🇵🇹 Portugal vs 🇺🇸 United States
Tax residency, treaties and PE risk compared.
| Dimension | 🇵🇹 Portugal | 🇺🇸 United States |
|---|---|---|
| Residency rule | 183 days OR habitual residence on 31 Dec | Citizenship-based + Substantial Presence |
| Day threshold | 183 days | 183 days |
| Warning band | from 150d | from 122d |
| Tax range | 14.5–48% (NHR 20%) | 10–37% federal + state |
| Tax treaties | 80+ | 70+ |
| PE risk | Medium | High |
| Digital nomad visa | Yes | No |
| Best for | IFICI / NHR 2.0 applicants in scientific and tech roles | US citizens optimising via FEIE ($126,500) and treaty benefits |
| Common pitfall | Owning or renting a home on Dec 31 can establish residency regardless of day count. | US citizens are taxed on worldwide income forever — there is no day-count exit. |
Verdict
For most nomads optimising for residency safety, 🇵🇹 Portugal is the lower-risk base versus 🇺🇸 United States. United States's high PE risk and 183-day rule make it easier to trip into full residency.
Deep dive
🇵🇹 Portugal residency rules →
Deep dive
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