GST on TMT Steel: Complete Guide for Contractors and Builders
Everything contractors, homebuilders, and dealers need to know about GST on TMT steel — rates, HSN codes, ITC claims, invoicing requirements, and common compliance mistakes.
GST on TMT Steel at a Glance
- GST rate: 18% (CGST 9% + SGST 9%, or IGST 18% for inter-state)
- HSN code: 7214 (Bars and rods, hot-rolled, in irregularly wound coils, of iron or non-alloy steel) — specific codes below
- ITC available: Yes, for GST-registered buyers using steel in their business
Exact HSN Codes for TMT Bars
| Product | HSN Code | GST Rate |
|---|---|---|
| TMT bars (deformed, not further worked) | 7214 20 10 | 18% |
| TMT bars (other) | 7214 99 90 | 18% |
| Wire rod (used for stirrups) | 7213 91 00 | 18% |
Who Can Claim Input Tax Credit (ITC)?
ITC on TMT steel GST is available to:
- Registered contractors using steel for taxable construction services (commercial, industrial, infrastructure)
- Developers constructing commercial properties for sale (pre-completion sale attracts GST, ITC is available)
- Dealers buying steel for resale
- Manufacturers using steel as a raw material
Who cannot claim ITC:
- Individual homeowners building a personal residence (residential construction is not a GST-taxable output)
- Contractors working on government contracts that are exempt from GST
How Much ITC Are You Missing Without a GST Invoice?
On a 5MT purchase at ₹60,000/MT:
- Invoice value (base + GST): ₹3,00,000 base + ₹54,000 GST = ₹3,54,000
- If you are GST-registered and can claim ITC: effective cost = ₹3,00,000
- If you buy without GST invoice: you pay ₹3,54,000 with no recovery
- ITC benefit missed: ₹54,000 on 5MT
Invoice Requirements for ITC Eligibility
To claim ITC, your purchase invoice must contain:
- Supplier's GSTIN
- Your GSTIN (buyer)
- Invoice number and date
- HSN code (7214 series)
- Quantity (in MT) and description (brand, grade, diameter)
- Taxable value, GST rate, and GST amount (CGST + SGST or IGST)
- Place of supply (for inter-state: state name)
Common GST Compliance Mistakes
- Wrong HSN code on invoice: Using 7213 (wire rod) code for TMT bars — this can cause ITC mismatch in GSTR-2B reconciliation.
- Buying from unregistered suppliers: If a dealer's annual turnover is above ₹40 lakhs, GST registration is mandatory. Buying from an unregistered dealer above this threshold triggers Reverse Charge Mechanism (RCM) — the buyer must pay GST directly to the government.
- Not reconciling GSTR-2B: ITC is available only when your supplier files their GSTR-1 and the invoice reflects in your GSTR-2B. Always reconcile before claiming ITC.
- Claiming ITC on residential construction: Individual homeowners cannot claim ITC even if they have a GST invoice. This is a blocked credit under Section 17(5) of CGST Act.
Practical Checklist for Contractors
- Always buy from GST-registered dealers — check GSTIN on the GST portal.
- Ensure your GSTIN is on every purchase invoice.
- File GSTR-3B on time to preserve ITC claims.
- Reconcile purchase invoices with GSTR-2B monthly.
- Maintain physical copies of all MTCs, invoices, and weighbridge slips for at least 6 years.