This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Discrimination during workplace investigations explained under UK employment law, including Equality Act protections, tribunal claims, procedural fairness, harassment, victimisation, and employer obligations during disciplinary and grievance processes.

Workplace investigations are a standard part of employment procedures in the UK, typically arising from grievances, misconduct allegations, disciplinary matters, or complaints of harassment and discrimination. Employers are expected to investigate fairly and thoroughly before taking action.
However, investigations themselves can give rise to discrimination claims if they are conducted in a biased, unequal, or procedurally unfair manner. Under the Equality Act 2010, employees are protected from direct and indirect discrimination, harassment, and victimisation during all stages of employment, including internal investigations.
This article explains how discrimination can arise during workplace investigations, the legal standards employers must meet, how tribunals assess these situations, and what remedies may be available.
Legal Framework: Equality Act 2010
The Equality Act 2010 applies throughout the employment relationship, including internal investigations. Relevant protections include:
- Direct discrimination (section 13)
- Indirect discrimination (section 19)
- Harassment (section 26)
- Victimisation (section 27)
Protected characteristics include:
- Sex
- Race
- Disability
- Age
- Religion or belief
- Sexual orientation
- Pregnancy and maternity
- Gender reassignment
- Marriage and civil partnership (limited scope)
Investigations must be conducted without unlawful treatment based on any of these characteristics.
How Discrimination Can Occur During Investigations
Discrimination during workplace investigations may arise at multiple stages, including:
1. Decision to investigate
- Investigating one employee but not another in similar circumstances
- Initiating investigations based on stereotypes or assumptions
- Targeting individuals disproportionately from certain groups
2. Conduct of the investigation
- Unequal questioning of witnesses
- Biased interpretation of evidence
- Failure to consider relevant contextual information
- Disregarding evidence favourable to a protected group
3. Suspension and treatment during investigation
- Suspensions applied inconsistently
- Disproportionate disciplinary measures
- Differential treatment in communication or access to information
4. Outcome of the investigation
- Disciplinary action influenced by bias
- Failure to properly consider mitigating factors linked to protected characteristics
Direct vs Indirect Discrimination in Investigations
Direct discrimination
Occurs where an employee is treated less favourably because of a protected characteristic.
Example:
- An employee is assumed guilty in an investigation because of their race or religion.
Indirect discrimination
Occurs where a neutral investigation procedure disadvantages a group.
Example:
- A requirement that all investigation meetings occur outside normal working hours disproportionately disadvantages employees with childcare responsibilities (often linked to sex discrimination claims).
Indirect discrimination may be lawful if objectively justified, but justification must be evidence-based.
Harassment and Victimisation in Investigations
Harassment
Harassment may occur where investigation conduct creates an intimidating, hostile, or degrading environment related to a protected characteristic.
Examples include:
- Offensive questioning linked to religion or race
- Humiliating treatment during interviews
- Derogatory assumptions about capability or honesty
Victimisation
Victimisation occurs where an employee is treated unfairly because they have:
- Raised a discrimination complaint
- Supported a colleague's complaint
- Participated in proceedings under the Equality Act
Example:
- An employee is subjected to a more aggressive investigation after reporting harassment.
Procedural Fairness in Investigations
While procedural fairness is not itself discrimination law, unfair processes often overlap with discrimination risks.
Employers are generally expected to:
- Conduct investigations without bias
- Ensure impartial investigators where possible
- Allow employees to respond to allegations
- Consider all relevant evidence
- Avoid pre-judging outcomes
- Keep appropriate records
Failure to follow fair procedures may support a discrimination claim if linked to a protected characteristic.
Common Risk Areas in Workplace Investigations
1. Implicit bias in decision-making
Investigators may unintentionally interpret behaviour differently based on stereotypes.
2. Inconsistent treatment
Different employees may be treated differently for similar conduct without objective justification.
3. Failure to adjust for disability
Investigations must make reasonable adjustments for disabled employees, such as:
- Extra time for interviews
- Accessible formats for documentation
- Support persons during meetings
4. Cultural or language misunderstandings
Misinterpretation of communication styles or language ability may lead to unfair findings.
5. Selective evidence gathering
Ignoring witnesses or evidence that supports a particular group can indicate bias.
Objective Justification and Employer Defences
Employers may defend certain practices if they can show:
- A legitimate aim (e.g. ensuring workplace safety or investigating misconduct)
- A proportionate method of achieving that aim
However, justification is not a defence to direct discrimination or harassment. It is mainly relevant to indirect discrimination claims.
Tribunals will closely assess whether investigation procedures were necessary and fairly applied.
Employment Tribunal Approach
Employment Tribunals consider:
- Whether a protected characteristic influenced the investigation
- Whether procedures were applied consistently
- Whether there was evidence of bias or unfair treatment
- Whether any disadvantage can be objectively justified
- Whether the claimant suffered harm (financial or emotional)
Tribunals focus heavily on documentation, witness evidence, and decision-making processes.
Legal Process for Claims
Step 1: Internal grievance
Employees may raise concerns about:
- Bias in the investigation
- Unequal treatment
- Procedural unfairness
Step 2: ACAS Early Conciliation
Required before most tribunal claims. ACAS attempts settlement without litigation.
Step 3: Employment Tribunal claim
A tribunal may consider claims such as:
- Discrimination
- Harassment
- Victimisation
- Unfair dismissal (where applicable)
Time Limits
Claims must usually be brought within:
- 3 months minus one day from the discriminatory act or last incident in a continuing series
Time limits are paused during ACAS Early Conciliation.
Remedies and Compensation
If a claim succeeds, Employment Tribunals may award:
- Compensation for financial losses
- Injury to feelings awards
- Interest on compensation
- Recommendations for workplace changes (limited use)
There is no upper limit on discrimination compensation.
Employer Responsibilities
Employers are expected to ensure investigations are:
- Fair and impartial
- Evidence-based
- Free from discrimination
- Properly documented
- Conducted by trained personnel
Good practice includes using independent investigators in sensitive cases and providing equality training to managers.
Common Questions from our Readers
Can a workplace investigation itself be discriminatory?
Yes. If it is biased or treats individuals differently because of a protected characteristic.
Does intent matter?
No. Discrimination can occur even without intentional bias.
Can I challenge an investigation outcome?
Yes, through grievance procedures and potentially an Employment Tribunal claim.
Are employers allowed to suspend employees during investigations?
Yes, but suspension must be reasonable, necessary, and not discriminatory.
Key Takeaways
Workplace investigations must be conducted fairly and without discrimination under the Equality Act 2010. Discrimination can arise at any stage, including the decision to investigate, the conduct of interviews, or the final outcome.
Key points include:
- Investigations must not be influenced by protected characteristics
- Both direct and indirect discrimination may occur
- Harassment and victimisation protections apply during investigations
- Employers must follow fair and consistent procedures
- Tribunal claims may result in significant compensation
Ensuring impartial and well-documented investigations is essential to reducing legal risk and maintaining workplace fairness.