Why would you withhold additional taxes?
Sarah Duran
Published Feb 24, 2026
The more allowances you claim, the less income tax is withheld from your pay. Fewer or zero allowances mean more income tax is withheld from your pay. To put it another way: More allowances equal more take-home pay and money in your pocket.
What is additional Medicare withholding?
The Additional Medicare Tax is an extra 0.9 percent tax on top of the standard tax payment for Medicare. The additional tax has been in place since 2013 as a part of the Affordable Care Act and applies to taxpayers who earn over a set income threshold.
How can I get more tax withheld?
Change Your Withholding
- Complete a new Form W-4, Employee’s Withholding Allowance Certificate, and submit it to your employer.
- Complete a new Form W-4P, Withholding Certificate for Pension or Annuity Payments, and submit it to your payer.
- Make an additional or estimated tax payment to the IRS before the end of the year.
How is additional Medicare withholding calculated?
Based on the Additional Medicare Tax law, all income for an individual above $200,000 is subject to an additional 0.9% tax. Therefore, his Additional Medicare Tax bill is $50,722 X 0.9% = $456. He has already paid (1.45% X $199,558) + (2.9% X $51,164) = $2,893.59 + $1,483.7 = $4,377.29 in Medicare taxes already.
How to find extra withholding on a paycheck?
Try to run a dummy payroll and view the paycheck details. Look into the Employee Taxes section and check the amount in the Federal Income Tax field. After that, enter the extra withholding again and create a paycheck. I’m attaching screenshots for your preference.
What is the purpose of extra withholding under the IRS?
The Extra withholding amount is added to the employee’s Federal Income Tax (FIT). There’s no additional line in the employee’s paycheck for the Extra withholding. If it’s not added to the FIT, we can perform a few troubleshooting steps to get rid of unexpected behavior.
When to use Publication 505 instead of withholding estimator?
Taxpayers with more complex situations may need to use Publication 505 instead of the Tax Withholding Estimator. This includes employees who owe, the alternative minimum tax or tax on unearned income from dependents. It can also help those who receive non-wage income such as dividends, capital gains, rents and royalties.
What do you need to know about tax withholding?
The amount withheld depends on: The amount of income earned and Three types of information an employee gives to their employer on Form W–4, Employee’s Withholding Allowance Certificate : Filing status: Either the single rate or the lower married rate.