The US has a progressive tax system, meaning you pay higher federal income tax rates with a higher taxable incomes pay. You can calculate your taxable income by taking your gross income and subtracting your tax deductions. Your gross income is all the money you earned during the year (including your job, side hustles, and income from other sources) before any taxes or deductions are taken out. After subtracting applicable deductions, you’ll have your net income—the taxable income you’ll pay taxes for. Next, you’ll need to find your appropriate tax bracket based on your income and filing status to find what you owe. Consider using a tax liability calculator to figure out how much tax you may have to pay.