How quickly do I need to record a new employee's SIN?
Within 3 days of their start date — this is a firm requirement, and you should also confirm the SIN hasn't expired if it begins with a 9.
Do I need Workers' Compensation coverage for one employee?
In most provinces, yes — coverage requirements typically apply from your very first employee, though the specific agency and rules vary by province (WSIB in Ontario, WorkSafeBC in BC, CNESST in Quebec, etc.).
What's the difference between federal and provincial TD1?
Employees complete both — the federal TD1 covers federal tax credits, and the provincial TD1 covers provincial ones. Both affect how much tax you withhold from each paycheque.
Is this checklist different in the US?
Yes — see the US version of this checklist, which covers W-4/I-9 forms and Form 941 filing instead of TD1 and T4 requirements.