About HSN Code 8405

HSN Code 8405 covers Producer Gas or Water Gas Generators, with or Without Their Purifiers; Acetylene Gas Generators and Similar Water Process Gas Generators, with or Without Their Purifiers and attracts a GST rate of 18%. For intra-state supplies, this is split as 9% CGST + 9% SGST. For inter-state supplies, 18% IGST is charged.

How to Use HSN Code 8405 on GST Invoices

• Include the HSN code 8405 on every GST invoice for producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers
• Businesses with turnover above ₹5 crore must use 6-digit HSN codes
• Turnover between ₹1.5–5 crore: 4-digit codes are sufficient
• The HSN code must match the product/service description on your invoice
• Incorrect HSN codes can lead to GST notices and ITC mismatches

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