A TMT bar quotation usually starts with the grade, diameter, quantity and price per tonne. GST adds another important element to the final purchase cost. For builders, it influences project estimates and material budgets. For dealers, it affects quotations, working capital, input tax credit and invoice management.
As of August 2026, the GST rate on steel TMT bars is generally 18%. The CBIC rate schedule places bars and rods of iron or non-alloy steel under HSN headings 7213 to 7215, with 9% central tax and 9% state tax.
This guide explains the GST rate, HSN classification, tax calculation, input tax credit, invoice requirements and transport documentation in simple terms.
What Is the GST Rate on Steel TMT Bars?
The applicable GST rate on standard steel TMT bars is 18%.
The way this 18% appears on the invoice depends on the location of the buyer and seller.
For example, a dealer in Gujarat selling TMT bars to a builder in Gujarat would generally charge 9% CGST and 9% SGST. A Gujarat dealer supplying the same material to a buyer in Rajasthan would generally charge 18% IGST.
The total tax remains 18% in both situations. The invoice presentation changes according to the place of supply.
Understanding the HSN Code for TMT Bars
HSN stands for Harmonised System of Nomenclature. It provides a standard classification system for goods and helps businesses report the correct tax rate on invoices and GST returns.
The CBIC GST rate schedule groups HSN headings 7213 to 7215 as bars and rods of iron or non-alloy steel. This category attracts 18% GST.
The precise HSN subheading can depend on factors such as:
- The form in which the steel is supplied
- The manufacturing or processing method
- The steel composition
- The level of fabrication
- Any specialised coating or treatment
The Fe grade and HSN classification serve different purposes. Grades such as Fe 500, Fe 500D and Fe 550 describe the mechanical properties of the TMT bar. The HSN code identifies the product for taxation.
Standard reinforcement bars usually fall within the 7213 to 7215 group. Specialised, coated, cut, bent or fabricated products benefit from a product-specific classification review.
GST Rates on Common Steel Products
Many steel products used in construction currently fall under the 18% GST slab. The HSN heading changes according to the type and form of steel.
| Steel product | Common HSN heading | GST rate |
| Ferrous waste and scrap | 7204 | 18% |
| Semi-finished iron or non-alloy steel products | 7207 | 18% |
| Flat-rolled iron or non-alloy steel products | 7208–7212 | 18% |
| TMT bars and other iron or non-alloy steel bars and rods | 7213–7215 | 18% |
| Steel angles, shapes and sections | 7216 | 18% |
| Iron or non-alloy steel wire | 7217 | 18% |
| Stainless steel bars and rods | 7221–7222 | 18% |
| Other alloy steel bars and rods | 7227–7228 | 18% |
| Steel tubes and pipes | 7304–7306 | 18% |
| Steel structures and parts of structures | 7308 | 18% |
The CBIC rate schedule currently places these common iron and steel categories in the 18% slab. Exact classification should follow the technical description of the material supplied.
How to Calculate GST on a TMT Bar Purchase
Consider a builder purchasing TMT bars with a taxable value of ₹5,00,000.
Example 1: Purchase within the same state
| Particular | Amount |
| Taxable value of TMT bars | ₹5,00,000 |
| CGST at 9% | ₹45,000 |
| SGST at 9% | ₹45,000 |
| Total GST | ₹90,000 |
| Final invoice value | ₹5,90,000 |
Example 2: Purchase from another state
| Particular | Amount |
| Taxable value of TMT bars | ₹5,00,000 |
| IGST at 18% | ₹90,000 |
| Final invoice value | ₹5,90,000 |
The final amount remains ₹5,90,000 in both examples. The tax heads change according to the transaction location.
How GST Affects the Price Per Kilogram
Steel quotations are often shared per kilogram or per tonne. Builders should confirm whether the quoted figure represents the base price or the GST-inclusive price.
Suppose a dealer quotes TMT bars at ₹60 per kg plus GST.
- Base price: ₹60 per kg
- GST at 18%: ₹10.80 per kg
- Price after GST: ₹70.80 per kg
For one tonne, which equals 1,000 kg:
- Base price: ₹60,000
- GST: ₹10,800
- Amount after GST: ₹70,800
Freight, loading, unloading and other commercial charges may affect the delivered cost depending on the supply arrangement.
Why the GST Treatment Matters for Builders
Steel forms a significant part of the structural material budget. Even a small difference in quotation format can create a sizeable difference across a large order.
For example, a quotation of ₹60 per kg plus GST has a different final value from a quotation of ₹60 per kg inclusive of GST. Clear separation of the base price and tax amount gives the project team a more accurate view of:
- Material cost
- Tax amount
- Delivered cost
- Cash-flow requirement
- Eligible input tax credit
- Project-wise expense allocation
Builders can also maintain separate records for each site or project. This helps the accounts and procurement teams connect purchase orders, invoices, delivery challans, e-way bills and material receipts.
