Five Caribbean states sell citizenship for a cheque and a background check: Antigua and Barbuda, Dominica, Grenada, St Kitts and Nevis, and St Lucia. None of them require the buyer to move, live, or file taxes on the island. That is the pitch. It is also where the misunderstanding starts. A Caribbean passport is a travel document and, for some buyers, a treaty gateway. It is not, on its own, a tax plan — and the caribbean citizenship by investment tax position of the holder is decided by where the holder actually lives and, if applicable, whose citizenship they still hold.
This piece compares the five programmes on the numbers that matter in 2026 — entry price, processing time, family scope — and then walks through what the passport does and does not do for personal tax. It closes on the one structural feature that separates Grenada from the other four: the US E-2 investor treaty, and why that treaty (not the tax code) is often the real reason a specific applicant chooses one island over another. All figures should be verified with a licensed agent before applying; programme fees are re-priced regularly and each government publishes its own schedule.
The five programmes at a glance
All five are operated under national CBI legislation, all five involve either a non-refundable government fund contribution or an approved real-estate investment, and all five underwent minimum-price harmonisation following a 2024 memorandum with the United States Treasury that pushed the floor for a single applicant to roughly US$200,000. The table below reflects the position as of 2026; verify current fees with the relevant CBI unit or an authorised agent, as these are jurisdiction-dependent and re-set periodically.
| Programme | Cheapest route (single applicant) | Real-estate route (minimum) | Typical processing | Physical residence required? |
|---|---|---|---|---|
| Antigua and Barbuda | National Development Fund contribution | Approved project, ~US$300,000+ | ~4-6 months | 5 days in first 5 years |
| Dominica | Economic Diversification Fund contribution | Approved project, ~US$200,000+ | ~4-6 months | None |
| Grenada | National Transformation Fund contribution | Approved project, ~US$270,000+ | ~4-6 months | None |
| St Kitts and Nevis | Sustainable Island State Contribution | Approved project, ~US$325,000+ | ~4-6 months (accelerated option exists) | None |
| St Lucia | National Economic Fund contribution | Approved project or government bond | ~4-6 months | None |
Antigua is the only one of the five with a stated presence requirement, and it is trivial: five days across the first five years to renew the passport. The other four impose no physical presence at all, before or after grant. That is the feature most applicants pay for, and it is also the source of the biggest misconception about what the passport does for tax.
What a CBI passport does not do
A Caribbean passport, on its own, does not:
- Make the holder a tax resident of the issuing country.
- End tax residency in the country the holder currently lives in.
- Release a US citizen from filing US federal returns.
- Automatically satisfy a bank's tax-residency question under the Common Reporting Standard.
The first two are the most common trap. Tax residency in every one of the five CBI islands is based on physical presence and, in some cases, an economic-interest test — not on the passport in the applicant's pocket. Buying citizenship in Dominica while continuing to live 300 days a year in London leaves the holder a UK tax resident with UK worldwide-income exposure. See how tax residency works for the general mechanics; the CBI passport does not override any of it.
The third point matters for the largest single group of CBI applicants: US persons. The United States taxes on the basis of citizenship, not residence. Per the United States country profile, US citizens and green-card holders remain within the federal net on worldwide income regardless of where they live, with the Foreign Earned Income Exclusion capped at US$132,900 for 2026 and the estate-tax exemption sitting at US$15M per individual after the One Big Beautiful Bill Act. Adding a Grenadian or St Kitts passport changes none of that. The only route out of US tax exposure for a US citizen is formal expatriation under section 877A — a separate, taxable event that a second passport enables but does not accomplish.
Where the tax question does bite: banks and CRS
The Common Reporting Standard requires financial institutions to identify each account holder's tax residence(s) and report balances to the relevant tax authorities. All five CBI islands participate. In principle, CRS tax residency follows the physical-presence rules described above; in practice, banks routinely ask CBI clients to certify their tax residency, and a small but consistent number of institutions treat a CBI passport plus a local address of convenience as sufficient to record the island as the holder's residence. That is the bank's compliance shortcut, not a legal position, and it does not bind the holder's actual tax authority.
Two consequences follow. First, if the holder's genuine residence country later audits them, showing a CRS trail declaring Dominica or St Lucia as tax residence while living in Madrid can look like an attempt at concealment, even where none was intended. Second, if the holder is a US person, the CBI island's bank is still obliged to identify them as a US tax resident under FATCA, regardless of what CRS certification the passport allows. See CRS explained and the tax implications of a second passport for the underlying mechanics.
Domestic tax profile of the five islands
Assuming the holder does eventually establish real physical residence on one of the five islands, the personal-tax positions differ in ways that matter mainly for the small subset of buyers who will actually move.
Antigua and Barbuda
No personal income tax, no capital gains tax, no inheritance tax. Corporate income tax exists on locally-sourced business profits. Sales tax (ABST) at 15%. The absence of personal income tax is genuine, but it applies to individuals who live in Antigua — it does not travel with the passport.
Dominica
Progressive personal income tax on Dominica-source income, with a top rate in the mid-30s applied to residents on worldwide income. Dominica does levy tax on residents, which places it at the higher end of the five for holders who genuinely relocate. No capital gains tax on most personal investment gains. VAT at 15%.
