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.
Explanation of employment contract implied terms in UK law, including mutual trust and confidence, statutory duties, and case law principles. Covers how implied terms arise, legal claims, and employee protections in England and Wales.
An employment contract is not limited to what is written in a signed document. In UK employment law, contracts also contain implied terms-legally binding obligations that apply even if they are not expressly written or discussed.
These implied terms play a central role in regulating workplace relationships in England and Wales. They ensure minimum standards of fairness, protect both employers and employees, and fill gaps where written contracts are silent or incomplete.
The concept is primarily developed through case law, particularly decisions of the higher courts, and operates alongside express contractual terms and statutory rights.
Meaning of an Implied Term in an Employment Contract
An implied term is a contractual obligation that is not explicitly stated in the employment contract but is still legally enforceable.
In employment law, implied terms arise because:
- The law recognises certain baseline duties in all employment relationships
- The courts infer that the parties intended certain obligations to apply
- Work relationships require minimum standards of trust, cooperation, and fairness
As confirmed in leading authority, employment contracts include implied obligations designed to preserve the employment relationship and regulate conduct where the written contract is silent.
Types of Implied Terms in Employment Law
UK courts recognise several categories of implied terms. These are not optional; they arise automatically depending on the legal test applied.
1. Terms Implied by Law
These apply to all employment contracts as a matter of legal principle.
A key example is the implied term of mutual trust and confidence, which requires both employer and employee not to act in a way likely to destroy or seriously damage the employment relationship without reasonable cause.
This term is one of the most significant implied duties in UK employment law and is used frequently in claims involving:
- Constructive dismissal
- Bullying or harassment
- Unfair disciplinary action
- Breakdown of working relationships
2. Terms Implied by Fact
These apply where a term is not written down but is necessary to make the contract work in practice.
Courts may imply a term by fact where:
- It is necessary to give business efficacy to the contract
- It is so obvious that “it goes without saying”
For example, a court may imply that an employee must follow reasonable instructions from their employer, even if not explicitly stated.
3. Terms Implied by Custom and Practice
A term may also be implied where it is:
- Consistently applied in a workplace or industry
- Long-standing and well-known among staff
- Reasonably certain and not contradicted by the written contract
Examples include:
- Regular annual bonuses becoming expected
- Established overtime rates
- Long-standing working patterns (if consistently applied)
4. Terms Implied by Statute
Some implied terms arise directly from legislation, including:
- Right to receive at least the National Minimum Wage
- Right to paid annual leave under the Working Time Regulations 1998
- Protection from unlawful deductions from wages
- Health and safety obligations
These statutory terms automatically apply regardless of contractual wording.
Key Implied Terms in Employment Contracts
Mutual Trust and Confidence
The most important implied term in employment law is the duty of mutual trust and confidence.
This requires:
- Employers not to act in a way that undermines the working relationship
- Employees not to behave in a way that seriously damages trust
The principle originates from the House of Lords decision in Malik v Bank of Credit and Commerce International SA, which confirmed that this duty exists in every employment contract.
It applies across a wide range of workplace conduct, including:
- Disciplinary processes
- Grievance handling
- Changes to working conditions
- Treatment of employees during disputes
Employer Duty of Care
Employers have an implied duty to take reasonable care of employee health and safety. This includes:
- Providing a safe workplace
- Reducing foreseeable risks of injury
- Implementing safe systems of work
This overlaps with statutory health and safety obligations but also exists as a contractual duty.
Duty to Pay Wages
Even if not detailed extensively in writing, there is an implied obligation that:
- Employees will be paid for work done
- Wages will be paid properly and on time
Failure to pay wages can lead to claims for unlawful deductions and breach of contract.
Employee Duty of Fidelity
Employees owe an implied duty of loyalty, including:
- Acting in the employer's best interests during employment
- Not competing with the employer while employed
- Not misusing confidential information
- Not accepting bribes or secret commissions
This duty is particularly important in senior roles and commercial sectors.
Duty to Obey Lawful and Reasonable Instructions
Employees are generally required to follow:
- Lawful instructions
- Instructions within the scope of their role
- Reasonable management directions
Refusal may amount to misconduct depending on the circumstances.
How Implied Terms Interact with Written Contracts
Written employment contracts set out express terms, but implied terms:
- Fill gaps where the contract is silent
- Override unclear wording in some situations
- Limit how express powers can be exercised
For example, even where an employer has a contractual right to change duties or location, that power must still be exercised consistently with the duty of mutual trust and confidence.
This means contractual discretion cannot be used in a way that is arbitrary, irrational, or designed to punish an employee.
Legal Claims Arising from Breach of Implied Terms
Breaches of implied terms may lead to several types of legal claims in an Employment Tribunal or civil court, including:
1. Constructive Unfair Dismissal
Where an employee resigns due to a fundamental breach of contract, often involving:
- Breach of mutual trust and confidence
- Unreasonable treatment by the employer
2. Breach of Contract Claims
Where an employer fails to comply with implied obligations such as:
- Paying wages
- Following fair disciplinary processes
- Acting reasonably in contractual discretion
3. Unlawful Deduction from Wages
Where implied or express pay obligations are not met.
4. Discrimination or Related Claims
Although separate in law, discriminatory conduct often overlaps with breaches of implied trust and confidence.
Time Limits for Claims
Time limits vary depending on the claim type:
- Employment Tribunal claims: generally 3 months less one day from the act complained of
- ACAS Early Conciliation is required before most claims
- Breach of contract claims in civil courts: typically 6 years in England and Wales
Strict deadlines apply, and missing them may prevent a claim proceeding.
Practical Importance of Implied Terms
Implied terms are central to workplace rights because they:
- Protect employees where contracts are incomplete or vague
- Ensure minimum standards of fairness and conduct
- Provide legal remedies where workplace relationships break down
- Support claims for constructive dismissal and unfair treatment
They are especially significant in modern workplaces where job roles, policies, and expectations often change without formal contract updates.
Common Questions
Are implied terms legally binding?
Yes. Implied terms are enforceable as part of the employment contract.
Can an employer exclude implied terms?
Generally, no. Core implied terms such as mutual trust and confidence cannot be removed by contract wording.
Do implied terms apply to all employees?
Yes. They apply to all employment contracts, regardless of seniority or contract type.
Can implied terms be used in tribunal claims?
Yes. Many Employment Tribunal claims rely on breaches of implied terms.
Key Takeaways
An employment contract implied term is a legally binding obligation that exists even if it is not written in the contract. These terms arise through case law, statutory protections, and established workplace practice. The most important is the implied duty of mutual trust and confidence, which underpins fair treatment in employment relationships. Implied terms ensure that contracts operate fairly in practice and provide legal remedies where workplace conduct breaches expected standards.
