1. The chart is meaningless without current information on the deductions and exemptions of each nation calculated into the rate; thus factoring the percentage of corporate income not taxable.
2. Gross iincome does not equal taxable income; along with declining popularity, and poor management, 'BK' (that is an example of a bad decision, KFC brings the product to mind, BK does not) faces increased competition. Most chains now let you "have it your way". BK has not come up with any recent "grab the attention" features. McDonald's has playgrounds, Hardees (Carl Jr's in the western US) has "real" milkskakes, seasoned fries and an attempt at BBQ; Wendy's is hawking faux gormet items.
3. The move has as much to do with markets as taxes; neither Hardees nor Krystal are competing in Canada. BK should be able to get a chunk of the market and the coffee/doughnut angle may sell in the US.
4. McDonalds has Ronald, Wendys has Wendy, Krystal has the tiny square burger, Hardees the smilng star............................what does BK have? "Have it your way" & "flame broiled" are worn out.
As pointed out earlier (but easily buried), 3G (BK's majority owner) divested the BK properties in Canada as part of its restructuring after it took over in 2010. So buying Tim Horton's, a national iconic brand known in every corner of Canada, gives them an instant "back in" in terms of financial interest.
Which is not a cheap investment considering TH has close to five thousand stores, but that's why I it doesn't make sense to put up umpteen billion dollars to buy a Canadian company just to do a relocation when, if that were the real motivation, all you'd have to do would be to drive over the bridge to Windsor and rent an office space.