Your essential guide to the changes and what you need to do to stay compliant.
The Employment Rights Act 2025 became law in December 2025. The Act will be implemented in stages, with the key changes coming into effect between 6 April 2026 and Autumn 2027. The impact will be a new employment law landscape.
This briefing outlines the 6 April 2026 changes, future key changes, the impact on employment contracts and handbooks and provides a summary of the full government implementation timeline for all key changes.
Employers will be required to take ‘all reasonable steps’ to prevent the sexual harassment of their employees, with the minimum requirements expected to be published in the course of 2027.
Protection from third party harassment will also apply — employers will be exposed to claims if employees are harassed by a third party in the course of their employment and they cannot show that they have taken all reasonable steps to prevent this. The obligation extends to all forms of harassment, not just sexual harassment.
Most employment tribunal claims must currently be lodged within 3 months. This time limit will be extended to 6 months.
An employee must make an Acas early conciliation application before making a claim to the employment tribunal. Provided an Acas early conciliation application is made within the employment tribunal time limit, Acas early conciliation ‘stops the clock’ and operates to extend the time limit for submission of the employment tribunal claim.
The maximum period of Acas early conciliation was extended from 6 weeks to 12 weeks in December 2025.
The qualifying period to bring an unfair dismissal claim will reduce from just under two years to 6 months, effective from 1 January 2027. Employees with at least 6 months’ service as at 1 January 2027 will be able to make a claim — service prior to January 2027 will count.
Restrictions on making certain changes to an employee’s terms and conditions will come into effect, along with protection from dismissal for refusing to agree to changes. Pre-existing contractual rights to make changes are permitted but introducing a right to make changes after January 2027 will be restricted. Dismissing an employee for refusing to agree to a ‘restricted variation’ will become automatically unfair (with limited exceptions). The risk is not limited to actual dismissal — it includes constructive dismissal.
A right for qualifying workers on zero hours contracts to be offered guaranteed hours will be introduced, calculated using a set ‘reference period’ (duration yet to be determined). This creates difficulties if the reference period is an unusually busy period for an employer.
The worker does not have to accept the offer; and they don’t have to ask for this if they don’t want it. These changes are likely to have a significant impact on employers who engage workers on zero hours contracts and on employment businesses who supply temporary workers. A separate employment business-focused update will be issued later this year.
The Act will make it unlawful to dismiss pregnant women, mothers on maternity leave, and mothers who return to work for at least a 6-month period after they return, save for in specific circumstances. The consultation closed on 15 January 2025. The current ‘protection’ is limited to priority for alternative employment in a redundancy situation; the new provisions will prevent dismissal for a specified period and will be a significant reform.
The reforms do not introduce a right to work flexibly; they bolster the existing right to make a request to work flexibly by introducing a reasonableness test and a new consultation process. The existing eight business reasons for rejection will continue to apply but if an employer is considering rejecting a request, they must consult (following a process which will be finalised following conclusion and analysis of the consultation) and if they reject a request, they must explain why their decision is reasonable. The consultation process will close on 30 April 2026.
For more information see Flexible working factsheet
The first roadmap for implementation was issued by the Government in July 2025. The Government has now published an updated implementation timeline for the key changes. The timeline as at the date of issue is as follows: