Social-security contributions for the self-employed in Europe (2026): what you actually pay for

When people picture the cost of going solo, they picture income tax. But almost everywhere in Europe there is a second bill that catches new founders out — social-security contributions — and it is frequently the bigger of the two. As a team of one you are not just your own finance department; you are your own HR department too, and these contributions are the price of the safety net an employer used to pay for. This is the plain-English breakdown of what you actually pay for.

The second bill nobody warns you about

Most guides to taxes for solopreneurs describe three buckets, and this is the third — the one people underestimate. Income tax goes into general government revenue. Social contributions are different: they fund specific benefits tied to you, and in many countries a separate body collects them entirely — think URSSAF in France, ZUS in Poland, SVS in Austria, EFKA in Greece, or National Insurance contributions (NICs) in the UK.

The reason this bill surprises people is simple: as an employee you barely saw it. Your employer quietly paid a large slice on top of your salary, and your own share was deducted before the money ever hit your account. Go solo and both of those disappear — which means you now carry the whole thing yourself.

What your contributions actually fund

You are not paying into a void. Depending on the country, contributions buy some mix of:

• State pension — the public retirement layer. Often thinner for the self-employed, which is a big reason to read pension for the self-employed in Europe.
• Healthcare — access to the public health system for you (and sometimes dependants).
• Sickness and parental cover — sick pay and maternity/paternity allowances, though the self-employed often get less generous versions than employees.
• Unemployment — in some countries the self-employed are covered (sometimes optionally, sometimes not at all); in others there is simply no cover, which is its own argument for an emergency fund.
• Accident or invalidity insurance — sometimes bundled in, sometimes a separate line.

The exact menu is set by your country. The constant is that these are real entitlements you are funding — not a tax in the everyday sense, even though it leaves your account the same way.

Why you pay both halves yourself

This is the part that genuinely shocks first-year solos. For an employee, social contributions are split: the employer pays one portion (often the larger one) and the employee pays the rest. There is no employer in a one-person business — so the self-employed generally pay both the employee share and the employer-equivalent share themselves.

How they’re calculated (and why it varies so much)

There is no EU-wide formula. But a few patterns repeat across countries:

• Usually based on profit or declared income — not turnover. More profit, more contributions, much like income tax.
• Often a minimum floor. Several countries levy a minimum contribution even in a thin or loss-making month, so a low-income solo can still owe a baseline amount. This is one of the most unpleasant surprises for people who assumed “no profit, no bill”.
• Sometimes an upper cap. A handful of systems cap the income on which contributions are charged, so very high earners stop paying above a ceiling.
• Sometimes flat or simplified. Some flat-rate schemes (the kind covered in the taxes guide) bundle a simplified contribution into one percentage, which is part of why those regimes feel so much lighter for small turnovers.

Because the rate, the floor, the cap and the very name all change at the border, never assume the number from one country applies in another. Find your own body’s published rate and plan around it.

Cross-border: you pay in one country, not several

If you work across EU/EEA borders — a client in another member state, a few months working abroad, or a genuinely multi-country setup — the natural fear is paying social security twice. EU social-security coordination rules exist precisely to stop that: you are insured in, and contribute to, one country at a time.

The practical instrument is the A1 certificate. Issued by your home social-security authority, it certifies which country your social cover belongs to while you operate temporarily elsewhere, so another state cannot also charge you. The rules for which country applies when you genuinely work in several at once are specific and worth getting right — they are part of the EU admin guide, and a case where a short conversation with your national body or an accountant pays for itself.

Treat it like tax: budget, set aside, get advice

The discipline is identical to the tax habit. When a client pays you, part of that money was never really yours — it belongs to your future pension, your healthcare and the state’s social system:

• Find your real rate from your national body and add it to your set-aside percentage.
• Move the money the moment you’re paid, into the same kind of separate pot you use for tax — the free tax set-aside calculator is a simple way to size both at once.
• Account for any minimum, so a quiet month doesn’t blindside you.
• Get local advice for cross-border work, structure choices, or anything where being wrong is expensive — exactly as with taxes for solopreneurs.

The takeaway

• Social contributions are a second bill, separate from income tax — and often the bigger, more surprising one.
• They fund real cover: state pension, healthcare, sickness/parental, and sometimes unemployment.
• With no employer, you pay both halves yourself — the employee and the employer-equivalent share.
• They’re usually charged on profit, with possible minimums and caps, and vary enormously by country (URSSAF, ZUS, SVS, EFKA, the UK’s NICs — names and rates all differ).
• Cross-border, you pay in one country under EU coordination rules — the A1 certificate proves which one.
• Budget for them like tax: set the money aside as you earn, and verify your own rate with your national body before relying on any figure.

Part of the complete EU admin guide for solopreneurs.