FAQs

Q1: Can a worker switch between CIS subcontractor and PAYE employee status with the same business depending on the project?

A1: Yes, it’s possible, but only if the actual working relationship genuinely changes each time. In my experience with clients in the Midlands, a site manager might be employed on PAYE for a long-term development role involving daily oversight and fixed hours, then engaged as a specialist subcontractor under CIS for a one-off design phase where they invoice for labour and materials with their own insurance. The key is documenting the different terms clearly and running a fresh employment status check. HMRC will look at the reality on the ground, not the paperwork alone. Mixing the two without a real distinction risks reclassification and backdated employer National Insurance.

Q2: What should a construction business do if a long-term CIS subcontractor starts behaving more like an employee?

A2: This is one of the most common issues I see. If the subcontractor works exclusively for you, uses your tools, follows your daily instructions, and has no real financial risk, you should review the status immediately. In practice, I’ve advised clients to transition them onto PAYE before HMRC does it for you. The cost of employer NIC and entitlements is often lower than a surprise assessment plus penalties years later. Keep records of when and why the relationship shifted.

Q3: How do Scottish income tax rates affect someone operating as a CIS subcontractor versus a PAYE employee?

A3: Scottish taxpayers face different income tax bands and rates from the rest of the UK, which can make a noticeable difference depending on total income. For PAYE employees, the employer applies the correct Scottish tax code via RTI, so deductions are usually spot on. CIS subcontractors receive a flat 20% or 30% deduction regardless of where they live, then sort out the Scottish rates through Self Assessment. I’ve had clients in Glasgow who ended up with a small underpayment because they didn’t factor in the higher Scottish bands on their trading profits. Always declare CIS income accurately and consider quarterly payments on account if your profits are rising.

Q4: Does operating a mixed workforce create any issues when claiming the Employment Allowance?

A4: The Employment Allowance can still be claimed against your PAYE Class 1 secondary National Insurance liabilities, but it won’t apply to CIS payments. If your business is close to the £100,000 PAYE threshold or you have connected companies, watch for eligibility rules. One client with a mix of site staff and specialist subcontractors saved several thousand pounds by carefully allocating the allowance to their employee payroll only. Check your eligibility each year as the rules tighten.

Q5: What happens if a subcontractor with Gross Payment Status supplies both labour and materials in one invoice?

A5: You only deduct CIS tax on the labour element, provided the materials are properly evidenced. This is where many businesses trip up. I remember a roofing contractor client who paid gross on the whole invoice for several months until an HMRC review. The materials invoices were in the subcontractor’s name, but the amounts weren’t clearly separated. Keep detailed breakdowns and supporting invoices to avoid having to repay deductions plus interest.

Q6: Can directors of a limited company that is CIS-registered also be on PAYE for their own company?

A6: Absolutely. Many construction company directors take a modest salary through PAYE for tax and National Insurance purposes while the company operates as a CIS contractor for its subcontractors. This is perfectly normal. The important point is keeping the director’s employment separate from any subcontractor work they might do personally. I’ve seen confusion arise when directors also trade as sole traders on the side – make sure the two capacities don’t blur.

Q7: How does the apprenticeship levy interact with a mixed CIS and PAYE workforce?

A7: The levy is calculated only on your PAYE payroll bill above the £3 million threshold (or the relevant lower threshold for connected companies). CIS payments to genuine subcontractors don’t count towards the levy. This can make a mixed model attractive for larger firms looking to manage levy exposure. One building firm I work with keeps core permanent staff under PAYE and uses CIS for variable trades to keep their levy bill under control while still claiming levy-funded training where possible.

Q8: What are the risks of using the same person as both a CIS subcontractor and an agency worker through different routes?

A8: This arrangement often raises red flags. If the substance of the relationship is employment, HMRC or an employment tribunal could look through the structures. I’ve advised clients to avoid dual arrangements with the same individual unless the roles are genuinely distinct and separately contracted. The cash-flow benefit can be tempting, but the compliance risk and potential employment rights claims make it something to approach very carefully.

Q9: Does remote or office-based work in a construction support role change whether CIS or PAYE applies?

A9: CIS only covers construction operations, so purely administrative, design, or consulting work outside site activities usually falls under normal PAYE or Self Assessment rules rather than CIS. A quantity surveyor working remotely for multiple contractors might not trigger CIS at all. Clients sometimes assume everything in the sector is CIS – that’s a common and expensive misunderstanding.

Q10: What should a subcontractor do if they suspect their contractor has applied the wrong CIS deduction rate?

A10: First, check your verification status with HMRC and ask the contractor for their records. If a 30% deduction was applied when you’re registered for net payment, you can usually recover the difference through your Self Assessment or by contacting HMRC. In my practice, prompt action has saved clients hundreds or even thousands. Keep your own records of every payment and deduction statement.

Q11: How do pension contributions work differently for PAYE employees versus CIS subcontractors in a mixed team?

A11: PAYE employees can benefit from auto-enrolment and employer contributions that reduce the employer’s NIC bill. CIS subcontractors arrange their own pensions, usually as self-employed relief on contributions. This is an area where businesses can differentiate their offering to attract good permanent staff while using subcontractors for flexibility. Consider salary sacrifice arrangements for employees that aren’t available to subcontractors.