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Construction Employment Law UK: Employer Guide 2025

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Written by Brad Askew Solicitor (non-practising)
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice.
Updated June 2026 · England & Wales
Running a construction business in the UK brings employment law challenges that differ from most other sectors. You may be juggling a mix of direct employees, labour-only subcontractors, agency workers and self-employed tradespeople, all of whom have different rights and different tax treatment. On top of that, you have site safety obligations, fluctuating workloads driven by project pipelines, and the constant need to bring skilled labour in quickly when a job starts. I've written this guide for directors, HR managers and site managers who want a plain-English overview of where construction employers most often slip up, and how to stay on the right side of the law. It isn't a substitute for proper legal input on a specific problem, but it should help you spot the issues that need attention.

Overview

Employment law in the construction sector is not a single statute but a patchwork of rules that apply to anyone engaging workers to carry out building work in England and Wales. The main sources include the Employment Rights Act 1996, the Equality Act 2010, the National Minimum Wage Act 1998, the Working Time Regulations 1998, the Health and Safety at Work etc.

Act 1974, and the Construction (Design and Management) Regulations 2015. Tax status is governed separately by HMRC rules, including the Construction Industry Scheme (CIS) and IR35 for off-payroll working. For construction employers, the practical challenge is that employment law overlaps with health and safety law, tax law, and sector-specific schemes like CIS.

A person who turns up on site with their own tools may still be a worker for employment purposes, even if they are self-employed for tax. That mismatch is where a lot of disputes start, and it is why written agreements and clear working practices matter so much on a construction site.

Key steps

  1. Get worker status right from the outset. Before anyone starts on site, work out whether they are an employee, a worker, or genuinely self-employed. Construction has a long history of treating everyone as self-employed, but tribunals look at the reality of the relationship, not the label on the invoice. Misclassification can mean backdated holiday pay, unpaid wages and unfair dismissal claims.
  2. Issue written terms on day one. Every employee and every worker is entitled to a written statement of particulars from the first day of engagement. This should cover pay, hours, holiday, place of work, notice, disciplinary procedures and any probationary period. For construction roles, include mobility clauses if staff move between sites, and set out arrangements for bad weather or site closures.
  3. Pay at least the statutory minimum and track hours accurately. Check current National Minimum Wage and National Living Wage rates on gov.uk, and remember that travel between sites during the working day usually counts as working time. Keep proper records of hours worked, particularly where workers are on piece rates or split their time across projects, because HMRC can inspect and issue penalties.
  4. Treat health and safety as an employment issue, not just a site issue. Dismissing or disciplining someone for raising safety concerns is automatically unfair and can lead to uncapped compensation. Make sure your induction, toolbox talks, PPE and near-miss reporting procedures are documented, and that supervisors know they cannot punish workers for refusing unsafe work.
  5. Follow a fair procedure for discipline and dismissal. The ACAS Code of Practice on Disciplinary and Grievance Procedures applies to construction employers just as much as to office-based ones. Investigate first, put allegations in writing, hold a proper hearing, allow the worker to be accompanied, and offer a right of appeal. Short cuts here are expensive at tribunal.
If you're dealing with this kind of situation, a call with an experienced legal adviser can help you work out the right next step — from £89.

Common questions

Q Are labour-only subcontractors employees for employment law purposes?
They might be. Employment tribunals look at factors like control, mutuality of obligation, personal service and integration into the business, rather than what the contract says. Even someone registered under CIS and paid gross can turn out to be a worker or employee for rights such as holiday pay and the minimum wage. If in doubt, take advice before relying on a self-employed label.
Q Do construction workers get paid holiday?
Employees and workers are entitled to statutory paid holiday under the Working Time Regulations 1998. Genuinely self-employed contractors are not. A common mistake in construction is rolling holiday pay into an hourly rate without clear documentation, which can leave the employer exposed to back-pay claims. Separate holiday accrual records are safer.
Q What is the CIS and does it affect employment status?
The Construction Industry Scheme is an HMRC tax scheme that requires contractors to deduct money from payments to subcontractors and pass it to HMRC. CIS governs tax, not employment status. Someone can be registered under CIS and still be a worker or employee for employment law purposes, so you cannot use CIS registration as a shield against employment claims.
Q Can I dismiss a worker who refuses to work on safety grounds?
Generally no. Employees have specific statutory protection against dismissal or detriment for raising health and safety concerns or leaving a workplace they reasonably believe to be seriously and imminently dangerous. These claims do not require two years of service and compensation is uncapped, so they are treated very seriously by tribunals.
Q What notice period applies when a project ends?
Ending a project is not automatically a fair reason to end employment without notice. Employees with one month or more of service are entitled to at least the statutory minimum notice, and those with two years' service may have unfair dismissal and redundancy rights. Fixed-term project contracts should be drafted carefully to reflect this.
Q Do I need written contracts for every site worker?
Yes, in practice. Since April 2020, all employees and workers have the right to a written statement of main terms on or before their first day. Even for short engagements, a written agreement protects both sides and makes disputes much easier to resolve. It is cheap insurance compared with a tribunal claim.
Q How does IR35 affect construction businesses?
If you engage workers through their own limited companies (personal service companies), off-payroll working rules may apply where your business is medium or large sized. You would then need to assess whether the engagement is inside or outside IR35 and apply the correct tax treatment. The rules are separate from employment status but often looked at alongside it.
If you're dealing with this kind of situation, a call with an experienced legal adviser can help you work out the right next step — from £89.

Sources

This guide is based on primary UK law and official guidance.

Brad Askew, Solicitor (non-practising)

Written & reviewed by

Brad Askew Solicitor (non-practising)

Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.

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Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.