An international business expanding its workforce into the United Kingdom quickly discovers that employment law there operates within one of the most developed and litigated bodies of labour legislation in the world. The gap between a well-drafted employment contract and a costly Employment Tribunal claim can be a matter of weeks. and the reputational and financial consequences of a misstep fall disproportionately on employers who underestimated the statutory baseline.
Employment law in the United Kingdom is governed primarily by employment legislation, including statutory rules on unfair dismissal, redundancy, discrimination, and worker classification. Employees generally acquire full statutory protection after a qualifying period of continuous employment, though certain rights – such as the right not to be discriminated against – apply from day one. Businesses operating in the UK must comply with obligations covering written employment contracts, minimum pay, working time, collective agreement recognition, and termination procedure before any dismissal takes effect.
This page sets out the core legal instruments available to employers and employees in the UK, the practical procedures and timelines that govern them. The cross-border implications for businesses with operations in Portugal and the EU. Additionally, a self-assessment checklist to help international clients evaluate their position before taking action.
The regulatory setting: what makes UK employment law distinctive
The United Kingdom's employment legislative regime sits at the intersection of common law contract principles and a dense layer of statutory rights. Unlike civil law systems in continental Europe, the UK does not operate a single codified labour code. Instead, employment legislation has been built up across multiple Acts of Parliament, statutory instruments. Additionally, case law developed by the Employment Tribunal. The Employment Appeal Tribunal, the Court of Appeal. Additionally, ultimately the Supreme Court (Supreme Court of the United Kingdom).
This layered structure creates a distinctive challenge for international employers. The written employment contract sets out agreed terms, but statutory rights can override those terms – and in many cases can exceed them. An employer cannot contract out of the right to the national minimum wage, the right to paid annual leave, or protection against unfair dismissal once the qualifying threshold is met.
Worker classification is one of the most consequential fault lines in UK employment law. The legal system recognises three categories: employees, workers, and genuinely self-employed contractors. Each category carries different rights and obligations. Employees enjoy the fullest suite of protections. Workers – a category that includes many gig economy participants – hold an intermediate set of rights covering paid leave, minimum wage, and whistleblowing protection. Self-employed contractors hold almost none of these statutory rights. However, misclassifying an employee as a contractor exposes the business to back-pay claims. Penalties from HMRC (His Majesty's Revenue and Customs). Additionally, potential liability for unpaid social security contributions.
The Financial Conduct Authority (FCA) and its predecessor the Financial Services Authority (FSA) have also developed sector-specific employment obligations for regulated firms. Financial services employers must comply with conduct rules, fit and proper person requirements, and Senior Managers and Certification Regime obligations. These sit alongside, and interact with, general employment legislation. A regulated firm that dismisses a certified employee without following both the statutory procedure and the regulatory notification process risks compounding its exposure significantly.
For a business that has recently registered with Companies House and is building its first UK workforce, understanding this regulatory architecture before hiring is essential. The cost of retrofitting compliant employment documentation after the fact is substantially higher than getting it right from the outset.
Core legal instruments: contracts, dismissal, and collective rights
The written statement of employment particulars is the foundational document in any UK employment relationship. Employers must provide it on or before the first day of employment. It must cover pay, hours, location, holiday entitlement, notice periods, and the applicable disciplinary and grievance procedures. Failure to provide a compliant statement does not void the contract, but it exposes the employer to additional awards if the employee brings a tribunal claim.
The employment contract can incorporate terms by reference to a collective agreement negotiated between the employer and a recognised trade union. Where a collective agreement is incorporated, its terms – including pay scales, working hours, and redundancy procedures – become contractually binding. Varying those terms unilaterally, even where the business has a commercial rationale, gives rise to breach of contract claims and may trigger trade union consultation obligations.
Dismissal notice and the termination procedure are areas where international employers most frequently encounter unexpected liability. UK employment legislation distinguishes between wrongful dismissal. a breach of the contractual notice period. and unfair dismissal, which is a statutory claim arising where the employer cannot demonstrate a fair reason and a fair process. The fair reasons recognised by legislation are limited: capability, conduct, redundancy, statutory illegality, and some other substantial reason. An employer who dismisses for one of these reasons but without following a fair procedure still risks an unfair dismissal finding.
The procedural requirements for a fair dismissal typically involve: investigation of the alleged misconduct or capability concern. a formal meeting at which the employee has the right to be accompanied. a decision communicated in writing; and an internal appeal. This sequence must be followed even where the outcome seems inevitable. Courts have confirmed that a dismissal with a predetermined outcome – where the investigation is a formality – is procedurally unfair regardless of the underlying merits.
Redundancy introduces an additional layer. Where 20 or more employees are to be made redundant within a 90-day period, collective consultation obligations are triggered. The employer must notify the government through a prescribed form and begin consultation with elected employee representatives or recognised trade unions for a minimum period before any notice of dismissal is given. Failure to do so exposes the business to protective awards payable to each affected employee.
