Body The Tax Cuts and Jobs Act changed the way tax is calculated. The IRS encourages everyone to perform a “paycheck checkup” to see if you have the right amount of tax withheld for your personal situation. For employees, withholding is the amount of federal income tax withheld from your paycheck. The amount of income tax your employer withholds from your regular pay depends on two things: The amount you earn. The information you give your employer on Form W–4. For help with your withholding, you may use the Tax Withholding Estimator. You can use the Tax Withholding Estimator to estimate your 2020 income tax. The Tax Withholding Estimator compares that estimate to your current tax withholding and can help you decide if you need to change your withholding with your employer. More details about the Tax Withholding Estimator and the new 2020 withholding tables can be found on the Frequently Asked Question pages: Tax Withholding Estimator FAQs FAQs on the 2020 Form W-4 Tax Withholding Estimator Individuals If you are an employee, your employer probably withholds income tax from your pay. Tax may also be withheld from certain other income — including pensions, bonuses, commissions, and gambling winnings. Tax withholding estimator Estimated taxes PDF View More Employers Employers are required by law to withhold employment taxes from their employees. Employment taxes include federal income tax withholding and Social Security and Medicare Taxes. Withholding tables PDF Publication 15 PDF Calculate Your Employment Taxes Foreign Persons Most types of U.S. source income received by a foreign person are subject to U.S. tax of 30 percent. The tax is generally withheld (Non-Resident Alien withholding) from the payment made to the foreign person. NRA Withholding Publication 525 PDF