US tax obligations while living in Poland
Poland — Kraków, Warsaw, Wrocław — is a fast-growing hub for US tech workers and founders, with low cost of living and strong IT salaries. Tax can be efficient via the 19% flat tax or 5% IP Box for software income. The wrinkle: the modern 2013 treaty was never ratified, so the 1974 treaty (older, narrower) still applies; totalization is in place.
TL;DR
Where Americans live in Poland
Poland hosts an approximately 30,000+ US expat population. The community concentrates in several cities with established expat infrastructure — international schools, English-speaking medical providers, American-style amenities, and active social communities. Below are the primary destinations.
Poland's local tax — what you need to know
Poland has a two-band PIT (12% / 32%) plus a health contribution, taxing residents on worldwide income. Business owners can use a 19% flat tax, a lump-sum on recorded revenue, or the 5% IP Box for qualifying IP income. Note: the modernized 2013 US-Poland treaty was signed but never ratified by the US Senate, so the older 1974 treaty still governs.
Special tax regime details
For business income, Poland offers a 19% flat PIT, a lump-sum-on-revenue regime, and a 5% IP Box for qualifying intellectual-property income (relevant for software/IT). These reduce Polish tax — model the US side separately. The governing US-Poland treaty is the 1974 one (the 2013 update remains unratified), so FTC planning matters.
✓ US-Poland Income Tax Treaty in force (signed 1974 (the 2013 treaty was never ratified, so 1974 still applies))
The treaty allocates taxing rights between the US and Poland, allows Foreign Tax Credit for {country} taxes paid against US tax on the same income, and reduces withholding rates on cross-border payments (dividends, interest, royalties). The Saving Clause preserves US right to tax its citizens regardless of treaty, but most operative provisions still apply for credit / sourcing purposes. The treaty significantly simplifies double-taxation planning compared to no-treaty countries.
Social Security totalization agreement
The US has a Totalization Agreement with Poland, which means self-employed Americans living in {country} do NOT pay US Self-Employment Tax (15.3%) on income already subject to {country}'s social security system. This is a substantial saving — without totalization, self-employed expats pay both US SE Tax AND foreign social security on the same earnings.
Residency and visa pathways to Poland
Poland Business Harbour (fast-track for tech founders/specialists), National (D) visa, EU Blue Card, Temporary Residence for business. No dedicated nomad visa, but PBH is a de-facto tech route.
Banking and FATCA notes for Poland
Polish banks (PKO BP, mBank, Santander Polska, ING) open accounts for residents with a PESEL; mBank/Revolut are popular with expats. FATCA reporting applies. Polish investment funds can be PFICs. Declare Polish accounts on FBAR/8938.
FAQ — US Expats in {country}
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