It is one of the most debated topics among Polish professionals — especially IT specialists, consultants and managers. An employer says: "We could do this as B2B instead of employment — same money, more flexibility." But is it really the same? In 2026, the answer depends on your income level, family situation, and choice of tax regime.
The Core Difference: Employment Contract (UoP) vs Sole Trader (JDG)
On an employment contract (umowa o pracę), you are an employee — your employer handles most contributions and bears legal employment risk. As a sole trader (JDG), you are an entrepreneur: you pay your own ZUS contributions, keep books, and choose your taxation method.
ZUS Contributions for B2B in 2026
A B2B sole trader has several ZUS options:
- Preferential ZUS (first 24 months of JDG): social contributions approx. 400–500 PLN/month, health insurance calculated separately.
- Mały ZUS Plus (Small ZUS+): if prior-year revenue did not exceed 120,000 PLN — contributions scaled to actual income.
- Full ZUS: in 2026 approximately 1,800–2,000 PLN/month including health insurance (at linear tax, the health insurance base = 4.9% of income).
Tax Regimes for Sole Traders
- Progressive scale (skala): 12%/32% — like employment, but business costs are deductible.
- Flat tax (podatek liniowy): flat 19% regardless of income; beneficial above roughly 120,000 PLN annual profit.
- Lump-sum (ryczałt): rates from 8.5% to 17% on revenue (no cost deduction). For IT programmers and consultants the rate is 12%.
Side-by-Side Example: 12,000 PLN per Month
Employment (UoP) — 12,000 PLN gross
- Employee ZUS: 12,000 × 13.71% = 1,645 PLN
- NFZ health: (12,000 – 1,645) × 9% ≈ 931 PLN
- PIT advance: approx. 1,015 PLN (12%, after relief and costs)
- Net take-home: approx. 8,409 PLN
B2B (lump-sum 12%, full ZUS)
- Invoice: 12,000 PLN (+ VAT if registered)
- ZUS + NFZ (full, linear): approx. 1,900 PLN/month
- Lump-sum tax 12% on 12,000 PLN = 1,440 PLN
- Net take-home: approx. 8,660 PLN
The difference is roughly 250 PLN/month in favour of B2B — assuming no days off or sick leave.
What a Simple Comparison Ignores
- Annual leave and sick pay: fully paid on employment. On B2B — no revenue for days not worked (unless you pay optional sickness contribution).
- Employment law protection: redundancy pay, notice periods, Kodeks pracy. On B2B — only what the civil contract says.
- Running costs: accountant (150–400 PLN/month), ZUS obligations even in months without client work.
- Lower future pension: years of minimal ZUS contributions translate directly to a lower state retirement benefit.
When Does B2B Actually Make Sense?
B2B is typically advantageous when:
- You earn above 10,000–12,000 PLN gross per month.
- You have a stable, long-term client relationship.
- You have genuine deductible business costs (equipment, office, car).
- You work with multiple clients and value flexibility.
Use our calculator to model your own scenario — it covers all ZUS variants and tax regimes for 2026.
Compare now: B2B vs Employment Contract Calculator →