Currently the Medicare tax rate is a flat 2.9% on all wage income, with both the employer and the employee paying exactly one-half of this amount. Starting in 2013, the flat 2.9% Medicare tax will continue to apply to wages under $200,000 (or under $250,000 for married couples filing a joint return). There will be an additional 0.9% Medicare tax on wages over $200,000 ($250,000 for joint filers). This additional tax is to be withheld from wages, or if not withheld, it is to be paid directly by the employee. This additional Medicare tax also effects self-employed persons paying the self-employment tax.