformed reinforcement bars of the type used in RCC construction across India.

HSN TMT Bar Classification in Practice

For most GST compliance purposes, the HSN TMT bar code used on invoices and GST returns is the 4-digit heading 7214, adequate for businesses with turnover below ₹5 crore. Businesses above the ₹5 crore turnover threshold must use the 6-digit subheading 7214 20 on all invoices.

Steel Bar HSN Code for Related Products

The steel bar HSN code framework covers several related products that are frequently confused or incorrectly classified alongside TMT bars:

TMT Bar HSN Code and GST Rate 

 Applicable GST Rate

The TMT bar HSN code and GST rate, TMT bars classified under HSN 7214 attract 18% GST, comprising:

• CGST: 9% (Central Goods and Services Tax)
• SGST: 9% (State Goods and Services Tax) for intra-state transactions
• IGST: 18% (Integrated Goods and Services Tax) for inter-state transactions

GST Rate History and Current Status

The 18% GST rate on TMT bars has remained stable since the GST Council's initial rate setting in 2017, no rate revision has been made to construction steel HSN code 7214 in subsequent GST Council meetings through 2025.

GST Calculation on TMT Bar Purchases

For a construction company purchasing TMT bars worth ₹10,00,000 from a supplier in the same state:

• Basic value: ₹10,00,000
• CGST @ 9%: ₹90,000
• SGST @ 9%: ₹90,000
• Total invoice value: ₹11,80,000
• ITC available: ₹1,80,000 (claimable against output GST liability)

For an inter-state purchase of equivalent value:

• IGST @ 18%: ₹1,80,000
• Total invoice value: ₹11,80,000
• ITC available: ₹1,80,000 (claimable against IGST, CGST, or SGST output liability in the specified order)

Why HSN Code Is Required: Compliance Consequences of Incorrect Classification 

Why HSN code is required to be accurate, and what happens when it is not, is the most practically important question for construction industry procurement and accounts teams:

Consequences of Incorrect HSN Classification

•   ITC rejection: If the HSN code on a purchase invoice does not match the product's correct classification, the buyer's ITC claim can be rejected during GST audit or GSTN automated scrutiny, resulting in the tax amount becoming an outright cost

• GST notice and penalty: Incorrect HSN classification on outward supply invoices triggers GST notices, penalties under Section 122 of the CGST Act can reach ₹10,000 per invoice or the tax amount involved, whichever is higher

• E-way bill non-compliance: Incorrect HSN TMT bar code on e-way bills exposes goods-in-transit to detention by GST enforcement authorities, causing project delays and additional compliance costs

• GSTR-1 mismatch: HSN summary discrepancies in GSTR-1 filing generate automated system alerts that require rectification, creating additional compliance burden and potential scrutiny.

Common HSN Classification Errors in the Steel Industry

•  Classifying TMT bars under 7213 (wire rod), a frequent error that attracts the same 18% rate but creates classification mismatch notices

• Using plain bar HSN (7214 10) for deformed TMT bars (7214 20), a subheading error that is increasingly flagged by GSTN automated systems

• Classifying structural steel sections (HSN 7216) under TMT bar codes, a significant misclassification that can attract penalty and ITC disallowance
   

Sree Metaliks: GST-Compliant TMT Bar Suppliers

At Sree Metaliks, we understand that GST compliance is as important to our customers as product quality, and thus we treat it with the same rigour. As trusted TMT bar suppliers across eastern India, every Sree Metaliks invoice carries the correct TMT bar HSN code (7214 20 00), accurately stated GST rate, and complete transaction documentation that supports seamless ITC claims for our customers.

Our accounts and dispatch teams are trained on the current HSN classification framework and GST compliance requirements, ensuring that every TMT bar supply transaction, from invoice generation through e-way bill issuance, meets the full requirements of India's GST regulatory framework. When you source TMT bars from Sree Metaliks, you receive not just quality steel, you receive the documentation integrity that protects your business's GST compliance position at every step of the supply chain.

Conclusion

The TMT bar HSN code, 7214 20 00 for deformed reinforcement bars under India's GST framework, is a small detail with large compliance consequences. Understanding what is HSN code, applying the correct HSN code for TMT bars on every invoice and GST return, and sourcing from TMT bar suppliers who maintain consistent HSN compliance are the three pillars of a sound GST compliance strategy for any business in India's construction steel supply chain.

The importance of HSN code in GST compliance extends beyond regulatory obligation, correct HSN classification protects ITC claims, prevents penalty exposure, and ensures the seamless flow of tax credits that keeps construction project cash flows healthy and predictable.

For more information, please reach out to us at: Sales@sreemetaliks.com