For US citizens and green card holders in Poland, US tax compliance involves navigating a tax treaty from 1974, a helpful social security agreement, and complex rules for local investments. While the US-Poland income tax treaty exists, the Foreign Tax Credit is the primary tool for avoiding double taxation on earned income.
Key challenges for Americans in Poland include the US tax treatment of Polish retirement accounts like IKE, IKZE, and PPK, which are not considered 'qualified' by the IRS, and the rules for Passive Foreign Investment Companies (PFICs) that apply to most local mutual funds.
US filing basics every American abroad must know
US citizens and green-card holders are taxed on worldwide income wherever they live, and usually must file Form 1040 once gross income exceeds the IRS threshold ($15,750 for single filers, $31,500 for married filing jointly, and $23,625 for head of household for 2025), even when no tax is ultimately due. The tools that reduce double taxation are the Foreign Earned Income Exclusion (FEIE, up to $130,000 for 2025 under IRC §911) and the Foreign Tax Credit. Neither is automatic. The FEIE requires a tax home in a foreign country plus either the bona fide residence test or 330 full days abroad in a 12-month period, and it reaches earned income only. The Foreign Tax Credit is figured separately for each income category under IRC §904 and is capped at the US tax on the foreign income in that category, so it reduces double taxation without guaranteeing that none remains.
Two reporting rules catch most filers in Poland: the FBAR (FinCEN Form 114), required when foreign financial accounts exceed $10,000 in aggregate at any point in the year, and Form 8938 (FATCA) for specified foreign assets above the applicable threshold. Both can carry penalties even when no tax is owed. If you are behind, the Streamlined Filing Compliance Procedures are the usual path back for non-willful taxpayers. They run on two tracks: the foreign track carries no offshore penalty but requires meeting the program's non-residency test, and the domestic track carries a 5% offshore penalty but works through amended returns, so it does not fit someone who never filed at all. Tax and interest on the catch-up years are owed whichever route applies.
US tax treaty with Poland
The United States and Poland have an income tax treaty in force, signed in 1974. A newer treaty was signed in 2013 but has not been ratified by the US and is not in effect. The 1974 treaty aims to prevent double taxation, but its benefits for US citizens living in Poland are significantly limited by a 'saving clause' in Article 5(3).
This clause allows the US to tax its citizens as if the treaty did not exist. Consequently, Americans in Poland cannot use most treaty articles to exempt income from US tax. The treaty's main practical functions for individuals are reducing Polish withholding tax on payments like interest and dividends from Polish sources and providing rules for determining tax residency.
Article 5(3) (Saving Clause).
This clause preserves the United States' right to tax its citizens and residents on their worldwide income as if the treaty were not in force. This is the most critical article for US citizens, as it overrides many of the treaty's potential benefits, meaning they must still file a full US tax return and report all income.
Article 20 (Relief from Double Taxation).
This article, which is an exception to the saving clause, provides the mechanism for avoiding double taxation. It obligates the United States to provide a credit against US income tax for the income taxes paid to Poland. This Foreign Tax Credit is the primary way US citizens in Poland reduce or eliminate their US tax liability on Polish-source income.
| Income type | Treaty rate | Statutory rate | Notes |
|---|---|---|---|
| Dividends | 15% | 19% | 5% for dividends paid to a company that owns at least 10% of the voting stock of the paying company. |
| Interest | 0% | 20% | Exempt from tax. |
| Royalties | 10% | 20% |
Because of the saving clause, a US citizen living in Poland generally cannot use the treaty to exempt Polish-source earned income from US tax. Instead, they must report the income and then use the Foreign Tax Credit (based on taxes paid to Poland) to offset the US tax due.
Polish Retirement Accounts and US Tax
Poland's voluntary retirement savings plans, including the IKE (Indywidualne Konto Emerytalne), IKZE (Indywidualne Konto Zabezpieczenia Emerytalnego), and PPK (Pracownicze Plany Kapitałowe), present significant complexities for US persons.
These plans are generally not considered 'qualified' retirement plans under US tax law. This has several important consequences:
- No US Tax Deferral: Unlike a US 401(k), contributions are not deductible on a US return, and investment earnings (interest, dividends, capital gains) within the plan are generally considered taxable by the IRS in the year they are earned, even if not distributed.
- Foreign Trust Reporting: The IRS may classify these accounts as foreign trusts, which would otherwise call for Form 3520 (Annual Return To Report Transactions With Foreign Trusts) and Form 3520-A (Annual Information Return of a Foreign Trust With a U.S. Owner). Rev. Proc. 2020-17 exempts an eligible individual from that reporting for a tax-favored foreign retirement trust, but every condition has to be met: the plan must exist to provide retirement benefits, be tax-favored under Polish law, be the subject of annual information reporting to the Polish tax authorities, accept only contributions out of earned income, cap those contributions at a percentage of earned income or $50,000 a year or $1,000,000 over a lifetime, and restrict withdrawals to retirement age, disability, or death or penalize earlier ones. The individual must also be current on US income tax filing and have reported the plan's income. The exemption covers Forms 3520 and 3520-A only. It does not reach the FBAR or Form 8938, and it does not change how the income is taxed.
