GST invoices need an HSN code for goods or a SAC code for services. InvoiceInk keeps one on each line, and its AI can suggest the code and the rate from your description.
The Harmonised System of Nomenclature: an international code for goods, from 4 to 8 digits. Laptops and computers are 8471, for example.
The Services Accounting Code: India’s code for services, 6 digits starting with 99. IT design and development is 998314.
It depends on your aggregate turnover in the previous financial year. This is Notification 78/2020-Central Tax, in force since 1 April 2021.
| Turnover last year | Digits on your tax invoices |
|---|---|
| Up to ₹5 crore | 4 digits on invoices to registered customers (B2B). Optional on invoices to unregistered customers (B2C). |
| Above ₹5 crore | 6 digits on every tax invoice. |
A separately notified list of chemicals needs 8 digits whatever your turnover.
| SAC | Service |
|---|---|
| 998311 | Management consulting and management services |
| 998313 | IT consulting and support services |
| 998314 | IT design and development services |
| 998315 | Hosting and IT infrastructure provisioning services |
| 998316 | IT infrastructure and network management services |
Check the official list before relying on a code.
Add the HSN or SAC code to any line. It prints under the description on the PDF and on the invoice you share.
Ask for a suggestion and AI reads the line’s description, then proposes a code, a GST rate from your country’s rates and a one-line reason. Nothing saves until you do.
AI is off until an owner or admin turns it on in Settings. The description is sent to Anthropic, our AI provider, to make the suggestion.
Read the privacy policyIf your turnover last year was up to ₹5 crore, it’s optional on those (B2C) invoices and required on B2B ones. Above ₹5 crore, every tax invoice needs 6 digits.
Yes. It can misread a description or pick a code that’s close but not right. Treat it as a first draft and check it, especially for goods.
No. It keeps the code you type as it is. AI suggestions are limited to codes of 4 to 8 digits.
A summary written in November 2026. It isn’t tax advice: check the current rules or ask your CA.
Create your first invoice in under 60 seconds. No credit card required.
Start for Free →