Medicare Tax: The 1.45% Deduction That Never Stops

Want to see exactly how Medicare tax gets itemized? Create a pay stub that breaks out every withholding line by amount.

The One Line on Your Stub That Never Takes a Break

Look at any pay stub, from your first part-time job to your fortieth year in a corner office, and one deduction shows up every single time in the same proportion: Medicare tax. Social Security tax stops once your wages for the year cross an annual cap. Federal income tax withholding rises and falls with your filing status and allowances. Medicare tax does neither. It is 1.45% of your gross wages on the first dollar you earn and 1.45% of your gross wages on the millionth dollar, with no ceiling anywhere in between.

That flat, uncapped structure is what makes Medicare tax different from every other line on your stub, and it's why it's worth understanding on its own rather than lumping it in with the broader payroll tax conversation. If you want the full picture of how Medicare tax fits alongside Social Security under the FICA umbrella, our FICA breakdown covers both halves together. Here, we're zooming in on Medicare specifically: the rate, the cap that isn't there, the surtax that catches higher earners off guard, and what to do when the number on your stub looks wrong.

The Base Rate and Why It Has No Ceiling

Every employee pays 1.45% of gross wages toward Medicare, and every employer matches that 1.45% out of its own funds, for a combined 2.9% funding the program. Congress designed it this way in the 1960s to fund hospital insurance (Medicare Part A) for people 65 and older and for some younger people with disabilities, using a pay-as-you-go model where today's workforce funds today's beneficiaries.

Social Security's 6.2% employee rate stops once your year-to-date wages from a single employer cross the annual Social Security wage base, a figure that adjusts each year. Medicare tax has no equivalent limit. A warehouse worker earning $35,000 a year and a surgeon earning $600,000 a year both pay 1.45% on every dollar. This is a deliberate policy choice: removing the cap in 1994 broadened the funding base for a program with rising costs, and it's one of the reasons Medicare's trust fund outlook looks different from Social Security's.

Worked example: an employee paid $2,400 gross every two weeks has $34.80 withheld for Medicare each pay period (2,400 × 0.0145). Over a full year of 26 pay periods, that's $904.80 in employee Medicare tax, matched by another $904.80 from the employer. There's no point in the year where that percentage changes, unless the employee's cumulative wages from that employer cross $200,000.

The Additional Medicare Tax: Where the Flat Rate Bends

The one wrinkle in an otherwise flat structure is the Additional Medicare Tax, a 0.9% surtax that applies to wages above $200,000 in a calendar year. Employers are required to start withholding it automatically the moment an individual employee's year-to-date wages from that employer cross the $200,000 mark, regardless of the employee's actual filing status or household income. It applies whether the employee files single, married filing jointly, or any other status — the $200,000 trigger is based purely on wages from that one employer.

Worked example: an employee earning $210,000 a year sees standard 1.45% Medicare withholding on the full amount, plus an additional 0.9% on the $10,000 above the $200,000 threshold. That's $3,045 in base Medicare tax (210,000 × 0.0145) plus $90 in Additional Medicare Tax (10,000 × 0.009), for $3,135 total employee-side Medicare withholding for the year. The employer matches only the base 1.45% portion — it never matches the 0.9% surtax.

This creates a real gap for people who change jobs mid-year or hold two jobs simultaneously. Each employer calculates the $200,000 threshold independently, using only what it paid you. If you earned $140,000 at your first job and $130,000 at your second, neither employer would withhold the Additional Medicare Tax, because neither individually crossed $200,000 — but your combined wages of $270,000 would owe it. That shortfall gets reconciled when you file your tax return using Form 8959, and it can arrive as an unpleasant surprise if you weren't expecting it.

Switching employers mid-year and worried your withholding won't line up? Generate a pay stub that shows your year-to-date totals so you can sanity-check the math before tax season.

Self-Employed Workers Pay Both Halves

If you're a 1099 contractor or otherwise self-employed, there's no employer to split the bill with, so you pay both the employee and employer shares through self-employment tax: 2.9% total for Medicare (versus 1.45% for a traditional employee), plus the same 0.9% Additional Medicare Tax above the threshold, though the self-employed threshold applies to net self-employment earnings rather than wages. Our guide on building a pay stub for self-employed and 1099 work walks through how to document that income when self-employment tax isn't itemized on a traditional stub.

How to Spot It on Your Stub — and What to Do If It's Off

Most pay stubs label this deduction plainly: "Medicare," "FICA-Med," or sometimes "Med Tax." It should always equal 1.45% of gross pay for that period, unless your year-to-date wages from that employer have crossed $200,000, in which case the rate on the excess should jump to 2.35% (1.45% + 0.9%). If the percentage doesn't match either of those numbers, something is off. Common culprits include a payroll system that hasn't updated its year-to-date totals after a raise, a mid-year employer change that reset the threshold tracking, or a simple data-entry error in the payroll software.

If you spot a discrepancy, don't wait for tax season to sort it out. Flag it to your payroll or HR department right away with your pay stub in hand — the earlier a withholding error gets caught, the easier it is to correct before it compounds across multiple pay periods. Once your net pay reflects the right deductions, it's worth comparing it against your gross pay to make sure everything else lines up too; our guide to gross pay versus net pay shows exactly how each deduction should stack.

The Bottom Line

Medicare tax is simple in structure — 1.45% from you, 1.45% from your employer, no cap — until you cross $200,000 in wages from a single employer, at which point the extra 0.9% Additional Medicare Tax kicks in on your side only. Self-employed workers carry both halves themselves. Whatever your situation, the fastest way to catch an error is to check the actual percentage against your gross pay every time you're paid.

Need documentation that shows accurate Medicare and FICA withholding line by line? Build a professional pay stub in a few minutes with every deduction itemized correctly.

Frequently Asked Questions

Related Guides

• FICA Tax Explained: Social Security & Medicare Breakdown
• Glossary: Net Pay
• How to Calculate Net Pay From Gross Pay
• How to Make a Pay Stub for Self-Employed & 1099 Work

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Authoritative source: IRS — Topic 751: Social Security & Medicare Withholding Rates

This guide is informational and not legal or tax advice.