- PFIC Issues: If the IKE, IKZE, or PPK invests in non-US based mutual funds or ETFs, these are almost certainly Passive Foreign Investment Companies (PFICs). Each PFIC holding requires filing Form 8621, which involves complex calculations and often results in a high US tax liability.
- FBAR and Form 8938: The value of all Polish retirement accounts must be included when determining if an individual has a filing requirement for the Report of Foreign Bank and Financial Accounts (FBAR) and Form 8938 (Statement of Specified Foreign Financial Assets).
Investments, property, and capital gains in Poland
Investing in Poland requires careful attention to US tax rules. Any investment in Polish mutual funds, ETFs, or similar pooled funds will likely be classified as a Passive Foreign Investment Company (PFIC). Owning PFICs requires filing Form 8621 for each fund and can lead to punitive US taxation on gains and distributions, taxed at the highest ordinary income rates plus interest charges. It is a common and costly mistake for US expats.
For capital gains, such as from selling stocks, Poland typically applies a 19% flat tax. A US citizen must also report this sale on their US tax return. Crediting the Polish tax is not automatic. Under IRC section 865, gain on the sale of personal property by a US citizen is US-source unless your tax home is in a foreign country and foreign tax of at least 10% of the gain is actually paid on it, and a foreign tax credit needs foreign-source income to sit against. Where the gain does qualify as foreign-source, the Polish tax lands in the passive category, where the credit is capped at the US tax on your passive foreign-source income, so it may not cover the whole US tax on the gain.
Self-employment and companies in Poland
US citizens who own a business in Poland face specific US reporting requirements. A Polish company such as a Spółka z ograniczoną odpowiedzialnością (sp. z o.o.) or Spółka Akcyjna (S.A.) is a Controlled Foreign Corporation (CFC) only when US shareholders together own more than 50% of it by vote or by value, counting only those US shareholders who each own at least 10%. Holding 10% makes you a US shareholder for that test, but your stake alone does not make the company a CFC. Form 5471 can be required either way, because its filing categories also reach acquiring a stake that reaches 10%, acquiring another 10% on top, disposing of enough to drop below 10%, becoming a US person while already holding 10%, and controlling a foreign corporation. As a US shareholder of a CFC, you may have to pay current US tax on the company's earnings under the GILTI (Global Intangible Low-Taxed Income) or Subpart F income rules, even if the company does not distribute any profits to you.
For self-employed individuals, the US-Poland Totalization Agreement is very important. This agreement prevents double social security taxation. A self-employed US person living and working in Poland who is covered by the Polish social security system (ZUS) can obtain a Certificate of Coverage (Form PL/USA 1) from the Polish authorities. This certificate exempts them from paying US self-employment taxes (Social Security and Medicare) on their self-employment income.
Worked examples
Salaried employee at a Polish tech company (2025)
An American software developer earns a salary of 300,000 PLN (roughly USD 75,000) from a Polish employer. They pay Polish income tax and social security contributions throughout the year. On their US tax return, they report the 75,000 USD of income. Instead of using the Foreign Earned Income Exclusion, they choose to use the Foreign Tax Credit. Because Polish income tax rates are relatively high, the amount of Polish tax they paid is more than enough to offset the entire US tax liability on their salary, resulting in zero US tax due on that income. They must still report their Polish bank and PPK retirement accounts on the FBAR and potentially Form 8938.
Self-employed marketing consultant in Warsaw (2025)
A US citizen works as a freelance consultant in Warsaw, earning 200,000 PLN (roughly USD 50,000) in net self-employment income. They are registered with the Polish social security system (ZUS) and make their required contributions. They apply for and receive a Certificate of Coverage from ZUS. When filing their US tax return (Form 1040), they report the $50,000 of business income on Schedule C. They attach the Certificate of Coverage to Form 1040 and note the exemption on Schedule 2, without filing Schedule SE. This exempts them from the roughly $7,065 in US self-employment taxes they would otherwise owe. They will still owe US income tax on the profits, which can be offset by a Foreign Tax Credit for income taxes paid to Poland.
Retiree with US and Polish investments (2025)
A retiree living in Poland receives $30,000 in Social Security benefits and $10,000 in interest from a US bank account. Due to the saving clause, the US bank interest remains fully taxable by the US at regular income tax rates. The retiree also has a Polish investment account (IKE) valued at $150,000, which holds several Polish mutual funds. These funds are PFICs. Even though the retiree took no distributions, the funds generated $5,000 in internal earnings. Under default PFIC rules (IRC Section 1291), the internal earnings are not currently taxable, but punitive taxes and interest charges will apply when the funds are eventually sold or distributed. The retiree must still file multiple Forms 8621. The retiree must also report the IKE and other foreign accounts on the FBAR and Form 8938.
