Overview
Panama is the simplest country on this list, and it's simple for a structural reason: Panama runs a pure territorial tax system. It taxes only income earned inside Panama. Nearly everything an American retiree lives on — Social Security, pensions, Traditional or Roth IRA distributions, 401(k) withdrawals, US investment income — is foreign-source income, and foreign-source income is entirely outside Panama's tax net, full stop.
Roth IRA Treatment — Settled
Roth IRA distributions are not taxed by Panama at all, regardless of amount, because they're foreign-source income under Panama's territorial system. This is consistent across every source reviewed and isn't a matter of interpretation — Panama simply doesn't look at foreign-source income of any kind.
Traditional IRA / 401(k) / Pension Treatment — Settled
Same answer: not taxed by Panama. A retiree with $40,000 in Social Security plus $20,000 in 401(k) withdrawals pays zero Panamanian tax on either, because both are foreign-source.
Social Security Treatment — Settled
Not taxed by Panama, for the same territorial-system reason.
The Important Catch: No US-Panama Tax Treaty
Panama's simplicity on the local side comes with a real gap on the US side: there is no US-Panama income tax treaty. This doesn't create double taxation in practice (since Panama isn't taxing this income anyway, there's nothing to credit against), but it does mean there's no treaty tie-breaker mechanism, no treaty-based residency test, and no formal double-taxation relief structure if a dispute ever arose. Americans in Panama rely on the standard US Foreign Tax Credit and Foreign Earned Income Exclusion mechanisms, not treaty-specific provisions. The FEIE, notably, only shelters earned income — it doesn't apply to Social Security, pensions, or retirement account withdrawals, which is most of what retirees actually live on.
Wealth Tax Exposure — Settled
Panama has no wealth tax.
Key Planning Consideration
Because Panama doesn't tax any of this income, there's no country-specific Roth-versus-Traditional planning question the way there is in Spain or Portugal — your account type only matters for US tax purposes. This makes Panama one of the cleanest destinations on this list for anyone whose main tax-planning concern is complexity avoidance rather than local rate minimization (Panama can't lower a tax that doesn't exist).
Recommended Advisor Type
A US-side CPA or enrolled agent experienced with expat filings is generally sufficient here — the complexity in a Panama retirement is almost entirely on the US filing side (FBAR, Form 8938, standard 1040 reporting), not the Panamanian side.
Sources
- Greenback Tax Services — Retiring in Panama Tax Guide for US Citizens: Pensionado Visa
- CountryTaxCalc — Panama Tax Guide Hub 2026
- Taxes for Expats — Retiring in Panama: A guide for US citizens
- MyExpatTaxes — Retiring in Panama: A Guide for US Expats
This is general education, not personalized advice. Even in a low-complexity destination like Panama, confirm your specific filing obligations with a US expat tax professional.