In-depth explanations of federal taxes, Medicare, and Social Security.
This guide is part of our Tax Forms service — W-4, W-9, 1099-NEC and other IRS-aligned forms.
Explore Tax Forms
Master the W-4 form with our comprehensive, step-by-step instructions. Ensure accurate tax withholding and compliance. Generate your W-4 form easily.
How federal income tax withholding actually gets calculated from your W-4, why it isn't a flat percentage, and how to fix it if it's off.
How payroll taxes work: what's withheld from your paycheck, what your employer matches, and where each dollar actually goes.
Medicare and Social Security explained side by side: rates, wage caps, the Additional Medicare Tax, and how self-employment tax changes the math.
Where FICA appears on your pay stub, how to verify the arithmetic against your gross pay, and the correction process when it's withheld wrong.
What FICA tax is and how much comes out of your paycheck: the Social Security and Medicare breakdown, the rates, and what it funds.
An in-depth, authoritative guide explaining state payroll taxes explained to ensure you meet all compliance and financial reporting requirements.
