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Medicare Tax Calculator

Work out medicare tax instantly with clear inputs, formula shown and shareable results.

About Medicare Tax Calculator

Unlike social security there is no wage cap: the base rate applies to all wages, and an additional rate applies to earnings above a threshold. The additional charge is on the employee only, with no employer match.

Formula

Medicare tax

Tax = wages × base rate + max(0, wages - threshold) × additional rate

Worked example

With the default values below, Medicare Tax Calculator returns Total Medicare Tax of $4,780.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Annual Wagesminimum 0
280,000
Base Rateaccepts 0–5 %
1.45 %
Additional Rate On High Earningsaccepts 0–5 %
0.9 %
Additional Rate Thresholdminimum 0
200,000

Results

Total Medicare Tax
$4,780.00
Base Rate Tax
$4,060.00
Additional High-Earner Tax
$720.00
Effective Rate On Wages
1.7071%

Step by step

  1. 1Values used
  2. 2Medicare tax
  3. 3Total Medicare Tax= 4,780.00
  4. 4Base Rate Tax= 4,060.00
  5. 5Additional High-Earner Tax= 720.00
  6. 6Effective Rate On Wages= 1.7071

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or fees or charges into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Tax figures are estimates based on the rates, caps and thresholds you enter. Real rules differ by jurisdiction and change every year, and personal circumstances alter the outcome. This is not tax or financial advice — confirm with a qualified adviser.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Tax figures are estimates based on the rates, caps and thresholds you enter. Real rules differ by jurisdiction and change every year, and personal circumstances alter the outcome. This is not tax or financial advice — confirm with a qualified adviser.

Frequently Asked Questions

Does the employer match the additional rate?

No. The employer matches only the base rate; the surcharge is entirely the employee's.

Is investment income included?

A separate net investment income tax can apply at a similar rate, but it is a different charge.

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