se the 2020 FICA Tax Rates to calculate the medicare tax for an employee with a taxable income of $52,400. 2020 FICA Tax Rates Self-employed Tax Employee rate Employer rate rate 6.2% of the 12.4% of the Social 6.2% of the first Security $137,700 of gross first $137,700 of first $137,700 of tax income gross income gross income Medicare 1.45 % 1.45% 2.9% tax 0.9% (on 0.9% (on earnings over $200,000 for Additional single filers; Medicare $250,000 for joint N/A tax filers or $125,000 for married filing separately) earnings over $200,000 for single filers; $250,000 for joint filers or $125,000 for married filing separately)