I live in Ottawa, Ont, Canada. I and my ex wife have shared…

The law is that you must pay child support based on the Ontario table under the Federal Child Support Guidelines. But you agreed to pay 15% more and you are bound by this agreement.

The law is also that you cannot direct where any of the child support goes nor seek an accounting.

I am assuming that the amout of child support is based on a set-off of what your spouse would have to pay you. Is that correct?\

Because you pay child support you cannot claim your daughter as an equivalent to spouse nor can you get the child tax benefit or write off child care.

If the amount of childs support you pay is decreased for the set-off then you should be paying for 50% of her clothes and 50% of her other expenses as well. This makes sense based on the facts.

If your income has gone down you can seek to vary the amount of support based on your lower income.

It's not available to you because you are paying child support. And, she does not have to use it for the child. It's her money and her choice.

I have never heard of it being included in any calculation of child support.

Yes, only once can claim it, but in this case it's only the mother that can because you are paying child support. If your incomes were equal and no support was being paid you could alternate years.

And, your lawyers knew that she would claim the amount and so it wasn't forgotten in all likelihood and even if it was this doesn't mean you can deal with it now.

No.

There is no reason for you to be paying most of the extra-curricular expenses. If your income is $125K and hers is $85K then you should be paying 125/210 or 60% only. And there is no requirement that you contribute to an RESP. If you do then this will help you down the road when you can take this off your share of the contribution.

I am assuming your agreement did not touch on these issues.