Costa Rica, Belize, and Panama have no income tax treaty with the US or Canada. The Dominican Republic has one with Canada, in force since 1977, and none with the US.[IRS, United States Income Tax Treaties A to Z, 2026-07] For most personal-use buyers this costs less than it sounds: both the US and Canada grant foreign tax credits with no treaty required, and three of the four countries run territorial systems that leave foreign income alone. Read closely if you are at dual-residence risk, hold property through a corporation, or are a self-employed American working in-country.
Who has a treaty and who does not
The four markets line up like this:
| Country | US income tax treaty | Canada income tax treaty | Information exchange | Local tax base |
|---|---|---|---|---|
| Costa Rica | None | None; TIEA in force since 2012 | US TIEA (1989), Canada TIEA, FATCA, CRS | Territorial |
| Panama | None | None; TIEA in force since 2013 | US TIEA (2010), Canada TIEA, FATCA, CRS | Territorial |
| Belize | None | None; TIEA talks opened 2010, never concluded | FATCA; TIEAs with other countries only | Belize-source income |
| Dominican Republic | None | Yes, in force since 1977 | Treaty exchange article, FATCA | Territorial, plus foreign investment income after three years of residence |
The US side is easy to verify: the IRS treaty list runs from Armenia to Venezuela and includes none of the four. What the US has instead are tax information exchange agreements, signed with Costa Rica in 1989 and Panama in 2010.[US Department of the Treasury, Tax Information Exchange Agreements, 2026-07]
The Canadian side carries a trap: Panama is routinely mislisted as a Canadian treaty partner. What Canada and Panama signed is a tax information exchange agreement, in force since December 6, 2013, not a double-tax convention.[Government of Canada Publications, Agreement between Canada and the Republic of Panama for Tax Cooperation and the Exchange of Information relating to Taxes, entry into force 6 December 2013, 2026-07] Panama’s own network of full double-tax treaties, in force with more than 15 countries, covers Mexico, Spain, the UK, and others; Canada and the US are not on it.[PwC Worldwide Tax Summaries, Panama, Corporate Withholding Taxes (treaty table), 2026-07] Canada’s information exchange agreement with Costa Rica entered into force on August 14, 2012.[Department of Finance Canada, Entry Into Force of the Tax Information Exchange Agreement Between Canada and Costa Rica, 2026-07] Belize has neither with Canada; the negotiation opened in June 2010 still sits on the Department of Finance’s under-negotiation list.[Department of Finance Canada, Tax Information Exchange Agreements Under Negotiation, 2026-07] Belize’s own regulator lists TIEAs with Switzerland, the Czech Republic, South Africa, India, and Poland only.[Financial Services Commission of Belize, Tax Information Exchange Agreements, 2026-07]
The Dominican Republic is the outlier. Its convention with Canada, signed August 6, 1976, still does real work for Canadian owners: withholding caps of 18 percent on dividends, interest, and royalties, a residence tie-breaker in Article IV, and a mutual agreement procedure in Article XXV.[Convention Between Canada and the Dominican Republic for the Avoidance of Double Taxation, Articles IV, X-XII, XXV, 2026-07] Americans get none of that; treaty benefits run to residents of the two contracting states.
What a treaty does that a credit cannot
A full double-tax treaty does four jobs, each covered in the how tax treaties work explainer: it breaks ties when both countries claim you as a tax resident, caps what the source country can withhold on dividends, interest, and royalties, opens a mutual agreement procedure when the two tax authorities collide on your file, and allocates taxing rights by income type so each side knows in advance who taxes what.
None of the four exists between the US and any of these countries, or between Canada and Costa Rica, Panama, or Belize. The Canada-DR convention is the group’s only live example, which is why the 1976 document still matters to Canadian buyers in Las Terrenas and Punta Cana.
The unilateral credit works without a treaty
This is what keeps a no-treaty purchase viable. The US foreign tax credit does not depend on a treaty: income taxes paid to any foreign country are creditable against US tax on the same income, claimed on Form 1116 under the rules in Publication 514.[IRS Publication 514, Foreign Tax Credit for Individuals, 2026-07] An American paying Costa Rican tax on Guanacaste rental income credits it against the US liability, treaty or no treaty. The US foreign tax credit page covers the limitation math and the passive-category basket.
