GST on labour supply is not the same tax question as GST on a works contract, and the difference costs contractors real money. A labour-only contract falls outside the works contract definition because no goods pass from you to the client. What it becomes instead is an ordinary supply of services — and the taxable value is the whole bill, wages included, not the margin you thought you were charging on top.

GST on labour supply starts where the works contract test ends

Section 2(119) of the CGST Act defines a works contract by two things together: the kind of work, and the transfer of property in goods in executing it. The same test decides GST on works contract, and when its answer is no, the contract lands here. This is what sits on the other side of that line.

If the client issues cement, steel and shuttering and you bring workers, a supervisor and nothing else, no goods move from you. The contract is not a works contract however much of the site you are running. It is a supply of services, and it is taxed on that footing.

That reclassification is not academic. It changes what your invoice has to show, it changes where the client’s input credit sits, and it changes the base the tax is charged on.

The taxable value is the whole bill, not the margin

This is where most labour contractors lose money, and the two provisions that decide it are short enough to read.

Section 15(1) says the value of a supply is the transaction value, which it defines as the price actually paid or payable for the supply, where supplier and recipient are not related and the price is the sole consideration. Section 15(2)(b) then adds to the value any amount that the supplier is liable to pay in relation to the supply but which the recipient has incurred and which is not in the price.

Read those together against a typical manpower bill. You are the employer of those workers. Their wages are your liability, arising from the supply you are making. So the wage bill is part of the value whether you show it as a separate line, describe it as reimbursement, or bill it at cost.

Line on your manpower bill In the taxable value? Why
Wages of the workers you employ Yes Your liability, arising from the supply
Your service charge or margin Yes Part of the price for the supply
PF and ESI you are liable to remit Yes Section 15(2) pulls in amounts you are liable to pay
A cess or fee under another law, billed separately Yes Section 15(2)(a) includes other-law levies charged separately
Interest or a late fee you charge for delayed payment Yes Section 15(2)(d) names it specifically
A discount recorded on the invoice at the time of supply No Section 15(3) excludes it

Contractors who have run the PF and ESI arithmetic for a site crew already know the wage bill dwarfs the margin. On a contract where you charge 8% over cost, treating the other 92% as outside the tax is not a rounding error, it is the whole exposure.

There are narrow routes in the CGST Rules by which an amount a supplier incurs purely on someone else’s behalf stays out of the value. They carry strict conditions on how the arrangement is documented and billed. Have your tax adviser check the current text against your actual contract rather than assuming a reimbursement line on the invoice does the job on its own.

Why the wage bill fails the pure agent test

The route people have in mind is Rule 33 of the CGST Rules, the pure agent rule. It keeps an amount out of the value only if all three of its conditions hold: you pay a third party on the client’s authorisation, the payment is shown separately on your invoice, and what you procured from that third party is in addition to the services you supply on your own account. The rule’s own Explanation adds that a pure agent holds no title to what it procures, does not use it for its own interest, and recovers only the actual amount spent.

Wages do not fit that wording. The workers are your employees and their labour is the very service you are selling, so it is not a supply procured from a third party in addition to your own, and the wage is your liability as their employer rather than a payment you make to someone else on the client’s authorisation. A genuine pure agent item on a manpower contract looks different: a fee or third-party bill the client asked you to pay for it, passed on at the actual amount and shown separately. Get your adviser’s view on any line you plan to keep out of the value.

What decides whether you are supplying labour or executing work

The label on the work order settles nothing. What the department looks at is who the workers answer to, who directs the job day to day, who carries the risk if it is done badly, and whether any material passes from you.

A contract where you are paid per head per day, the client’s engineer tells those workers what to do, and the client owns every bag of cement, is labour supply whatever it is called. A contract where you are paid against measured quantities and you bring some of the material is a works contract. Free-issue material sits between the two and is worth reading up on separately under GST on free issue material, because material the client issues never becomes yours and so never transfers from you.

Owners who run both models in the same month should bill them separately. A single invoice mixing the two makes the classification argument for the department.

Supplying labour is also a licensed activity once the headcount crosses the statutory line, which labour licence for contractors sets out under the new labour code.

The rate, and where to look it up

The CGST Act sets the machinery for charging tax but not the rate. The rate lives in a rate notification, it differs by the classification of the service and the recipient, and it has changed more than once. A figure typed into an article a year ago and copied into a bid today is how a contractor ends up funding the difference out of margin.

So look it up fresh each time. The Central Board of Indirect Taxes and Customs keeps a GST rates page for goods and services, which now sends you on to its tax information portal where the current rate notifications sit, and your tax adviser can confirm the entry that matches your contract. If you are near the registration threshold, the GST registration limit for contractors decides when you have to be in the system at all.

Security guards are the one reverse-charge exception

One kind of manpower is taxed the other way round. Since 1 January 2019, security services, meaning the supply of security personnel, provided by anyone other than a body corporate to a registered person sit on the reverse charge list at serial number 14 of Notification No. 13/2017-Central Tax (Rate), so the client pays the tax instead of the agency. The entry carves out government bodies registered only to deduct tax at source and composition taxpayers. Ordinary labour or manpower supply has no such entry, so the contractor charges the tax on the bill.

GST on labour supply to a government department or municipality

One exemption matters to labour contractors working for the public sector. Serial number 3 of Notification No. 12/2017-Central Tax (Rate) exempts pure services, which excludes works contract service and any other composite supply involving goods, provided to the Central Government, a State Government, a Union territory or a local authority by way of an activity in relation to a function entrusted to a Panchayat under article 243G or to a Municipality under article 243W of the Constitution. A labour-only contract is a pure service, so it can sit inside the entry when both the client and the function fit.

The entry has been narrowed once. From 1 January 2022, Notification No. 16/2021-Central Tax (Rate) omitted the words “or a Governmental authority or a Government Entity” from it, so a board, corporation or authority set up by a government no longer qualifies just because the work is municipal in nature. A separate entry, serial number 3B, inserted from 20 October 2023 by Notification No. 13/2023-Central Tax (Rate), exempts services to a Governmental Authority by way of water supply, public health, sanitation conservancy, solid waste management, and slum improvement and upgradation. Check which kind of body your client is before leaving tax off the bill, because an exemption claimed for the wrong client comes back as tax plus interest.

Government clients also deduct GST at source. Under section 51 of the CGST Act, a department or establishment of the Central or a State Government, a local authority or a Governmental agency deducts one per cent from the payment where the total value of supply under the contract exceeds ₹2.5 lakh. No deduction is made where your location and the place of supply are in a different state from the one the client is registered in. How the deduction is worked and claimed back is covered in GST TDS on works contract, and a taxable labour supply contract follows the same mechanics.

How a manpower contract is taxed under GST

Supply only labour and you are outside the works contract definition, but you are not outside GST. The taxable value on a manpower contract is the price for the whole supply, and the wages and statutory contributions you are liable to pay come into it under Section 15. Price the contract on that basis, keep labour supply and measured work on separate invoices, and confirm the current rate entry before you quote rather than after you bill.

If you run machines as well as crews, the same client relationship usually funds both. Browse live contracts and tenders and check the working capital behind them against equipment finance options.

Rates, schemes, specifications and prices change — confirm current terms with the OEM, dealer, bank or insurer before deciding. Statutory provisions cited here are from the CGST Act; the rate applying to your contract comes from a rate notification, and you should confirm it with the department or your tax adviser before quoting.