Does CIS Apply to Labourers? The Rules Explained

A labourer can be doing exactly the sort of work that falls within the Construction Industry Scheme one week, then be put on PAYE the next. That is why the question, does CIS apply to labourers, cannot be answered by job title alone. What matters is the work being done, who is paying for it and, crucially, whether the worker is genuinely self-employed.

For construction workers, getting this right is not just admin. It affects the tax taken from each payment, the records you need to keep and whether you may be due a CIS tax refund at the end of the tax year.

Does CIS apply to labourers working in construction?

CIS can apply to labourers when they work as self-employed subcontractors for a contractor and carry out, or help to carry out, construction operations. General site labouring, assisting trades, clearing a site, moving materials, demolition work and groundwork can all fall within the scheme where they form part of construction work.

A contractor may therefore need to verify the labourer with HMRC and deduct CIS tax from their labour payments before paying them. The usual deduction rate is 20% for a registered subcontractor. If the worker is not registered, the contractor will usually deduct 30%. A subcontractor who has been granted gross payment status is paid without CIS deductions, although they must still deal with their tax through Self Assessment.

The important point is that CIS does not automatically apply just because somebody calls themselves a labourer. Nor does it apply to every payment made to a self-employed person on a building site.

Employment status comes before the CIS deduction

If a labourer is an employee, they should normally be paid through PAYE. Their employer deducts income tax and National Insurance through payroll, and CIS should not be used as a substitute for employment taxes.

This is a common area of confusion. A business cannot simply label every site worker a subcontractor, deduct 20% CIS and assume the position is compliant. HMRC looks at the true working arrangement, not just the invoice or the wording in a contract.

A labourer may look more like an employee where the contractor sets their hours, tells them exactly how to do the job, provides all equipment, expects them to work personally every day and pays a fixed hourly or daily rate with little financial risk. Receiving holiday pay, being integrated into one business and having no realistic ability to send a substitute can also point towards employment.

On the other hand, a labourer may be genuinely self-employed where they work for several contractors, decide whether to accept work, provide meaningful equipment, quote for jobs, correct poor work at their own cost or can arrange a suitable substitute. No single factor decides the issue. Construction work is often practical and fast-moving, so the reality on site needs to match the paperwork.

For contractors, getting status wrong can lead to PAYE, National Insurance, interest and penalties becoming due. For labourers, it can mean tax records are incorrect and a refund claim is delayed or challenged.

Which labouring work is covered by CIS?

CIS covers a wide range of construction operations carried out in the UK. For a labourer, that commonly includes work connected with building, altering, repairing, extending, demolishing or dismantling structures. Site preparation, groundwork, installing systems, decorating and cleaning carried out as part of construction work may also be within scope.

A labour-only subcontractor is not outside CIS simply because they do not supply materials. In fact, labour-only arrangements are one of the most straightforward examples of CIS applying, provided the worker is self-employed and the payer is a contractor.

There are exceptions. For example, work that is purely professional, such as architecture or surveying, is generally not construction work for CIS purposes. Delivering materials to site without carrying out construction work is also different from labouring on site. A worker employed directly by the contractor is another separate case, because PAYE rather than CIS applies.

The detail can matter. A person might deliver materials as part of one engagement and also unload, install or assist with construction work as part of another. The latter element may bring CIS into the picture.

Who counts as a contractor?

A construction business that pays subcontractors is usually a contractor for CIS. This includes builders, developers, property maintenance businesses and many specialist trades that engage other workers.

Some non-construction businesses can become contractors too if their annual spend on construction operations reaches the relevant threshold over a rolling period. This catches businesses that are not builders by trade but carry out substantial building projects, such as property businesses or larger organisations refurbishing premises.

Private householders arranging work on their own home are not normally CIS contractors. If you are a labourer doing work directly for a homeowner, CIS deductions will not usually apply simply because the work is construction-related. That does not remove your obligation to declare self-employed income and pay the correct tax, but it changes how you are paid.

What contractors need to do before paying a labourer

Where CIS applies, the contractor must register for the scheme, verify a new subcontractor with HMRC and apply the deduction rate HMRC confirms. Verification is not a formality. It checks that the worker’s name, Unique Taxpayer Reference and National Insurance number match HMRC records.

The contractor then calculates the deduction from the labour element of the payment. CIS tax is not normally deducted from the cost of materials that the subcontractor has paid for and itemised separately. VAT is also treated separately for this calculation where applicable. Travel, plant hire and other costs need careful handling because the right treatment depends on what is being charged and the contractual arrangement.

Each month, the contractor submits a CIS return to HMRC and gives the subcontractor a payment and deduction statement. Labourers should keep every statement. It is the evidence of tax already paid on their behalf and is essential when completing a Self Assessment return or claiming a refund.

A contractor must also make the payment to HMRC on time. Deducting CIS from a labourer but failing to submit it to HMRC is a serious compliance problem, and it can create unnecessary difficulty for the subcontractor trying to obtain credit for their deductions.

What self-employed labourers should do

If you are working under CIS, register as self-employed and obtain a UTR before starting wherever possible. This helps the contractor verify you and usually means the 20% rate applies rather than 30%.

Keep clear records of income, invoices, bank payments, CIS statements and business expenses. Typical allowable expenses for a labourer may include protective clothing, tools, certain travel between temporary workplaces, insurance, accountancy fees and the business proportion of phone costs. The expense must be genuinely incurred wholly and exclusively for the business. Everyday clothing, ordinary commuting and personal costs cannot simply be put through because you work in construction.

CIS deductions are not a final tax bill. They are payments on account towards your income tax and National Insurance. When you complete your Self Assessment return, the tax deducted is set against your total liability. If too much has been deducted, you may be due a refund. If your income has been strong or you have other untaxed income, you could still have tax to pay.

This is why claiming every legitimate expense matters. A labourer who has had 20% deducted from gross labour payments may assume a refund is guaranteed, but the real answer depends on their profit, other income and personal tax position.

Agency work and limited companies need extra care

Agency arrangements can make the answer less obvious. A labourer may be paid by an agency, an umbrella company or another intermediary rather than by the site contractor. In some cases PAYE applies through the intermediary; in others CIS may be used. The contractual chain and the real working arrangement need reviewing before payments are made.

The same principle applies to labourers operating through a limited company. A company can be a CIS subcontractor, but the company’s director may have separate payroll and corporation tax responsibilities. CIS deductions suffered by the company must be recorded and set against the right liabilities. They are not automatically the director’s personal tax credit.

Get the setup right before the first payment

For labourers, the practical question is whether you are truly self-employed and doing construction work for a CIS contractor. For contractors, it is whether the arrangement stands up to scrutiny before you make a payment. Sorting it out early is far easier than correcting months of deductions, payroll errors and missing statements later.

If the position is unclear, get it checked before the first invoice goes in. A straightforward review of status, contracts and payment records can protect both sides and make sure any tax refund due is claimed on the right basis.