Medicare Tax Calculator
Tax & Income1.45% Medicare plus the 0.9% surtax.
Your details
Enter your Medicare wages to begin.
Advanced options
Enter your Medicare wages to begin.
Your inputs
| Input | What it means | Your value |
|---|---|---|
| Employment type | Whose Medicare tax this estimates | Employee |
| Tax year | Sets the (currently identical) rates and thresholds | 2026 |
| Filing status | Sets the year-end surtax threshold | Single |
| Annual Medicare wages | Medicare wages the 1.45% applies to | $0 |
Know what this estimate is based on
- Jurisdiction
- United States unless the calculator explicitly says otherwise
- Rules and time period
- Tax years supported by the selected calculator
- Scope and limitations
- Educational estimate only, not a tax return or filing determination. U.S. statutory-threshold tools use USD. Confirm current law and your facts with the relevant authority or a qualified tax professional.
- Source links checked
- Jul 30, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
How to use
- 01
Pick whether you are looking at Medicare tax as an employee, as the employer paying the match, or as a self-employed filer who carries both halves, then choose the tax year and your filing status.
- 02
Enter your annual Medicare wages — the figure in Box 5 of a W-2 — or, if you work for yourself, your net profit after expenses. Medicare has no wage ceiling, so the rate touches every dollar.
- 03
Open Advanced options to add year-to-date wages and the current paycheck for a per-paycheck withholding view, or other Medicare wages that eat into the surtax threshold first.
- 04
Read the headline tax, the split between the base rate and the 0.9% surtax, the employer match or deductible half, your effective rate, and how the bill climbs across income levels.
Formula
Regular Medicare tax = Medicare wages × 1.45% for an employee, matched dollar-for-dollar by the employer, so 2.9% reaches Medicare in all. A self-employed filer instead multiplies net profit by 92.35% to get net earnings, then applies the whole 2.9% directly — and deducts half of that 2.9% portion as an above-the-line adjustment. Additional Medicare Tax = 0.9% × the part of your Medicare wages (or net self-employment earnings) that rises past your threshold. Single filers and heads of household cross that line at $200,000; a married couple filing jointly shares one line at $250,000; and spouses who file separately each reach it at $125,000. The employer never matches this surtax — only the worker owes it. Withholding works on a different trigger than the year-end bill. An employer must start withholding the 0.9% as soon as a single employer has paid you over $200,000 within the year — a flat figure that ignores filing status. The amount you truly owe uses your filing-status threshold, so the two rarely match. Form 8959 reconciles the gap on your return: it credits surtax already withheld and charges whatever is still due. Effective Medicare rate = total Medicare tax ÷ the wages or profit you started with.
Example
Take a single employee earning $250,000 of Medicare wages in 2026. The regular Medicare tax is $250,000 × 1.45% = $3,625. Because $50,000 of those wages sit above the $200,000 single threshold, the 0.9% surtax adds $50,000 × 0.9% = $450, for a year-end Medicare bill of $4,075 — an effective rate of about 1.63%. The employer pays its own $3,625 match but none of the surtax, so $7,700 reaches the Medicare program in total. Now switch the same person to self-employment with $150,000 of net profit. Multiplying by 92.35% gives $138,525 of net earnings, and the full 2.9% rate produces $4,017.23 of Medicare tax. Nothing is over $200,000, so there is no surtax, and half of the bill — $2,008.61 — comes back as an income-tax deduction. The effective rate against the $150,000 profit is roughly 2.68%.
Definitions
- Medicare tax (Hospital Insurance)
- The payroll tax that funds Medicare Part A. Employees and employers each pay 1.45% of wages; a self-employed person pays the combined 2.9%. It is separate from the income tax and from Social Security.
- Medicare wages (Box 5)
- The pay the Medicare rate applies to, shown in Box 5 of a W-2. It has no annual ceiling and can differ from taxable wages — 401(k) deferrals are still counted, while pre-tax health premiums usually are not.
- Additional Medicare Tax
- An extra 0.9% the worker alone pays on Medicare wages or self-employment earnings that rise above the worker's own filing-status threshold. It is reported on Form 8959 and never matched by an employer.
- Filing-status threshold
- The earnings level where the 0.9% surtax begins for the year: $200,000 for a single or head-of-household filer, $250,000 on a joint return, and $125,000 when married filing separately. These figures are fixed in law and never indexed to inflation.
- Employer withholding trigger
- The flat $200,000 of year-to-date pay at which an employer must begin withholding the 0.9% surtax, regardless of how you file. It is a withholding rule, not your actual liability.
