About HSN Code 8404

HSN Code 8404 covers Auxiliary Plant for Use with Boilers of Heading 8402 or 8403 (for Example, Economisers, Super Heaters, Soot Removers, Gas Recoverers), Condensers for Steam or Other Vapour Power Units 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 8404 on GST Invoices

• Include the HSN code 8404 on every GST invoice for auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economisers, super heaters, soot removers, gas recoverers), condensers for steam or other vapour power units
• 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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