How to Challenge Unlawful Deduction from Salary

An unlawful deduction from salary occurs when an employer withholds wages or makes deductions from pay without a lawful basis. This is governed primarily by Part II of the Employment Rights Act 1996, which protects workers from receiving less pay than is properly due unless deductions are authorised by statute, contract, or prior written consent.

Disputes over unpaid wages, shortfalls, commission, holiday pay, or unauthorised deductions are among the most common employment tribunal claims. The legal process allows employees and workers to recover unpaid sums, along with interest in many cases.

This article explains how to identify unlawful deductions, challenge them internally, and pursue formal claims through Acas and the employment tribunal system.

What Counts as an Unlawful Deduction from Salary

Under section 13 of the Employment Rights Act 1996, an unlawful deduction occurs where:

• The employer pays less than the “properly payable” wages, or
• Makes a deduction from wages without legal authority

A deduction is unlawful unless it is:

• Required by statute (for example, tax or National Insurance)
• Expressly authorised in the employment contract
• Agreed in advance in writing by the worker

If none of these apply, the shortfall is treated as a deduction from wages.

Typical examples include:

• Non-payment of wages or salary
• Underpayment of hourly rates or overtime
• Unpaid commission or bonuses where contractually due
• Unauthorised deductions for training costs, till shortages, or equipment
• Incorrect holiday pay calculations
• Withholding final pay after resignation or dismissal

Employment tribunals regularly treat ongoing underpayments as a “series of deductions”, which can affect time limits.

Legal Framework

The key legal provisions include:

• Employment Rights Act 1996, sections 13–27 (unauthorised deductions from wages)
• Case law interpreting “wages properly payable”
• Acas Code of Practice (relevant where internal procedures or disputes arise)
• Employment tribunal procedural rules

Under section 23 of the Employment Rights Act 1996, workers can bring a claim to an employment tribunal for unlawful deductions, including multiple deductions forming a continuous pattern.

The tribunal can order:

• Repayment of unpaid wages
• Interest on sums awarded
• Adjustments for ongoing underpayment patterns

There is no minimum service requirement to bring a claim.

Step-by-Step: How to Challenge an Unlawful Deduction from Salary

1. Identify the Nature of the Deduction

The first step is to establish:

• What has been deducted or withheld
• Whether the amount is clearly due under contract or law
• Whether any contractual clause authorises the deduction

Evidence may include:

• Employment contract
• Payslips
• Timesheets or rota records
• Commission statements
• Payroll correspondence

A deduction may be challenged even if the employer labels it as a “penalty” or “administrative charge” if it is not contractually permitted.

2. Raise the Issue Informally or Internally

Most disputes begin with internal resolution. This typically involves:

• Contacting payroll or HR in writing
• Asking for a breakdown of the calculation
• Requesting correction of errors or repayment

Employers are expected to respond promptly and explain how pay has been calculated. Many disputes are resolved at this stage without formal proceedings.

If the employer has a grievance procedure, it may also be used to escalate the issue.

3. Submit a Formal Written Complaint

If the issue is not resolved informally, a formal written complaint should be made.

A structured complaint normally includes:

• Details of the deductions or underpayment
• Dates and pay periods affected
• Contractual or statutory basis for entitlement
• Request for repayment and correction of payroll records

Clear documentation is important, as tribunal claims rely heavily on pay evidence.

4. Consider ACAS Early Conciliation

Before issuing a tribunal claim, it is mandatory to notify Acas and begin early conciliation.

This process:

• Is required for most employment tribunal claims
• Temporarily pauses limitation periods
• Provides an opportunity to settle disputes without a hearing

If settlement is not reached, Acas issues a certificate allowing a tribunal claim to proceed.

Further guidance is available via Acas Employment Tribunal guidance Acas.

5. Submit an Employment Tribunal Claim (ET1)

If the issue remains unresolved, a claim can be filed in the employment tribunal using form ET1.

Key points:

• The claim is usually for “unlawful deduction from wages”
• The tribunal examines payslips, contracts, and payroll evidence
• Claims can include a series of deductions over time

The tribunal is independent and operates as a judicial body dealing with employment disputes in England and Wales.

Claims must usually be submitted within strict time limits (see below).

Time Limits for Claims

The general rule is:

• 3 months minus 1 day from the date of the deduction or last in a series of deductions

Where deductions form a continuing pattern, time may run from the final underpayment in the series.

Important procedural rules:

• ACAS early conciliation pauses the limitation clock (if started in time)
• Internal grievances do not extend tribunal deadlines
• Tribunals apply time limits strictly, subject to limited exceptions

This is set out in the Employment Rights Act 1996 and tribunal procedural guidance.

Evidence in Unlawful Deduction Claims

Strong claims are supported by documentary evidence such as:

• Payslips showing discrepancies
• Employment contract terms on pay
• Bank statements showing actual payments received
• Timesheets and rota records
• Employer emails confirming pay rates or deductions

Where payroll records are incomplete or inconsistent, tribunals may rely on the employee's evidence if credible and supported by documents.

Common Defences by Employers

Employers may argue that deductions are lawful because:

• They are required by tax or statutory rules
• The contract permits deductions (for example, training costs or uniform)
• There was an overpayment that is being recovered
• The worker agreed to the deduction in writing
• The claim is out of time

Each defence is assessed against the contract terms and statutory requirements.

Risks and Practical Considerations

1. Time Limit Risk

Missing tribunal deadlines can prevent recovery, even where the deduction is clearly unlawful.

2. Ongoing Employment Relationships

Bringing a claim may affect working relationships, particularly where the employment continues.

3. Partial Evidence Issues

Incomplete records can weaken claims, especially where pay varies (commission, overtime, or variable hours).

4. Series of Deductions Complexity

Multiple underpayments may need careful legal framing as a continuous series.

Enforcement of Tribunal Awards

If a tribunal upholds a claim but payment is not made, enforcement options include:

• County Court enforcement of the judgment
• Interest on unpaid sums
• Additional enforcement fees
• In some cases, insolvency procedures if the employer cannot pay

Common Questions

Can I claim if I am still employed?

Yes. Claims for unlawful deductions can be brought during employment or after it ends.

Is there a minimum service requirement?

No. Protection applies from day one of employment.

Can verbal agreements justify deductions?

Generally no, unless clearly evidenced and lawful under contract or statute.

Can multiple pay issues be combined?

Yes. A series of deductions can be grouped into one tribunal claim if connected.

Key Takeaways

Challenging an unlawful deduction from salary involves identifying the unpaid or reduced wages, raising the issue internally, and pursuing formal resolution where necessary. If unresolved, the dispute can be taken through Acas early conciliation and then to an employment tribunal.

Key points:

• Deductions must be authorised by law, contract, or written consent
• Claims can cover single or series of underpayments
• Strict time limits apply (usually 3 months minus 1 day)
• Evidence from payslips and contracts is central
• Tribunals can order repayment plus interest