HSN Summary is Mandatory in GSTR-1
In a significant update, the Goods and Services Tax Network (GSTN) has made it mandatory to furnish HSN-wise summary details in GSTR-1 for all registered taxpayers from 1st April 2024 onwards. This step is aimed at improving transparency, accuracy, and uniformity in GST return filing, data sharing, and overall tax compliance.
This move is expected to streamline the process of matching supplier and recipient data, enhance automation in return filing, and reduce mismatches and errors in claiming Input Tax Credit (ITC).
📜 Background: From Optional to Mandatory
Earlier, furnishing HSN (Harmonized System of Nomenclature) details in Form GSTR-1 was optional or selectively mandatory depending on the taxpayer’s aggregate turnover. For instance:
- Taxpayers with turnover up to ₹5 crore had the option to report only 2-digit or 4-digit HSN codes.
- Those with turnover above ₹5 crore were required to report 6-digit HSN codes.
However, this flexibility led to inconsistencies in data reporting and created challenges in the reconciliation of returns. Therefore, through Notification No. 78/2020 – Central Tax dated 15th October 2020, and various CBIC advisories, the government gradually moved towards stricter reporting norms.
Now, the GSTN has tightened the compliance rules further, making HSN reporting mandatory for all taxpayers, regardless of turnover.
🗓️ Effective Date of Implementation
The revised requirement applies to all GSTR-1 filings from April 2024 onwards.
That means any return for a period starting on or after 1st April 2024 must include the HSN-wise summary of outward supplies.
Non-compliance or incomplete reporting may result in rejection of returns or future notices from tax authorities.
🔑 Key Changes to Note
✅ 1. HSN Reporting is Mandatory for All
From April 2024, every taxpayer registered under GST, whether large or small, must furnish HSN-wise details of their outward supplies in GSTR-1.
The earlier relaxation for businesses with turnover below ₹5 crore has been withdrawn.
✅ 2. Minimum Number of Digits to Report
Depending on the taxpayer’s aggregate turnover, the minimum HSN digits to be reported are as follows:
| Aggregate Turnover | Minimum HSN Digits |
| Up to ₹5 crore | 4 digits |
| Above ₹5 crore | 6 digits |
This digit-level reporting is crucial for classification of goods/services and accurate tax calculation.
✅ 3. Mandatory Filing of Table 12 in GSTR-1
Table 12 of GSTR-1 must be properly filled with a detailed summary of outward supplies. The following details must be included for each HSN:
- HSN Code
- Description of Goods or Services
- UQC (Unit Quantity Code)
- Total Quantity
- Taxable Value
- Applicable Tax Rate (IGST, CGST, SGST)
This structure enables accurate processing of tax data and ensures consistency in return filing.
✅ 4. Auto-population in GSTR-2B and GSTR-3B
The HSN data entered in GSTR-1 will now be auto-populated in the GSTR-2B and GSTR-3B of the recipient. This helps ensure:
- Seamless data flow between supplier and buyer
- Automatic matching of Input Tax Credit (ITC)
- Less manual intervention and reduced risk of mismatch
This integration is part of the GSTN’s larger plan to automate and simplify the filing ecosystem.
✅ 5. Error Handling and Validations by GSTN
To maintain data accuracy, the GSTN has implemented real-time validation checks in the GSTR-1 filing process. If HSN data is:
- Missing
- Incorrect
- Incomplete
…then the return will be flagged or rejected, requiring correction before final submission.
⚠️ Business Impact: Be Prepared
This update increases the compliance burden on businesses, especially those that previously did not maintain HSN codes in detail.
🔹 ERP & Accounting Systems Must Be Updated
Ensure that your software is updated to capture and report the correct number of HSN digits and relevant details.
🔹 Staff Training is Crucial
Employees responsible for GST return filing must be trained on:
- Identifying correct HSN/SAC codes
- Updating product master data
- Filing Table 12 of GSTR-1 accurately
🔹 Risk of Penalties for Non-Compliance
According to Section 125 of the CGST Act, incorrect or non-reporting of HSN codes may attract a general penalty of up to ₹25,000.
📢 GSTN Advisory to Taxpayers
GSTN recommends the following steps to ensure error-free filing:
✅ Update master data of products/services with valid HSN/SAC codes
✅ Use GSTN-validated APIs or ERP integrations to check for errors
✅ Begin accurate HSN reporting with April 2024 return cycle
✅ Refer to the latest HSN Code Directory on the GST Portal
The mandatory HSN reporting rule is a step forward in strengthening GST compliance and data accuracy. While it may require some system updates and training initially, it will result in long-term benefits like faster ITC matching, reduced disputes, and improved reporting quality.
Don’t wait for the deadline—start updating your systems and training your team today to ensure a smooth and penalty-free transition into the new regime.