Subcontractors vs Employees for UK Trade Businesses: Which Is Right for You? (2026)

Every growing trade business reaches the same crossroads: you have more work than you can handle alone, and you need to decide whether to take on a subcontractor or employ someone directly. The difference between the two is enormous — in tax, liability, day-to-day management, and what happens when things go wrong. This guide cuts through the confusion so you can make the right call for your business.

The fundamental difference: control and risk

An employee works under your direction. You tell them when to start, where to go, which tools to use, and how to do the job. You pay their National Insurance, statutory sick pay, holiday pay, and pension contributions. You are responsible for their actions on site. In return, you have full control over quality, scheduling, and customer-facing behaviour.

A subcontractor is, in theory, an independent business that you hire to carry out a specific piece of work. They set their own hours, use their own tools, work for multiple clients, and carry their own insurance. You pay them an agreed amount for the work done and deduct CIS tax if the Construction Industry Scheme applies. In practice, the line between a subcontractor and a disguised employee is where HMRC and employment tribunals pay close attention.

CIS vs PAYE: what you actually owe

If you are a contractor in the construction industry (which includes most plumbers, electricians, roofers, and builders doing work on buildings), the Construction Industry Scheme applies when you pay subcontractors. As the contractor, you must verify each subcontractor with HMRC before first payment, then deduct CIS tax at the correct rate: 20% for registered subcontractors, 30% for unregistered ones, and 0% for those with gross payment status.

You submit a monthly CIS return to HMRC listing every subcontractor paid, the gross amount, and the deduction made. You pay the deducted tax to HMRC. Fail to do this and you are personally liable for the tax that should have been deducted — even if the subcontractor has since disappeared. The admin burden is real but manageable with the right systems in place.

PAYE for employees is a different system. You deduct income tax and employee National Insurance from each payslip, add employer National Insurance on top (13.8% above the threshold in 2026), pay the total to HMRC monthly via Real Time Information filing, and handle auto-enrolment pension contributions. The total employment cost of a worker is typically 20–25% above their gross wage.

IR35 and the disguised employee risk

IR35 is HMRC's framework for identifying workers who call themselves subcontractors but are, in reality, employees. For most small trade businesses (under the medium/large company threshold), the subcontractor is still responsible for assessing their own IR35 status. But HMRC can and does investigate, and if they determine your “subcontractor” was actually an employee in disguise, the tax bill — including interest and penalties — lands on you as the paying contractor.

The warning signs that HMRC looks for: the subcontractor works exclusively for you, cannot send a substitute, works set hours you dictate, uses your tools and materials, and has no financial risk of their own. If three or more of these apply, your “subbie” arrangement is likely to fail an IR35 challenge. Use HMRC's Check Employment Status for Tax (CEST) tool to assess any borderline case before you start paying.

Liability differences that actually matter on site

Liability is where the subcontractor vs employee distinction becomes most important for trade businesses. A genuine subcontractor carries their own public liability insurance, their own tools cover, and their own professional indemnity where relevant. If they damage a customer's property or injure someone through their negligence, their insurance responds first. Your exposure is limited.

With an employee, you carry vicarious liability for everything they do in the course of their employment. Their mistakes are your mistakes. Your employers' liability insurance (legally required at £5 million minimum) covers workplace injuries to the employee themselves, but damage they cause to third parties comes through your public liability policy. Always verify that a subcontractor has current, adequate insurance before they set foot on a job — and keep a copy of their certificate on file.

When subbies make sense

Subcontractors are the right choice when your workload is seasonal or project-based, when you need a specialist skill for a single job (a plasterer on a bathroom fit-out, a ground worker for a drainage run), or when you are growing fast and not yet ready to commit to permanent headcount. They give you flexibility to scale up for a big commercial contract and scale back when it ends, without redundancy risk.

Subbies are also sensible for high-risk or high-value work where their independent insurance provides an additional layer of cover. Many commercial contracts actually require you to use subcontractors with their own accreditations (CHAS, Constructionline, Gas Safe) rather than unqualified employees — checking this requirement before you price the job prevents nasty surprises.

When an employee is the better call

If you have steady, year-round work for a second person, employing them directly almost always makes more sense in the long run. You can train them to your standard, invest in their development, and build loyalty that a subcontractor relationship rarely creates. Employees are more likely to care about the quality of your customer relationships because they are part of the business, not just passing through.

The break-even point varies by trade, but as a rough rule of thumb: if you are putting 3+ days of work per week in front of someone for more than six months of the year, you should be looking at employment rather than subcontracting. The employment cost premium (NI, holiday, sick pay) is real but predictable — and you gain full control of quality and scheduling in return.

Managing a hybrid workforce without losing control

Most trade businesses with 3–10 people end up with a hybrid workforce: one or two employed engineers who form the stable core, plus a panel of trusted subcontractors who can be called on for specialist work or peak demand. Managing this well requires clear systems: separate job files for CIS deductions and PAYE payroll, subcontractor compliance records (insurance certificates, Gas Safe/NICEIC cards, CIS verification numbers), and a scheduling system that shows you who is available and what they cost.

Trade2Base lets you record each team member as either an employee or subcontractor, tracks their certifications and insurance renewal dates, and flags CIS deduction requirements automatically when you assign a subcontractor to a job. Payment records and monthly CIS return data are kept in one place, reducing the monthly admin to a 15-minute task rather than a morning of spreadsheet work.

The biggest mistake growing trade businesses make is running a mixed workforce informally, without written subcontractor agreements, without verifying CIS status, and without keeping insurance records. When HMRC investigates — and they do investigate trade businesses — the paper trail is what protects you. Get the admin right from day one and the hybrid model is genuinely the most flexible and cost-effective way to grow.