Withholding Tax Calculator

Related Calculators

External Resources

Frequently Asked Questions

What is tax withholding?

Tax withholding is the amount your employer deducts from your paycheck to pay your federal, state, and local taxes. The amount is based on your W-4 form, income, pay frequency, and filing status. The goal is to withhold approximately the right amount so you neither owe nor get a large refund.

How is federal income tax withholding calculated?

Employers use the IRS withholding tables in Publication 15-T. The calculation considers your wages, pay frequency, filing status, number of allowances (pre-2020 W-4), or the dollar amounts you entered on your W-4 (post-2020). The two methods are the wage bracket method and the percentage method.

What is a W-4 form?

Form W-4 (Employee's Withholding Certificate) tells your employer how much federal income tax to withhold from your paycheck. The 2020 redesign replaced allowances with a 5-step process asking about multiple jobs, dependents, deductions, and extra withholding. You should submit a new W-4 when your tax situation changes.

How do I fill out a W-4 to have the right amount withheld?

On the 2024 W-4: Step 1 (personal info), Step 2 (multiple jobs - check box or use worksheet), Step 3 (claim dependents credit), Step 4a (other income like interest/dividends), Step 4b (deductions above standard), Step 4c (extra withholding). The IRS Tax Withholding Estimator can help you dial in the exact amount.

What is the difference between withholding and estimated tax?

Withholding is deducted from your paycheck by your employer. Estimated tax payments are made directly to the IRS quarterly by self-employed individuals, retirees, investors, and others whose income is not subject to withholding. Both serve the same purpose - paying taxes throughout the year.

How much tax should be withheld from my paycheck?

The right amount depends on: wages, pay frequency, filing status, dependents, other income (spouse, investments, side hustles), deductions (mortgage interest, charity), and tax credits. The goal is to have 90% of your total tax liability withheld or 100% of last year's tax (110% if AGI > $150,000).

What happens if too little tax is withheld?

If you underwithhold, you may owe taxes and potentially a penalty when you file. The penalty applies if you owe more than $1,000 after withholding and credits, and you paid less than 90% of current year tax or 100% of prior year tax (110% if AGI > $150,000). The penalty is based on the underpayment amount and duration.

What happens if too much tax is withheld?

If you overwithhold, you will receive a tax refund when you file. While getting a refund means you didn't make an interest-free loan to the government, large refunds indicate you could adjust your W-4 to have more money in each paycheck. The average refund in 2023 was about $3,100.

How do I adjust my withholding?

Submit a new W-4 to your employer anytime your tax situation changes. You can adjust: Step 2 for multiple jobs, Step 3 for dependents, Step 4a for other income, Step 4b for additional deductions, Step 4c for extra withholding per pay period. Use the IRS Tax Withholding Estimator online for accuracy.

What is the IRS Tax Withholding Estimator?

The IRS Tax Withholding Estimator is a free online tool at IRS.gov that helps you determine the correct amount of tax to withhold from your paycheck. It considers your income, deductions, credits, and compares estimated withholding to your expected tax liability.

How does state withholding work?

Most states with income tax require employers to withhold state income tax. Each state has its own withholding form (similar to W-4) and tables. Some states use a percentage of federal withholding, others have their own formulas. A few states (AK, FL, NV, SD, TN, TX, WA, WY) have no state income tax withholding.

Do I need to withhold if I am self-employed?

Self-employed individuals do not have withholding. You must make quarterly estimated tax payments using Form 1040-ES. Payments are due April 15, June 15, September 15, and January 15 of the next year. The IRS expects you to pay at least 90% of current year tax or 100% of prior year tax.

How do bonuses affect withholding?

Employers can use the flat rate method (22% federal for bonuses under $1M, 37% over $1M) or the aggregate method (combining with regular wages). The flat rate may result in different withholding than your marginal rate. You can request additional withholding on your W-4 if needed.

What is the percentage method for withholding?

The percentage method is one of two IRS-approved methods for calculating withholding (the other is wage bracket). It applies a formula: annualize wages, subtract the allowance amount, compute tax on annual wages using tax tables, divide by pay periods. More precise than wage bracket but more complex.

How does marriage affect withholding?

Marriage changes your filing status and tax brackets. Both spouses should complete Step 2 of the W-4. Options: check the box for two jobs (withholds at higher single rate), use the Multiple Jobs Worksheet, or use the IRS Estimator. Combining incomes can push you into higher brackets or cause marriage penalty/bonus.

