Dual citizens usually must file tax returns in both countries, but they rarely pay full taxes on the same income twice due to foreign tax credits, deductions, and tax treaties. The United States and Eritrea are unique in taxing based on citizenship, meaning U.S. citizens must file regardless of where they live.
Yes, dual citizens often have tax filing obligations in both countries, but you usually don't pay double the tax due to tax treaties and credits (like the Foreign Tax Credit), which prevent full double taxation by letting you subtract foreign taxes paid from your U.S. liability or exclude certain foreign income, though reporting is still required for worldwide income. The U.S. taxes citizens on worldwide income regardless of residence, while other countries typically tax residents on their income.
U.S. citizens, green card holders, and expats earning income abroad can all face double taxation, whether it's from salaries, business profits, investments, or other sources.
Understanding How Dual Rate Income Tax Works
With dual rate income tax, all income will be taxed at the lower rate up to the cutoff income level, and all income above the cutoff point is taxed at the higher rate. This is similar to a flat tax structure but instead of just one rate, it has two.
To avoid double taxation, use "pass-through" business structures like LLCs or S Corporations where profits are taxed only once at the owner's individual rate, instead of C Corporations which are taxed at the corporate level and again on dividends; alternatively, C Corp owners can pay salaries, retain earnings strategically, or use income splitting, while international earners rely on foreign tax credits or treaty provisions.
Dual citizens often have the right to live, work, and study in both countries without the need for visas or work permits. This can be particularly beneficial for individuals who want to explore opportunities in multiple countries, whether for personal or professional reasons.
The new dual citizenship bill, officially called the Exclusive Citizenship Act of 2025, is a proposal that would ban dual citizenship for Americans and require individuals to choose one nationality. The bill is not law, and dual citizenship remains fully legal today.
Dual Citizenship at Birth
If you were born a dual citizen, you may be able to avoid the exit tax—but only if: You still hold citizenship in your other country at the time of expatriation. You have been a U.S. resident for no more than 10 of the last 15 years (as defined for tax purposes).
Federal regulators routinely examine banks for compliance. For example, if a customer regularly sends wires to the UK, a bank may want to know if that customer is a dual citizen of the United States and the UK.
There's a proposed bill in the U.S. Senate, the Exclusive Citizenship Act of 2025, that aims to end dual citizenship by requiring Americans to have "sole and exclusive allegiance" to the U.S., potentially forcing millions to choose between their American and foreign nationalities within a year of the law's enactment, or risk losing their U.S. citizenship, though legal experts question its passage due to existing Supreme Court precedent.
While the U.S. can legally tax you twice on the same income, most American expats never pay taxes twice. The IRS provides powerful tools like the Foreign Earned Income Exclusion and Foreign Tax Credit that eliminate or significantly reduce double taxation for Americans living abroad.
No, a U.S. citizen generally cannot be denied entry back into the United States, but they can face significant delays, extensive questioning, searches of belongings (including electronic devices), or even arrest if criminal issues are discovered during the process, especially with a valid U.S. passport. While a citizen has the right to enter, CBP can detain devices for deeper inspection under border search exceptions, though they can't force a password for a U.S. citizen.
One easy way to pay no income tax is to have little or no taxable income. For tax year 2025, taxpayers receive a standard deduction of $15,750 (singles or married persons filing separately) or $31,500 (marrieds filing jointly). For heads of households, the standard deduction is $23,625 for tax year 2025.
You must file Form 1040, U.S. Individual Income Tax Return, if you are a dual-status taxpayer who becomes a U.S. resident during the year and who is a resident of the U.S. on the last day of the tax year. Write "Dual-Status Return" across the top of the return.
WASHINGTON – Today, Senator Bernie Moreno (R-Ohio) introduced the Exclusive Citizenship Act of 2025 to establish that citizens of the United States must have sole and exclusive allegiance to the United States.
The benefits of a dual citizenship include greater travel freedom and added personal security during political or global instability. The benefits of having a dual citizenship also extend to long-term stability and opportunities for you and your family.
Being a dual national comes with certain advantages, including the ability to work and travel freely and access to social services.
Because of that, a dual citizen can vote, work, own property, and use public services across both countries.