Financial Planning in Sint Maarten: Tax, Investment and Residency Guide for HNW Individuals

Introduction

Sint Maarten is the southern, Dutch-administered half of the island of Saint Martin (Saint-Martin/Sint Maarten) in the north-eastern Caribbean — the world's smallest landmass shared between two sovereign entities. The French half (Saint-Martin) is a French collectivity within the French Republic; the Dutch half (Sint Maarten) is a constituent country of the Kingdom of the Netherlands.

Sint Maarten shares structural similarities with Aruba and Curaçao: it is part of the Dutch Kingdom, benefits from Dutch legal traditions, and operates its own tax system separate from the Netherlands proper. However, Sint Maarten has a significantly smaller economy and population (approximately 43,000 residents), and its recovery from Hurricane Irma in 2017 — which caused devastating damage across much of the island — has been protracted.

For HNW individuals, Sint Maarten is a planning jurisdiction that offers: no capital gains tax for private investors, no inheritance tax, a top income tax rate of 47.5% (significantly below metropolitan Netherlands' top rate of 49.5%, and with important practical differences), a USD-denominated economy, and the lifestyle advantages of a tropical Caribbean island with Dutch governance quality.

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The Kingdom of the Netherlands Structure

Sint Maarten, like Aruba and Curaçao, is a constituent country of the Kingdom of the Netherlands. Dutch income tax does not apply — Sint Maarten residents pay tax under the National Ordinance Income Tax 1943 as amended (Landsverordening op de Inkomstenbelasting 1943), levied by the Sint Maarten tax authority (Belastingdienst Sint Maarten).

This is an important distinction that is sometimes misunderstood. Sint Maarten is not a tax haven in the conventional sense — it has its own progressive income tax — but it is materially different from the Netherlands, and the Netherlands' punitive income tax rates and box 3 deemed-return investment income taxation do not apply.

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Income Tax Rates

Sint Maarten's income tax is progressive, with rates approaching 47.5% at the top bracket. However, several important points contextualise this:

1. The top rate of 47.5% is reached at income levels significantly above the average, and applies to the highest slice of income only.
2. Social premiums (volksverzekeringspremies) in Sint Maarten are lower than in the Netherlands and are capped.
3. There are specific deductions and allowances available under Sint Maarten domestic law.
4. The absence of capital gains tax and inheritance tax means that the total lifetime tax burden on investment wealth is materially lower than the headline income tax rate suggests.

Residents of Sint Maarten are taxed on worldwide income. Non-residents face tax on Sint Maarten-source income only.

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Capital Gains: Not Taxed

Sint Maarten does not levy capital gains tax on the disposal of shares, bonds, or investment assets by private individuals. Unlike the Netherlands, where the box 3 system applies a deemed return on savings and investments (regardless of actual returns), Sint Maarten does not apply an equivalent charge.

Gains on the disposal of real property held as a private asset are also generally exempt from a specific CGT charge, though local advice is essential for property transactions involving development or business activities.

This CGT exemption is particularly significant for individuals who have accumulated substantial unrealised gains in equity or real estate portfolios, and who are considering an exit strategy ahead of disposal.

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Inheritance and Gift Tax

Sint Maarten does not levy inheritance tax or estate duty. Assets passing on death are not subject to succession duties at the Sint Maarten level. There is also no gift tax.

This reflects the Dutch Caribbean approach to succession more generally — Curaçao, Aruba, and Sint Maarten all lack inheritance tax — and distinguishes the Dutch Caribbean from most European jurisdictions, where succession duties can represent a significant erosion of generational wealth.

For internationally mobile individuals who establish a genuine Sint Maarten base, this absence of inheritance tax can be a compelling planning point. UK-connected individuals must assess their position under the UK's residence-based IHT regime (which since 6 April 2025 replaced the old domicile and "deemed domicile" tests, bringing long-term UK residents within IHT on worldwide assets) and the four-year Foreign Income and Gains regime for new UK arrivers.

