How to Find the Correct HSN Code for Your Product (2026 Guide)

With the introduction of the GST 2.0 structure in late 2025, getting your classification right is more crucial than ever. If you apply the wrong code to your product, you risk charging the wrong tax rate—which instantly invites penalties and notices from the tax department. For small business owners and freelancers, knowing how to confidently classify products and services is a non-negotiable skill.

This guide explains exactly what these codes are and shows you the fastest, most accurate way to find them.

What is HSN Code in GST?

HSN stands for Harmonized System of Nomenclature. It is an internationally recognized system used to classify goods. When you export or import goods, the customs department uses this code to understand exactly what is in the container.

Under Indian GST, the government uses HSN codes to assign tax rates to specific products. If you sell goods, you use an HSN code. If you sell services, you use a SAC (Services Accounting Code).

Every single invoice you generate must feature this code. If you file your GSTR-1 returns without it, the portal will throw an error, and your buyer will not get their Input Tax Credit (ITC).

Understanding 6 Digit vs 8 Digit HSN Codes

The HSN system is structured hierarchically. The more digits a code has, the more specific the product description is.

• 2 Digits (Chapter): Broad category (e.g., Chapter 61 is Articles of apparel).
• 4 Digits (Heading): More specific (e.g., 6109 is T-shirts, singlets and other vests).
• 6 Digits (Sub-heading): Highly specific (e.g., 610910 is Of cotton).
• 8 Digits (Tariff Item): The most granular level used mainly for import/export.

What do you need for domestic GST? As of 2026, businesses with an annual aggregate turnover of up to ₹5 crores in the preceding financial year must mention a minimum of 4-digit HSN codes on B2B invoices. Businesses with a turnover exceeding ₹5 crores must use 6-digit HSN codes on all invoices.

How to Find HSN Code: Step-by-Step

Finding the correct code used to require flipping through a massive PDF provided by the CBIC. Today, an HSN code search should take less than five seconds.

1. Identify the Core Product or Service: Strip away brand names. If you sell an “Apple iPhone 16,” your search term is “Mobile Phone.”
2. Use a Search Tool: Don’t rely on outdated Google results from 2023, as many items were reclassified during the GST 2.0 update.
3. Verify the Tax Rate: The HSN code determines the rate. Ensure the rate matches the new slabs (typically 5%, 18%, or 40%).

👉 Try it yourself: Instantly find your exact classification using our free HSN/SAC Lookup tool. It provides real-time client-side filtering without any lag.

How to Find SAC Code for Services

SAC (Services Accounting Code) works exactly like HSN but is exclusively for services. All SAC codes in India start with the number 99.

For example, if you are a freelance web developer, you provide “Information technology (IT) design and development services.”

• The SAC chapter for services is 99.
• The major group for IT services is 83.
• The specific code for IT design is 998314.

Under the new GST 2.0 structure, almost all services fall under the standard 18% GST slab.

Why Accuracy Matters More Than Ever

During the GST 2.0 transition in September 2025, the 12% and 28% slabs were removed. Thousands of goods were shifted to either the 18% standard rate or the 40% luxury rate.

If you copy an old invoice and use a pre-2025 classification that charged 12%, you will underpay your tax liability. During an audit, the assessing officer will demand the difference plus heavy interest. Once you know your correct tax rate, always ensure your final invoice math is flawless. Use our GST Calculator to properly split the CGST and SGST on your newly classified products.

Frequently Asked Questions

Is it mandatory to show HSN code on an invoice? Yes. For B2B invoices, HSN codes are mandatory regardless of turnover. For B2C invoices, they are mandatory if your turnover exceeds ₹5 crore.

What is the difference between HSN and SAC? HSN (Harmonized System of Nomenclature) is used to classify physical goods. SAC (Services Accounting Code) is used to classify services.

Can I use a 4-digit HSN code instead of 6 digits? If your previous year’s aggregate turnover was under ₹5 crore, you are only required to use a 4-digit HSN code for B2B supplies.

What happens if I use the wrong HSN code? Using the wrong code constitutes a misdeclaration. It can lead to the application of an incorrect tax rate, resulting in a penalty of ₹50,000 or the tax amount evaded, whichever is higher.

How do I find the HSN code for a completely new product? You must find the closest matching category based on the material the product is made from or its primary function. If in doubt, consult a tax professional or apply for an Advance Ruling.

Master Your Classifications

Don’t let the fear of incorrect tax rates hold your business back. By understanding how the HSN system works and utilizing modern tools, you can ensure 100% compliance on every invoice you generate.

(Read next: How to Calculate GST After GST 2.0: Step-by-Step Examples)