U.S. Expats in Costa Rica: One Move, Two Tax Systems

EAS LATAM
Mar 17
2 min read

Gabriela Páez. Tax Manager

As the April 15, 2026 filing deadline approaches—with an automatic extension to June 15, 2026 for U.S. taxpayers living abroad—U.S. expats in Costa Rica are entering the final stretch: not because tax rates are changing, but because compliance gaps are becoming visible.

Most U.S. expats move to Costa Rica thinking they simplified their taxes. In reality, they did the opposite. They moved from one system into two, one based on worldwide income (U.S.) and another based on territorial taxation (Costa Rica), and the risk is no longer what you pay, but how you align both.

Costa Rica taxes primarily Costa Rican-source income, including capital gains generally at 15%, while the United States continues taxing its citizens and residents on global income regardless of where they live. This means that U.S. expats with businesses, investments, or active income streams across both jurisdictions are often taxable in both countries at the same time.

Even for those already operating as cross-border taxpayers or commonly referred to as “expats” it is important to clarify that unless there has been a formal expatriation under U.S. tax law, full IRS compliance still applies. In practice, this creates a dual reporting and taxation environment, not an exemption scenario.

Because there is no income tax treaty between the U.S. and Costa Rica, double taxation is not eliminated, it is managed. The primary mechanism is the Foreign Tax Credit (FTC), which allows certain income taxes paid in Costa Rica to be credited against U.S. tax on the same income. This is a key relief tool, but it requires proper alignment of income characterization and timing. The Foreign Earned Income Exclusion (FEIE) may provide additional relief on active income, but it does not apply to passive income and does not eliminate filing or self-employment tax exposure.

At the same time, compliance does not stop at income tax. FATCA (Foreign Account Tax Compliance Act) and FBAR (Foreign Bank Account Report) continue to impose reporting obligations on foreign financial assets and accounts, regardless of whether tax is ultimately due. State-level exposure in the U.S. may also persist depending on domicile and presence rules.

Finally, social security remains a hidden layer of risk. Contributions to the U.S. system (SSA – Social Security Administration) may still apply, particularly for self-employed individuals, while Costa Rica requires participation in the CCSS (Caja Costarricense de Seguro Social). With no totalization agreement between the two countries, dual contributions are a real possibility.

The takeaway is simple: U.S. expats in Costa Rica are not operating in a tax-free environment, they are operating in a dual-system environment that requires coordination, not assumptions.

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