Have these details ready for each employee.
Full name (title, first name, last name)
Date of birth — DD/MM/YYYY
National Insurance number
Email address
Home address and postcode
Employment start date
Common mistakes
Wrong date format — use DD/MM/YYYY, not YYYY-MM-DD.
Invalid NI number — check the format matches HMRC records.
Typo in email — the employee won’t receive their welcome notification.