Medicare Tax Calculator
Calculate Medicare (HI) tax: 1.45% on all wages + 0.9% above $200k
2025 Medicare Tax Rates
Regular Medicare
1.45%
On ALL wages
Additional Medicare
0.9%
Over $200k (HOH)
Max Total Rate
2.35%
For high earners
Key Difference from Social Security:
Medicare tax has NO wage base limit. Unlike Social Security (capped at $176,100), you pay Medicare tax on every dollar you earn, no matter how high your income.
Medicare Tax by Income Level
| Annual Wages | Regular (1.45%) | Additional (0.9%) | Total Medicare Tax |
|---|---|---|---|
| $50,000 | $725 | $0 | $725 |
| $75,000 | $1,088 | $0 | $1,088 |
| $100,000 | $1,450 | $0 | $1,450 |
| $150,000 | $2,175 | $0 | $2,175 |
| $200,000 | $2,900 | $0 | $2,900 |
| $225,000 | $3,263 | $225 (on $25k excess) | $3,488 |
| $250,000 | $3,625 | $450 (on $50k excess) | $4,075 |
| $300,000 | $4,350 | $900 (on $100k excess) | $5,250 |
| $500,000 | $7,250 | $2,700 (on $300k excess) | $9,950 |
Additional Medicare Tax Details
Enacted in 2013 as part of Affordable Care Act. Extra 0.9% Medicare tax on high earners to help fund ACA.
| Filing Status | Threshold | Tax on Excess |
|---|---|---|
| Head of Household | $200,000 | 0.9% |
| Single | $200,000 | 0.9% |
| Married Filing Jointly | $250,000 | 0.9% |
| Married Filing Separately | $125,000 | 0.9% |
Important Withholding Rule:
Employers withhold Additional Medicare Tax once YOUR wages exceed $200k, regardless of filing status. If HOH making $210k, employer withholds 0.9% on $10k. If married filing jointly earning $230k total, you may owe more at tax time (threshold $250k but employer only sees $200k).
Detailed Calculation Examples
Example 1: Under Threshold
HOH earning $125,000:
• Regular Medicare: $125,000 × 1.45% = $1,813
• Additional Medicare: $0 (under $200k)
Total: $1,813
Withheld from every paycheck throughout year
Example 2: Exactly at Threshold
HOH earning $200,000:
• Regular Medicare: $200,000 × 1.45% = $2,900
• Additional Medicare: $0 (at threshold, not over)
Total: $2,900
No additional Medicare tax unless exceed $200k
Example 3: High Earner
HOH earning $350,000:
• Regular Medicare: $350,000 × 1.45% = $5,075
• Additional Medicare: ($350k - $200k) × 0.9% = $1,350
Total: $6,425
Effective rate: 1.84% (blend of 1.45% and 2.35%)
Example 4: Bonus Mid-Year
HOH earning $180k salary + $50k December bonus:
• Salary Medicare (Jan-Nov): $180k × 1.45% = $2,610
• Bonus regular Medicare: $50k × 1.45% = $725
• Additional Medicare starts: $230k total - $200k = $30k excess
• Additional withholding: $30k × 0.9% = $270
Total: $3,605
Employer withholds extra 0.9% from December bonus
Self-Employment: 2.9% Rate
Self-employed pay both employee and employer portions of Medicare tax (2.9% total), plus Additional Medicare Tax (0.9%) if over threshold.
Example: $100k Self-Employment Income
• Net SE income: $100,000
• × 92.35%: $92,350
• Medicare tax: $92,350 × 2.9% = $2,678
• Deduct half: $1,339 reduces AGI
Example: $250k Self-Employment Income
• Net SE income: $250,000
• × 92.35%: $230,875
• Regular Medicare: $230,875 × 2.9% = $6,695
• Additional Medicare: ($230,875 - $200k) × 0.9% = $278
Total: $6,973
Only regular portion ($6,695) qualifies for 50% deduction
Key Difference:
Can deduct half of regular Medicare tax (2.9%) but NOT the Additional Medicare Tax (0.9%). Only the 2.9% counts as "employer portion."
What Income is Subject to Medicare Tax?
✓ SUBJECT TO MEDICARE:
- •All wages and salaries
- •Bonuses and tips
- •Self-employment income
- •Commissions
- •Pre-tax 401(k) contributions
✗ NOT SUBJECT:
- •Investment income
- •Rental income
- •Retirement distributions
- •Social Security benefits
- •Unemployment benefits
Net Investment Income Tax (NIIT):
There's a separate 3.8% Medicare surtax on investment income (not wages) for high earners. Different from Medicare tax on wages. Applies if MAGI over $200k for HOH.
💡 Medicare Tax Planning
1. No Relief from Additional Medicare Tax
Unlike Social Security (stops at $176k), Medicare tax continues forever. No way to avoid on W-2 wages.
2. Watch Year-End Bonuses
If salary is $190k and you get $20k December bonus, additional 0.9% kicks in on $10k. Extra $90 withheld from bonus check.
3. Adjust W-4 if Underpaid
Employer withholds additional Medicare at $200k regardless of filing status. If married earning $230k combined, may need extra withholding (threshold $250k joint).
4. Self-Employed: Quarterly Payments
Include Medicare tax in estimated payments. 2.9% + 0.9% adds up fast. Don't forget in calculations.
5. S-Corp Strategy Benefit
S-Corp distributions avoid Medicare tax (only pay on salary). Major savings for high-earning self-employed.