Medicare and Social Security ARE federal taxes, but they are a different kind of federal tax from your regular federal income tax. They are collected under separate payroll tax rules (often labeled “FICA” on pay stubs) and do not affect your income tax bracket calculation.

Quick Scoop

  • Social Security and Medicare are funded mainly by federal payroll taxes taken from your paycheck under FICA.
  • These FICA taxes are separate from federal income tax withholding, even though all are “federal” taxes going to the U.S. government.
  • On a pay stub, you will usually see three different lines: federal income tax, Social Security tax, and Medicare tax.

What Kind of Tax Is It?

  • Social Security and Medicare taxes are federal payroll taxes imposed by federal law and collected by the IRS.
  • They are not optional and are required for most wage and salary income, with special rules for the self‑employed who pay both the employee and employer share.

How Social Security Tax Works

  • The standard Social Security payroll tax is 6.2% of wages from the employee and 6.2% from the employer, up to an annual wage cap (for example, 168,600168{,}600168,600 in 2024).
  • Most of this revenue goes into Social Security trust funds to pay current retirement, disability, and survivors benefits.

How Medicare Tax Works

  • The basic Medicare payroll tax is 1.45% from the employee and 1.45% from the employer, with no general wage cap, plus an extra 0.9% on higher incomes.
  • These taxes mainly finance Medicare Part A (Hospital Insurance), while Parts B and D are funded by a mix of general federal revenues and beneficiary premiums.

Are They “Part of Federal Taxes”?

  • Broadly: yes, they are federal taxes because they are imposed by federal law and collected by the federal government.
  • Narrowly (for filing your 1040): no, they are not part of your federal income tax calculation or tax bracket; they are separate FICA lines with their own rates and rules.

Bottom line: Medicare and Social Security are federal payroll taxes that fund specific programs, but they are not counted as part of your federal income tax even though all three show up together on your paycheck.

Information gathered from public forums or data available on the internet and portrayed here.