If you work for an employer, you'll want to know whether the withholdings from your pay covers your tax. If you've got more than enough withholding, then you're nearly guaranteed a refund at the end of the tax year. If you haven't got enough withholding, then you could have a tax payable. Our calculator will present you with the correct amount of withholding based on your pay. We'll also break down the amounts you'd be paid after tax, depending on your regular pay period.