Withholding Tax: Everything You Need to Know

Withholding tax may sound like a new concept, but there’s a good chance you’ve already dealt with it: As the name implies, it's a sum of money withheld from most employees’ paychecks. The important thing is to make sure you’re having the right amount taken out.

What is withholding tax?

Withholding tax is tax your employer withholds from your paycheck and sends to the IRS on your behalf. If too much money is withheld throughout the year, you’ll receive a tax refund. If too little is withheld, you’ll probably owe money to the IRS when you file your tax return.

Tax withholding is typically made up of federal, state, local and FICA taxes.

» MORE: How state income tax rates work

Who pays withholding tax?

Most employees are subject to withholding tax. Your employer is the one responsible for sending it to the IRS. In order to be exempt from tax withholding, you must have owed no federal income tax in the prior tax year and you must not expect to owe any federal income tax this tax year.

» MORE: How much do you have to make to file taxes?

How withholding taxes are calculated

The amount of federal and state tax your employer withholds from your check largely depends on what you put on your Form W-4, which you probably filled out when you started your job.

Form W-4 asks about your marital status, dependents and other factors to help you calculate how much to withhold. The less you withhold, the less tax comes out of your paycheck.

What you put on your W-4 then gets funneled through something called withholding tables, which your employer's payroll department uses to calculate exactly how much federal and state income tax to withhold.

How to check your tax withholding

The IRS recommends checking your withholding for lots of reasons, including if you work a seasonal job, claim the child tax credit or had a large refund or tax bill last year.

To see whether you may need to change your withholding, you can use the IRS’ Tax Withholding Estimator. Before you get started, have the following information ready for yourself (and your spouse, if you’re married): your most recent pay stubs, information about other sources of income and your most recent income tax returns. You can also use our W-4 calculator to get a general sense for whether you're on track with your tax withholding.

If you need to change your withholdings, the process is fairly straightforward: Just fill out a new W-4 and submit it to your employer or human resources team. Withholding tax comes out of your paycheck throughout the year, so it’s better to make changes to your withholding sooner rather than later.

» MORE: How to adjust your W-4

Types of withholding and payroll tax

Here's a breakdown of the taxes that might come out of your paycheck. Some taxes, like your federal, state, local and FICA taxes, will be withheld from your paycheck by your employer. A few others, like FUTA and SUTA, are your employer's responsibility and not withheld.

• Federal income tax: This is income tax your employer withholds from your pay and sends to the IRS on your behalf. The amount largely depends on what you put on your W-4.

• State tax: This is state income tax withheld from your pay and sent to the state by your employer on your behalf. The amount depends on where you work, where you live and other factors, such as your W-4 (and some states don’t have an income tax).

• Local income or wage tax: Your city or county may also have an income tax. This money might go toward expenses such as the bus system or emergency services.

• Social Security tax: Frequently labeled as OASDI tax (which stands for old-age, survivors and disability insurance), this tax typically is withheld on the first $168,600 in 2024 at a rate of 6.2%. For 2025, the tax will be withheld on the first $176,100. Paying this tax is how you earn credits for Social Security benefits later.

• Medicare tax: Sometimes referred to as the “hospital insurance tax,” this pays for health insurance for people who are 65 or older, younger people with disabilities and people with certain conditions. It is a tax of 1.45% on your earnings, and employers typically have to withhold an extra 0.9% on money you earn over $200,000.

• FUTA tax: This stands for Federal Unemployment Tax Act. The tax funds a federal program that provides unemployment benefits to people who lose their jobs. Employees do not pay this tax or have it withheld from their pay. Employers pay it.

• SUTA tax: The same general idea as FUTA, but the money funds a state program. Employers pay the tax.

» MORE: See what the maximum monthly Social Security benefit is this year

Withholding tax vs. estimated tax

Unlike withholding tax, estimated taxes are not paid by an employer. Estimated tax payments are made by people who earn income that is not subject to withholding. For example, someone who is self-employed may need to estimate their tax liability and make payments quarterly.

» Are you your own boss? Learn more about estimated tax payments.

The importance of tax withholding

Remember, one of the big reasons you file a tax return is to calculate the taxes on all of your taxable income for the year and see how much of that tax you’ve already paid via withholding tax. If it turns out you’ve overpaid, you’ll probably get a tax refund. If it turns out you’ve underpaid, you’ll have a tax bill to pay.

If you ended up with a huge tax bill this year and don’t want another, you can use Form W-4 to increase your tax withholding. That’ll help you owe less (or nothing) next year.

If you got a huge tax refund, consider using Form W-4 to reduce your tax withholding. You’re giving the government a free loan and — even worse — you might be needlessly living on less of your paycheck all year. It may feel great to get a tax refund from the IRS, but think of how life might’ve been last year if you’d had that extra money when you needed it for groceries, overdue bills, getting the car fixed, paying off a credit card or investing.