HSN Code: 9031

Use HSN code 9031 when raising GST invoices for Measuring or checking instruments. This code classifies the product under the Indian GST system and determines the applicable tax rate of 18%.

Who must mention HSN codes on invoices?

• Annual turnover above ₹5 crore: Must use 6-digit HSN codes
• Annual turnover ₹1.5 crore to ₹5 crore: Must use 4-digit HSN codes
• Annual turnover up to ₹1.5 crore: Optional (recommended for accuracy)

Mentioning the HSN code on invoices ensures proper GST compliance, simplifies return filing (GSTR-1, GSTR-3B), and helps buyers claim Input Tax Credit correctly.

You can verify the GST rate applicable to HSN 9031 using the WOWHOW GST Calculator or generate a compliant invoice using the GST Invoice Generator.