Canada mirrors this through section 126 of the Income Tax Act, which credits foreign income taxes with no treaty required; CRA’s folio on foreign tax credits governs the mechanics.[CRA, Income Tax Folio S5-F2-C1, Foreign Tax Credit, 2026-07] A Canadian reporting Dominican rental income files under the worldwide-income rules in CRA’s foreign rental income treatment and credits the Dominican tax paid.
So the headline fear, paying full tax twice on the same rental income, mostly does not happen. Treaties add precision at the edges, and the edges are where no-treaty buyers get cut.
Where no treaty bites
Dual residence has no referee
Costa Rica treats you as a tax resident once you spend more than 183 days there in the fiscal year.[PwC Worldwide Tax Summaries, Costa Rica, Individual Residence, 2026-07] A Canadian who crosses that line while keeping a home, a spouse, or economic ties in Canada is a resident of both countries under domestic law, and there is no Article IV to break the tie. Against a treaty country, the tie-breaker can make that Canadian a deemed non-resident the moment it assigns residence abroad. Against Costa Rica, Panama, or Belize, whether you have left Canada is fought entirely on the facts, under the residential-ties framework in CRA’s residence folio.[CRA, Income Tax Folio S5-F1-C1, Determining an Individual's Residence Status, 2026-07] Keep the house in Oakville and CRA keeps you, whatever your Costa Rican day count says.
For US citizens the tie-breaker was never available anyway. Citizenship-based taxation follows the passport, so an American is a US taxpayer in Boquete, in Placencia, or on the moon. The treaty gap changes little for them on residence; it bites elsewhere.
Withholding has no ceiling
Treaty rate caps are the second casualty. In a no-treaty pairing, the source country’s full statutory withholding applies to income flowing out to a non-resident owner, whatever it is, and whatever it is raised to later.
The Canadian side has a sharper version of this problem. Foreign tax on portfolio income, interest and dividends rather than rent, is fully creditable only up to 15 percent; subsection 20(11) of the Income Tax Act demotes anything above that line to a deduction.[Income Tax Act, subsection 20(11), 2026-07] Treaty caps normally hold withholding at or under 15 percent, which is what makes the credit whole; with no cap, the excess comes back only as a deduction, a permanently worse outcome. Rental income from real property sits outside the 15 percent limit, one reason straightforward property ownership survives the no-treaty environment better than cross-border investment portfolios do.
Disputes have no procedure
When two tax authorities take inconsistent positions on the same income, a treaty’s mutual agreement procedure forces them to talk. Without one, each authority applies its own law, you claim your credit, and if the credit does not fully unwind the overlap, the leftover double tax is simply yours. That is rare for a single rental property. It stops being rare when a sale, an audit, or a corporate structure puts a contested characterization on the table.
The Canadian corporate wrinkle
Canadians holding foreign property through a corporation should know the term designated treaty country. A foreign affiliate’s active business earnings build exempt surplus, distributable to a Canadian corporate parent tax-free, only when the affiliate is resident in one, and the regulation extends that status to jurisdictions with a TIEA in force.[Income Tax Regulations, subsection 5907(11), designated treaty country definition, 2026-07] This is where the unglamorous TIEAs earn their keep: Costa Rica and Panama qualify through theirs. Belize, with neither treaty nor TIEA, does not, so a Belizean company’s active earnings accumulate in taxable surplus instead. Most single-property rental companies earn passive income that lands in FAPI, foreign accrual property income taxed in Canada as it accrues, regardless of surplus accounts; the full structure analysis lives in holding foreign property through a corporation.
Social security runs on its own track
Totalization agreements are separate instruments from income tax treaties, and the US list, about 30 countries, includes none of the four.[Social Security Administration, US International Social Security Agreements, 2026-07] The hit lands on self-employed Americans: US self-employment tax applies alongside any local social contributions, with no agreement to assign coverage to one system, so an American running a remote business from Costa Rica pays both stacks. Retirees drawing US Social Security or CPP are largely unaffected.
Territorial systems absorb most of the damage
The no-treaty gap stays survivable because Costa Rica, Panama, and Belize tax on a territorial basis: income earned outside the country is outside the tax net.[PwC Worldwide Tax Summaries, Panama, Individual Taxes on Personal Income, 2026-07] Your US pension, Canadian dividends, and home-country salary do not acquire a Costa Rican or Panamanian tax liability just because you live there. The classic double-tax collision never forms because the host country does not claim the worldwide half. What remains is source-country tax on local rental income and gains, plus home-country tax on the same, and the unilateral credit handles that overlap.
