ACAS early conciliation now extended to 12 Weeks: Key considerations for employers and employees

From 1 December 2025, the maximum duration of ACAS Early Conciliation period has increased from six weeks to twelve weeks. This has practical implications for how workplace disputes are handled before they reach the Employment Tribunal, beyond the longer period of the ‘clock being stopped’ before the issuing of proceedings to the Employment Tribunal.

This article looks at what the change means in practice and highlights some of the advantages and potential drawbacks for both employers and employees.

A brief reminder: what is Early Conciliation?

Before most Employment Tribunal claims can be issued, the prospective claimant must notify ACAS. ACAS will then act as a neutral intermediary, helping the parties explore resolution concluding with a settlement.

Participation in discussions is voluntary, but the notification step itself is mandatory. Importantly, the tribunal limitation clock is paused during the conciliation period.

Why extend the conciliation period?

The increase reflects a recognition that workplace disputes are not always capable of resolution within a relatively short timeframe. In many cases, parties need time to gather information, take advice, and consider their position carefully.

There has also been sustained pressure on the tribunal system in recent years and even on ACAS itself. A longer conciliation window is intended, at least in part, to encourage more disputes to settle before reaching that stage, affording the parties meaningful time to do so once the administrative process is handled and an ACAS conciliator is appointed to the case.

Potential advantages

More time to reach agreement

An extended timeframe can make negotiations more realistic. Six weeks could pass quickly, particularly where one or both parties were slow to engage or needed time to obtain legal or internal input.

With twelve weeks available, there is greater scope to explore settlement options in a more measured way.

Better-informed decision-making

For employees, the additional time can be valuable in understanding their legal position and potential remedies by having the time to obtain advice, if needed. This is particularly relevant in more complex claims, such as discrimination or whistleblowing.

Employers, meanwhile, have a longer window to investigate allegations, assess potential exposure, and consider how a dispute fits within wider organisational priorities.

Reduced need for protective claims

Previously, some claimants issued tribunal proceedings simply to avoid missing limitation deadlines, even where settlement discussions were ongoing, once the mandatory conciliation period ended.

A longer conciliation period may reduce the need for this “protective” approach, allowing parties to focus on resolution before litigation is commenced and reducing strain on the tribunals.

Greater flexibility in negotiations

In practice, settlement discussions do not always progress in a linear way. The extended timeframe allows for pauses, renewed engagement, and more considered offers and effort, which may increase the likelihood of settlements

Potential disadvantages

Prolonged uncertainty

One of the most immediate consequences of the change is that disputes may remain unresolved for longer.

For employers, this can mean extended periods of uncertainty affecting:

• workforce planning;
• budgeting; and
• internal management time.

For employees, the delay may prolong financial and personal uncertainty following the end of employment.

Delay in progressing claims

Where settlement is unlikely, a longer conciliation period may simply postpone the inevitable step of issuing tribunal proceedings.

This can have knock-on effects, including:

• slower access to a final outcome; and
• practical difficulties in preserving evidence over time (e.g. documents not longer being preserved or memories fading due to the passing of time).

Risk of disengagement

More time does not automatically lead to more productive discussions. Without active engagement from both sides, there is a risk that the process becomes passive, with little meaningful progress.

In some cases, a shorter timeframe can encourage focus and momentum.

Tactical considerations

The extended period may also influence how parties approach the process strategically. For example, one side may take a slower approach to negotiations, or use the additional time to reassess options outside of the conciliation framework.

While this will not arise in every case, it is a factor both employers and employees should keep in mind

Practical takeaways

For employers:

• Treat Early Conciliation as an active process rather than a waiting period;
• Use the additional time to investigate thoroughly and obtain appropriate advice;
• Consider early settlement where it aligns with commercial and reputational objectives.

For employees:

• Take the opportunity to understand the strengths and risks of your claim;
• Engage constructively with the process where settlement is a realistic option;
• Be mindful of how delay may affect both timing and outcome.

Conclusion

Extending ACAS Early Conciliation to twelve weeks introduces greater flexibility into the pre-claim process. In many cases, this will provide a more realistic window for meaningful discussions and informed decision-making.

As with many procedural reforms, its effectiveness will depend less on the rule itself and more on how it is used in practice. For both employers and employees, a proactive and considered approach to conciliation will remain key.

For tailored advice on navigating Early Conciliation or responding to a potential claim, please contact our employment law team.