Always brought up and not always as big of a deal as some want to make it. Especially if you look at overall cost of living, housing, medical costs for family members, etc. Would not be something easy to put together.
Tkachuk is a loser, he lives in a the lowest taxed province for gawd sake. And at the level of income he has, the US federal rate is 37% while being 33% in Canada. I think Alaska and Florida are the only states to have no income tax at all. So that means he will only play in Florida?
In 2022, American employees pay 7.65% of their wages into social security (6.2%) and Medicare (1.45%). Social security premiums are capped at an income level of $147,000. Medicare premiums have no cap. In Canada for 2022, employees pay 5.70% of gross employment income into CPP up to $61,400. Medicare-style benefits are included as part of the country's healthcare plan.
Deduction are harder to judge as it varies from state to state for those income taxes and in Canada, all except Quebec have the same deductions available if I recall. The biggest one in the US is the ability to deduct interest from a mortgage which is weird to me but how many players buy vs rent etc.