If you're American and planning to retire — or already retired — in Portugal, the question that keeps coming up is a simple one with an annoyingly complicated answer: what happens to my 401(k), my IRA, my pension, once I'm living here? The honest answer is that it depends on which account, which treaty article applies, and whether you're still a US person for tax purposes (spoiler: if you're a citizen, you always are). This guide walks through what actually happens, based on the current US-Portugal tax treaty and Portugal's 2026 tax rules — not the NHR-era promises that no longer apply to most new arrivals.
Start Here: Portugal Taxes Worldwide Income Once You're a Resident
Once you meet Portuguese tax residency — broadly, spending 183+ days a year in the country or having your habitual home here — Portugal taxes your worldwide income, including US-sourced retirement income. That's the default. Whether NHR-style relief softens that bill depends on when you applied and what kind of income you're receiving, which we'll get to below.
If you're weighing where retirement income taxation fits into your broader move, it's worth reading alongside our tax and NIF pillar and, if you haven't chosen a visa route yet, our visas guide — most retirees arrive on a D7 or, less commonly, structure things around residency timing to manage exposure.
What the US-Portugal Tax Treaty Actually Says
The 1994 US-Portugal income tax treaty divides taxing rights by income type, and pensions get split into two very different buckets.
Private Pensions, 401(k) and Traditional IRA Distributions
Under Article 18 of the US-Portugal treaty, private pension income paid to a Portuguese tax resident is generally treated as taxable in Portugal — this can include 401(k) distributions, IRA withdrawals, and annuities from private US pension plans. In plain terms: once you're Portuguese tax resident, your 401(k) and Traditional IRA withdrawals get taxed here, at Portuguese progressive rates, not preferentially.
Distributions from 401(k) plans and Traditional IRAs are taxable in your country of residence — Portugal — at progressive rates of 12.5% to 48%, plus solidarity surtax on higher amounts. Required Minimum Distributions don't disappear just because you moved — RMDs remain mandatory regardless of where you live, and those distributions are taxable income in Portugal.
Roth IRAs Get No Special Treatment
This surprises a lot of people. Portugal does not recognise the Roth IRA's tax-free status. Practically, Portugal does not mirror US tax-free treatment of growth — your original after-tax contributions are typically treated as non-taxable return of capital, while earnings and growth are generally taxable upon distribution, so keep meticulous contribution records to substantiate the non-taxable portion. Without good records going back years, proving what's contribution versus growth becomes a real headache at filing time.
US Social Security Works Differently
Social Security sits in a separate treaty article from private pensions, and the outcome flips: under the treaty, US Social Security benefits are taxable only in the United States — Portugal does not tax your Social Security. Some practitioners note the article also gives the US taxing rights while Portugal, as residence state, provides relief on any overlap — Social Security is different: benefits and other public pensions paid by one country may be taxed by the paying country, meaning US Social Security is taxable by the United States. Either way, the practical outcome for most retirees is the same: Social Security stays a US tax matter.
Government Pensions (Federal, Military) Follow Their Own Rule
US government pensions — federal civil service, military — are generally taxable only in the US under the treaty. If you retired from federal or military service, this is a meaningfully different (and often better) outcome than a private 401(k).
The Saving Clause: You Never Stop Being American to the IRS
This is the part people underestimate. For US citizens and green card holders, the treaty creates a particular complication: the saving clause, which allows the United States to tax its citizens and permanent residents as if the treaty did not exist. The treaty gives residents of one country reduced source-country withholding on certain cross-border income, but it does not erase US worldwide filing obligations for US citizens — the key planning point is that treaty benefits reduce some withholding, while the Foreign Tax Credit, FEIE, and treaty disclosures handle double taxation on the US return.
In short: you'll almost certainly still file a US return every year, using Form 1116 (Foreign Tax Credit) to offset the Portuguese tax you've paid on the same income, avoiding double taxation without avoiding the paperwork.
Where NHR and IFICI Fit — And Where They Don't
This is the single most important update for anyone who's been reading older blog posts. NHR closed to new applicants on 31 March 2025, and even before that, the pension exemption had already been narrowed. Under the old NHR, foreign pension income was taxed at a 10% flat rate (introduced in 2020) — prior to that, pensions were exempt, and the exemption removal was itself a major change.
