Retirement Account Tax Treatment by Country
How 16 countries treat Roth IRA, Traditional IRA/401(k), and Social Security income for US retirees who become tax residents there. Every claim is labeled by confidence — Settled means documented and consistent across sources, Contested means tax authorities haven't ruled and professional opinion is divided, and Unclear means no authoritative source directly addresses it. This is not tax advice — see each country's full page for sources and a recommended advisor type.
Argentina
Roth IRA Unclear
No authoritative source directly addresses Roth characterization. Genuinely unresolved rather than contested — insufficient public guidance exists either way.
Traditional IRA / 401(k) / Pension Unclear
Argentina taxes worldwide income for tax residents (5-35% progressive) but 'Pensionado status does not create a blanket tax exemption... should be reviewed case-by-case with a tax professional' per specialist source.
Social Security
Not specifically confirmed by any source reviewed; no treaty exists to provide a baseline answer.
Key consideration: No treaty, no totalization agreement, and genuine lack of public guidance on account-specific treatment. Requires more individualized professional research than any other country in this guide. Argentina's history of rapid tax policy changes compounds this.
Recommended advisor: Argentina-specific tax professional with direct current experience filing Argentine returns for US retirees with IRA/401k income
Costa Rica
Roth IRA Settled
Not taxed by Costa Rica — territorial system exempts all foreign-source income.
Traditional IRA / 401(k) / Pension Settled
Not taxed by Costa Rica, same territorial-system reasoning.
Social Security
Not taxed by Costa Rica; up to 85% remains includable in US taxable income regardless.
Key consideration: Must be able to document income as genuinely foreign-source (contracts, payment records). Trivial for standard retirement income; more relevant with mixed income streams or local work.
Recommended advisor: US-side CPA or enrolled agent; Costa Rica-side complexity is minimal for pure foreign-source retirees
Croatia
Roth IRA Unclear
No country-specific source identified addressing Roth IRA treatment. Genuine research gap, not a confirmed answer either direction.
Traditional IRA / 401(k) / Pension Unclear
US tax treaty confirmed in force, but specific application to IRA/401k income not addressed in sources reviewed.
Social Security
Not specifically confirmed by any source reviewed.
Key consideration: Genuine research gap — requires direct professional research rather than relying on any general assumption, favorable or unfavorable.
Recommended advisor: Croatia-specific cross-border tax specialist or treaty-network specialist to review the pension article of the US-Croatia treaty directly
Cyprus
Roth IRA Contested
Under standard residency, explicitly described as unresolved — 'complex and varies.' Treaty savings clause and separate Cyprus taxing rights both apply, reconciled via credits rather than exemption.
Traditional IRA / 401(k) / Pension Contested
Under standard residency: contested, treaty allocation may give Cyprus taxing rights alongside the US. Under Cyprus Non-Dom regime specifically: foreign pensions described as 'largely exempt.'
Social Security
Taxable only in US under treaty savings clause, but Cyprus 'may also tax as worldwide income' per one source — confirm directly.
Key consideration: Choice between standard tax residency (treaty-based, contested) and the Non-Dom regime (explicitly favorable for foreign pensions) is the most consequential decision.
Recommended advisor: Cyprus-specific cross-border tax specialist to confirm Non-Dom eligibility and account treatment
Ecuador
Roth IRA Settled
Not taxed by Ecuador — territorial system exempts foreign-source income, consistent with Traditional accounts.
Traditional IRA / 401(k) / Pension Settled
Generally exempt under territorial system, similar to Panama/Costa Rica. However, one detailed source shows retirees actually filing and owing modest amounts (~$400-600/year on $22,800 SS) before an over-65 deduction (~$23,444 in 2026) typically zeroes it out — more filing formality than Panama's approach.
Social Security
Not taxed by Ecuador; SSA International Direct Deposit wires benefits directly with no Ecuadorian tax on transfer.
Key consideration: Plan to actually file an Ecuadorian return and claim the over-65 deduction explicitly rather than assuming automatic exemption like Panama. Confirm whether holding a residency visa triggers a tax-residency presumption regardless of days spent in-country.
Recommended advisor: US-side CPA or enrolled agent with specific Ecuador experience
France
Roth IRA Contested
Genuinely unresolved. Some advisors argue a 2009 treaty protocol amendment brings Roth IRAs within Article 18's protective scope; others recommend declaring distributions and seeking case-by-case treaty relief.
