Skip to content

Equal Pay Rights

EmploymentLast reviewed: 1 April 20257 min read

The Equality Act 2010 implies an equality clause into every employment contract, entitling men and women to the same pay and terms for equal work. Equal pay is about more than just salary — it covers all contractual terms. Understanding how to identify and challenge pay inequality is an important employment right.

Key points

  • You have the right to equal pay with a comparator of the opposite sex who does the same or equivalent work, or work of equal value.
  • Equal pay covers all contractual terms — not just basic salary but also bonuses, overtime, shift pay, and benefits.
  • You can request information about colleagues' pay through an equal pay questionnaire.
  • Time limits for equal pay claims are strict: you must claim within six months of the end of employment (or the last underpayment if still employed).

The Implied Equality Clause

The Equality Act 2010 implies an equality clause into every contract of employment. This clause requires that, where a person (the claimant) is employed on work equal to that of a comparator of the opposite sex, any term in the claimant's contract that is less favourable than the equivalent term in the comparator's contract is modified to be no less favourable.

Three types of equal work are recognised:

  • Like work: Same or broadly similar work
  • Work rated as equivalent: Work that has been given equal value in a formal job evaluation scheme
  • Work of equal value: Work that is different but can be shown to be of equal value in terms of the demands made (skill, effort, decision-making, etc.) — this is assessed by an independent expert appointed by the Tribunal

An employer can defend an equal pay claim by showing that the pay difference is due to a genuine material factor (GMF) other than sex — for example, a market premium, greater seniority, different qualifications, or performance-related pay.

Choosing a Comparator

To bring an equal pay claim, you must identify an actual comparator — a real colleague (or in some cases a predecessor or successor in the same role) of the opposite sex who does equal work for more pay. You cannot use a hypothetical comparator.

The comparator must work for the same employer or an associated employer at the same establishment, or at a different establishment where common terms and conditions of employment are observed. This means that in large organisations or public sector bodies, comparators can be found across different departments or locations.

Identifying an appropriate comparator can be challenging because pay information is often confidential. However, you can request information from your employer through an equal pay questionnaire, and employment tribunal proceedings provide for disclosure. HMRC also publishes gender pay gap reports for organisations with more than 250 employees.

How to Make an Equal Pay Claim

Equal pay claims can be brought in the Employment Tribunal or the civil courts (county court or High Court). The process in the Employment Tribunal is:

  1. Notify Acas for Early Conciliation
  2. Complete and submit the ET1 claim form, identifying the comparator and the basis of the claim
  3. The Tribunal may appoint an independent expert to assess whether the work is of equal value
  4. The hearing considers whether the work is equal and whether the employer has a genuine material factor defence

Time limits: if you are still employed, you must bring a claim within six years of the unlawful underpayment. If your employment has ended, the limit is six months from the end of employment. For claims brought in the civil courts, the limitation period is six years. Early advice is essential to ensure you are within time.

Frequently asked questions

Can I ask my colleagues how much they earn?
Your employer cannot prohibit you from discussing pay with colleagues for the purposes of identifying potential discrimination — the Equality Act 2010 protects workers who discuss pay in this context. You can ask colleagues informally. For formal purposes, you can send an equal pay questionnaire to your employer requesting pay information.
Does equal pay only apply to salary?
No. The equality clause covers all contractual terms — including bonuses, performance pay, overtime rates, sick pay, pension contributions, company cars, and any other contractual benefit. If your comparator receives a more favourable contractual term in any of these areas, you may have an equal pay claim in respect of that term.
My employer says my lower pay is due to market forces — is that a valid defence?
Market forces can constitute a genuine material factor (GMF) defence, but the employer must show that the market factor is genuinely not related to sex — i.e., that female-dominated roles are not systematically undervalued compared to male-dominated ones. Courts and Tribunals scrutinise GMF defences carefully in equal pay cases.

What to do next

  1. 1
    Read Acas guidance on equal pay

    Acas guidance on equal pay rights and how to address pay inequality.

  2. 2
    Notify Acas for Early Conciliation

    Start the process before bringing an Employment Tribunal claim.

  3. 3
    Read about workplace discrimination

    Understand the broader framework of discrimination law.

Official bodies and resources

Advisory, Conciliation and Arbitration Service

Government

Provides free, impartial advice on workplace relations and employment law, and offers early conciliation before tribunal claims.

Employment Tribunal

Tribunal

Hears claims about employment disputes, including unfair dismissal, discrimination, and unpaid wages.

HM Revenue & Customs

Government

Responsible for collecting taxes, paying some forms of state support, and administering national insurance.

Citizens Advice

Charity

Provides free, confidential, and independent advice on a wide range of issues including benefits, housing, debt, and employment.

Was this page helpful?

Disclaimer

This information is for general guidance only and does not constitute legal advice. You should seek qualified legal help if your situation requires it.