IFICI — the "NHR 2.0" regime now in place — doesn't help retirees at all. IFICI offers full exemption on most foreign-sourced income like dividends, interest, capital gains, rental and royalties, but pension income is not covered and is taxed at standard progressive rates. Foreign pension income receives no special treatment under IFICI and is taxed at Portugal's standard progressive IRS rates. If you already hold NHR from before the cutoff, you keep your original terms for the rest of your 10-year window — check our tax and NIF pillar and the NHR/IFICI calculator to see where you land, but don't expect IFICI to shelter a 401(k) withdrawal the way old NHR once did.
Quick Comparison
| Income type | Who taxes it | Portugal rate (no NHR) | Double-tax relief |
|---|---|---|---|
| 401(k) / Traditional IRA distributions | Portugal (residence) | Progressive, up to 48% + surtax | US Foreign Tax Credit (Form 1116) |
| Roth IRA distributions | Portugal, on growth only | Progressive on earnings portion | FTC on any Portuguese tax paid |
| US Social Security | United States | Not taxed by Portugal | N/A — taxed once, in the US |
| US federal/military pension | United States | Not taxed by Portugal | N/A — taxed once, in the US |
| Private employer pension | Portugal (residence) | Progressive, up to 48% + surtax | US Foreign Tax Credit |
Figures are indicative — verify your specific bracket and any solidarity surtax with a Portuguese tax adviser or the Autoridade Tributária before filing.
How and Where You Report This in Portugal
Foreign pension and retirement account income is declared on the annual Modelo 3 IRS return, filed through the Portal das Finanças between 1 April and 30 June for the previous tax year. You'll need to have registered as a tax resident and hold a valid NIF before any of this is possible — if you haven't sorted that yet, our company setup and NIF-adjacent services can walk through registration and first-year filing obligations with you before deadlines sneak up.
Common Mistakes We See
- Assuming Portugal treats Roth IRAs like the IRS does. It doesn't — growth is taxable on distribution, and without contribution records you may end up taxed on the whole withdrawal.
- Forgetting the US filing obligation continues forever. The saving clause means citizenship, not residency, drives your US tax duty.
- Confusing government and private pensions. Federal/military pensions and Social Security stay with the US; 401(k)s, IRAs and most private pensions shift to Portugal once you're resident.
- Timing the move badly. Large one-off distributions (Roth conversions, lump-sum 401(k) cash-outs) taken in the same year you become Portuguese tax resident can land at higher progressive rates than expected — this is worth modelling before, not after, the move.
Frequently Asked Questions
Yes, once you're a Portuguese tax resident. Under the treaty, 401(k) and Traditional IRA distributions are taxable in your country of residence — Portugal — at progressive rates of 12.5% to 48%, plus solidarity surtax on higher amounts. The US Foreign Tax Credit is generally used to prevent double taxation on the same distribution.
Generally no. Under the treaty, US Social Security benefits are taxable only in the United States — Portugal does not tax your Social Security. You'll still need to declare it for context on your Portuguese return, but it shouldn't generate Portuguese tax itself.
Not anymore for new arrivals. NHR closed to new applications on 31 March 2025, and pension income is not covered by IFICI and is taxed at standard progressive rates. If you hold legacy NHR from before the cutoff, your original terms — including the 10% pension rate where it applied — continue for your remaining years.
Yes, always, for as long as you're a US citizen or green card holder. The Saving Clause in Protocol paragraph 1(b) preserves full US filing obligations regardless of treaty benefits. Moving abroad changes where you owe tax, not whether you file.
No. Portugal does not recognise the Roth IRA's tax-free status. Your original contributions are usually treated as tax-free return of capital, but investment growth is generally taxable when withdrawn, so hold onto your contribution history.
This is genuinely one of the areas where getting professional cross-border advice pays for itself — a Portuguese accountant working alongside your US preparer, using Form 1116 correctly, can be the difference between an efficient filing and an accidental double tax bill. Outcomes always depend on your specific accounts, residency dates and the Autoridade Tributária's assessment, so treat this as a starting map, not a final answer. For the bigger picture on residency and day-to-day life once you've made the move, see our living in Portugal and relocation guides.
Sorting out how your US pension, 401(k) or IRA will actually be taxed here — before you move, not after — is exactly what our tax consultation service is for. Get a clear, personalised read on your situation and file with confidence.