GST Rate of work contract

Based on the provisions of the GST law, here is the solution to the query regarding the GST rate and Input Tax Credit (ITC) eligibility for Sewage Treatment Plants (STP), Common Effluent Treatment Plants (CETP), and Effluent Water Recycling projects:

1. Applicable GST Rate

The standard GST rate for these projects is 18%, regardless of whether they are government or non-government contracts:

• Government Projects: Prior to July 18, 2022, works contracts for water supply, sewerage treatment, or effluent treatment plants awarded by the government or local authorities enjoyed a concessional rate of 12%. However, via Notification No. 03/2022-Central Tax (Rate), the government withdrew this concession.

• Non-Government / Private Projects: These have always attracted the standard rate of 18%.

• Subcontracts: A subcontractor executing a works contract for a main contractor must also charge 18% GST.

2. Input Tax Credit (ITC) Eligibility

The eligibility of ITC for works contracts depends on your role in the transaction under Section 17(5)(c) of the CGST Act:

• For the Subcontractor: You can claim full ITC on all your inputs, input services (like hiring machinery or purchasing materials), and capital goods used to execute the project.

• For the Main Contractor: Under Section 17(5)(c), ITC on works contract services is blocked unless it is used as an input service for further supply of a works contract. Since you are using the subcontractor's services to provide your own outward works contract service to the final client, you can fully claim the ITC on the GST charged to you by the subcontractor.

• For the End Client/Owner: Generally, ITC for the construction of immovable property is blocked for the end-user. However, Section 17(5) provides an exception for "Plant and Machinery." Since STPs, CETPs, and treatment pipelines are apparatus/machinery fixed to the earth used for business operations, the end client may claim ITC on the plant components, though the core civil structures remain blocked.

Summary

• GST Rate: 18% across the board for government projects, private projects, and subcontracts.

• ITC Availability: The main contractor can fully claim ITC on the invoice raised by the subcontractor, as it is an input service for a further works contract supply. The subcontractor can also claim ITC on their material and service procurements.