It should be at a min 22% on a separate commission check ... if your tax rate is higher then the employer should be using that higher rate if this is added to the same paycheck as the reg wages. If they give you a separate commission check then you can request they withhold more OR adjust your normal withholding so they withhold more from the reg pay to compensate for the underwithholding on the commissions. It is a tricky balancing act ... discuss this with the payroll dept.
