Handling payroll internally can lead to errors in calculations, tax filings, and compliance issues due to human error or lack of expertise. Managing payroll internally requires significant time and resources for tasks such as wage calculation, payment processing, and ensuring compliance. Keeping up-to-date information on tax rules, employment regulations, and compliance requirements can be challenging for internal payroll teams. This poses a risk of fines or legal issues. Internal payroll systems may struggle to adapt to changes in business needs and developments, especially for businesses with fluctuating employee numbers.