What you need to know
"Low tax" doesn't always mean zero tax. Some countries (UAE, Bahamas) have no personal income tax; others (Portugal, Greece, Italy, Malta) offer special expat regimes for the first 5–15 years.
Czech Republic ranks highly in our list. The key practicalities are tax-residency triggers (usually 183 days/year), substance requirements, and whether your home country has a double-tax treaty with your destination.
Americans need extra care: citizenship-based taxation means low-tax countries don't eliminate US filing obligations, only reduce double taxation through the FEIE or Foreign Tax Credit.