What Medicare tax is withheld for maximum salary?

The Medicare tax rate is 1.45% on all earned income, with no maximum salary limit. For high-income earners, an additional 0.9% Medicare surtax applies to wages exceeding $200,000 for single filers or $250,000 for married couples filing jointly. Therefore, while there is no cap on the amount of Medicare tax withheld, higher earners may pay a total rate of 2.35% on income over those thresholds.