- Form 8959
- The IRS form that settles the Additional Medicare Tax on your return — comparing what an employer withheld against what your filing status truly owes, and refunding or billing the difference.
- Net self-employment earnings
- Net business profit multiplied by 92.35%. The 7.65% trim offsets the employer share of payroll tax that a salaried employee's paycheck quietly avoids, and the Medicare rate then applies to the reduced figure.
- Deductible half
- For the self-employed, one half of the 2.9% Medicare portion (and the Social Security portion) is an above-the-line deduction that lowers income tax. The 0.9% surtax is never deductible.
- Wage cap
- A ceiling above which a payroll tax stops applying. Social Security has one; Medicare does not, which is why high earners keep paying — and eventually the surtax — on every additional dollar.
- Effective Medicare rate
- Total Medicare tax divided by the wages or profit you began with. It sits at 1.45% for an employee until the surtax pushes it higher, and near 2.68% for the self-employed once the 92.35% factor is folded in.
Good to know
What the Medicare tax pays for
Every paycheck quietly carries a slice marked for Medicare. That slice is the Hospital Insurance tax, and it flows into the trust fund behind Medicare Part A — the hospital coverage most Americans lean on from age 65. The arrangement is generational rather than personal: the tax you pay today helps cover today's retirees, and a future generation will cover you. Unlike a savings account, nothing is set aside in your name; the dollars are spent almost as fast as they arrive. The tax sits inside the broader payroll-tax system but stands apart from income tax. Your income-tax bill depends on deductions, credits, brackets and dependents. The Medicare tax ignores all of that — it is a flat percentage of what you earn from work, settled before most other math even begins. Two people with wildly different deductions but the same wages owe exactly the same Medicare tax. That simplicity is deliberate. Because the funding has to be steady and predictable, lawmakers kept the design plain: one rate, applied to one broad base, collected automatically. The only real wrinkles are the absence of a wage ceiling and a small surtax on high earners, both covered in the sections that follow. Understanding those two features is enough to explain almost any Medicare figure on a pay stub or tax return — and to know whether the amount withheld is too much, too little, or exactly right.
The 1.45% rate and why there is no ceiling
For a wage earner the headline number is small: 1.45 cents of Medicare tax on every dollar of pay. There is no exemption at the bottom and, crucially, no cutoff at the top. This is the single feature that surprises people most, because its sister tax behaves the opposite way. Social Security stops once your wages reach an annual cap; Medicare never stops. That difference compounds at higher salaries. A worker earning $60,000 pays $870 in Medicare tax. Double the salary to $120,000 and the tax doubles to $1,740 — the rate stays flat, so the dollars scale in lockstep. Keep climbing to $400,000 and the base Medicare tax is $5,800, still rising one-for-one with pay. Nothing flattens out, which is why Medicare quietly becomes the larger payroll tax for very high earners even though its rate is far below Social Security's. The lack of a ceiling was a policy choice made when Congress removed the Medicare wage cap in the early 1990s. The reasoning was that hospital costs grow with the whole economy, so the funding base should grow with the whole paycheck rather than freezing at a fixed point. For most workers the practical effect is reassuring in its dullness: there is no threshold to track, no point in the year where Medicare withholding suddenly stops, and no cap-related true-up to worry about. The amount simply tracks earnings, payday after payday, all year long.
The employer match and who really pays
On a W-2 you see only your 1.45%, but an equal 1.45% leaves the employer's pocket alongside it. Together they send 2.9% of your wages to Medicare. The calculator's employer view isolates that second 1.45% so a business owner can budget the cost of a hire, and so an employee can see the full amount their work generates for the program. Economists have long argued about who truly bears the employer half. On paper the company writes the check, but studies suggest much of that cost is ultimately absorbed by workers in the form of slightly lower wages than they would otherwise receive. You will not see it on a pay stub, yet it shapes the total compensation an employer can afford. This is why the combined 2.9% figure is worth knowing even if only half appears as a deduction: it is the real price of the Medicare promise on your earnings. The match has one firm limit, and it is the surtax. When a high earner owes the extra 0.9%, the employer does not match that piece — it is the employee's burden alone. So at very high salaries the two sides stop being mirror images: the worker pays 1.45% plus 0.9% on the top slice of pay, while the employer keeps paying a clean 1.45% on everything. The calculator reflects this by dropping the surtax line entirely from the employer view, leaving only the matched base rate.
