- Inbound / impatriate regime
- A temporary tax status for people who move into a country for work or investment, often with flat rates or exemptions ordinary long-term residents do not get.
- Substitute tax (imposta sostitutiva)
- A fixed payment that replaces progressive tax on a defined income class — Italy’s Art. 24-bis new-resident fee is the classic European HNWI example.
- Extraterritorial costs (30% ruling)
- Dutch concept: part of pay treated as reimbursement of costs of living/working away from the home country, so it is not taxed as ordinary wage.
- Modelo 149 / 151 (Spain)
- Modelo 149 elects, renounces, or ends Beckham Law with AEAT. Modelo 151 is the annual special-regime return while covered.
- EBF Art. 58-A / IFICI
- Portugal’s scientific research & innovation incentive: 20% special IRS on qualifying Cat A/B income for up to 10 years, regulated by Portaria 352/2024/1.
- WNT norm (Netherlands)
- Public-sector pay ceiling used to cap the 30% ruling’s tax-free base. In 2026 the norm is €262,000 → max €78,600 tax-free reimbursement.
- Category H (Portugal)
- Portuguese IRS pension category. Under IFICI, foreign pensions are carved out of the general foreign-income exemption (AT FAQs).
- 183-day / centre-of-life tests
- Common tax-residence tests. These regimes usually also need a lookback of prior non-residence — meeting 183 days alone does not grant Beckham, IFICI, 30%, or Art. 24-bis.
- Taxable salary (NL 30% norm)
- Belastingdienst’s 2026 floor (€48,013 / €36,497) is measured on salary remaining after the tax-free reimbursement — not on full gross pay.