UK Employment Law Changes 2025: What Every Employer Needs to Know

The Employment Rights Bill, introduced in late 2024, is set to deliver the most significant overhaul of UK employment law in decades. For employers, this isn't something to address later — the changes will fundamentally alter how you hire, manage, and part ways with employees.

Key Changes Coming Into Effect

Day-One Unfair Dismissal Rights

Perhaps the most impactful change: the removal of the two-year qualifying period for unfair dismissal claims. Once enacted, employees will have protection from unfair dismissal from their first day of employment. Employers will still be able to use probationary periods — a statutory probation period of up to nine months is proposed — but the threshold for a fair dismissal during probation will be different from the current approach of simply waiting out qualifying service.

Flexible Working as a Default Right

Flexible working has already shifted from a right to request after 26 weeks to a day-one right. The Bill goes further, requiring employers to demonstrate that refusing a request is reasonable based on specific business grounds. Simply saying "it doesn't suit the business" will no longer be sufficient.

Zero-Hours Contract Reforms

Workers on zero-hours and low-hours contracts will gain the right to a guaranteed-hours contract reflecting their regular working pattern. This applies after a defined reference period and means employers relying heavily on zero-hours arrangements will need to restructure their workforce planning.

Restrictions on Fire and Rehire

The practice of dismissing employees and re-engaging them on less favourable terms will be treated as automatically unfair dismissal, except where the employer can demonstrate genuine financial difficulty threatening the viability of the business. This is a substantial narrowing of a tactic some employers have relied upon.

Enhanced Protections for New Parents

Pregnant employees and those returning from maternity, adoption, or shared parental leave will receive strengthened protections against redundancy and dismissal for an extended period after their return to work.

What Employers Should Do Now

• Review all employment contracts — Ensure your contracts are robust enough to support fair processes under the new framework. Our contracts and handbooks service can help.
• Update your employee handbook — Policies on probation, flexible working, and dismissal procedures will all need revising.
• Train line managers — Managers need to understand that day-one rights change the dynamics of performance management and probation reviews.
• Audit your workforce structure — If you rely on zero-hours contracts, start planning now for guaranteed-hours obligations.
• Seek professional advice — With changes this significant, professional employment law guidance is essential, not optional.

The Employment Rights Bill isn't a distant concern — it demands action today. Employers who wait until enforcement will find themselves exposed to claims they could have prevented.

At Infinity HR, we're already helping businesses prepare for these changes. Get in touch for a free consultation to review your readiness.