Unfair Dismissal Changes 2026: What UK Employers Must Do Now

One of the most significant shifts in UK employment law is the proposed reform to unfair dismissal rights.

For decades, many employers have relied on qualifying service thresholds before employees gained full unfair dismissal protection. This created a degree of flexibility during the early stages of employment, particularly during probation. That position is changing.

The Employment Rights reforms introduced in 2026 mark a clear move towards earlier employee protection, greater employer accountability, and increased scrutiny on workplace process.

For SMEs, this is not simply a legal technicality. It fundamentally changes how employers approach recruitment, onboarding, probation, performance management, investigations, and dismissal.

Businesses that continue relying on informal early-employment management are becoming increasingly exposed.

Broadly, unfair dismissal arises where an employer dismisses an employee and cannot demonstrate:

✓ a fair reason for dismissal
✓ a fair process
✓ that dismissal was a reasonable response

All three are required.

This means:

being “right” is not enough. You must also act fairly.

The overall direction of reform is clear:

Earlier dismissal protection

Employees gain stronger legal protections much earlier in employment.

For employers, this significantly reduces the perceived “low-risk” early employment window.

Historically, some businesses treated probation as a relatively flexible exit route.

That approach is becoming increasingly risky.

Greater scrutiny on employer process

Tribunals and regulators are placing greater weight on:

• investigation quality

• manager decision-making

• documentation

• consistency

• fairness of process

Dismissal decisions will increasingly be judged by process quality, not simply outcome.

Increased overlap with day-one rights

The April 2026 reforms also expanded:

• SSP rights

• family leave rights

• whistleblowing protections

• anti-retaliation protections

This creates additional dismissal risk where employment action overlaps with statutory rights.

This is the biggest misunderstanding many SMEs still have.

Probation is often treated as: “If it is not working out, we can simply end employment.”

That mindset is becoming outdated.

Even early employment exits increasingly require:

✓ clear standards
✓ documented concerns
✓ meetings
✓ reasonable opportunity to improve (where appropriate)
✓ fair explanation
✓ documentation of decisions

This is particularly important for:

• performance concerns

• attendance concerns

• conduct concerns

• culture fit concerns

Poorly handled probation exits are likely to generate more claims.

The practical bar is rising in five key areas:

1) Recruitment decisions

Hire carefully — poor recruitment creates downstream dismissal risk.

2) Strong contracts

Contracts should clearly set expectations, probation terms, notice, conduct standards, and policy framework.

3) Better onboarding

Clear expectations from day one reduce later disputes.

4) Manager capability

Line managers need confidence handling difficult conversations early.

5) Documentation

Evidence will increasingly determine defensibility.

The businesses most exposed tend to:

❌ rely on verbal feedback only
❌ avoid documenting issues
❌ skip investigations
❌ rush dismissals
❌ act inconsistently
❌ ignore mitigating circumstances
❌ overlook discrimination risk
❌ treat probation casually

Immediate priorities:

Review contracts

Ensure probation wording is clear.

Update disciplinary procedures

Process standards matter more than ever.

Introduce probation review structure

30 / 60 / 90-day review points.

Train managers

Especially on conversations, evidence, and documentation.

Improve investigation capability

Early fact-finding reduces risk.

Audit policies

Ensure day-one rights are reflected.

Ask:

✓ Do managers understand fair process?
✓ Are probation reviews documented?
✓ Are concerns raised early?
✓ Are investigations structured?
✓ Are policies updated?
✓ Is dismissal rationale documented?

If not, your risk is rising.

The 2026 unfair dismissal reforms are not simply changing employee rights.

They are changing how employers must manage people from day one.

For SMEs, the businesses that adapt early will reduce risk significantly.

Those relying on informal management will become increasingly exposed.

Good HR is becoming less optional — and more commercial protection.