UK Employment Contract Explained: Clauses to Watch

UK employment contracts are governed by the Employment Rights Act 1996 (ERA 1996), which sets out the minimum required terms a written statement must include. Since April 2020, the statement must be issued on or before the first day of employment (previously two months). Most contracts include both the mandatory statutory terms and a range of discretionary terms specific to the employer.

This guide covers what must be in the contract, common discretionary clauses, the clauses that warrant questioning before signing, and the practical considerations around modifications to terms.

Mandatory terms under section 1 ERA 1996

Section 1 of the Employment Rights Act 1996 requires the employer to provide a written statement of employment particulars on or before the first day of employment. The statement must include: names of employer and employee, start date, pay (including pay reference period and method of calculation), hours of work, holiday entitlement, place of work, job title or brief description.

From 6 April 2020, additional information must be included: probationary period length and conditions, training entitlements, sick pay arrangements, other paid leave (parental, dependants, bereavement), pension arrangements, notice periods, and the duration if not permanent.

The statement is not the entire contract but contains the statutory minimum information. Many employers issue a more comprehensive contract document that includes the section 1 information plus additional terms. Both function as the contract; subsequent variations require agreement between employer and employee.

Worked example: an employer's offer letter and contract together cover all section 1 items: salary GBP 32,000/year paid monthly on the 28th, 37.5 hours/week with flexitime, 25 days holiday plus bank holidays, 3 months notice each side after probation, place of work London office with hybrid option, job title 'Senior Analyst', 6-month probation, contributory pension at 5%/3%, full sick pay for 3 months then SSP only.

Probation period terms

UK law has no statutory probation period; the duration and terms are entirely contractual. Typical probation periods: 3 months for entry-level roles, 6 months for mid-level, 6-12 months for senior. The contract sets the duration, the notice period during probation (often 1 week each side, less than the post-probation notice), and any conditions for confirmation.

During probation, the employee has statutory employment rights from day one (protection from unfair dismissal for automatically unfair reasons, anti-discrimination protection, right to itemised payslip, etc.). Standard unfair dismissal protection requires 2 years' continuous service, so probationary dismissals are typically not legally challenged unless an automatically unfair reason applies.

Failed probation: the employer can typically dismiss with contractual notice (often 1 week during probation). Some contracts include 'pay in lieu of notice' clauses allowing the employer to terminate immediately with payment of the notice period.

Practical action: clarifying probation period terms before signing matters. A 12-month probation with weak job security and lower pay/benefits during probation is materially different from a 3-month probation that is mostly formality. Asking specifically about probation criteria and the typical confirmation pattern provides useful information.

Notice periods and pay in lieu

Statutory minimum notice from employer to employee: 1 week during first month, then 1 week per complete year of service capped at 12 weeks. Statutory minimum from employee to employer: 1 week after first month of service. The contract typically specifies longer notice for both sides.

Common contractual notice: 1 month each side for entry-level, 3 months each side for mid-level, 3-6 months each side for senior. Some senior roles have 'gardening leave' provisions allowing the employer to require the employee to stay away from work during the notice period (and not work for a competitor).

Pay in Lieu of Notice (PILON) clauses allow the employer to terminate immediately with payment of the notice period. PILON payments are subject to PAYE and NI as employment income (the section 27A ITEPA 2003 rules from April 2018 brought all PILON within tax). Where PILON is specified in the contract, the employer's choice; where not in contract, payment in lieu may be a damages claim with potentially different tax treatment.

Worked example: an employee with 3-month notice resigns. The employer has the choice: keep the employee working through the 3 months, place them on gardening leave for 3 months (paid normally), or terminate immediately with PILON payment of 3 months' salary. Each option has different practical and tax consequences.

Restrictive covenants

Restrictive covenants are post-employment restrictions limiting where and how the employee can work after leaving. Common categories: non-compete (cannot work for a competitor for a period), non-solicitation (cannot approach the employer's clients), non-poaching (cannot recruit former colleagues), non-dealing (cannot do business with named clients).

