Methodology & Data Sources

Transparency first. Here's exactly where our calculations come from.

💰 Tax & Social Calculations

Tax rates are sourced from official government tax authorities and verified by community testing.

Sources by Country:

  • UK: HMRC official rates, IR35 guidance (latest 2026 update)
  • Germany: Bundeszentralamt für Steuern (BZSt) + Sozialversicherung
  • Netherlands: Belastingdienst official tax tables
  • Belgium: SPF Finances - Official Belgian tax rates
  • Austria: Bundesministerium für Finanzen
  • Switzerland: State cantonal tax authorities (Zurich rate shown)
  • France: Direction Générale des Finances Publiques
  • Ireland: Revenue Commissioners Ireland
  • Italy: Agenzia delle Entrate official rates
  • Spain: Agencia Tributaria España
  • Luxembourg: Administration des Contributions et des Impôts

📊 Market Benchmark Day Rates

Real market data from verified freelancer platforms and recruitment agencies (2026).

Primary Sources:

  • UK: ContractorUK Market Rates (Feb 2026)
  • Europe: Index.dev European Developer Rates (2026)
  • Belgium: Freelancers in Belgium Official Data
  • Switzerland: MagicHeidi Swiss Rates
  • Southern Europe: RemotePass Global Data

⚠️ Important Disclaimer

RateParity provides estimates for educational purposes only. It is not tax, legal, or financial advice. Always consult professionals before making decisions based on these calculations.