How Input Tax Credit Works for Steel Dealers
A registered steel dealer can generally claim eligible input tax credit on business purchases when the conditions under Section 16 of the CGST Act are fulfilled. These conditions include appropriate tax documentation, receipt of goods and applicable return compliance.
Here is a simple example:
Dealer’s purchase
- Value of TMT bars purchased: ₹5,00,000
- GST paid at 18%: ₹90,000
Dealer’s sale
- Value of TMT bars sold: ₹6,00,000
- GST collected at 18%: ₹1,08,000
Illustrative GST position
- Output GST: ₹1,08,000
- Eligible input tax credit: ₹90,000
- Illustrative balance: ₹18,000
The dealer’s final GST position can also reflect other purchases, credits, debit notes, returns and adjustments during the tax period.
Proper invoices and purchase reconciliation make this process smoother.
Input Tax Credit Considerations for Builders
The input tax credit position of a builder can differ from that of a steel trader.
A steel dealer usually purchases TMT bars for resale. A builder may use the same bars as an input for constructing an immovable property, executing a works contract or supplying a taxable construction service.
The GST treatment can depend on:
- Type of project
- Nature of the outward supply
- Applicable real estate tax scheme
- Use of the building
- Works contract structure
- Blocked-credit provisions
- Project completion stage
Sections 16 and 17 of the CGST Act cover eligibility, apportionment and blocked credits. Builders should review the project-specific position before recording the GST amount as recoverable credit.
A GST professional can help classify the tax amount correctly as eligible credit, blocked credit or project cost.
CBIC invoice rules require key details such as supplier and recipient information, HSN code, description, quantity, taxable value, tax rate, tax amount and place of supply for inter-state transactions.
Builders and dealers may also connect the invoice with the purchase order, weighbridge slip, delivery challan and material test certificate for stronger procurement records.
Is an E-Way Bill Required for TMT Bars?
Steel consignments often carry a value above ₹50,000. The official E-Way Bill system states that an e-way bill is generally required for the movement of goods where the consignment value exceeds ₹50,000 in prescribed cases.
The e-way bill may be generated by:
- The supplier
- The recipient
- The transporter
The person generating it generally needs the invoice or delivery challan along with transporter or vehicle details.
Before dispatch, the parties should verify:
- Invoice number and date
- Buyer and seller GSTIN
- HSN code
- Taxable value
- Delivery location
- Vehicle number
- Transporter details
- Approximate distance
Applicable exemptions and state-specific notifications may also shape the requirement for a particular movement.
Five Practical GST Checks for Builders and Dealers
1. Confirm the quotation format
Ask whether the quoted TMT bar rate is exclusive or inclusive of GST. A written cost breakup brings clarity before the purchase order is released.
2. Match the HSN with the product
The product description, degree of processing and HSN code should align. Specialised products may require a closer classification review.
3. Verify the GSTIN
A correct supplier and buyer GSTIN helps the transaction flow accurately through invoices and GST records.
4. Match the invoice with the material received
The grade, diameter, quantity and weight mentioned on the invoice should match the delivery documents and physical material.
5. Maintain project-wise records
Separate purchase records for each site make budgeting, ITC review, vendor reconciliation and project costing easier.
GST Treatment Across Different TMT Grades
Standard grades such as Fe 500, Fe 500D, Fe 550 and Fe 550D generally attract the same 18% GST when they remain classified within the same HSN group.
The grade changes the strength, ductility and engineering suitability of the bar. The GST rate follows the tax classification of the product.
Coating, fabrication, cutting, bending and other value-added processes can influence the product description and classification. The supplier’s invoice should reflect the actual form in which the steel is supplied.
Choosing TMT Bars with Clear Commercial Documentation
Tax clarity forms one part of a well-managed steel purchase. The project team should also consider the required grade, diameter, quantity, application, delivery schedule and supporting quality documents.
ET TMT, part of the Electrotherm Group, offers a product portfolio that includes CRS TMT bars, refined steel TMT bars, superior-quality steel TMT bars, cut and bend bars and epoxy-coated TMT bars.
While requesting a quotation, builders and dealers can ask for a clear breakup covering:
- Product type and grade
- Diameter and quantity
- Base price
- HSN code
- GST rate
- Freight terms
- Delivery schedule
- Final invoice value
This approach keeps the engineering and commercial sides of procurement aligned.
Conclusion
The current GST rate on steel TMT bars is generally 18% under the HSN group covering iron and non-alloy steel bars and rods. A same-state transaction usually carries 9% CGST and 9% SGST, while an inter-state transaction carries 18% IGST.
For builders, clarity around the GST-inclusive cost supports better budgeting and project accounting. For dealers, accurate HSN classification, invoices, input tax credit records and e-way bills support smoother business operations.
A careful review of the quotation, invoice and project-specific ITC position can bring greater clarity to every TMT bar purchase.