Belize taxes only Belize-source income, and its Qualified Retired Persons program exempts members’ foreign income outright.[Belize Tourism Board, Qualified Retirement Program (Retired Persons Incentives Act), 2026-07] The Dominican Republic is territorial for most income but pulls residents’ foreign investment income into the net after three years of residence.[PwC Worldwide Tax Summaries, Dominican Republic, Individual Taxes on Personal Income, 2026-07] That is the kind of edge where Canadians are glad the 1976 treaty exists and Americans discover they are on their own.
A treaty matters most between two worldwide-taxation countries. Against a territorial system, its absence is blunted because the collision it would referee mostly never gets scheduled.
A TIEA is not a tax treaty
The phrase “tax agreement” does a lot of damage in this niche. A tax information exchange agreement moves data between tax authorities on request, and that is the whole instrument; none of a treaty’s four functions comes with it. Its two real effects on a buyer: your host-country financial footprint is visible to the CRA or IRS, and, for Canadian corporate structures, TIEA partners count as designated treaty countries for exempt surplus.
No treaty does not mean no visibility. All four countries have signed FATCA intergovernmental agreements with the US, and account information moves multilaterally through the OECD’s common reporting framework.[US Department of the Treasury, Foreign Account Tax Compliance Act, IGA resource center, 2026-07] Anyone reading “no tax treaty” as “the IRS cannot see my Panamanian account” is a decade out of date and accumulating penalty exposure, not privacy.
Who should care and who should not
Skip the worry if you are buying a personal-use home or a single rental with retirement income from home. Territorial host taxation plus the unilateral credit covers your file, and your real work is the home-side reporting: T1135 and rental filings for Canadians, FBAR and Form 8938 thresholds for Americans, all covered in the country tax pages.
Pay attention if you plan to spend more than half the year in-country while keeping home-country ties: dual residence has no tie-breaker in three of the four markets. Same if you hold, or plan to hold, through a corporation, since treaty status decides how profits repatriate and Belize sits on the wrong side of that line. Self-employed Americans working from the country pay the doubled contribution stack. And if your wealth is mostly portfolio income you intend to shift into local instruments, uncapped withholding above 15 percent turns Canadian credits into deductions.
FAQ
Does buying in a no-treaty country mean I get taxed twice?
Usually not. The US and Canadian foreign tax credits work unilaterally, and Costa Rica, Panama, and Belize do not tax foreign income in the first place. Double tax without relief arises at the edges: contested residence, uncapped portfolio withholding, and disputes with no procedure.
Is a TIEA the same as a tax treaty?
No. A TIEA exchanges information between tax authorities, nothing else: no rate caps, no tie-breaker, no double-tax relief. Its one buyer-relevant upside is Canadian: TIEA partners count as designated treaty countries for exempt-surplus purposes.
Does Panama have a tax treaty with Canada?
No, and this is the most commonly repeated error about the group. Canada and Panama signed an information exchange agreement in force since 2013. Panama’s full double-tax treaties cover more than 15 countries; Canada and the US are not among them.
Does the Canada-DR treaty help American buyers in the Dominican Republic?
No. Treaty benefits belong to residents of Canada and the Dominican Republic. An American owner in Punta Cana faces DR statutory rates and relies on the unilateral US foreign tax credit.
Which of the four is weakest on treaty infrastructure?
Belize: no income tax treaty and no TIEA with either the US or Canada, which also locks Canadian corporate structures out of exempt surplus. Its territorial base and QRP exemption soften the day-to-day effect for individual owners.
Where this fits in the library
This page owns the treaty layer; the numbers live elsewhere. Start at the tax library hub for the relief system as a whole, and how tax treaties work for the mechanics this page assumes. Country-level rates and filing detail sit in the buyer tax pages: Costa Rica for Canadian buyers, Panama for American buyers, and the Dominican Republic for Canadian buyers, with parallel pages for the other passport in each market. Two questions to settle before you rely on any of it: will your day count put you at dual-residence risk in a market with no tie-breaker, and does your holding structure depend on treaty status your target country does not have?