Members of a Trade Union (i.e. employees and workers) pay fees to the Trade Union usually referred to as ‘dues’ or subscriptions. The amount due may vary from Trade Union to Trade Union and salary/job role. Such payments can be deducted from an employee’s pay and paid to the Trade Union by the employer in a process referred to as ‘Check Off’. The link below provides guidance for employers in making such deductions.
Employers - Payment of Union Subscriptions by ‘Check off’
Employees- Trade union subscriptions