Extra Medicare tax on a high W-2 paycheck
The extra 0.9% starts above $200,000 single. $190,000 versus $250,000 in Texas, semi-monthly, from the paycheck tool.
There are two Medicare taxes on wages, and payroll mixes them into one line on a lot of stubs. The first is 1.45% of every wage dollar, with no cap. The second is an extra 0.9% on wages above a threshold: $200,000 single or head of household, $250,000 married filing jointly, in the table we use. Employers start the extra withholding when wages at that employer pass $200,000, even if you file jointly and the return threshold is higher. This calculator uses the filing status you pick, not your employer’s rule. Read it as the return, not as the stub.
Under the line
$190,000, single, Texas, 24 semi-monthly periods. Social Security is already at the wage-base cap: $11,439. Ordinary Medicare is 1.45% of $190,000, $2,755. No extra 0.9%, because $190,000 is under $200,000. Federal income tax is $34,334. Leftover $141,472. Each semi-monthly deposit is $5,894.67. The Medicare line on our page is $2,755.
Over the line
$250,000, same status and state, same 24 periods. Social Security stays $11,439. The cap already bound at $190,000. Ordinary Medicare is 1.45% of $250,000, $3,625. Extra 0.9% applies to $50,000, which is $450. Our Medicare field prints the sum, $4,075. Federal is $51,304. Leftover $183,182. Semi-monthly $7,632.58.
The raise is $60,000. Leftover rises by $41,710. The missing $18,290 is federal plus the Medicare increase of $1,320 ($4,075 minus $2,755). Social Security added nothing. That is what “I got a $60,000 raise and the check did not grow by $60,000 / 24” feels like. $60,000 / 24 would be $2,500 a period before tax. The leftover period rose by $1,737.91. The rest is tax, mostly income tax, plus that extra Medicare sliver.
Joint filers and two jobs
A joint couple does not start the extra 0.9% at $200,000 of combined wages in the statute’s threshold we model. We start joint at $250,000. Your employer may still withhold the extra once your wages at that job pass $200,000. If they withhold and you are under the joint threshold, the return reconciles it. If you have two jobs that each stay under $200,000 but together pass the threshold, neither employer may withhold the extra and you still owe it. This tool sees one annual number. It will not catch a split.
Semi-monthly is 24 deposits. The yearly Medicare dollars do not change if you switch the dropdown to biweekly. Only the envelope changes. $4,075 split by 24 is part of why the $7,632.58 deposit is not “salary divided by 24.” Federal is most of the leak. The extra 0.9% is the small, easy-to-miss piece people argue about on a stub.
Self-employment extra Medicare uses a different base, 92.35% of net earnings, on the 1099 page. Do not add this W-2 extra to a contractor plan without running that page. Investment income has its own 3.8% net investment income tax. We do not compute it. Wages are not net investment income.
Compare 190000 and 250000 on the paycheck calculator, single, Texas, 24 periods. Medicare should read $2,755 then $4,075. The IRS additional Medicare tax page is the authority if a stub disagrees. Our number is the planning math, not a payroll audit.
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