What withholding should I choose for a second job?

On your W-4 for the second job: check the box in Step 2 (this instructs each employer to withhold at the higher single rate) or use the Multiple Jobs Worksheet. Alternatively, have one employer withhold at the married rate and the other at single rate. The goal is to cover the combined tax on both incomes.

How do dependents affect withholding?

On Step 3 of the W-4, you can claim the Child Tax Credit ($2,000 per qualifying child under 17) and the Credit for Other Dependents ($500 each). Entering these reduces your withholding. The credit is multiplied by the number of qualifying children and entered as an annual credit amount.

How does the standard deduction affect withholding?

The standard deduction is built into the withholding tables and W-4 calculations. For 2024: $14,600 (single), $29,200 (MFJ), $21,900 (head of household). If you plan to itemize deductions exceeding these amounts, enter the expected excess on Step 4b of your W-4 to reduce withholding.

What is backup withholding?

Backup withholding (24%) applies when a payee fails to provide a correct TIN (SSN/EIN) or the IRS notifies the payer that the payee underreported interest/dividends. The payer must withhold 24% of reportable payments (interest, dividends, rents, royalties, etc.) and remit to the IRS.

How do stock options affect withholding?

When NSOs are exercised, the bargain element is treated as wages subject to withholding. Employers must withhold 22% federal (supplemental rate) plus applicable taxes. ISOs may trigger AMT but not regular withholding at exercise. RSUs are subject to withholding at vesting, often by withholding shares.

How do retirement distributions affect withholding?

Retirement account distributions (401(k), IRA, pension) are subject to mandatory withholding of 10% for periodic payments unless you elect otherwise. Lump-sum eligible rollover distributions have mandatory 20% federal withholding. You can elect no withholding on IRA distributions but not on eligible rollover distributions.

What is the safe harbor for withholding?

The safe harbor rule says you won't owe a penalty if your withholding and credits equal at least: 90% of current year tax, or 100% of prior year tax (110% if AGI > $150,000). These thresholds ensure you avoid underpayment penalties even if you end up owing more when filing.

How do I check if my withholding is correct?

Use the IRS Tax Withholding Estimator online, or compare your total withholding (from W-2 Box 2) to your expected tax liability. If you got a large refund (>$1,500) or owed a lot (>$1,000) last year, adjust your W-4. Check your pay stubs to verify the changes took effect.

What is the withholding on Social Security benefits?

You can request voluntary withholding from Social Security benefits by submitting Form W-4V to the SSA. You can choose 7%, 10%, 12%, or 22%. This helps avoid estimated tax payments if you expect to owe tax on your benefits.

How does withholding work for nonresident aliens?

Nonresident aliens use Form W-4 (or Form 8233 for treaty exemptions). Withholding rates differ: wages are subject to graduated withholding, scholarships and fellowships may be exempt, and certain payments are subject to 30% flat withholding. Special rules apply for students and business trainees.

What is the difference between withholding and FICA?

Withholding refers to federal and state income tax deducted from pay. FICA is the combination of Social Security tax (6.2%) and Medicare tax (1.45%). Both are deducted from paychecks but go to different purposes: income tax funds general government, FICA funds Social Security and Medicare.

Do I have to withhold from tips?

Yes, tips are subject to income tax withholding and FICA taxes. Employees must report tips to their employer monthly (Form 4070). Employers withhold taxes based on reported tips. If total tips plus wages exceed $200,000, Additional Medicare Tax withholding also applies.

What happens if my employer doesn't withhold enough?

You are ultimately responsible for paying the correct tax. If your employer underwithholds, you must make estimated tax payments or increase withholding from other sources. The employer may face penalties for failing to withhold correctly, but you still owe the tax.

How does withholding work with multiple employers?

Each employer withholds based on your W-4 for that job. Neither knows about the other job. To avoid underwithholding, check the box in Step 2 of each W-4, use the Multiple Jobs Worksheet, or request extra withholding on Step 4c. Your total withholding should equal the tax on combined income.

What is the withholding allowance (pre-2020)?

Before 2020, W-4 used allowances to determine withholding. Each allowance reduced withholding by a specific amount. The system was replaced because it was confusing and caused inaccurate withholding. Pre-2020 W-4s remain valid unless you need to update them.

Do I need to withhold if I have a side hustle?

Side hustle income is not subject to withholding unless you are an employee. You should make estimated tax payments quarterly on your self-employment income. Alternatively, increase withholding from your regular job W-4 to cover the additional tax from your side business.