HSN 8405: Generators for producer or water gas with or without…

HSN code 8405 covers: Generators for producer or water gas with or without their purifiers acetylene gas generators and similar water process gas generators, with or without their purifiers.

The GST rate for this code depends on the specific item (per CBIC Notification 9/2025-Central Tax (Rate), effective 22 Sep 2025). The official schedule lists:

• 5% — Following renewable energy devices and parts for their manufacture:- (a) Bio-gas plant; (b) Solar power-based devices;
• 18% — Parts suitable for use solely or principally with fixed Speed Diesel Engines of power not exceeding 15HP
• 18% — 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

Pick the line that matches what you're billing.

Rates reflect the 22 Sep 2025 GST 2.0 reform (mainly 5% and 18%, with 3% for precious metals and 28%/40% for select sin and luxury goods). This is a reference drawn from the CBIC rate schedule, not tax advice — confirm the exact rate for your specific item with your CA.