ACAS uplift: when tribunals increase compensation
When employment tribunals increase compensation for unreasonable failures to follow the ACAS Code, how the uplift is assessed, and when it is unlikely to apply.
ACAS Code mentioned
1,086
decisions mention the ACAS Code, s.207A, or closely related Code wording in a 18,813-decision audit snapshot
Explicit uplifts
76
cases had a clear employer-side ACAS uplift percentage extracted from the judgment text
Average uplift
18.4%
mean uplift across the 76 cases with an explicit extracted percentage
Median uplift
20%
the midpoint of the extracted uplift percentages; the statutory maximum remains 25%
What the database shows
Tribunal Intel ran a text audit over 18,813 indexed published decisions. We found 1,086 decisions that discuss the ACAS Code or the statutory uplift/reduction power. A likely employer-side uplift was detected in 81 of those, with 76 giving an explicit percentage.
That means explicit ACAS uplifts are visible in about 1.7% of claimant-successful or partially-successful decisions in this snapshot. They are not routine: most ACAS Code mentions are issue lists, legal background, refused adjustments, or claimant-side reduction arguments rather than an actual increase to compensation.
How large are the uplifts?
The most common extracted uplift was the maximum 25%, appearing in 32 of the 76 explicit-percentage cases.
Where do they occur?
The theme counts overlap. A single case can involve unfair dismissal, a grievance, and disciplinary failings. The point is directionally clear: uplifts cluster around ordinary process failures, not exotic legal points.
What an ACAS uplift is
An ACAS uplift is an increase to compensation where an employment tribunal finds that a party unreasonably failed to follow the ACAS Code of Practice on disciplinary and grievance procedures. The same framework can also reduce compensation where the unreasonable failure was by the worker.
In practical terms, the uplift is about process. It is not a separate claim and it is not a fine. It is an adjustment to compensation after the tribunal has already decided that compensation is payable.
The statutory limit is 25%. That does not mean every breach produces a 25% increase. Tribunals usually ask how serious the failure was, whether it made the process unfairer, and whether an increase is proportionate.
When tribunals increase compensation
The common pattern is simple: the employer had a disciplinary or grievance issue to handle, the ACAS Code was relevant, and the tribunal concludes that the employer's failure to follow it was unreasonable. That can happen even if the tribunal also finds that the dismissal or treatment was unfair for other reasons.
The strongest uplift arguments usually involve basic procedural failures. A worker was not told clearly what they were accused of, was not given the evidence, was denied a meeting, was dismissed before the employer had properly investigated, or was not offered a real appeal.
Grievances matter too. If an employee complains about discrimination, harassment, pay problems, whistleblowing retaliation, or other serious workplace treatment, and the employer simply ignores the grievance or deals with it superficially, the tribunal may treat that as an unreasonable failure to follow the Code.
The failures that tend to matter
No meaningful investigation
The employer moves straight to a disciplinary outcome without properly establishing what happened or giving the employee a fair chance to respond.
No disciplinary or grievance meeting
The process is decided on paper, by message, or informally, where the Code would normally expect a meeting before a final decision.
No appeal
The employer dismisses, disciplines, or rejects a grievance without offering a real opportunity to appeal to someone sufficiently independent.
Ignoring a formal grievance
A worker raises a grievance about treatment at work and the employer fails to deal with it through a reasonable grievance process.
How the percentage is chosen
Tribunals do not use a fixed tariff. They normally start by deciding whether the Code applied and whether the failure was unreasonable. If so, they consider what percentage increase is just and equitable.
Serious, deliberate, or wholesale failures can justify a higher uplift. Technical or limited failures tend to produce a lower uplift, or no uplift at all. The tribunal may also consider whether the employer is small, whether advice was available, and whether the claimant contributed to the procedural problem.
When an uplift is unlikely
An uplift is unlikely where the ACAS Code does not apply, where compensation is not being awarded, or where the process was imperfect but not unreasonably so. It can also fail where the complaint is really about redundancy consultation, capability management, or another process outside the core disciplinary and grievance framework.
The uplift is also not a shortcut around causation. If the tribunal awards no compensation under the relevant claim, there may be nothing meaningful to increase.
How to use this in a case
For claimants, the practical question is evidence. Keep the grievance, disciplinary invitation, dismissal letter, appeal request, appeal outcome, notes of meetings, emails, and messages. The uplift argument is usually built from the gap between what happened and what the Code expected.
For employers, the safest route is boring but effective: tell the worker the issue, disclose the evidence, hold a meeting, allow a companion where required, give reasons, and provide a genuine appeal. A clean process does not guarantee a win, but it reduces uplift risk.
Practical checklist
- The uplift is about procedural behaviour, not the underlying value of the claim.
- It usually matters most in unfair dismissal, discrimination, whistleblowing, and other claims where compensation is awarded.
- The tribunal asks whether the failure was unreasonable, then decides whether an uplift is just and equitable.
- The maximum uplift is 25%, but many awards are lower because the tribunal assesses seriousness and proportionality.
Next steps
Use the uplift carefully in a loss estimate
If the ACAS Code applies, treat the uplift as an adjustment to the award rather than a standalone head of loss. It often sits alongside other adjustments, especially Polkey and contributory fault, so the order in which reductions and uplifts are applied can materially change the final figure.
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