The Employment Rights Act 2025 Is Now Law
What Employers Need to Know
On 18 December 2025, the Employment Rights Bill received Royal Assent and became the Employment Rights Act 2025. It's been described as the most significant overhaul of UK employment law in a generation, and for HR teams, it marks the start of a long implementation period rather than a single moment of change.
What's actually happening now
It's worth being clear about what Royal Assent does and doesn't mean. The Act is now on the statute book, but the vast majority of its provisions are not yet in force. Implementation is phased across 2026 and 2027, with many measures still subject to consultation before the detail is finalised. A small number of changes took effect immediately — the repeal of the Strikes (Minimum Service Levels) Act 2023 among them — but for most employers, nothing changes in your day-to-day obligations this week.
The headline changes coming down the track
Some of the most significant reforms employers should start preparing for include:
A shorter qualifying period for unfair dismissal. Protection will apply after six months of service rather than two years — a change from the government's original "day one" proposal, but still a major shift for recruitment, probation, and performance management processes.
Removal of the cap on unfair dismissal compensation, increasing the financial exposure of getting dismissals wrong.
Fire and rehire becoming automatically unfair in most circumstances, with limited exceptions for genuine financial necessity.
Day-one rights to paternity leave and unpaid parental leave.
Sick pay reform, removing the waiting period and earnings threshold.
A stronger duty on employers to prevent sexual harassment, including liability for harassment by third parties such as customers and clients.
A new Fair Work Agency, consolidating enforcement of employment rights under one body.
Simplified trade union recognition and industrial action rules.
Why "phased" doesn't mean "later problem"
It's tempting to file this away as a 2027 issue. That would be a mistake. Recruitment decisions made now, probation processes designed today, and disciplinary or performance frameworks being reviewed this quarter will all still be in use when the shorter qualifying period and uncapped awards come into force. Building processes now that will hold up under the new rules is considerably cheaper than reworking them under pressure later.
What good preparation looks like
Over the coming year, we'd encourage employers to:
Review probation and early-service performance management processes, since a fair, well-documented process during the first six months will matter far more once the qualifying period shortens.
Audit disciplinary and grievance procedures against the Acas Code, ensuring independence and thoroughness are built in, not assumed.
Keep an eye on the government's rolling consultations — much of the fine detail, including the sexual harassment "reasonable steps" regulations, is still being worked out.
Build relationships with independent, external investigators now, rather than scrambling to find one when a claim under the new rules is already underway.
The Employment Rights Act 2025 isn't a single deadline — it's a multi-year shift in how much employers need to get right, and how early. We'll be tracking each stage of implementation on this blog as it happens.
Blue Rock Investigations helps UK employers build robust, independent investigation and grievance processes that stand up to the Employment Rights Act 2025's tightening standards.
