What is an HSN code in GST?

HSN stands for Harmonized System of Nomenclature - a 6-digit international product classification code developed by the World Customs Organization. In India's GST system, HSN codes are mandatory on tax invoices to classify goods and determine the applicable GST rate.

Is HSN code mandatory for GST invoicing in India?

Yes. Turnover above Rs 5 crore requires 6-digit HSN. Turnover between Rs 1.5-5 crore requires 4-digit HSN. Turnover below Rs 1.5 crore requires 2-digit HSN (optional but recommended). Exporters must use 8-digit HSN codes.

How many digits should my HSN code be?

Most Indian businesses use 6-digit HSN codes. Businesses above Rs 5 crore turnover must use 6-digit codes. Those between Rs 1.5-5 crore use 4-digit codes. Exporters must use 8-digit HSN codes for customs.

What is the difference between HSN code and SAC code?

HSN (Harmonized System of Nomenclature) codes are used for GOODS in GST invoices. SAC (Services Accounting Code) codes are used for SERVICES. Both are 6-digit codes but apply to different transaction types.

What are the GST rates in India?

India has 6 GST rate slabs: 0% (exempt - fresh vegetables, books), 3% (gold, silver, diamonds), 5% (essential items - LPG, medicines), 12% (standard - processed foods), 18% (most common - electronics, software), 28% (luxury - cars, tobacco, aerated drinks).

How do I find the correct HSN code for my product?

Use the free search at hsnlookup.com. Type the product name (e.g. laptop, cotton fabric, rice) or the HSN code digits. The tool searches 13,900+ codes and shows classification, GST rate and chapter details instantly.

What happens if I use the wrong HSN code?

Using an incorrect HSN code can attract penalties, demands for differential GST, and complications during GST audits. Always verify with CBIC or a qualified CA before issuing invoices.

Can GST rates change for HSN codes?

Yes. GST rates are revised by the GST Council periodically. Always verify the current applicable rate with the official CBIC website or a CA before invoicing.

HSN Code 39031990 - POLYMERS OF STYRENE, IN PRIMARY FORMS - POLYSTYRENE: OTHER: OTHER

GST rate: 18%. Chapter 39: Plastics & Polymers.

GST Rate Details for HSN 39031990

HSN 39031990 attracts 18% GST, the most common rate in India, applicable to most manufactured goods.

How to Use HSN Code 39031990 on GST Invoices

Apply IGST 18% for interstate supplies, or CGST 9% + SGST 9% for intrastate supplies.

Products Under This Code

39, 39031990, 18%, gst18, polymers, styrene, primary, forms, polystyrene, other.