Medicare tax when you work for yourself
Running your own business changes the arithmetic, because you are employer and employee in one person. There is no second party to match your contribution, so you shoulder the entire 2.9% Medicare rate yourself. Two adjustments keep this from being punishing. The first is the 92.35% factor. Before any rate applies, you multiply your net profit by 0.9235. That trim — exactly 7.65% off the top — exists so a self-employed person is not taxed on money a salaried worker never would have been; it stands in for the employer-side payroll tax an employee's wages quietly escape. Only after that haircut does the 2.9% Medicare rate land on what remains, which the calculator labels your net self-employment earnings. The second adjustment arrives at tax time. Half of your combined self-employment tax — the half that mirrors what an employer would have paid — is an above-the-line deduction. For the Medicare portion specifically, that means the equivalent of the 1.45% employer share comes back to reduce your income tax. The calculator surfaces this as the deductible half so you can see the true after-deduction cost rather than the gross figure. One boundary catches new freelancers off guard: if net earnings after the 92.35% factor fall below $400, no self-employment tax is due at all for the year. And a loss is just a loss — it produces no Medicare tax and cannot be used to wipe out the Medicare tax on a separate job's wages. The tool flags both situations so a slow year or a side venture in the red is handled correctly.
The 0.9% Additional Medicare Tax
Layered on top of the flat rate is a surtax aimed squarely at high earners. Enacted as part of the 2010 health-care law, the Additional Medicare Tax adds 0.9% to the part of your earnings that climbs above a set line. Below the line you pay nothing extra; above it, every dollar carries the surcharge. Where the line sits depends on how you file. A single filer or head of household crosses it at $200,000. A married couple filing jointly shares one line at $250,000, while spouses who file separately each face a low $125,000. Picture a single employee earning $250,000: the first $200,000 escapes the surtax, the final $50,000 carries it, and the extra bill is $50,000 times 0.9%, or $450 — on top of the usual 1.45%. Two details make the surtax distinctive. First, it falls on the worker alone; there is no employer match, which is why a business never pays more because an employee is wealthy. Second, the thresholds are frozen. They were written into law over a decade ago and, unlike tax brackets or the Social Security wage base, they are not adjusted for inflation. As wages drift upward over time, more people quietly cross into surtax territory each year without any law changing — a slow, automatic broadening of who pays. The calculator shows exactly how much of your income sits above the line and what the 0.9% adds, so the surcharge is never a surprise on your return.
Withholding versus what you actually owe
Here is the wrinkle that trips up the most people, and the reason a dedicated Medicare tool earns its keep: the amount withheld for the surtax during the year and the amount you genuinely owe are calculated on different rules, and they often disagree. An employer follows a simple, status-blind instruction. The instant your earnings with a given employer top $200,000 for the year, it must begin withholding the extra 0.9% — and it keeps doing so on the rest of your pay. It does not know or care whether you are married, single, or holding a second job. Your actual liability, by contrast, is figured on your tax return using your filing-status threshold and all of your household's Medicare earnings combined. Those two yardsticks rarely line up. A married couple filing jointly with one $230,000 earner will have had no surtax withheld — the single paycheck never reached $200,000 — yet may owe none either, since they sit under the $250,000 joint line. Flip it around: a single filer with two $150,000 jobs has $300,000 of wages and owes surtax on $100,000, but neither employer withheld a cent because no single job crossed $200,000. And a high single earner can have surtax withheld that exactly matches the bill. Form 8959 is where it all settles. The form tallies what was actually withheld, compares it to what your status truly owes, and either credits the excess toward your refund or adds the shortfall to your balance due. The calculator deliberately shows the per-paycheck view and the annual liability as two separate panels precisely because they answer two different questions — and the distance between those two answers is the entire point.
What counts as Medicare wages
The rate is simple; the base it applies to has a few quirks worth knowing. Medicare wages live in Box 5 of your W-2, and that figure is not always the same as the pay in Box 1 that drives income tax. The differences come from how various pre-tax items interact with payroll taxes. The biggest surprise is retirement savings. Money you defer into a traditional 401(k), 403(b) or similar plan lowers your income-tax wages but not your Medicare wages. The Medicare tax is charged on your pay before that deferral comes out, so a generous saver still pays full Medicare tax on every dollar contributed. This is one of the main reasons Box 5 often exceeds Box 1. Some pre-tax items work the other way and do shrink the Medicare base. Premiums you pay for employer health, dental or vision coverage through a cafeteria (Section 125) plan, contributions to a flexible spending account, and payroll-deducted contributions to a health savings account generally come out before Medicare tax applies. Those reductions pull Box 5 down below your gross pay. Most other forms of compensation are firmly inside the base. Tips you report, cash bonuses, commissions, and the taxable value of many fringe benefits all count as Medicare wages. Because there is no ceiling, none of this stops mattering at higher income — every reported tip and every bonus carries the 1.45%, and once you pass the threshold, the 0.9% as well. When you enter wages in the calculator, the Box 5 figure is the one to use for the most accurate result.