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The US Dollar Economy

Sint Maarten does not have its own currency. The US dollar is the de facto currency of the island — used for all commercial transactions, property pricing, and day-to-day payments. The official currency is the Netherlands Antillean guilder (ANG) shared with Curaçao, pegged at ANG 1.79 per USD, but in practice, USD cash and USD bank accounts are the standard.

This dollar-based economy eliminates currency risk for USD-denominated investors and creates natural alignment with US and Caribbean investment markets. Euro-based investors face only the EUR/USD exchange rate risk, not a local currency risk.

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Real Estate and the Post-Irma Recovery

Hurricane Irma struck Sint Maarten in September 2017 with Category 5 winds, causing catastrophic damage to approximately 90% of structures. The recovery has been substantial but uneven: the tourism-dependent economy has rebuilt significant hotel and commercial inventory, but residential property in some areas remains partially reconstructed, and construction costs are high due to the island's import dependency.

For property investors, this recovery context creates both opportunity and risk. Properties in prime locations — particularly ocean-view homes in desirable areas — have seen significant appreciation as reconstruction has proceeded. The return of cruise ship traffic and stay-over tourism has supported commercial and hospitality property values.

Foreign nationals may purchase real estate in Sint Maarten. Transfer taxes (overdrachtsbelasting) apply at 4% for most transactions. Annual property tax (onroerendezaakbelasting) is levied on owners.

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Banking and Financial Services

Sint Maarten's banking sector is supervised by the Central Bank of Curaçao and Sint Maarten (CBCS), shared with Curaçao. Major banks operating on the island include RBC Royal Bank (Sint Maarten) and Windward Islands Bank (WIB). The banking infrastructure is functional for the island's size but more limited than Curaçao's.

International wire transfers are possible but may require enhanced AML documentation for non-standard transactions.

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Practical Residency

Sint Maarten is part of the Kingdom of the Netherlands for nationality and immigration purposes but is outside the EU. EU nationals do not have automatic right of residence in Sint Maarten (unlike in the EU). Non-EU nationals — including UK post-Brexit — require a residence permit for long-term stays.

The island is cosmopolitan, with a population that is majority non-Dutch by origin (reflecting decades of Caribbean migration and international settlement). English is the primary working language despite Dutch official status. The French half of the island (Saint-Martin) provides access to French education and healthcare systems for residents of the island as a whole.

Airport connectivity includes direct flights to Amsterdam, Miami, and numerous Caribbean destinations via Princess Juliana International Airport (undergoing reconstruction following Irma damage).

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Tax Information Exchange

Sint Maarten participates in CRS and exchanges financial account information with participating jurisdictions, including the UK. FATCA applies for US persons. Individuals planning Sint Maarten residency should not assume financial account information will remain private from prior jurisdictions.

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Compliance Caveats

Sint Maarten's tax legislation is subject to change by the Sint Maarten parliament (Staten), and the rates and rules in this guide reflect available information as of 2026. The interaction between Sint Maarten's domestic rules, Kingdom-level arrangements, and prior-jurisdiction obligations is complex. Nothing here constitutes legal or tax advice. Property values and the pace of post-hurricane recovery can diverge from expectations; investments can fall as well as rise. Independent advice from a qualified Sint Maarten tax adviser (accredited by the Sint Maarten tax authority) and from your UK or prior-jurisdiction adviser is essential before any decisions.

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How Global Investments Can Help

Global Investments has over 32 years of experience advising internationally mobile HNW individuals on Caribbean and Dutch Caribbean planning jurisdictions, including Sint Maarten. We can assess whether Sint Maarten residency — including its CGT and inheritance tax advantages — creates a genuine planning benefit relative to your current position, structure any property investment with appropriate regard for local taxes and recovery-market dynamics, and manage your broader wealth plan across multiple jurisdictions. Our advice is independent and fee-based. Contact our international planning team for a confidential discussion.