Let us introduce you to the
Schedule SE tax form. This is the form you will be using to calculate your self-employment tax. Every taxpayer needs to pay 15.3% in Social Security and Medicare taxes (12.4% for Social Security, and 2.9% for Medicare), and if you're a regular full-time employee, half of that is paid by your employer.
Since the IRS considers self-employed individuals to be both the employer and employee, they pay the full 15.3%. But, they can deduct half of that amount from their taxable income and pay less in taxes.
Your
self-employment taxes is based on your earnings in a tax year, which the entities that pay you will report to the IRS on the relevant tax form. You will receive a
1099-NEC from each entity that paid you for work you did (usually by the end of January).
If you received any payment through a third party payment platform, you would receive a
1099-K. You'll get a
1099-MISC if you received any miscellaneous payments. Adding up all the amounts from these forms gives you your gross income for that year.
To calculate your net income, all you have to do is total your business expenses for that year and subtract them from your gross income. If you made $20,000 in gross income, and had $5,000 in business expenses, your net taxable income will be $15,000.