Tax on bonus vs federal tax rate

[aE]

I received a bonus which was taxed at 22% which is the standard procedure as per here. But what happens if my tax bracket is  higher- is it correct that I now owe the difference between my federal tax rate bracket and 22%? The same link above says the 22% rate applies on bonuses up to $1 million which would suggest at that bonus, only $220K would be withheld but then you'd owe $150K at tax time??

[Hal_Al]

Q. But what happens if my tax bracket is  higher- is it correct that I now owe the difference between my federal tax rate bracket and 22%? 

A.  Yes.  You were not actually "Taxed".  The 22% is only mandated "withholding", an estimate of the amount of tax due.  No piece of income is taxed individually. All your income, including bonuses, is added together at tax filing time. The tax is calculated on that total (after adjustments, deductions,  and credits). Then withholding is subtracted to determine if you owe more or get a refund.

[cbrodericks]

Very helpful.