Traditional IRA / 401(k) / Pension Contested
Two named professional sources reach opposite conclusions on Article 18: one says the US has exclusive taxing rights (source-country); another says France has exclusive taxing rights as 'standard OECD pension treatment' (residence-country). This is the most contested single question in this entire guide.
Social Security
Taxed exclusively by the US as the paying state — the one point of clear agreement across sources.
Key consideration: Given the genuine unresolved disagreement over which country has primary taxing rights on Traditional IRA/401k distributions, get a specific written opinion before relying on either interpretation — the financial difference is not small. Separately, French social charges (CSG/CRDS, ~17.2%) on investment income are not treaty-covered or creditable.
Recommended advisor: Cross-border tax specialist licensed in both US and France, asked to directly address the Article 18 source-vs-residence disagreement
Greece
Roth IRA Settled
May be taxed as ordinary income despite US tax-free status; Greece does not automatically recognize Roth's unique character.
Traditional IRA / 401(k) / Pension Settled
Explicitly covered by the 7% flat-tax regime for qualifying pensioners (up to 15 years), subject to documentation showing the account relates to past employment. Standard progressive rates otherwise apply (9-44%).
Social Security
Sources list Social Security among income types covered by the 7% flat rate itself, differing structurally from Italy where SS is US-exclusive. Confirm directly.
Key consideration: 15-year regime duration is the longest reviewed in this guide, with no small-town residency requirement unlike Italy. Confirm Social Security treatment specifically, since it appears to fall under the 7% rate rather than being US-exclusive.
Recommended advisor: Greece-specific cross-border tax specialist to confirm both account qualification and Social Security treatment
Italy
Roth IRA Contested
Not tax-free under standard rules. Whether a Roth qualifies as 'pension income' for the 7% flat-tax regime is genuinely uncertain and case-specific.
Traditional IRA / 401(k) / Pension Contested
Taxed as ordinary income under standard rules (up to ~43%). Under the 7% flat-tax regime for qualifying pensioners relocating to small southern municipalities (population up to 30,000 as of April 2026), same income taxed at just 7% for up to 10 years — IF the account qualifies as pension income, which requires confirmation.
Social Security
Taxed exclusively by the US under treaty, confirmed by professional forum guidance; not taxed by Italy under either regime.
Key consideration: Confirm 7%-regime eligibility for specific account types before moving — the gap between 7% and standard progressive rates (up to ~43%) is enormous. Roth-heavy retirees should consider restructuring before residency given the account-qualification uncertainty.
Recommended advisor: Cross-border tax specialist with specific experience confirming 7%-regime qualification for self-directed US retirement accounts
Malta
Roth IRA Unclear
Appears on a general comparative list as 'favorable' alongside the UK — but the UK is directly contradicted by more detailed research (HMRC does not recognize Roth status), casting doubt on the list's reliability. No Malta-specific detailed source found.
Traditional IRA / 401(k) / Pension Unclear
Not specifically addressed in sources reviewed. Malta's Non-Dom remittance-basis system (foreign income taxed only if remitted) may be relevant but requires direct confirmation for retirement accounts specifically.
Social Security
Not confirmed by any source reviewed.
Key consideration: Malta's general 'tax-friendly for retirees' reputation is not the same as confirmed retirement-account treatment — the gap between reputation and confirmed specifics is the widest of any country in this guide.
Recommended advisor: Malta-specific cross-border tax specialist, explicitly asked to address Roth and Traditional IRA treatment directly
Mexico
Roth IRA Unclear
No authoritative source directly confirms treatment. One general source suggests the treaty 'generally recognizes' tax-deferred character, but this is not corroborated by specialist cross-border firms.
Traditional IRA / 401(k) / Pension Contested
Depends on actual tax residency status under Mexican domestic law ('center of vital interests' test), not visa type. Temporary residents/non-tax-residents: generally untaxed. Genuine tax residents: taxable under Article 19, with US FTC available.
Social Security
Taxable only by the US under Treaty Article 19(1)(b), regardless of Mexican residency status.
Key consideration: Determining actual Mexican tax residency status (vs. simply holding a residency visa) is the single most important factor and changes the answer materially.
