You may be the proprietor of a temporary-help service firm. Temporary-help service firms are service contractors who provide their employees to clients for assignments.
The assignments may be temporary, depending on the clients' needs.
Workers of these firms are usually employees of the firms. As a result, you have to deduct CPP contributions, EI premiums, and income tax. You also have to remit these amounts and report them on a T4 slip.
If you have any doubts about whether an employer-employee relationship exists for CPP and EI purposes, you can request a ruling.