Discrimination claims operate outside the qualifying period for unfair dismissal. From day one, employees are protected against less favourable treatment based on age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex, and sexual orientation. These are the protected characteristics established by equality legislation. An employer facing a discrimination claim must be prepared to demonstrate objectively that any differential treatment was justified – a high evidential bar.
Settlement agreements are widely used in the UK to resolve employment disputes before or after a claim is issued. A valid settlement agreement must be in writing, must relate to a particular complaint or proceedings, and the employee must have received independent legal advice. Without independent advice, the agreement cannot validly waive the employee's statutory rights. Employers who present settlement agreements without ensuring the employee has access to legal advice risk the agreement being set aside.
To receive an expert assessment of your employment contracts and dismissal procedures in the United Kingdom, contact us at info@ferrazwhitmore.com.
Practical pitfalls for international employers in the UK
Many international businesses entering the UK market underestimate the speed at which Employment Tribunal claims escalate. A claimant has three months less one day from the date of the act complained of to submit most claims. For discrimination, the clock runs from each discriminatory act. The limitation period is strictly applied. An employer who assumes that a period of inactivity after a dismissal means the matter has passed may be surprised to receive tribunal papers shortly before that deadline expires.
Early conciliation through ACAS (Advisory, Conciliation and Arbitration Service) is a mandatory step before most tribunal claims can proceed. The claimant contacts ACAS, which offers a conciliation window. This period pauses the limitation clock. Employers who refuse engagement without a considered strategy often find that early conciliation could have resolved the matter at a fraction of the eventual cost.
A common mistake among employers new to the UK market is conflating the role of disciplinary procedures with the role of performance management. Under UK employment legislation, a failure to follow a fair capability procedure before dismissing an employee for underperformance is treated no differently from a procedural failure in a conduct dismissal. The High Court and Employment Appeal Tribunal have consistently emphasised that the band of reasonable responses test. asking whether a reasonable employer in the same circumstances could have dismissed. does not rescue an employer who skipped the process.
Post-termination restrictive covenants are another area of persistent difficulty. UK courts will enforce non-compete, non-solicitation, and non-dealing clauses only to the extent that they protect a legitimate business interest and go no further than reasonably necessary. Clauses that are drafted too broadly – in scope, duration, or geography – are severed or struck down entirely. An employer who relies on an overly broad clause to deter a departing employee from joining a competitor may find that the clause provides no protection at all when tested before the High Court.
Payroll compliance is enforced rigorously by HMRC. Employers must operate pay-as-you-earn (PAYE) correctly, deduct and remit national insurance contributions, and report benefits in kind accurately. The IR35 rules – which govern off-payroll working – mean that even where a contractor operates through their own company, the engaging business may be responsible for determining employment status and deducting tax accordingly. An incorrect status determination can result in back-tax assessments, penalties, and interest.
Businesses with connections to Portugal or the broader EU should also note that UK employment law no longer mirrors EU employment directives following Brexit. Rights that were previously derived from EU law – including certain aspects of agency worker rights and information and consultation obligations – now rest on retained domestic legislation. Changes to that legislation are possible without reference to EU standards. International employers who manage employees across both UK and EU operations must maintain two distinct compliance frameworks. Our team advising on employment matters in Portugal can help coordinate both sides of that compliance picture.
Cross-border strategy: UK, Portugal, and EU employment considerations
For businesses operating between the United Kingdom and Portugal – or more broadly between the UK and EU member states – employment law creates a set of parallel obligations that do not automatically align. The same individual may be subject to UK statutory rights, EU social security coordination rules, and Portuguese employment legislation depending on where they work, where they are habitually resident, and how their engagement is structured.
Posted workers are a recurring challenge. A business that seconds an employee from its Lisbon entity to its London office must consider whether UK minimum standards – pay, working time, holiday – apply from the outset of the posting. Since the UK exited the EU's Posted Workers Directive regime, the applicable rules are now determined by a combination of the UK-EU Trade and Cooperation Agreement. Domestic UK legislation. Additionally, the employment contract's governing law clause. Getting this analysis wrong creates simultaneous exposure in two jurisdictions.
Social security position is governed by the UK-EU social security coordination protocol. In broad terms, a worker can only be subject to one country's social security system at a time. However, the rules for posted workers, multi-state workers, and self-employed individuals involve detailed assessment. An employee who is paying contributions in Portugal but working principally in the UK. or vice versa – may find that their contributions are misallocated, creating gaps in entitlement and employer liability in both countries.
The governing law of the employment contract is a strategic decision, not merely a drafting preference. Under retained UK private international law rules, parties can choose the governing law of an employment contract. However, an employee working habitually in a particular country will benefit from the mandatory employment protections of that country regardless of the contractual choice. An employer who designates Portuguese law as the governing law of a contract for an employee based in London cannot thereby exclude UK statutory rights on dismissal, discrimination, or working time.