Common mistakes for Americans in Poland
- Assuming Polish retirement plans (IKE, IKZE, PPK) are treated like US 401(k)s for tax purposes; they are not, and earnings are generally taxable annually by the US.
- Forgetting to report Polish retirement and bank accounts on the FBAR (FinCEN Form 114) and Form 8938.
- Investing in Polish mutual funds or ETFs without realizing they are PFICs, leading to complex Form 8621 filings and punitive tax treatment.
- For self-employed individuals, unnecessarily paying US self-employment tax instead of obtaining a Certificate of Coverage under the US-Poland Totalization Agreement.
- For business owners, failing to file Form 5471 for a controlled Polish company (like a sp. z o.o.), which carries significant penalties.
- Believing the new US-Poland tax treaty signed in 2013 is in effect; it has not been ratified by the US, and the 1974 treaty remains the law.
- Trying to use the 1974 treaty to exempt earned income from US tax, not understanding that the saving clause prevents this for US citizens.
- Failing to report the sale of Polish stocks or property on a US tax return, assuming that paying the 19% Polish capital gains tax is sufficient.
Poland tax FAQ
Is there a US-Poland tax treaty?
Yes, a treaty signed in 1974 is in force. However, it contains a 'saving clause' that allows the US to tax its citizens on their worldwide income as if the treaty did not exist. Its main benefits for individuals are reduced withholding on Polish-source income and providing the legal basis for the Foreign Tax Credit.
Do I have to pay US Social Security tax if I'm self-employed in Poland?
Generally, no. The US-Poland Totalization Agreement allows you to be covered by only one country's system. If you live in Poland and are covered by the Polish social security system (ZUS), you can obtain a Certificate of Coverage to exempt yourself from US self-employment taxes.
Are my Polish retirement accounts (IKE, IKZE, PPK) tax-deferred in the US?
No. The IRS does not consider these 'qualified' retirement plans. This means that any earnings or growth inside the account are likely subject to US tax each year, even if you do not take a distribution. They also create FBAR, Form 8938, and potential PFIC reporting obligations.
What is a PFIC and should I be concerned in Poland?
A PFIC is a Passive Foreign Investment Company. You should be very concerned. Most non-US mutual funds and ETFs, including those widely available in Poland, are considered PFICs. Owning them requires annual filing of Form 8621 and can result in very high US tax rates on gains.
I own a small Polish company (sp. z o.o.). What are my US reporting duties?
Your company is a Controlled Foreign Corporation (CFC) when US shareholders together own more than 50% of it by vote or by value, counting only those US shareholders who each own at least 10%. Your own 10% stake makes you a US shareholder for that test but does not by itself make the company a CFC. Form 5471 is a very complex information return, and its categories reach more than CFC ownership: acquiring a stake that reaches 10%, acquiring another 10% on top, disposing of enough to drop below 10%, becoming a US person while already holding 10%, or controlling the company, can require it on its own. If the company is a CFC, you may also have to pay US tax on its profits under the GILTI and Subpart F rules, even if you receive no dividends.
How do I avoid being double-taxed on my Polish salary?
The primary mechanism is the Foreign Tax Credit, claimed on Form 1116. It is not an unlimited dollar-for-dollar offset. The credit is figured separately for each income category, and within a category it cannot exceed the share of your US tax attributable to your foreign-source income in that category. Polish tax on your salary sits in the general category, and because Polish rates are generally comparable to or higher than US rates, the credit often covers the US tax on the salary and leaves an excess credit you can carry back one year and forward ten. The Foreign Earned Income Exclusion is the alternative, and the same income cannot be both excluded and credited.
Do I need to report my Polish bank accounts to the US government?
Yes. If the total value of all your foreign financial accounts (including bank, investment, and retirement accounts) exceeds $10,000 at any point during the year, you must file a Report of Foreign Bank and Financial Accounts (FBAR). Depending on the balance, you may also need to file Form 8938 with your tax return.
Is interest from my US bank account taxable in Poland?
The tax treaty specifies how income is treated. For interest arising in the US and paid to a resident of Poland, the treaty allows only Poland (the country of residence) to tax it. However, because of the saving clause, the US will still tax its citizens on this interest.
Sources and last reviewed
- IRS, Poland tax treaty documents (verified 2026-06-07)
- IRS, U.S. Totalization (Social Security) Agreements (verified 2026-06-14)
- Poland's Official Tax Portal (verified 2026-06-07)
- IRS, Publication 901, U.S. Tax Treaties (verified 2026-06-07)
- IRS, Rev. Proc. 2020-17 (Forms 3520/3520-A exemption for tax-favored foreign retirement trusts) (verified 2026-08-12)
Reviewed by Ilya Fayerman, Esq. (NY Bar) on
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