US / Canada tax treaty eliminates double taxation. Revenue Canada’s definition of Canadian residence is 6-months + 1-day (183-days).
Surpass 183 days on CDN soil during the calendar year, obliged to pay full CDN taxes - for athletes only pay CDN taxes for the amount of time spent on Cdn soil.
1-day is defined as a full 24-hr period in Canada, US allows room for maneuverability. With US travel schedule for players during a season + off season time spent outside of Canada allows for IRS time building.
Zero state tax locales like Fla (where Huberdeau & PLD call home) do not tax any income (incl bonus, retirement etc.)
IRS does not view bonus as income whereas Revenue Canada does
Auston Matthews present contract:
Year 1: $15.2 million signing bonus, $700,000 salary
Year 2: $15.2 million signing bonus, $700,000 salary
Year 3: $9.7 million signing bonus, $750,000 salary
Year 4: $7.2 million signing bonus, $750,000 salary
Year 5: $7.2 million signing bonus, $750,000 salary
Matthews’ does not get taxed on all his signing bonus money, only his salary for CDN tax purposes.
Since his offseason US residence is Az, who don’t tax bonus he pays the IRS a flat tax