Sex discrimination

Sex discrimination is still widespread in the UK – UNISON campaigns for fairer pay and conditions for all workers
Last updated: 21 April 2026

More than two-thirds of UNISON members are women. As well as earning less than men, women are more likely to face sex discrimination and harassment at work.

Many women also have caring commitments and have to juggle work and home commitments, so they are more likely to work part-time, to take career breaks or be overlooked for promotion. All these factors combine so that women may receive much lower pensions and many women retire into poverty.

These are just some of the reasons why UNISON takes sex discrimination seriously. We are committed to leading negotiating and campaigning on women’s rights at work and in the community and to fighting sex discrimination wherever it arises. 

On this page

What is sex discrimination? 

Women and men have the right not to be discriminated against at work because of their sex.

Some employers have outdated ideas about what work is appropriate for women, what work is appropriate for men, and how that work should be rewarded. Some employers allow or ignore sexual discrimination in the workplace or apply rules that put either women or men at an unfair disadvantage.

Although there has been an Equal Pay Act in force in the UK since 1975, women still earn an average of 19.8% less than men, according to the Office for National Statistics. 

Equality Act 2010 

Sex discrimination in Great Britain is one of the areas covered by the Equality Act 2010, which includes legislation against many forms of discrimination. 

In Northern Ireland, sex discrimination is covered by the Sex Discrimination (Northern Ireland) Order 1976 and related regulations, rather than the Equality Act 2010. These laws protect workers from direct and indirect discrimination, harassment and victimisation on the grounds of sex.

The Equality Act 2010 (and the Northern Ireland equivalents) aims to protect everyone’s rights in all areas of their lives. 

Employers should treat men and women equally, including:

  • When they apply for a job.
  • Terms and conditions.
  • Part-time and flexible working arrangements.
  • Pay and benefits.
  • Training, development, promotion and appraisals.
  • Dismissal, redundancy and retirement.

The law defines four types of sex discrimination:

  • Direct discrimination – treating someone less favourably because of their sex.
  • Harassment – unwanted behaviour related to a person’s sex that has the purpose or effect of violating someone’s dignity, or creates an intimidating, hostile, degrading, humiliating or offensive environment for that person.
  • Indirect discrimination – where an employer imposes a rule or applies a practice to everyone which puts either men or women at a particular disadvantage compared to others. An employer may be able to justify indirect discrimination if it is a proportionate means of achieving a legitimate aim.
  • Victimisation – when you are treated unfavourably because you have complained about discrimination or supported someone who has.

UNISON and equal pay

One of the fundamental principles we stand for at UNISON is equal pay. Nobody should be paid less because of their gender.

The law says that people doing the same or similar work, work which is of equal value or work that has been rated as equal through job evaluation must be paid the same – this is a principle that we defend using negotiation, litigation and direct action. 

What to do next

  • 1 If you are experiencing sex discrimination, you may want to raise the issue with your line manager first. If you can’t resolve the issue informally, speak to your UNISON rep.
  • 2 If informal resolution fails, your UNISON rep can guide you through the formal grievance procedure with your employer. You should be aware that strict time limits apply to making a tribunal claim. At the moment in Great Britain, this is three months less one day from the act of discrimination, but it is anticipated that the time limit will increase to six months less one day from October 2026.
  • 3 In Northern Ireland, the time limit for bringing a sex discrimination claim is three months exactly from the date of the act complained of. Early Conciliation is carried out by the Labour Relations Agency (LRA), not ACAS.
  • 4 If you think you are being paid unfairly, you can talk, or write, to your employer to try to resolve the issue informally. If you are unsuccessful, contact your UNISON rep who can help you.

Frequently asked questions

Legal disclaimer 


The information contained within this article is not a complete or final statement of the law and is based on the laws of England, Wales, Scotland and Northern Ireland. 


While UNISON has sought to ensure that the information is accurate and up to date, it is not responsible and will not be held liable for any inaccuracies and their consequences, including any loss arising from relying on this information. If you are a UNISON member with a legal problem, please contact your branch or region as soon as possible for advice, or for non-employment matters call UNISONdirect.