Installation Charges HSN Code
When a business bills for installing equipment, machinery, an air conditioner, CCTV or office systems, it needs to put the correct code and GST rate on the invoice. A common point of confusion is whether installation charges use an “HSN code” or a “SAC code”. The short answer: installation is a service, so it is classified under a SAC (Services Accounting Code), even though people commonly search for the “installation charges HSN code”. Most installation services fall under SAC 9987 (maintenance, repair and installation services) and attract 18% GST. This guide explains the correct code, the GST rate, and how to bill installation charges correctly.
HSN Code Benefits
Easy Tax Classification
HSN codes help classify products correctly, ensuring accurate GST rates and reducing tax-related errors.
Faster GST Compliance
Businesses can file GST returns more efficiently by using standardized product codes.
Reduced Errors
Using the correct HSN code minimizes mistakes in invoices, tax filings, and product reporting.
Smooth Trade
HSN codes are recognized globally, making domestic and international trade more organized.
Faster Customs Clearance
For exporters and importers, HSN codes help customs authorities identify products quickly, reducing delays.
Legal Compliance
Using the correct HSN code helps businesses comply with GST regulations and avoid penalties.
Quick overview
How to bill installation charges correctly
Decide
Decide whether the installation is a standalone service or part of a composite supply with goods
For a standalone service
For a standalone service, use SAC 9987 (or the specific 995461 / 998739 code that best fits the work).
Apply 18% GST
Apply 18% GST (9% CGST + 9% SGST for intra-state, or 18% IGST for inter-state), unless a specific notification gives a concessional rate.
Show the SAC code
Show the SAC code and GST rate clearly on the tax invoice.
Maintain documentation
Maintain documentation so your client can claim input tax credit and you stay audit-ready.
Decide
Decide whether the installation is a standalone service or part of a composite supply with goods
For a standalone service
For a standalone service, use SAC 9987 (or the specific 995461 / 998739 code that best fits the work).
Apply 18% GST
Apply 18% GST (9% CGST + 9% SGST for intra-state, or 18% IGST for inter-state), unless a specific notification gives a concessional rate.
Show the SAC code
Show the SAC code and GST rate clearly on the tax invoice.
Maintain documentation
Maintain documentation so your client can claim input tax credit and you stay audit-ready.
Installation charges HSN code and GST rate
FAQs
HSN code vs SAC code for installation charges
This is the first thing to get right. Under GST, goods are classified using HSN codes and services using SAC codes. Installation is a service, so it correctly uses a SAC code. The phrase “installation charges HSN code” is widely searched, but technically the code you put on the invoice for a pure installation service is a SAC. In practice, GST returns and invoices treat both under the “HSN/SAC” field, which is why the terms get used interchangeably.
If installation is bundled with the supply of goods (for example, you sell and install a machine as a single composite supply), the classification and rate may follow the principal supply, which could be the goods. Pure standalone installation charges, billed separately, are a service.
Why the correct code matters
Putting the wrong code or rate on installation charges causes real problems: your client’s input tax credit can be rejected, you can face a Section 61 scrutiny notice (see our separate guide on Section 61 of the CGST Act), and mismatches trigger GST notices. Using the right SAC and rate from the start avoids all of this.
Conclusion
The key takeaway on installation charges is simple: it is a service, it uses a SAC code (commonly 9987), and the GST rate is almost always 18%. Getting the code and rate right keeps your invoices clean, protects your clients’ input tax credit, and keeps you clear of GST scrutiny. If your business needs help with GST registration, invoicing, SAC/HSN classification or filing, StartupFlora’s GST team can set up your billing correctly and handle your monthly compliance.
Disclaimer
StartupFlora provides consultancy services only. We are not affiliated with any government department. All scheme benefits and approvals are at the sole discretion of the respective government authority and implementing agency.