Tax-efficient structuring of cross-border employment arrangements – including the use of employer of record services, dual contracts, and international assignment agreements – requires coordination between UK employment counsel and Portuguese or EU advisers. The corporate law implications of maintaining a UK employer entity must also be considered alongside employment obligations. For the corporate structuring dimension, our team advising on corporate law matters in the United Kingdom works alongside our employment practice to deliver an integrated approach.
Immigration status is another cross-border pressure point. Following the end of free movement, EU nationals working in the UK require immigration permission. Employers who fail to conduct right to work checks correctly – and who employ individuals without the requisite permission – face civil penalties and, in serious cases, criminal prosecution. The right to work check must be conducted before employment begins and, for time-limited permissions, must be repeated at regular intervals.
For a tailored strategy on cross-border employment compliance between the United Kingdom and Portugal, reach out to info@ferrazwhitmore.com.
Self-assessment checklist for employers in the UK
The following checklist is designed to help international employers assess their current position before taking any employment action in the United Kingdom. It does not replace legal advice but identifies the most common pressure points.
Before hiring:
- Confirm the correct worker classification – employee, worker, or self-employed – before the engagement begins.
- Prepare a written statement of employment particulars that complies with current legislation and is ready for day one.
- Conduct a right to work check and document the result before the individual starts.
- Consider whether a collective agreement applies in the relevant sector and whether it should be incorporated.
- Identify whether HMRC's off-payroll working rules apply to any contractor roles.
During the employment relationship:
- Maintain accurate records of working hours, particularly for workers who may be approaching the weekly working time limit.
- Apply disciplinary and grievance procedures consistently and in accordance with ACAS guidance.
- Review and refresh post-termination restrictive covenants whenever an employee's role or seniority changes materially.
- Ensure that any variation to contractual terms is agreed in writing and, where a collective agreement applies, consulted on appropriately.
Before dismissal or redundancy:
- Verify whether the employee has the qualifying period for unfair dismissal protection, but do not assume that shorter-service employees carry no risk – discrimination claims apply from day one.
- Follow the full investigation, meeting, decision, and appeal sequence before any dismissal notice is issued.
- Where 20 or more redundancies are proposed within 90 days, confirm that collective consultation obligations are met and the government notification has been submitted on time.
- Where a settlement agreement is contemplated, ensure the employee has access to and takes independent legal advice before signing.
The approach described in this page is applicable where the employer has a place of business in the United Kingdom. There. The employee works habitually in the UK. Alternatively. There, the employment contract designates UK law as governing. Where any of these conditions is absent or uncertain, a preliminary jurisdictional analysis is the necessary first step.
Frequently asked questions
- How long does an Employment Tribunal claim typically take to resolve in the UK?
- The duration varies considerably depending on complexity and the tribunal's caseload. A straightforward unfair dismissal claim may reach a final hearing within six to twelve months of issue. Discrimination claims, which tend to involve more extensive disclosure and witness evidence, frequently take longer. Early resolution through ACAS conciliation or a negotiated settlement agreement is available at any stage and is often the most time-efficient outcome for both sides. Engaging a lawyer in United Kingdom employment matters early in the process – ideally before the dismissal takes place – materially improves the chances of a structured resolution.
- Does an employer need to pay redundancy to all employees it dismisses?
- A common misconception is that all dismissals trigger a redundancy payment. In fact, statutory redundancy pay applies only where the dismissal is for genuine redundancy reasons and only where the employee has at least two years of continuous employment. The payment is calculated by reference to age, length of service, and weekly pay, subject to a statutory cap on weekly pay. Employees dismissed for conduct, capability, or other fair reasons are not entitled to statutory redundancy pay, though they retain the right to their contractual notice period or payment in lieu.
- Can a business based in Portugal employ someone in the UK without setting up a UK entity?
- In practice, employing someone who works habitually in the UK creates UK employment law obligations regardless of where the employing entity is registered. A Portuguese company that employs a UK-based individual will typically be subject to UK statutory rights, HMRC payroll obligations, and potentially UK immigration compliance duties. Some businesses use employer of record arrangements to manage this exposure without establishing a full UK subsidiary. However, this approach has its own tax and regulatory considerations. As a law firm with expertise across both jurisdictions, Ferraz & Whitmore can help structure the arrangement to manage exposure in both countries.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our employment law practice supports international employers managing workforces in the United Kingdom and across Europe, combining English common law expertise with a deep understanding of civil law employment systems. We advise on employment contract drafting, dismissal procedures, redundancy programmes, settlement agreements, cross-border posting arrangements, and Employment Tribunal strategy. The firm's practitioners have experience before UK employment tribunals and in coordinating multi-jurisdictional employment matters across the UK, Portugal, and EU member states. As an international law firm in the United Kingdom and EU context, Ferraz & Whitmore bridges the post-Brexit compliance gap that many businesses operating between London and Lisbon now face. Our team works with in-house counsel, HR directors, and business owners who need results-focused advice across multiple legal systems. To discuss how we can support your employment law strategy in the United Kingdom, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.