Bonuses are considered excellent way to motivate employees and reward top performers; however, they can also quickly change one’s tax return and the amount of taxes initially withheld depending on the payout. IRS regards bonuses as supplemental wages, which are not regular wages. For more details, see Publication 15 (2017), (Circular E), Employer’s Tax Guide for the tax year in question. There are two ways of withholding taxes from bonus: The aggregate method: is used when