8 Common Payroll Mistakes Made After Minimum Wage Increases

For business owners, minimum wage rises are straightforward in theory but in practice, they often trigger errors that can lead to underpayments, HMRC penalties, or unhappy employees. That’s why it’s important for business owners to not make these top payroll mistakes made after minimum wage increases.

Here are the mistakes UK employers most commonly make after a rate change:

 

PAYROLL ERROR 1 – Applying the New Rates on the Wrong Date

Minimum wage changes apply from the start of the first pay reference period on or after the effective date.

Many businesses incorrectly apply the new rates mid-period or delay them until the next payroll cycle.

 

PAYROLL ERROR 2 – Not Updating Age-Band Changes

Employees move into new wage bands automatically when they reach 16, 18, 21, or leave apprenticeship status.

A birthday can shift an employee into a higher minimum wage category, but employers often forget to make the adjustment.

 

PAYROLL ERROR 3 – Incorrect Apprenticeship Rate Usage

Businesses frequently:

• Pay the apprentice rate beyond the first year despite the apprentice being over 19, or
• Apply the apprentice rate when the employee isn’t in an approved apprenticeship.

Both can result in underpayment breaches.

 

PAYROLL ERROR 4 – Overlooking Changes to Allowances and Deductions

If your business provides accommodation, uniforms, meals, or deductions for equipment, these can affect NMW compliance.

Improper deductions can bring take-home pay below minimum wage without the employer realising.

 

PAYROLL ERROR 5 – Failing to Update Payroll Software or Systems

Manual spreadsheets or outdated payroll software are a big risk point.

If systems aren’t updated or tested properly, employees may continue receiving last year’s wages.

 

PAYROLL ERROR 6 – Miscalculating Time Worked

Common errors include:

• Not counting time spent on mandatory training
• Missing travel time between client locations
• Rounding hours incorrectly

These can all lead to underpayment.

 

PAYROLL ERROR 7 – Ignoring Salary-Sacrifice Impacts

Benefits such as childcare vouchers, pensions, or cycle-to-work schemes can reduce an employee’s cash pay.

If salary sacrifice brings them below the new minimum wage, the arrangement becomes non-compliant.

 

PAYROLL ERROR 8 – Poor Record-Keeping

HMRC requires clear, accurate records for at least six years. Missing or incomplete data can cause compliance issues even if you paid correctly.

 

 

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