Construction and property

GST invoice format for a fire-fighting and fire alarm contractor

A fire-fighting contractor's GST invoice should list each system separately: hydrant and sprinkler piping by diameter and length, pumps by capacity and head, fire alarm panels and detectors by zone, and portable extinguishers by type and capacity. Fire alarm installation falls under SAC 995461 and other fire-protection installation under 995468, taxed at 18% as works contracts. Extinguishers under HSN 8424, fire pumps under 8413 and alarm panels under 8531 are each 18% when sold separately. Print the fire NOC reference on the completion invoice.

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Sample fire-fighting and fire alarm contractor invoice

Description	HSN/SAC	Qty	Rate (₹)	Taxable (₹)	GST
Fire hydrant system: heavy-class MS piping 100 mm with valves, installed and pressure tested (composite)	995468	220 RMT	2,650.00	5,83,000.00	18%
Addressable fire alarm system: panel, detectors and hooters, installed for 4 zones (composite)	995461	1 SET	3,85,000.00	3,85,000.00	18%
Electric fire pump 2280 LPM at 70 m head with motor	8413	1 NOS	4,10,000.00	4,10,000.00	18%
ABC dry powder fire extinguisher 6 kg, ISI marked	8424	20 NOS	2,100.00	42,000.00	18%
Conventional fire alarm control panel, 8 zone	8531	1 NOS	24,000.00	24,000.00	18%
Taxable value				₹14,44,000.00
GST (CGST + SGST, or IGST if inter-state)				₹2,59,920.00
Invoice total				₹17,03,920.00

Sample prices are illustrative. Check the GST rate for your exact item or service before billing.

Extra fields a fire-fighting and fire alarm contractor invoice needs

System and zone: Hydrant, sprinkler, alarm and suppression systems are tested and approved separately. Billing by system and zone helps the fire officer and the building owner match invoices to the approved fire plan.
Pipe diameter, schedule and length: Fire mains use heavy-class MS or GI pipes of specified schedules. Recording diameter, class and length supports the quantity and the hydraulic design.
Pump capacity and head: Main electric, diesel and jockey pumps are specified by flow and head. Listing these with serial numbers is essential for maintenance and audits.
Extinguisher type and refill due date: ABC powder, CO2 and foam extinguishers have different uses and refill cycles. Printing type, capacity and next refill date makes the invoice a compliance record.
Fire NOC or approval reference: Occupancy depends on a fire NOC. Quoting the application or NOC number on the final invoice links your work to the approval.
Hydraulic test and commissioning: Pressure tests and commissioning trials prove the system works. Referencing test reports on the invoice documents that the system was handed over in working order.

Standard GST invoice fields

Rule 46 of the CGST Rules applies to every tax invoice, including this one:

Supplier name, address and GSTIN
Consecutive invoice number (max 16 characters, unique for the year)
Date of issue
Customer name, address and GSTIN (if registered)
Place of supply with state name
HSN/SAC code per item
Description, quantity and unit
Taxable value after discounts
GST rate and CGST + SGST or IGST amounts
Signature or digital signature

GST rules that matter for a fire-fighting and fire alarm contractor

Installation services and codes

The SAC annexure includes fire alarm installation within 995461, electrical installation services including fire alarm and burglar alarm installation. Hydrant and sprinkler piping systems are commonly billed under 995468, other installation services, or under the plumbing code where they are part of the water supply network. When the contractor supplies pipes, pumps and devices and installs them in the building, the contract is a works contract taxed at 18%.

Equipment rates after September 2025

Notification 9/2025 lists mechanical appliances for projecting or spraying liquids, including fire extinguishers whether or not charged, under 8424 in Schedule II at 18%. Power-driven pumps for handling water under 8413 are at 18%, as are electric sound and visual signalling apparatus such as fire alarm panels under 8531, and MS and GI tubes under 7306. The Schedule I entry for 'sprinklers; drip irrigation system' at 5% sits alongside agricultural irrigation equipment; fire sprinkler heads should be classified carefully before any concession is applied.

Refilling and maintenance of extinguishers

Refilling an extinguisher is a service under maintenance and repair codes at 18%, even if fresh powder or CO2 is consumed. Annual maintenance contracts for fire systems are also at 18%. Show the refill date and next due date on the invoice; many buildings use your bills as their compliance register during fire audits.

Credit for the building owner

Fire systems installed in a commercial building are part of its services. Section 17(5)(c) and (d) block credit on works contracts and goods used for construction of immovable property on own account, though portable extinguishers, which are movable, are generally eligible for credit where used for business. Invoicing portable items separately helps business clients claim what they are entitled to.

Government buildings and TDS

Hospitals, schools and offices owned by Government often award fire-safety contracts. For contracts above ₹2.5 lakh, the department deducts 2% GST TDS. Include the department's GSTIN for TDS on the invoice and reconcile GSTR-7A credits.

E-way bills for pumps and pipes

Fire pumps and pipe bundles moving to site usually exceed ₹50,000 and need an e-way bill, whether sold or moved under your own works contract on a delivery challan.

Common billing mistakes

Applying the 5% irrigation sprinkler rate to fire sprinkler systems without checking classification.
Billing portable extinguishers inside the works contract lump sum, blocking the client's eligible credit.
Raising refill invoices without type, capacity and next due date, so they are useless for fire audits.
Leaving out pump serial numbers and test reports from the completion invoice.

Fire-fighting and fire alarm contractor GST invoice: FAQ

What SAC code is used for fire alarm installation?

Fire alarm installation falls under 995461, electrical installation services including fire alarm and burglar alarm systems. Other fire-protection installations can be billed under 995468.

What is the GST on fire extinguishers?

Fire extinguishers under HSN 8424 are taxed at 18%, whether or not charged.

Is GST charged on extinguisher refilling?

Yes, refilling is a maintenance service at 18%, including the refilled medium.

What HSN applies to fire pumps?

Power-driven water pumps under HSN 8413 are taxed at 18%.

Can a business claim GST credit on fire safety installation?

Credit is blocked for works contracts forming part of immovable property built on own account. Portable extinguishers, being movable, are usually eligible for credit when used in business.

Should the fire NOC number be on the invoice?

GST law does not require it, but builders and occupiers use your completion invoice as part of the fire approval file. Printing the NOC application or approval number, with the test report reference, links the payment to an approved, working system and speeds up the final payment.

Sources: CBIC — Notification 9/2025-Central Tax (Rate), 17 Sep 2025 · ICAI IDTC — Notification 9/2025-Integrated Tax (Rate) as corrected 18 Sep 2025 · CBIC — Scheme of Classification of Services (SAC annexure)

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