A sole proprietor who has employees has to calculate his profit after paying wages. If you pay wages, you have to pay 1/2 of FICA. After you calculate your profit, you then have to fill out Schedule SE and calculate the 15.3% tax. I know you are saying that it is two separate things, but where is that distinction drawn on a tax return which supposes that you pay wages AND make a profit? I don't see anywhere that states if you paid wages DO NOT proceed to Schedule SE.
That is because any self employed person who pays wages, and has a profit left over at the end, DOES need to proceed to schedule SE.
Let me try to explain things more clearly. 15.3% of earnings have to be paid for every single person that has an
earned income. The question isn't whether or not it has to be paid, but WHO has to pay it. An employee pays 1/2 of it, and their employer pays the other half. A self employed person pays all of it.
Joe is self employed. Joe has self employment gross income of 100k. Joe has employees and uses a payroll service to handle payroll and properly withholds all taxes, and to pay all employer taxes (which includes the employer's share of social security and medicare taxes). After all expenses (including
all payroll expenses) Joe has a proft of 25k. That is Joes "earned income". Joe must pay SE taxes on that 25k of earned income.
Now, if instead of being self employed, Joe is organized as an S-corporation and pays himself a regular and reasonable salary with regular withholding, along with the rest of his employees. After all expenses, including Joe's salary, Joe has a profit of 5k. That 5k of profit passes through to his personal return as schedule E income and is NOT subject to SE tax. However the key there is that Joe pays himself a regular and reasonable salary, and the 15.3% does get paid on that regular and reasonable salary.