part time real estate agent tax - are they double taxed?

[Henry Li]

so... both my wife and I have a W2 job. let's say our income is at around the 24% tax bracket. And then my real estate sales "part time"  let's say I made 50k in 2019. Does it mean the 50k commission income has to be taxed our ordinary income tax rate 24%, plus the self employed tax which is about another 15%? If so then that it would be about 40% tax that we have to pay? Sounds a bit too much and would like to get some clarification. thank you in advance.