Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Your FICA withholding
$9,180
Social Security
$7,440
Medicare (incl. additional)
$1,740
Employer's share
$9,180
Combined FICA paid
$18,360
Your monthly withholding
$765.00
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter annual wages ($).
- 2Enter additional medicare threshold ($).
- 3Read your your fica withholding on the right — it updates as you type.
- 4Hit Share to keep the scenario or send it to someone.
About this calculator
FICA is 7.65% from you and 7.65% from your employer. Social Security stops at the annual wage base; Medicare never stops, and adds another 0.9% above the high-earner threshold.
Worked example
Using the values the calculator loads with:
Inputs
- Annual wages: 120000 $
- Additional Medicare threshold: 200000 $
Results
- Your FICA withholding: $9,180.00
- Social Security: $7,440.00
- Medicare (incl. additional): $1,740.00
- Employer's share: $9,180.00
- Combined FICA paid: $18,360.00
- Your monthly withholding: $765.00
What each field means
Inputs
- Annual wages ($)
- The annual wages used in the calculation, measured in $. Starts at 120000 $ so you have a working example on load.
- Additional Medicare threshold ($)
- The additional medicare threshold used in the calculation, measured in $. Starts at 200000 $ so you have a working example on load.
Results
- Your FICA withholding
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Social Security
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Medicare (incl. additional)
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Employer's share
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Combined FICA paid
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Your monthly withholding
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the fica tax calculator work?
FICA is 7.65% from you and 7.65% from your employer. Social Security stops at the annual wage base; Medicare never stops, and adds another 0.9% above the high-earner threshold. The underlying maths is: Social Security 6.2% up to the wage base, Medicare 1.45% uncapped, plus 0.9% additional Medicare above the threshold.
What do I need to enter?
2 values: annual wages, and additional medicare threshold. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the your fica withholding result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). FICA Tax Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/fica
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/fica" target="_blank" rel="noopener">FICA Tax Calculator — RevenueLab</a> (2026).</p>
Source: [FICA Tax Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/fica) (2026).