HSN Code and GST Rate: Meaning and Structure

A GST rate is the percentage of tax applicable to a taxable supply of goods or services under India's Goods and Services Tax system. The rate depends on the relevant classification, the applicable government notification and any conditions or exemptions attached to the entry.

The GST Council recommends changes to GST rates within the statutory framework, and the applicable rates are given effect through government notifications. The revised rate structure introduced in September 2025 moved most goods and services towards 5% and 18% rates, with a 40% rate for specified luxury and sin goods. Nil-rated, exempt and other specified treatments also continue to apply where notified.

Businesses should check the applicable GST provisions and current rate notifications rather than assuming that every product in an HSN chapter attracts the same rate.

An HSN code classifies goods, while the GST rate identifies the tax percentage or treatment applicable to a supply. The code helps businesses locate the relevant tariff entry, but the rate must be confirmed against the applicable notification.

For accurate invoicing, businesses must use the correct classification and check the corresponding GST rate for the exact product. The classification alone is not sufficient to determine the final tax treatment.

The GST rate applicable to a product is linked to its precise HSN tariff entry and the relevant government notification, not simply to its chapter number. The following table summarises the main types of tax treatment businesses may encounter.

For example, HSN 4820 covers specified paper stationery products, while HSN 3926 covers certain other plastic articles. Their rates depend on the precise tariff description and any exclusions. Similarly, the GST treatment for HSN 4901 printed matter depends on the specific tariff entry.

Some supplies are nil-rated or exempt, but these terms are not interchangeable in every legal or compliance context. Businesses should confirm the applicable entry before calculating tax.

The HSN code helps identify the tariff entry used to check the GST rate, but an entire HSN chapter does not necessarily have one fixed rate. The applicable treatment depends on the exact product description, the relevant rate notification and any stated exclusions or conditions.

For example, the GST treatment for stationery under HSN 4820 can differ from that for notebooks or exercise books excluded from a particular tariff entry. Likewise, HSN 4901 should not automatically be treated as nil-rated for every type of printed matter.

The GST Council may recommend rate changes, which are implemented through government notifications. Always verify the current classification and rate through the official CBIC resources before issuing invoices.

Whether an HSN code must appear on a GST invoice, and how many digits are required, depends on the applicable invoicing rules, turnover threshold and type of supply. The general requirements introduced from 1 April 2021 distinguish between businesses with AATO up to Rs. 5 crore and those above that threshold.

These are general requirements; applicable exceptions, special instructions and reporting rules should be checked before relying on the table for a particular transaction. Export and customs documentation may require additional classification details, including an 8-digit tariff code where applicable.

Businesses should confirm the current invoice requirements and use the correct code for the relevant supply. A correct HSN code supports classification, but it does not replace the need to verify the GST rate.

The difference between HSN and SAC codes is that HSN classifies goods, while SAC classifies services under India's GST system. Both codes help businesses identify the appropriate classification for tax reporting and determine which GST rate entry to check.

Both systems help identify the relevant classification, but the applicable GST rate must be confirmed against the current notification and the precise nature of the supply. Businesses should not assume that all goods under one HSN or all services under one SAC attract a uniform rate.

The official GST portal provides an HSN/SAC search facility to help users find a classification using a product description or code. To find the correct HSN code and GST rate, follow these steps:

• Open the GST portal: Go to the portal and select Services, then User Services, followed by Search HSN Code.
• Enter the product details: Search using the product name or a known code. For example, enter 4901 to investigate the classification for printed books.
• Review the matches: Compare the returned descriptions and available code levels with the exact goods you sell.
• Check the GST rate: Review the relevant rate entry and any exclusions or conditions.
• Cross-check the notification: Confirm the applicable treatment against current CBIC rate notifications before invoicing.

You can also use the Bajaj Finance GST calculator to estimate tax amounts. A calculator helps with the calculation, but the correct classification and rate must be established first.

Businesses should also use the correct GST State Code when preparing relevant records and reporting transactions, particularly where the place of supply affects tax treatment.

Using a wrong HSN code can result in inaccurate invoices, incorrect tax calculations and questions from tax authorities. The consequences depend on the error, whether the applicable GST rate was affected and how the business corrects the discrepancy.

• Invoice discrepancies: An incorrect classification may require an invoice correction or other remedial action under the applicable rules.
• GST scrutiny or notice: A mismatch between the declared code, product description and tax rate may attract questions or scrutiny from tax authorities.
• Tax shortfall: If the wrong code leads to charging less GST than required, the supplier may need to pay the shortfall and address applicable interest or other consequences.
• Input tax credit issues: Incorrect invoice details may create compliance difficulties for the recipient. However, an HSN error does not automatically invalidate every input tax credit claim; eligibility depends on the applicable legal requirements and facts.
• Customs complications: An incorrect tariff classification in export or import documentation may lead to queries, delays or incorrect duty treatment.

Section 31 of the CGST Act sets out requirements for tax invoices, but the legal effect of an incorrect code depends on the circumstances. Businesses should correct errors promptly and retain supporting product descriptions and classification records.

HSN codes 4820, 3926 and 4901 cover different product categories, and each requires a check of the exact tariff description before applying a GST rate. The following examples show how to approach classification without assuming that every product under a heading receives identical treatment.

These examples are classification starting points, not substitutes for checking the applicable rate. Always confirm the current HSN code and GST rate against the relevant official notification before issuing an invoice.

Before applying a GST rate, businesses should confirm the exact product or service classification, the applicable notification and any conditions or exemptions. These checks help reduce avoidable invoice and reporting errors.

If you need funding for eligible business expenses, review the lender’s criteria before applying. check your business loan eligibility and make sure any repayments fit your cash flow.

Keep supporting product details and classification records so that the chosen code can be explained if a query arises. Do not rely solely on older invoices, saved spreadsheets or outdated articles because GST rates and notifications can change.

Correct classification supports the preparation of invoices and the reporting of supplies in GST returns. Businesses should reconcile their sales records, tax amounts and classification details before filing.

• GST returns: Report the required HSN/SAC details and other transaction information in the applicable return fields. 
• GST refunds: A refund depends on the applicable legal provisions and supporting documents, not simply on having an HSN code. 
• Composition scheme: Businesses using the GST Composition Scheme should check the scheme's separate eligibility, invoicing and compliance requirements.

The appropriate reporting and tax treatment depend on the taxpayer's circumstances and the type of supply. Consult a qualified tax professional where the classification or legal position is unclear.

Accurate HSN classification and current GST rates support compliance. If your business also needs funding for eligible operating expenses or growth, check your pre-approved business loan offer and review the final terms, charges, and repayment obligations before accepting an offer.

Bajaj Finance Business Loan offers funding from Rs. 2 lakh to Rs. 80 lakh, with repayment tenures from 12 to 96 months. The interest rates range from 14% to 23.50% p.a., and processing fees can be up to 4.72% of the loan amount, inclusive of applicable taxes. The loan is unsecured, so collateral is not required. 

Applicants need to be Indian nationals who are self-employed, have a business vintage of at least 3 years, a CIBIL score of 650 or higher, and be aged 21 to 80 years at the end of the loan tenure. Approval, the amount offered, rates, fees, and eligibility are subject to the lender’s assessment and applicable terms.