share expenses for post secondary education for my daughter

You have posed two questions. First, the gross revenue of self-employed persons, less their legitimate expenses, determines their support obligations. What they pay themselves is only one consideration.

In terms of the section 7 special and extraordinary expenses, as a general concept if a child continues to reside primarily with the primary parent then table child support is still owing despite the fact that the child is now in a post-secondary institution. Of course, there are exceptions to this comment and, accordingly, if you wish more specific guidance that is applicable to your case then you are welcome to contact me at 866-557-3222 for a free consultation.

(The information provided above is general, not legal advice, as circumstances vary from case to case. As well, generally speaking, the above information relates to Ontario law. Thus, if you wish legal advice that you can rely upon for your specific case, or if you are making inquiries where Ontario law may not apply, please contact Andrew Kania for a free consultation).