On: I spent two years launching tiny projects

[jhassell]

As a side hustler, even with pass-through taxation, you will still have to pay the self-employment tax (15.3% of net earnings) on top of taxes at your federal and state tax bracket. However, side-hustle money spent on qualified business expenses, is not taxable. (Tax people please chime in.)

[zrail → jhassell]

Also, Social Security tax has a cap. If your day job + side project net income exceeds the cap, the excess will only incur Medicare tax.