Enforceability: covenants must be reasonable in scope, duration and geographic area. The leading case is Herbert Morris v Saxelby (1916) and subsequent decisions. Excessive covenants (12-month non-compete covering the entire UK for a junior role) are typically unenforceable. Reasonable covenants (6-month non-solicitation of clients the employee directly worked with) are typically enforceable.

The employer must have a legitimate business interest to protect (trade secrets, customer connections, workforce stability) to support enforcement. Without that interest, courts strike covenants down even where reasonable in form.

Practical action: covenants in offer letters and contracts should be reviewed carefully before signing. Excessive restrictions can be negotiated down before signing (much harder after). Employment lawyers typically review at GBP 200-500 for a contract; the cost is worth it for senior roles or where the covenants look unusually restrictive.

Bonus and discretionary payments

Bonus terms vary widely. Some contracts include guaranteed bonus (specific amount payable subject to specific conditions); some include target bonus (percentage of salary at on-target performance, with stretch above and reduction below); some include purely discretionary bonus (employer decides each year based on its own criteria).

Guaranteed bonuses are enforceable like salary - the employer must pay them if the conditions are met. Target bonuses depend on the contract wording. Discretionary bonuses are at the employer's discretion; even where conditions appear to be met, the employer can decide not to pay (though arbitrary or discriminatory exercise of discretion may be challengeable).

Bonus 'pay date' clauses often require the employee to be in employment on the payment date (not just at the bonus reference period end). An employee leaving before payment date may forfeit a bonus that was otherwise earned. This catches many employees changing jobs in early years of contract terms.

Worked example: a contract has 10% bonus 'subject to discretionary annual review and continued employment on payment date'. The employee performs strongly through the year but resigns 2 weeks before bonus payment. The bonus is typically forfeited under the wording. Timing resignations after bonus payment is the standard approach.

Variation and changes to terms

Material changes to contract terms (pay reduction, hours change, location move, benefit removal) typically require employee agreement. The legal framework treats unilateral imposition of significant adverse changes as potential breach of contract, giving the employee grounds to claim constructive dismissal (if leaving) or breach of contract damages.

Where the employer needs to make changes (organisational restructuring, response to market conditions), the standard process is consultation followed by either agreement on revised terms or dismissal and re-engagement on new terms. The latter is contentious - the Government banned 'fire and rehire' tactics in the Employment Rights Bill 2024.

Minor changes (small process adjustments, minor benefit tweaks) can typically be made unilaterally provided they fall within the employer's reasonable management discretion. The line between minor and material is fact-specific.

Practical action: changes proposed to contract terms should be reviewed and questioned where they materially affect the employee's position. Acceptance through silence or continuing to work without protest may be treated as agreement; explicit protest preserves the position.

Working time, breaks, and the 48-hour week

Working Time Regulations 1998 set maximum working hours of 48 hours per week averaged over 17 weeks. The 48-hour limit can be opted out individually by signed agreement (very common in office and professional roles). Mandatory daily and weekly rest periods apply: 11 hours' rest between working days, 24 hours' rest per week (or 48 hours per 2 weeks).

Rest breaks: a 20-minute break for shifts of 6+ hours. Some sectors have additional rest requirements (transport, healthcare). The break is unpaid unless the contract specifies otherwise; many office roles have paid lunch breaks of 30-60 minutes by convention.

Young workers (under 18): different limits apply. Maximum 40 hours per week, 8 hours per day, with longer rest periods. The Working Time Regulations have separate provisions for young workers reflecting the additional protection in EU and UK employment law for this age group.

Practical action: where the role expects 48+ hours regularly, the opt-out is typically requested at the offer stage. Reading the contract for the opt-out clause clarifies what is expected. The opt-out can be withdrawn by the employee with 7 days' notice (3 months if specified in the contract).

