Retire in Canada or in the US? The Tax Comparison for Dual Citizens, Account by Account

The retirement-residence decision is the one place in cross-border planning where the taxpayer picks the tax system, and dual citizens routinely make it on climate and family and then discover the tax consequences — which is backwards only in the sense that the tax consequences are knowable in advance. The framework: under the treaty, most retirement income is taxed by the country of residence (with the source country's withholding as a creditable or final layer), so the residence choice reassigns the primary tax on nearly every account; a dual citizen files in both countries regardless (the US on citizenship, Canada on residence — or as a non-resident on Canadian-source income), so the comparison is about which country's rates apply to what, not about escaping either system. Account by account. Social Security: taxed only in the country of residence — in Canada, 85% included at Canadian rates; in the US, under the provisional-income rules (0%, 50%, or 85% included depending on other income) at US rates. CPP and OAS: CPP taxed only in the country of residence (Canada as ordinary income; the US under the Social Security provisional-income rules); OAS taxed in the country of residence, with the Canadian recovery tax (the clawback) applying to Canadian residents above the income threshold and a parallel non-resident computation applying to US residents through the OAS return — the clawback guide covers the non-resident's version. RRSPs and RRIFs: in Canada, withdrawals are ordinary income at Canadian rates; in the US, 15% Canadian withholding on periodic RRIF payments (final, with the section 217 election available to file for graduated rates) and US tax on the distributions at US rates with a credit for the Canadian withholding and basis recovery for non-deductible contributions — a US-resident retiree's RRIF is often taxed at a lower combined rate than a Canadian resident's, because 15% withholding plus US brackets is frequently below Canadian brackets. IRAs and 401(k)s: in the US, ordinary income at US rates; in Canada, US tax at graduated citizen rates (the dual citizen files a 1040, so the 15% nonresident rate doesn't apply — the US tax is the citizen's actual liability) and Canadian tax at Canadian rates with a credit — the Canadian bracket governs. Roth IRAs and TFSAs: the Roth is tax-free in both countries with the election (Canada) or by nature (US); the TFSA is tax-free in Canada and taxable annually in the US — a dual citizen resident in either country holding a TFSA is taxed on it by the US, so the TFSA is never free for a dual citizen and is usually avoided regardless of residence. Investment income: dividends, interest, and capital gains from a taxable portfolio are taxed by the country of residence at its rates (Canada — the capital gains inclusion rate, the dividend tax credit for Canadian eligible dividends; the US — preferential long-term gain and qualified dividend rates plus the net investment income tax), with the other country's withholding credited and the dual citizen's US return running in parallel with credits either way — the US's preferential rates on gains and qualified dividends versus Canada's higher rates on most investment income is the largest structural difference for retirees living off portfolios. Real estate: the principal residence exemption (Canada) versus the section 121 exclusion (US) on the home in the country of residence, and the non-resident rules on any property in the other (FIRPTA, section 116, rental withholding). Healthcare: provincial coverage in Canada (free at the point of use, funded through the higher taxes the comparison is measuring) versus Medicare in the US (Part B premiums, supplemental coverage, out-of-pocket exposure) — a cost that belongs in the after-tax comparison because it is the largest non-tax difference and partly explains the tax difference. Estate: Canada's deemed disposition at death (capital gains tax on accrued gains, no estate tax) versus US estate tax on worldwide assets above the exemption (with the dual citizen subject to it wherever resident, since citizenship drives it) and the basis step-up for heirs — for estates below the US exemption, Canada's deemed disposition is the only death tax and it favors dying a US resident with US-basis assets; for estates above it, the two regimes stack with treaty credits. Currency: the retiree's expenses are in the residence currency and their income is in both — the country of residence decides which stream needs converting for life. The profiles: retirees whose income is mostly Social Security and modest — the US often wins (provisional-income rules tax less of a small benefit than Canada's 85% inclusion) unless healthcare costs reverse it; retirees living off large RRSPs/RRIFs — the US frequently wins on the RRIF (15% withholding plus US rates versus Canadian brackets), less so once healthcare is priced; retirees living off large taxable portfolios — the US wins clearly on preferential rates; retirees with large IRAs — roughly neutral on the IRA itself (US rates either way for the citizen, with Canadian rates on top in Canada), tilting to the US; retirees with expensive health needs — Canada, often decisively, once premiums and out-of-pocket exposure are modeled; and retirees with large estates below the US exemption — the deemed disposition applies either way, and the location of the residence and the heirs decides. The decision, then, is a modeled after-tax, after-healthcare, after-currency comparison over a realistic horizon — with family and climate as the reasons people actually move, and the model as the thing that tells them what the move costs.

