The Social Security Administration (SSA) announced that the maximum earnings subject to the Social Security component of the FICA tax will increase from $127,200 to $128,700 for 2018. This means that for 2018, the maximum Social Security tax that employers and employees will each pay is $7,979.40 ($128,700 x 6.2%). A self-employed person with at least $128,700 in net self-employment earnings will pay $15,958.80 ($128,700 x 12.40%) for the Social Security part of the self-employment tax. The Medicare component remains 1.45% of all earnings, and individuals with earned income of more than $200,000 ($250,000 for married couples filing jointly, $125,000 for married filing separately) will pay an additional 0.9% in Medicare taxes.