Yes — any money you earn from a side hustle, freelance work, gig platforms like Uber or Etsy, or any other self-employment activity is taxable income that must be reported on your federal tax return. Unlike a W-2 job where your employer withholds taxes automatically, side hustle income has no withholding — so you're responsible for paying both income tax and self-employment tax (15.3% on net earnings up to the Social Security wage base) on your own, typically through quarterly estimated tax payments. You'll report side hustle income and deductible business expenses on Schedule C, and the resulting net profit flows to your Form 1040. You may receive a Form 1099-NEC from clients who paid you $600 or more during the year, but you're required to report all self-employment income even if you don't receive a 1099. The silver lining is that legitimate business expenses — supplies, software, a home office, business mileage, and more — reduce your taxable profit and can significantly lower your tax bill.