Key takeaways

• Residence reassigns the primary tax on nearly every account: the treaty taxes most retirement income where you live, with the source country's withholding creditable or final — the dual citizen files in both countries either way.
• Where the US usually wins: RRIFs (15% withholding plus US rates versus Canadian brackets), taxable portfolios (preferential gain and dividend rates), and modest Social Security (provisional-income rules versus 85% inclusion).
• Where Canada usually wins: healthcare (provincial coverage versus Medicare premiums and out-of-pocket exposure) — often decisive for retirees with real health costs — and the absence of estate tax for estates below the deemed-disposition-only threshold.
• Roughly neutral: IRAs and 401(k)s (the citizen pays US rates regardless; Canada adds its rates on top for a Canadian resident, credited); CPP and OAS (residence-country taxation with the clawback applying either way).
• Never free for a dual citizen: the TFSA — taxed by the US wherever the holder lives; the Roth is the tax-free account that travels.
• Model it, then decide on life: after-tax, after-healthcare, after-currency income over a realistic horizon, with the estate rules for the family's actual size — and then family and climate, which is what actually decides.

The residence comparison model

Inventory every income source and account with expected annual amounts. For each residence scenario, apply the treaty's assignment and the residence country's rules (inclusion rates, brackets, preferential rates, withholding and credits). Add healthcare (provincial coverage assumptions versus Medicare premiums, supplements, and modeled out-of-pocket). Add currency (which stream converts, at what assumed rate). Add the estate rules for the family's estate size. Compare the after-everything result over the horizon. The model takes a day with the account statements and, in our practice, surprises about a third of families — usually the ones who assumed the answer.

Worked example

A dual-citizen couple, both 64, deciding between Kelowna and Scottsdale: US$2,600 a month combined Social Security, C$1,900 a month combined CPP, OAS for both from 65, a C$1.1 million RRSP, a US$500,000 traditional IRA, a US$300,000 Roth, and a US$600,000 taxable portfolio. Kelowna: Social Security at 85% inclusion at BC rates; CPP and OAS as ordinary income with the clawback computed on their combined income (partially clawed back at their level); RRIF withdrawals at BC rates; IRA withdrawals at US citizen rates plus BC rates with credits (BC bracket governs); portfolio income at BC rates on dividends and the capital gains inclusion; Roth tax-free; provincial healthcare with no premiums. Scottsdale: Social Security under provisional-income rules at US rates (85% included at their income level — similar to Canada's inclusion, at lower US rates); CPP under the same US rules; OAS taxed in the US with the non-resident clawback computation on the OAS return; RRIF at 15% Canadian withholding (final, or section 217 modeled) plus US rates — materially below the Kelowna result; IRA at US rates only; portfolio income at preferential US rates — the largest single difference; Roth tax-free; Medicare Parts B and D, a supplement, and modeled out-of-pocket costs — about US$11,000 a year for the couple at their health profile. The model over twenty years: Scottsdale's after-tax income exceeds Kelowna's by roughly C$28,000 a year before healthcare and by roughly C$13,000 after it; the estate (below the US exemption either way) is taxed by Canada's deemed disposition regardless, with the US-basis step-up favoring Scottsdale modestly for their heirs. They choose Kelowna — the grandchildren are in Vancouver — and the model's value is that they chose it knowing the price, and structured the RRIF withdrawals and the portfolio's asset location to shrink it. The couple in the next chair, with a portfolio three times the size and no family on either side of the border, chose Scottsdale on the same model and a different life.

Official sources

"Pensions may also be taxed in the Contracting State in which they arise and according to the laws of that State; but if a resident of the other Contracting State is the beneficial owner of a periodic pension payment, the tax so charged shall not exceed 15 per cent of the gross amount of such payment." — Canada-United States Tax Convention, Article XVIII(2)(a), https://www.canada.ca/en/department-finance/programs/tax-policy/tax-treaties/country/united-states-america-convention-consolidated-1980-1983-1984-1995-1997-2007.html

"The Old Age Security Return of Income (OASRI) is used by the Canada Revenue Agency (CRA) to determine whether the OAS recovery tax should be deducted from your OAS pension"; a non-resident reports net world income to determine the recovery tax. — Canada Revenue Agency, Old Age Security Return of Income, https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/t4155/old-age-security-return-income-guide-non-residents.html

Practitioner note

The retirement-residence question is the one time a dual citizen picks their tax system, and the honest answer is account by account: the US wins on RRIFs and portfolios and modest Social Security, Canada wins on healthcare and sometimes on the estate, and the TFSA is free for nobody. Our comparison model runs both residences over the horizon with healthcare and currency priced in — it surprises a third of families — and then we step back, because family and climate decide the move and the model's job is to tell them what it costs.

See also: For the full tax picture when you retire to Canada from the US, see the full tax picture when you retire to Canada from the US; and browse every cross-border tax topic guide, organized by situation.

Next step

Fairlight prepares the retirement-residence comparison — account-by-account treaty assignment and residence-country modeling, healthcare and currency overlays, the estate-regime analysis for the family's size, and the asset-location and withdrawal structuring that shrinks the chosen residence's cost. See cross-border pricing or book a call.