In an employer-employee situation, each party is responsible for 50% of the employee's total contributions. In a sole proprietary situation, I would think I can claim the 50% of the "employer" portion.
CRA's explanation for line 9060 wasn't very helpful. It says, "The CPP is for all workers, including the self-employed." However, there's no mention of whether I can claim the contribution as a business expense.
