Tax in Saint Martin (French part)

Who is the tax authority?

The Bureau des Contributions et Impôts (BCI), operating under the Collectivité de Saint-Martin, administers personal and corporate income tax for residents who have passed the 5-year threshold. It is distinct from France's DGFiP, reflecting the fiscal autonomy granted by the 2007 organic law.

For residents in their first 5 years, the DGFiP remains the relevant authority — French metropolitan rules apply in full during that transition window. After year 5, the BCI takes over, applying the locally simplified rate schedule.

VAT is not administered here — there is no TVA equivalent in Saint Martin. Customs-related duties (Octroi de Mer and local consumption taxes) fall under a separate territorial administration.

What is the tax year and when are returns due?

The tax year is the calendar year (1 January to 31 December). Filing deadlines follow the French model — returns for the prior year are due in the first half of the following year, with the BCI issuing specific dates for established residents.

The BCI sets its own deadlines for established residents. Residents in years 1–5 file with DGFiP under the same staggered département schedule used across metropolitan France and its overseas territories.

Who counts as a Saint Martin tax resident?

Residency in Saint Martin works in two phases. During the first 5 years, standard French tax-residency tests apply — ordinary residence, principal professional activity, or centre of economic interests (Article 4 B CGI). These residents are taxed under metropolitan French rules, not local BCI rules.

After 5 full years of continuous residence, the local framework activates. The BCI treats the individual as an established Saint Martin resident and applies the local PIT schedule. The 5-year rule is an anti-tax-flight provision — it prevents people from moving solely to access the lower local rates.

Residents pay tax on worldwide income under either framework. Non-residents pay only on Saint Martin-source income. Dual-residency questions (especially for those working across the SX border on the Dutch side) require careful analysis under the French–Netherlands treaty and the island's unique geography.

What are the personal income tax rates?

After the 5-year residency threshold, Saint Martin's BCI applies a locally simplified progressive schedule. The rate bands are broader and lower than France's metropolitan schedule:

During years 1–5, the French metropolitan scale applies: 0 / 11 / 30 / 41 / 45 percent plus the 17.2% social levies (CSG/CRDS/prélèvement de solidarité). That full French rate stack applies regardless of where on the island you live.

The social-levy stack (CSG/CRDS 17.2%) continues to apply on employment income for both residents in years 1–5 and established residents, as CSG/CRDS is administered by France and not subject to the fiscal-autonomy carve-out.

How does corporate tax work?

Saint Martin's BCI administers corporate income tax for businesses established on the French side. The standard rate is approximately 20% on net taxable profit — lower than France's 25% metropolitan rate, reflecting the COM's investment-incentive posture.

The Defiscalisation Outre-Mer (sometimes called Girardin) framework allows investors in metropolitan France to fund qualifying investment projects in COMs and receive a tax credit against their metropolitan income tax. For businesses located in Saint Martin, this means access to subsidised capital from metropolitan investors seeking French-law tax relief. The mechanism is administered through approved intermediary funds.

Post-Hurricane Irma (2017) reconstruction incentives extended and expanded eligibility windows for several years. Hospitality, residential construction, and infrastructure projects all benefited.

What replaces VAT in Saint Martin?

Saint Martin has no VAT. This is one of its most distinctive features post-2007. Instead, indirect revenue comes from two mechanisms:

The Octroi de Mer is a sea-tax on goods entering Saint Martin's territory. It has existed in various forms since colonial-era French Caribbean administration and was preserved post-2007 as the primary revenue instrument. Most imported consumer goods fall in the 4–8% band; alcohol, tobacco, and certain luxury goods attract the 12% upper band.

This absence of VAT is a clear divergence from metropolitan France (20% TVA) and from the Netherlands (21% BTW on the SX side next door). Cross-border shoppers notice the price differences immediately when crossing between MF and SX.

Currency framework

The divided island — 1648 Treaty of Concordia

Residents, workers, and business owners regularly cross between MF and SX. Someone living on the French side but working on the Dutch side faces potential dual-obligation questions. The French-Netherlands income-tax convention governs the framework, but its application to the post-2007 autonomous COM is not always straightforward — pre-2007 treaties were negotiated when Saint Martin was still part of Guadeloupe.

How are cryptoassets treated?

Saint Martin does not have a dedicated crypto-asset tax law at the territorial level. Residents in their first 5 years fall under French regulatory treatment — AMF and ACPR apply, and gains on occasional disposals are subject to the 30% PFU (12.8% income tax plus 17.2% social levies) under Article 150 VH bis CGI.

For established residents (year 6+), the BCI framework is thin on crypto specifics. Gains are broadly treated as income under the local schedule. Given the French AMF's passporting reach and the COM's status as an EU outermost region, AMF jurisdiction extends to crypto-asset service providers operating in Saint Martin.

The practical note: many residents on the island hold USD or crypto given the tourist-economy base and proximity to Sint Maarten's dollar-denominated environment. Careful characterisation is important.

What is the treaty network?

Saint Martin's treaty coverage derives from France's extensive bilateral DTA network (~125 treaties). However, since Saint Martin was not a separate jurisdiction before 2007, most treaties were written to cover metropolitan France and its DOMs — the COM status introduces interpretive questions about which treaty provisions extend to locally-administered income.

Income subject to French DGFiP jurisdiction (years 1–5 residents, non-residents on French-source income) benefits from the full French treaty network. Income subject to the BCI's local authority is in a more uncertain position depending on the specific treaty and its territorial scope.

France ratified the OECD Multilateral Instrument (MLI) — its provisions apply to French treaties from 2019 onward. The COM status of Saint Martin does not automatically exclude MLI applicability to DGFiP-administered residents.

Where does Saint Martin sit in the French Caribbean territory cohort?

Saint Martin anchors the French Caribbean COM cohort — the group of French overseas territories with degrees of fiscal autonomy distinct from metropolitan France.

Meet a Saint Martin-resident taxpayer

Hurricane Irma 2017 — fiscal context

The reconstruction context has largely wound down, but some extended depreciation periods run to 2027. Investors and business owners with hurricane-era Girardin obligations benefit from a qualified local accountant who understands the interplay between BCI and DGFiP treatment of those assets.

Common pitfalls and traps

Several recurring situations catch residents and business owners off guard:

Decision flow — which framework applies?

When should you talk to a Saint Martin tax pro?

Some situations in Saint Martin are more complex than either metropolitan France or a typical Caribbean jurisdiction:

• You are approaching year 5 of residence and want to understand the transition from DGFiP to BCI jurisdiction
• You earn income on both the French (MF) and Dutch (SX) sides of the island
• You hold a Girardin (Defiscalisation Outre-Mer) investment and need to verify compliance-period status
• You incorporated a company in Saint Martin and have shareholders subject to different tax frameworks
• You received a DGFiP or BCI assessment, audit letter, or back-tax query
• You are considering relocating from metropolitan France and want to model the 5-year transition cost
• You hold non-French accounts (SX Dutch-side bank, crypto, US brokerage) and need to assess Form 3916 obligations
• You invested in Hurricane Irma reconstruction projects with extended depreciation schedules

You can find vetted Saint Martin practitioners through the directory below.

This page is general information. It is not personal guidance for your specific situation. Tax rules in a COM can change independently of metropolitan France. Always verify current rules with the BCI or a licensed local practitioner before filing.