Step-by-Step Breakdown of the Components
For 2026, regular employee Medicare tax is 1.45% and has no wage-base limit. The Additional Medicare Tax adds 0.9% to wages above the employer withholding threshold. Employers must begin withholding it in the pay period in which they pay an employee more than $200,000 and continue withholding through the end of the year. There is no employer match for the additional 0.9%. turn0search5■ The $200,000 employer withholding threshold is not the same thing as every taxpayer's ultimate Additional Medicare Tax liability. The final tax depends on the individual's filing status and combined applicable income. This is an important distinction if you have multiple jobs or a spouse with earnings.
For example, an employee earning $230,000 from one employer may see Additional Medicare withholding begin once wages paid by that employer exceed $200,000. The employer is following the payroll withholding rule; the employee's final tax calculation is handled on the tax return.
Taxes, Deductions, and Adjustments
This can create a confusing situation for married couples. The employer does not use the employee's filing status to decide when to start the withholding. The employer uses the $200,000 wage threshold for that employee's wages.
If you have more than one employer, each employer generally applies the withholding rule to wages it pays. The combined result can therefore differ from what you expected based on household income.
Estimating and Verifying Your Paycheck
On a pay stub, Additional Medicare Tax may appear as a separate line or be incorporated into a Medicare-related label depending on the payroll system. If you are trying to understand a new deduction, compare the year-to-date wages with the point at which the additional withholding started.
The main takeaway is that “Medicare” is not always one flat deduction for high earners. Regular Medicare continues across covered wages, while the additional 0.9% can apply once the relevant threshold is reached.
If you're estimating a high-income paycheck, make sure the calculator accounts for both regular Medicare and the Additional Medicare Tax where appropriate.