Couples, second jobs, and combined thresholds
Medicare tax is straightforward for someone with one job and one income, and turns interesting the moment a household gains more moving parts. The complications all trace back to one fact: employers withhold based on a single job's pay, but the surtax is owed on your combined picture. Consider a married couple who each earn $180,000. No individual paycheck reaches the $200,000 withholding trigger, so neither employer withholds any surtax. But their combined $360,000 sits well above the $250,000 joint threshold, leaving $110,000 exposed to the 0.9%. The roughly $990 of surtax goes entirely unwithheld during the year and lands as a balance due on Form 8959. Couples in this position often benefit from extra withholding or a quarterly payment to avoid a springtime surprise. A single person juggling two jobs faces the same blind spot. Each employer sees only its own salary against the $200,000 line, so two $130,000 jobs trigger no surtax withholding even though $60,000 of the combined $260,000 is surtaxable. Mixing a salaried job with self-employment adds another layer: the W-2 wages consume the threshold first, so only the self-employment earnings past that leftover amount take the 0.9%. The calculator's other-Medicare-wages field is built for exactly these cases. Enter a spouse's earnings or a second job there, and the tool reduces the threshold the way Form 8959 does, revealing the combined surtax that no single employer would ever withhold. Seeing that number ahead of time turns a nasty April surprise into a planned-for line item.
Medicare the tax versus Medicare the coverage
One of the most common mix-ups has nothing to do with arithmetic. People assume the Medicare tax on their paycheck is the same as the Medicare bills a retiree pays. They are entirely different stages of the same program, and confusing them leads to bad planning. The tax covered by this tool is what you pay into the system while you work. It buys you something specific: enough quarters of contributions to qualify for premium-free Part A hospital coverage later. Most people who pay the tax for about ten years owe nothing for Part A when they enroll. That is the deal the 1.45% funds. The premiums a retiree pays are a separate matter. Part B, which covers doctors and outpatient care, carries a monthly premium, and Part D drug coverage carries another. Higher-income retirees pay an income-related surcharge called IRMAA on top of those premiums, calculated from a tax return two years earlier. None of that is the payroll tax, and none of it is what this calculator estimates. The practical lesson is to keep the two phases mentally separate. Paying more Medicare tax now does not raise your future premiums, and it does not buy richer benefits — Part A coverage is the same whether you paid the tax on a $50,000 salary or a $500,000 one. This is strictly a tool for the working-years tax, not a guide to enrollment, premiums, or benefit eligibility. For those decisions, speak with the Social Security Administration or a licensed Medicare advisor.
Planning around the Medicare tax
Because the base rate is flat and uncapped, there is little a typical employee can do to dodge the 1.45% — and that is fine, since it is modest. The planning opportunities cluster around the 0.9% surtax and around the self-employed, where the numbers grow large enough to reward attention. For high earners brushing against the threshold, timing can help at the margins. Deferring a bonus into a year when total earnings will be lower, or spreading the recognition of variable pay across two years, can keep some income below the surtax line. Remember, though, that traditional retirement contributions do not lower Medicare wages, so maxing a 401(k) trims income tax without touching the Medicare bill — a useful thing to know so you do not expect savings that never come. The self-employed have the most to manage and the most levers. Half of the Medicare portion is deductible, so the real cost is lower than the headline; building that into your pricing and your set-aside keeps cash flow honest. Because nothing is withheld for you, the discipline is quarterly estimated payments — the calculator's quarterly figure is a starting point for what to reserve. Legitimate business deductions reduce net profit and therefore the Medicare base directly, which makes diligent expense tracking quietly valuable. Whatever your situation, the goal is to avoid the two unhappy endings: a large surprise bill from unwithheld surtax, or money tied up all year because too much was withheld. Modeling your wages, filing status and paycheck timing here lets you land near the middle, where what you set aside matches what you owe.
Frequently asked questions
What is the Medicare tax rate?
An employee pays 1.45% of Medicare wages and the employer matches it, so 2.9% reaches Medicare on each dollar. Someone who is self-employed pays the full 2.9% alone. High earners add a 0.9% surtax on the part of their earnings above a filing-status threshold. The base rate has stayed at 1.45% for decades.
Is there a wage limit on Medicare tax?