Grenada
Personal income tax on locally-sourced income at 10% and 28% brackets; foreign-source income of resident individuals is generally outside the net, giving Grenada a broadly territorial character for personal income. No capital gains tax, no inheritance tax, no wealth tax. VAT at 15%.
St Kitts and Nevis
No personal income tax, no capital gains tax (subject to a short-hold anti-flip rule for real estate), no inheritance tax, no wealth tax. VAT at 17%. The cleanest headline personal-tax profile of the five, though again only relevant to holders who move.
St Lucia
Progressive personal income tax on residents, top marginal rate 30%, applied on a residence basis with foreign-source income of new residents generally exempt for a defined period. VAT at 12.5%. Sits between Dominica and the zero-tax islands.
The pattern is clear enough. For holders who never move, the domestic rate schedule is irrelevant. For holders who do move, St Kitts and Antigua offer no personal-income tax, Grenada offers a territorial-style treatment, and Dominica and St Lucia are ordinary residence-based systems. Territorial versus worldwide is a separate topic in its own right; this guide explains the trade-offs.
The Grenada exception: the US E-2 investor treaty
Of the five programmes, only Grenada is a party to a Bilateral Investment Treaty with the United States that qualifies its citizens for the US E-2 non-immigrant investor visa. Antigua, Dominica, St Kitts and St Lucia are not treaty countries for E-2 purposes as of 2026. This is the single feature that, for a specific category of applicant, decides the entire choice.
The E-2 visa allows the national of a treaty country to enter the United States to develop and direct a business in which they have invested a substantial amount of capital. It is renewable indefinitely so long as the qualifying investment continues. It is not a green card and it does not, in itself, create US tax residence — that is decided by the substantial-presence test regardless of visa category. But it is the fastest lawful route into the United States for a founder who cannot wait years for an EB-5 allocation and does not qualify for L-1 or O-1.
For a citizen of a country with no US E-2 treaty — India and China are the two large examples — a Grenadian CBI passport, followed by qualifying investment in a US business, is a well-established route to E-2 eligibility. Practitioners refer to this as the “Grenada route” and it explains why Grenada consistently prices at or near the top of the five programmes despite offering no additional visa-free travel of note over St Kitts or Dominica.
Two cautions apply. First, the applicant must genuinely acquire Grenadian citizenship — not merely hold a receipt — before E-2 filing, and US consular officers scrutinise CBI-based E-2 applicants closely. Second, the E-2 visa creates ties to the United States that themselves trigger tax exposure: an E-2 holder who spends enough days in the US will meet the substantial-presence test and become a US resident on worldwide income, at which point the tax profile of Grenada as a country of citizenship becomes irrelevant compared with the reality of US tax residency. This is where a CBI decision made for immigration reasons collides with the tax consequences the applicant did not expect.
Estate and succession considerations
Four of the five CBI islands impose no inheritance or estate tax. That is a genuine planning feature for holders who do relocate and re-domicile, because it can (subject to the holder's country of origin allowing loss of domicile) remove a layer of estate-tax exposure. It does not remove US federal estate tax for US citizens, which remains due on worldwide assets above the exemption regardless of where the citizen dies. See the United States profile for the current federal exemption and the state-level overlay.
Compliance friction the brochures do not mention
Three items reliably surprise CBI buyers in the year after grant:
- Ongoing bank onboarding. Every major international bank now asks CBI clients for source-of-wealth documentation that goes beyond what the CBI unit itself required. Holding a Caribbean passport does not shorten this process; in some cases it lengthens it.
- Renewal and recertification. Passports are typically issued for 5 or 10 years and renewal is not automatic; some programmes require updated due diligence at renewal.
- OECD and EU listing exposure. All five programmes have been the subject of periodic EU visa-suspension warnings and OECD peer-review commentary on tax-residence documentation. The mechanics do not currently threaten the passports themselves, but they influence which visa-free destinations remain available and which banks will onboard the holder.
Which programme, for whom
The compact answer, before any legal advice:
- Buyers who will not move and want the cheapest workable travel document: Dominica or Antigua, depending on family size.
- Buyers who plan to move and want zero personal income tax: St Kitts and Nevis, or Antigua and Barbuda.
- Buyers who want territorial-style treatment on foreign income if they relocate: Grenada.
- Buyers whose actual goal is US market access via E-2: Grenada is the only one of the five that qualifies. Verify current E-2 treaty status and the substantial-investment threshold with a US immigration attorney before committing.
- US citizens generally: understand before applying that no Caribbean CBI passport ends US federal filing obligations; only formal expatriation does. This overview covers what is and is not possible for US persons.
None of the above is legal or tax advice. Programme fees, processing rules and treaty terms change; verify with a licensed CBI agent and, separately, with a tax adviser qualified in the applicant's current country of residence.
Where to go next
For the tax mechanics that decide whether a passport actually reduces the holder's bill, start with how tax residency works and territorial vs worldwide taxation. For the US-specific overlay that catches most CBI applicants unaware, see the United States country profile and the tax implications of a second passport. To compare the CBI islands against low-tax residency alternatives that do not require citizenship, read Caribbean zero-tax islands residency, and use the country comparison tool to line the trade-offs up side by side. Programme-specific questions are collected in the TaxAtlas FAQ.