What was introduced to Parliament as the Employment Rights Bill in October 2024 is no longer a bill at all. It received Royal Assent on 18 December 2025 and is now the Employment Rights Act 2025, the most significant overhaul of UK employment law in a generation. For small employers, most of whom manage HR obligations without a dedicated specialist, the practical question has moved on from whether these changes are coming to which provisions are already in force, which arrive later this year, and which are still working through consultation before anyone knows the final detail.
Some parts of the Act took effect from April 2026 and already apply to every employer. Others, including the most talked-about change to unfair dismissal, are not due until January 2027. A few, including the zero-hours contract reforms, are still being consulted on and are unlikely to arrive before 2027 at the earliest.
What Has Already Changed, From April 2026
Statutory Sick Pay reform is already in force. From day one of a sickness absence, employees are now entitled to SSP, removing the three-day waiting period that previously meant no payment for the first three days off sick. The lower earnings limit that previously excluded the lowest-paid workers from SSP altogether has also been removed, with a tapered rate applying to those earning below the threshold rather than excluding them entirely.
Day-one rights to paternity leave and unpaid parental leave also came into force from April 2026, removing the qualifying periods that previously applied to both. Employers should already have updated payroll systems, absence policies and new starter documentation to reflect these changes; any business that hasn’t is currently out of step with the law rather than simply preparing for a future change.
The Unfair Dismissal U-Turn, and What Actually Happens From January 2027
The most widely discussed proposal in the original Bill was day-one protection against unfair dismissal, removing the two-year qualifying period entirely. That did not happen. During the Bill’s passage through Parliament, the government dropped the day-one commitment following discussions with business groups and, instead, the Act reduces the qualifying period from two years to six months. This change is confirmed to take effect from 1 January 2027, alongside the removal of the current statutory cap on unfair dismissal compensation, which materially increases the potential financial exposure of a successful claim against an employer.
For small employers, the practical effect is a shorter but still meaningful buffer during which new hires can be dismissed without needing to demonstrate a fair reason and a fair process in the way a full unfair dismissal claim would require.
Six months is still enough time to assess whether a new hire is working out, but considerably less than the two years employers have planned around until now, and hiring and early-stage performance management processes built around a two-year buffer need reviewing before January 2027 arrives. The Act also specifies that the qualifying period can only be changed in future by a fresh Act of Parliament rather than by a simple change of government policy, which gives employers a more stable planning horizon than the qualifying period has had in recent years.
A related change extends the time limit for bringing most employment tribunal claims, including unfair dismissal, from three months to six months from the date of termination, expected to take effect from 1 October 2026, though the confirming regulations were still awaited at the time of writing. This gives departing employees considerably longer to bring a claim, which means employers may need to retain dismissal-related records and evidence for longer than they currently do to be able to respond effectively to a claim brought well after the event.
Zero-Hours and Low-Hours Contract Reforms: Still Being Worked Out
The Act creates a right for qualifying workers on zero-hours and low-hours contracts to be offered guaranteed hours reflecting the hours they actually work over a reference period, along with rights to reasonable notice of shifts and payment when a shift is cancelled, moved, or cut short at late notice. Unlike the SSP and dismissal changes, the detail of how these rights will actually work has not been settled.
The government opened a formal consultation on the implementation detail in June 2026, covering questions such as how long the reference period should be, which workers count as qualifying, and how the calculations should work in practice. That consultation closes in late August 2026, after which the government will develop the regulations that actually bring the reforms into force. Most employment lawyers following the process expect the zero-hours measures will not take effect before 2027, and some now consider the latter half of 2027 more realistic given the complexity involved.
For small employers in hospitality, retail, and care, sectors that rely heavily on zero-hours and variable-hours arrangements, this is worth tracking closely even though nothing is mandatory yet. Businesses that wait until the regulations are finalised to start reviewing their scheduling practices and workforce cost models will have considerably less time to adjust than those that begin mapping their current exposure now, particularly around how many workers would qualify for a guaranteed hours offer and what that would mean for staffing costs during quieter trading periods.
Fire and Rehire, and Other 2027 Changes
The Act also restricts the practice known as fire and rehire, where an employer dismisses an employee and re-engages them on less favourable terms to force through a contractual change. Restricted variations, including reductions in pay or holiday entitlement and changes to working hours, will generally not be permitted using this route except where there is genuinely no viable alternative to keep the business afloat, with this restriction expected to take effect from January 2027 alongside the unfair dismissal changes.
Businesses that have historically used contract variation as a tool for managing costs or restructuring need to plan any significant changes to terms well before this restriction lands, since negotiated agreement will become the only reliable route once it is in force.
What This Means Across the UK and Ireland
The Employment Rights Act 2025 applies across Great Britain. Northern Ireland operates its own devolved employment law framework and is not automatically bound by changes made at Westminster, so employers with staff in Northern Ireland need to check Northern Ireland’s own legislative position rather than assume GB reforms apply there directly. The Republic of Ireland has an entirely separate legal system for employment rights, including its own protections around flexible working and work-life balance introduced through the Work-Life Balance and Miscellaneous Provisions Act 2023.
A business employing people in Great Britain, Northern Ireland, and the Republic is, in effect, managing three separate and only partially overlapping sets of employment obligations, and treating any one jurisdiction’s rules as a template for the others is a common and avoidable mistake.
What Small Employers Should Do Now
Given how staggered the implementation timetable is, the practical priority list looks different depending on where a business sits. Employers should already have SSP, paternity leave and parental leave policies updated to reflect the changes already in force since April 2026. The next planning priority is the January 2027 unfair dismissal and fire-and-rehire changes, since six months is not a long runway to review hiring processes, probation and performance management procedures, and contract variation practices before those provisions land.
Zero-hours and guaranteed hours reforms remain the least certain in terms of timing and detail, but businesses with a meaningful proportion of variable-hours staff have the most to gain from starting to model their exposure now rather than waiting for final regulations. ACAS and gov.uk remain the authoritative sources for confirmed commencement dates as individual provisions come into force, and are worth checking periodically given how many of the Act’s dates have already shifted once since the original roadmap was published.
FAQs
Has the Employment Rights Bill become law?
Yes. It received Royal Assent on 18 December 2025 and is now the Employment Rights Act 2025. It is fully law, though most of its individual provisions are being brought into force in stages through 2026 and 2027 rather than all at once.
Do employees now have unfair dismissal protection from day one?
No. The government dropped that proposal before Royal Assent. Instead, the qualifying period for ordinary unfair dismissal claims reduces from two years to six months, taking effect from 1 January 2027, alongside removal of the cap on compensation.
Is Statutory Sick Pay from day one already in force?
Yes. This change took effect from April 2026, removing the previous three-day waiting period and the lower earnings limit that excluded the lowest-paid workers, with a tapered SSP rate now applying below that threshold.
When will the zero-hours contract reforms take effect?
Not yet, and not soon. A government consultation on the implementation detail closed in late August 2026, and most employment lawyers following the process expect the actual reforms will not come into force before 2027, with some suggesting the latter half of 2027 is more likely given the complexity of the detail still to be settled.
Does the Employment Rights Act apply in Northern Ireland or Ireland?
No, not directly. The Act applies to Great Britain. Northern Ireland has its own separate, devolved employment law framework, and the Republic of Ireland operates an entirely different legal system, including its own work-life balance legislation. Employers with staff across more than one of these jurisdictions need to check each one’s requirements separately rather than assuming any single set of rules covers them all.
