Social Security Tax Calculator: 2025 OASDI & Medicare Breakdown
Figure payroll taxes with our Social Security Tax Calculator. For 2025, employee pays 6.2% OASDI (cap $176,100) + 1.45% Medicare; employer matches; self-employed 12.4% + 2.9%. Add 0.9% Medicare over thresholds. Guide covers rates, base, self-employed deduction, tips. Pair with Payroll Tax Calculator.
What is Social Security Tax?
FICA: 6.2% OASDI + 1.45% Medicare each side. Funds benefits; wage base adjusts yearly.
Why Calculate It?
Benefits:
- Net Pay: Accurate take-home.
- Self-Employed: SE tax planning.
- High Earners: Extra Medicare.
- Withholding: Adjust W-4.
Link to Net Pay Calculator.
2025 Rates & Wage Base
OASDI: 6.2% to $176,100. Medicare: 1.45% unlimited + 0.9% over $200k single/$250k joint.
Employee vs Employer vs Self-Employed
Employee: Half. Self: Full, deduct 50% AGI.
Additional Medicare Tax
0.9% on wages over threshold; no cap.
Calculation Example
$150k employee single: $9,300 OASDI + $2,175 Medicare = $11,475 total FICA.
Self-Employed Tips
Deduct half on 1040; pay quarterly.
Exemptions & Special Cases
Some ministers, students; no opt-out.
Common Mistakes
Forgetting cap, extra Medicare, self-deduction.
Planning Strategies
Defer income, retirement contributions reduce base.
Conclusion
Know your share with our Social Security Tax Calculator—2025 accurate for planning. Explore Self-Employed Tax. Calculate today!
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