You earned $75,000 this year. But how much of that will the IRS actually take? The answer depends on dozens of variables: your filing status, dependents, deductions, credits, state taxes, retirement contributions, and investment income. Calculating this by hand using IRS tax tables is tedious and error-prone. You could wait until April and file your return to find out. But by then, it's too late to adjust your withholding or prepare for a tax bill. Or you could make estimated tax payments throughout the year—but how much should you pay? Or you could use an income tax calculator to instantly show that your $75,000 salary, after the standard deduction, results in approximately $8,500-$10,000 in federal income tax—and whether you're on track to owe or receive a refund. An income tax calculator estimates your federal income tax liability by applying IRS tax brackets, deductions, and credits to your income. It shows your effective tax rate, calculates estimated taxes, and helps you ...