Implied terms and the duty of mutual trust

Beyond the express contract terms, UK employment contracts have implied terms read in by case law and statute. The most significant: the duty of mutual trust and confidence (employer must not, without reasonable and proper cause, conduct itself in a manner calculated or likely to destroy or seriously damage the relationship of trust and confidence).

Breaches of mutual trust can support constructive dismissal claims (where the employee resigns in response to the breach). Recent case law has applied the duty to: bullying or harassment by management, unfair changes to working conditions, false allegations against the employee, financial mismanagement affecting bonuses.

Other implied terms: the duty of care (employer must take reasonable care for the employee's health and safety), the duty to provide work (typically only for piece-rate and commission roles), the duty to indemnify employees for losses incurred in the course of employment.

Practical action: the implied terms cannot be overridden by express contract. Where express terms appear to permit conduct that would breach mutual trust, the implied term typically takes precedence. Where the employer's conduct is concerning, recording specific incidents with dates and witnesses preserves the position for any later claim.

TUPE: transfer of employment protections

The Transfer of Undertakings (Protection of Employment) Regulations 2006 (TUPE) protect employees whose employment transfers from one employer to another as part of a business transfer or service provision change. The employee's terms (including length of service) transfer with them; the new employer cannot unilaterally change terms post-transfer.

TUPE applies in two main scenarios: business transfer (sale of a business or part of it as a going concern), service provision change (a service contracted out to a new provider, or brought back in-house). The pre-transfer employer's obligations to the affected employees pass to the new employer.

Protections under TUPE: continuity of service for unfair dismissal qualifying period, automatic protection against dismissal solely for transfer reason, requirement to consult with employee representatives about the transfer, post-transfer protection against detriment for transfer-related reasons.

Practical action: where an employer announces a transfer (business sale, outsourcing, in-sourcing), the employee should receive information about TUPE rights from the employer. Where consultation is inadequate or terms change post-transfer in unauthorised ways, employment tribunal claims are available within the standard 3-month time limit.

Frequently asked questions

What must a UK employment contract include?

Under section 1 of the Employment Rights Act 1996: names of employer and employee, start date, pay and pay reference period, hours of work, holiday entitlement, place of work, job title or description. From April 2020 additional items: probation period, training entitlements, sick pay arrangements, parental and other leave, pension, notice periods. The statement must be issued on or before the first day of employment.

Can my employer change my contract?

Material changes (pay reduction, hours change, location move, benefit removal) typically require employee agreement. Unilateral imposition of significant adverse changes is potential breach of contract. Where the employer needs to change terms, consultation is standard; 'fire and rehire' has been restricted under recent legislation. Minor changes within reasonable management discretion can typically be made unilaterally.

What's a reasonable notice period?

Statutory minimum: 1 week during first month, 1 week per year of service from employer to employee (capped at 12 weeks). Contractual notice is typically longer: 1 month for entry-level, 3 months for mid-level, 3-6 months for senior. The contract specifies what applies; review before signing. Some senior roles have 'gardening leave' provisions during notice.

Are restrictive covenants enforceable?

Sometimes, depending on reasonableness. Covenants must be reasonable in scope, duration, geographic area, and protect a legitimate business interest (trade secrets, customer connections). Excessive covenants (12-month non-compete covering all UK for junior role) are typically unenforceable. Reasonable covenants (6-month non-solicitation of clients the employee directly worked with) are typically enforceable. Review excessive covenants before signing.

What happens if I leave before bonus payment?

Typically forfeit the bonus where the contract requires you to be in employment on the payment date. Timing resignations after bonus payment is the standard approach. Some contracts have 'pro-rata bonus on departure' clauses but these are less common. Check the contract wording; the difference between 'earned through performance' and 'subject to continued employment' matters.

Can I see my employment contract before starting?

Yes, you should request a copy of the contract before signing it as part of the offer process. UK employment law gives you the right to negotiate terms before signing. Once signed, variations require agreement. Most offers come with a contract or 'statement of employment particulars' attached; reviewing carefully and asking questions before signing is standard practice.