What is the FICA tax?

FICA (Federal Insurance Contributions Act) tax funds Social Security and Medicare through a combined 15.3% tax on W-2 wages - 12.4% for Social Security (on wages up to $168,600 for 2026) and 2.9% for Medicare (uncapped). Employers pay half (7.65%) and withhold the other half from employee paychecks. S Corporations shareholder-employees pay FICA only on their reasonable salary, not on distributions, which is the primary mechanism for reducing employment taxes through the S Corp structure.

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