Equal Pay: Legal Requirement

Equal pay is a fundamental legal requirement in UK employment law. It ensures that men and women receive equal pay for equal work. The principle is set out in the Equality Act 2010 and is designed to eliminate pay discrimination based on sex.

The law applies to all contractual terms of employment, not only basic salary. It covers bonuses, overtime rates, pensions, holiday pay, and other benefits. Employers must ensure pay systems are free from unlawful gender-based disparities.

This article explains how equal pay is defined, when it applies, how claims are assessed, and what legal remedies are available in Employment Tribunals in England and Wales.

Legal Basis of Equal Pay in the UK

The right to equal pay is primarily governed by:

• Equality Act 2010 (Part 5, Chapter 3)
• Retained principles from EU equality law
• Case law from UK courts and Employment Tribunals

The law implies an “equality clause” into all employment contracts, meaning that where a woman is employed in equal work to a man (or vice versa), her contract is automatically modified to ensure equal pay.

This applies regardless of whether there is an explicit agreement.

What Counts as “Equal Work”

Equal pay law applies when employees are doing:

1. Like work

Work that is the same or broadly similar.

2. Work rated as equivalent

Jobs that have been assessed as equivalent under a job evaluation scheme.

3. Work of equal value

Different roles that require similar levels of skill, effort, responsibility, or decision-making.

Employment Tribunals may compare roles across departments or job titles to determine whether they are of equal value.

What Is Covered by Equal Pay

Equal pay law covers more than salary. It includes:

• basic pay
• overtime rates
• performance-related bonuses
• allowances and benefits
• pension contributions
• sick pay and maternity pay enhancements
• non-cash benefits (e.g. company cars, shares)

Any contractual term related to remuneration can be examined for inequality.

Legitimate Reasons for Pay Differences

Employers may defend pay differences if they can show they are due to:

• genuine material factors unrelated to sex
• differences in experience or qualifications
• market forces or recruitment difficulties
• performance differences based on objective criteria
• geographic or role-based differences

However, the employer must prove that the reason is not discriminatory and is applied consistently.

Equal Pay Claims in Employment Tribunals

Employees can bring equal pay claims in Employment Tribunals. These claims typically involve:

• comparing pay with a real or hypothetical comparator of the opposite sex
• analysing job roles and responsibilities
• assessing whether differences are justified

Tribunals may order disclosure of pay data, job descriptions, and HR records.

Claims often arise alongside broader discrimination claims under the Equality Act 2010.

Time Limits for Equal Pay Claims

Time limits are complex:

• claims can generally be brought while employment continues
• after employment ends, claims must usually be brought within 6 months less one day in the Employment Tribunal
• claims may also be brought in the civil courts within longer limitation periods in some circumstances

Early legal assessment is often necessary due to overlapping jurisdiction rules.

Remedies and Compensation

Where an equal pay claim succeeds, remedies may include:

• back pay for up to 6 years (5 years in Scotland, but this article focuses on England and Wales)
• compensation for ongoing pay disparity
• pension adjustments
• interest on unpaid sums

Tribunals may also issue declarations requiring equalisation of pay going forward.

Role of Pay Transparency and Evidence

Equal pay disputes often rely on detailed evidence, including:

• salary records and payslips
• job descriptions and grading structures
• organisational charts
• HR policies and pay scales
• comparator evidence (employees doing similar work)

Employers are increasingly expected to justify pay structures transparently, especially in large organisations.

Common Equal Pay Issues in the Workplace

Frequent areas of dispute include:

• gender-based pay gaps in similar roles
• unequal bonus schemes
• differences in promotion opportunities affecting pay progression
• historic pay disparities carried forward over time
• undervaluation of roles predominantly performed by women

Such issues often lead to group or multi-claimant tribunal proceedings.

Employer Defences in Equal Pay Cases

Employers may rely on the “material factor defence” by showing:

• pay differences are based on a legitimate, non-discriminatory reason
• the reason is significant and relevant to the role
• it applies equally regardless of gender

However, even neutral policies can be unlawful if they indirectly disadvantage one sex and cannot be objectively justified.

Interaction with Gender Pay Gap Reporting

Large employers may also be subject to gender pay gap reporting requirements under separate regulations. While this does not directly prove unlawful pay discrimination, it can:

• highlight systemic pay differences
• prompt regulatory scrutiny
• support evidence in equal pay claims

Enforcement and Tribunal Process

Equal pay claims are handled by Employment Tribunals. The process generally includes:

• filing a claim form (ET1)
• Acas Early Conciliation
• exchange of documents and evidence
• preliminary hearings on comparators or jurisdiction
• full merits hearing

Tribunals can require extensive disclosure due to the complexity of pay comparisons.

Risks for Employers

Non-compliance with equal pay obligations can result in:

• significant back pay liabilities
• large-scale group claims
• reputational damage
• internal workforce disputes
• regulatory and investor scrutiny

Equal pay litigation is often high-value and document-intensive.

Key Takeaways

Equal pay law in England and Wales requires employers to ensure that men and women receive equal pay for equal work. The Equality Act 2010 covers not only salary but all forms of remuneration. Employees may bring Employment Tribunal claims comparing roles of equal value or similar work. Employers must justify any pay differences with objective, non-discriminatory reasons. Failure to comply can result in substantial compensation awards and long-term legal and financial exposure.