Recommended advisor: Cross-border tax specialist who can assess 'center of vital interests' facts under Mexican domestic law
Panama
Roth IRA Settled
Not taxed by Panama — territorial system exempts all foreign-source income regardless of type or amount.
Traditional IRA / 401(k) / Pension Settled
Not taxed by Panama, same territorial-system reasoning as Roth.
Social Security
Not taxed by Panama.
Key consideration: No local-rate-minimization question exists since Panama taxes none of this income. FEIE only shelters earned income, not retirement distributions — most retirees rely on standard 1040 filing rather than treaty provisions.
Recommended advisor: US-side CPA or enrolled agent experienced with expat filings
Philippines
Roth IRA Unclear
No country-specific source directly addresses Roth characterization, though the SRRV program's general foreign-source exemption is a favorable signal worth confirming for this specific account type.
Traditional IRA / 401(k) / Pension Unclear
US tax treaty in force. SRRV visa holders benefit from a foreign-source income exemption per this site's Philippines profile, which likely extends to retirement account distributions but requires direct confirmation.
Social Security
Not specifically confirmed by any source reviewed.
Key consideration: The SRRV foreign-source income exemption is the most favorable signal available but is a visa-program provision, not a confirmed direct answer for Roth/Traditional IRA characterization specifically.
Recommended advisor: Philippines-specific cross-border tax specialist familiar with SRRV holders' filing patterns
Portugal
Roth IRA Settled
Not recognized as tax-free. Contributions exempt under Article 54; growth taxed as pension income at progressive rates (12.5-48% + up to 5% solidarity surtax).
Traditional IRA / 401(k) / Pension Settled
Taxed at standard progressive rates under Treaty Article 20(1)(a) once resident. Article 25 FTC prevents double taxation.
Social Security
US retains taxing rights as the paying state under Article 20.
Key consideration: NHR (flat 10% pension rate) closed to new applicants Jan 1, 2024. IFICI replacement excludes pension income entirely. Consider converting to Roth before establishing residency given no local Roth benefit either way.
Recommended advisor: Cross-border tax specialist familiar with post-NHR standard regime
Slovenia
Roth IRA Unclear
No country-specific source identified addressing Roth IRA treatment. Genuine research gap.
Traditional IRA / 401(k) / Pension Unclear
US tax treaty confirmed in force, but specific application to IRA/401k income not addressed in sources reviewed.
Social Security
Not specifically confirmed by any source reviewed.
Key consideration: Genuine research gap, similar to Croatia. Don't infer favorable treatment from Slovenia's low capital-gains-tax reputation — that's a separate question from retirement account characterization.
Recommended advisor: Slovenia-specific cross-border tax specialist or treaty-network specialist to review the pension article of the US-Slovenia treaty directly
Spain
Roth IRA Contested
Not recognized as tax-free. Contributions exempt; growth taxed as savings income (~19-30%), though some advisors argue full ordinary-income treatment (up to 45-47%) applies instead.
Traditional IRA / 401(k) / Pension Settled
Taxed as savings/general income once Spanish tax resident. Treaty FTC (Article 24) prevents true double taxation with the US.
Social Security
Addressed under treaty; saving clause preserves significant US taxing rights over its citizens regardless of residence.
Key consideration: Consider Roth conversion/liquidation timing relative to establishing 183-day tax residency, given the unresolved DGT position on Roth growth.
Recommended advisor: Cross-border tax specialist licensed in both US and Spain
Thailand
Roth IRA Unclear
Not directly addressed by any source reviewed. Tax only triggers on remittance, giving a distinct planning lever — avoid remitting Roth withdrawals into Thailand.
Traditional IRA / 401(k) / Pension Settled
US Treasury Technical Explanation explicitly lists 401k/Traditional IRA/SEP/SIMPLE as 'pensions' under Treaty Article 20(1) — taxable only by Thailand if resident AND remitted.
Social Security
Taxable only by the US under the treaty, regardless of remittance.
Key consideration: 2024 rule change (Por.161/2566) closed the old 'wait a year, remit tax-free' loophole — all income earned from 2024 onward is taxable whenever remitted. Managing what counts as a remittance (transfers, ATM withdrawals, card payments) matters more than account type.
Recommended advisor: Thailand-specific cross-border tax specialist current on post-2024 remittance rules