GST Rate for Water Supply Projects for Tamilnadu Water Supply Board
The Authority for Advance Ruling confirmed that services provided to the TWAD Board are taxable at 18% GST.
- Ruling
- Advance Ruling No. 13/AAR/2023 Dated: 06.06.2023
- Authority
- Authority for Advance Ruling
This page was written by Patron Accounting’s AI from the official release and reviewed before publishing. It explains the document in plain language. It is not the document itself. Where this page and the original differ, the original governs.
The short version
- The company asked if their water project services qualified for a lower tax rate.
- The Authority ruled the TWAD Board is a Governmental Authority, not a Local Authority.
- Services provided to the TWAD Board are subject to the standard 18% GST rate.
In short
The Indian Hume Pipe Company Limited asked the Authority for Advance Ruling (AAR) whether their construction services for the Tamilnadu Water Supply and Drainage (TWAD) Board qualified for a lower GST rate. The core issue was whether the TWAD Board counts as a 'Local Authority' under GST law, which would have allowed for a concessional tax rate. The Authority decided that the TWAD Board is a 'Governmental Authority' instead, meaning the lower rate does not apply.
What has changed
How it worked before
Businesses often assumed that various government-linked boards and agencies might qualify as Local Authorities for the purpose of claiming concessional GST rates on construction contracts.
What has changed
The ruling clarifies that the TWAD Board does not meet the legal definition of a Local Authority. Consequently, construction and maintenance services provided to them do not qualify for the lower tax rates reserved for Local Authorities and must be taxed at the standard 18% rate.
Who this affects
Construction companies and contractors providing services to government boards, corporations, or water supply agencies in India.
An example
Imagine a construction firm, BuildWell Infra, is working on a water pipeline project for a state-run irrigation board. They might wonder if they can charge a lower GST rate based on this ruling. Because this ruling is specific to the Indian Hume Pipe Company and the TWAD Board, BuildWell Infra cannot simply apply this logic to their own contract. They should consult a tax professional to determine if their specific client qualifies as a Local Authority or a Governmental Authority.
What you should do
If you provide similar services, review your contracts and tax filings to ensure you are applying the correct GST rate. Remember that an Advance Ruling is only binding on the business that requested it and its specific tax officer; it does not automatically change the law for your business.
If you do nothing
If you apply a lower tax rate based on an incorrect assumption, you risk a tax demand from the GST department. You may be required to pay the difference in tax, along with interest and potential penalties. Relying on a ruling that does not apply to your specific contract is not a valid defense during an audit.
The terms explained
- Local Authority
- A specific legal term for bodies like municipalities, panchayats, or district boards that have certain powers of self-governance.
- Governmental Authority
- An entity established by the government that carries out specific functions but does not have the full legal status of a Local Authority.
- Advance Ruling
- A formal decision provided by tax authorities to a business regarding how GST laws apply to their specific proposed or ongoing transactions.
The ruling in detail
Authority for Advance Ruling
The Indian Hume Pipe Company Limited
Advance Ruling No. 13/AAR/2023 Dated: 06.06.2023 · Tamil Nadu
Questions before the authority
- Whether the supply of services by the applicant to M/s Tamilnadu Water Supply and Drainage Board is covered by Notification No.15/2021-CT(Rate) dated 18.11.2021 r/w Notification No.22/2021-CT(Rate) dated 31.12.2021;
- If the supplies as per Question 1 are covered by the said Notification, then what is the applicable rate of Tax under Goods and Services Act, 2017 on such supplies; and
- In case if the supplies as per Question 1 are not covered by the said Notification then what is the applicable rate of tax on such supplies under the Goods and Services Act?
Facts
The applicant is engaged in construction and maintenance of water supply and sewerage projects for government bodies. They were awarded a contract by the Tamilnadu Water Supply and Drainage Board (TWAD Board) for a combined water supply scheme. The applicant sought a ruling on whether their services to the TWAD Board qualify for the concessional tax rate under specific notifications.
Ruling
| Question | What the authority ruled |
|---|---|
| Coverage under Notification No.15/2021-CT(Rate) | Not covered The supply is not covered by the specified notification. |
| Applicable rate if covered | Not applicable The question was rendered moot by the negative answer to question 1. |
| Applicable rate if not covered | 18% (CGST 9% and SGST 9%) Applicable with effect from 01.01.2022 under serial number 3(xii) of Notification No. 11/2017-CT(Rate). |
The Authority ruled that the services provided to the TWAD Board are not covered by the specified notifications. Consequently, the services are subject to GST at the rate of 18% (CGST 9% and SGST 9%) effective from 01.01.2022. The TWAD Board was determined to be a Governmental Authority rather than a Local Authority.
Reasoning
The Authority analyzed the definition of 'Local Authority' under Section 2(69) of the CGST Act and concluded that the TWAD Board does not qualify as one. It found the TWAD Board to be a 'Governmental Authority' as defined in the notifications. Because the relevant notifications restricted the lower tax rate to supplies made to the Central Government, State Government, Union Territory, or a Local Authority, the applicant's services to the TWAD Board were excluded. Therefore, the services fall under the residual category of construction services taxable at **18%**.
Provisions relied on
- Section 2(69) of the CGST Act, 2017
- Section 2(119) of the CGST Act, 2017
- Notification No. 11/2017-CT(Rate) dated 28.06.2017
- Notification No. 15/2021-CT(Rate) dated 18.11.2021
- Notification No. 22/2021-CT(Rate) dated 31.12.2021
For the practitioner
This ruling clarifies that the TWAD Board is a **Governmental Authority** and not a Local Authority for GST purposes. Practitioners should note that works contracts provided to such entities are not eligible for the concessional rates reserved for Local Authorities. It confirms that such services are taxable at the standard **18% rate**.
Source
This is a summary prepared from the published order, which is a scanned document. It is a reading aid and not the authority: where the two differ, the order governs. Verify every provision against the original before relying on it.
Original order: https://www.gstcouncil.gov.in/sites/default/files/AAR/13_aar_2023_indian_hume.pdf
Legibility of the scan, as read: high.
Prepared 20-10-2026.
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