Social security contributions are compulsory payments that fund state benefits such as pensions, unemployment support, sickness pay and, in many countries, public healthcare. They are usually split between employees and employers, and the self-employed pay their own version. Although they behave like a tax, they are ring-fenced for social insurance rather than general government spending.
The weight of these contributions varies dramatically across borders. In the United States workers and employers each pay 6.2% for Social Security plus 1.45% for Medicare. The United Kingdom uses National Insurance. Continental Europe tends to charge far more: France and Italy layer several employer contributions that can add 30% or more on top of gross salary, while Germany splits pension, health, care and unemployment insurance roughly evenly between the two sides.
Consider a German employee on a 4,000 monthly salary. Combined employee contributions of around 20% would deduct roughly 800, with the employer paying a similar amount separately, so the true cost of employment is well above the headline wage.
- Employees see them as payslip deductions.
- Employers pay a matching or larger share.
- The self-employed cover them through self-employment tax.
They combine with income tax to shape take-home pay. Compare the full burden using the compare taxes by country tool.