Almost every agent is an independent contractor. Your brokerage issues a 1099, not a W-2, and it withholds nothing — no federal, no Idaho, no Social Security, no Medicare.
That last part is where new agents get hurt. As an employee, you and your employer split Social Security and Medicare. As a self-employed agent, you pay both halves — roughly 15.3% of your net self-employment earnings — on top of ordinary income tax.
An agent who nets $80,000 and mentally budgeted for "the tax bracket" is often short by five figures. The commission felt like salary. It was not.