Payroll outsourcing services UK involve contracting external professionals or firms to manage payroll functions on behalf of businesses. These services include tasks like employee salary processing, tax calculations, compliance with UK payroll regulations, generating payslips, and handling payroll-related reporting. Outsourcing payroll services in the UK can lead to cost savings, accuracy, compliance with local tax laws, and time savings for businesses, allowing them to focus on their core operations while ensuring their employees are paid accurately and on time.