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. Our note on GST on works contract works through that test and stops at the point where the answer is no. 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.

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 in our note on 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.

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 publishes a searchable GST rate finder for goods and services, and your tax adviser can confirm the entry that matches your contract. If you are near the registration threshold, our note on the GST registration limit for contractors covers when you have to be in the system at all.

The bottom line

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 with our 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.