No. Unlike Social Security, which stops at an annual wage base, Medicare applies to every dollar of wages or net self-employment earnings with no ceiling. That is why someone earning $500,000 keeps paying Medicare on the whole amount — and, past the threshold, pays the extra 0.9% on top.
What is the Additional Medicare Tax of 0.9%?
It is a surtax on higher earners introduced by the Affordable Care Act. You pay an extra 0.9% on the earnings that rise above your threshold — a line that single and head-of-household filers reach at $200,000, joint filers at $250,000, and separate filers at just $125,000. Only the worker pays it — there is no employer share.
Does my employer match the 0.9% surtax?
No. The employer matches the regular 1.45% but never the surtax. The Additional Medicare Tax is entirely the employee's, which is why the employer view in this calculator shows the match without any 0.9% line. A self-employed filer, being both sides at once, still owes the surtax personally.
Why did my paycheck have surtax withheld when I won't owe it?
Employers must begin withholding the 0.9% once your pay with them crosses $200,000 for the year — a flat trigger that ignores your filing status. If you are married filing jointly with a $250,000 threshold, or your income falls short by year-end, more may have been withheld than you owe. Form 8959 reconciles it on your return and refunds the excess.
How much Medicare tax does a self-employed person pay?
First multiply net profit by 92.35% to get net earnings, then apply the full 2.9% Medicare rate. On $100,000 of profit that is $92,350 × 2.9% = about $2,678. Half of that Medicare portion is an above-the-line deduction, softening the blow, and the 0.9% surtax still applies to earnings above your threshold.
Do 401(k) contributions reduce my Medicare wages?
No. Traditional 401(k) deferrals lower your income-tax wages but not your Medicare wages, so the 1.45% is charged on your full pay. Some pre-tax benefits do shrink the Medicare base — health insurance premiums through a cafeteria plan and HSA contributions made by payroll deduction — which is why Box 5 can differ from Box 1 on a W-2.
Is the Medicare tax the same as my Medicare premiums?
No, and the difference matters. This is the Medicare payroll tax that funds the program while you work; it is not the Part B or Part D premium you pay once enrolled, nor the income-related IRMAA surcharge, nor anything about benefit eligibility. This tool estimates only the payroll tax and is not advice about Medicare coverage or benefits.
How is Medicare tax different from Social Security tax?
They are the two halves of FICA but behave differently. Social Security is 6.2% each side and stops at a yearly wage base; Medicare is 1.45% each side with no cap and an extra 0.9% for high earners. A self-employed person pays 12.4% Social Security up to the cap and 2.9% Medicare on everything. Use the Social Security tax tool for the other half.
Do both spouses' wages count toward the surtax threshold?
For a joint return the 0.9% surtax is figured on the couple's combined Medicare wages and earnings against the $250,000 threshold. Each employer, though, only watches its own $200,000 trigger, so a two-earner couple can owe surtax that no single paycheck withheld. Entering a spouse's wages as other Medicare wages here lets you see that combined effect.
What if I have both a job and self-employment income?
Your W-2 Medicare wages use up the surtax threshold first, and then any self-employment earnings beyond the remainder pick up the 0.9%. The regular 1.45% still comes out of the paycheck, and the full 2.9% still applies to your net self-employment earnings. Add your job's pay as other Medicare wages to lower the threshold the self-employed view uses.
Will the Medicare tax rate change this year?
The 1.45% and 2.9% rates and the 0.9% surtax have not changed across the years this tool supports, and the surtax thresholds have been frozen since they were written into law — they are not indexed to inflation. The year selector is kept for consistency and future-proofing, but for Medicare it currently makes no difference to the result.
Can I deduct any of the Medicare tax I pay?
An employee cannot deduct Medicare tax withheld from a paycheck. A self-employed filer can: half of the combined 15.3% self-employment tax — including the 1.45% that mirrors the employer's Medicare share — is an above-the-line deduction. The 0.9% Additional Medicare Tax is never deductible for anyone.
What wages does the 1.45% apply to?
It applies to Medicare wages, the amount in Box 5 of your W-2, which is usually your gross pay with a few pre-tax items removed. Tips, bonuses and most taxable fringe benefits are included. Because there is no wage cap, the figure simply grows with your pay rather than stopping at a limit.
Is this Medicare tax estimate official?
No. It is an educational estimate. Real paychecks involve rounding, employer-specific rules and pre-tax items this tool does not see, and a final return can differ. Treat the result as a planning guide, not as legal, payroll, accounting, investment, Medicare benefits, or tax advice, and confirm specifics with a qualified professional or the IRS.