Sint Maarten is one of the busiest marine hubs in the Caribbean, and the businesses built around that traffic look nothing like a conventional island company. Revenue arrives in a compressed season, a large part of the workforce rotates in and out on contracts measured in months, and the service itself frequently begins in one territory and ends in another.
None of that removes the tax obligations. It changes where they attach and makes them easier to get wrong. This guide works through the four positions that matter most, which are the charter operator, the vessel owner, the crew member and the shoreside marine services business, and where each one tends to run into trouble.
Start With Where the Supply Happens
The first question in almost every marine tax discussion is not what the company earns. It is where the service is supplied and who supplies it.
Turnover tax in Sint Maarten attaches to the delivery of goods and the supply of services inside the territory, at 5%, filed monthly. That test is about the supply, not about where the company is incorporated or where the money is banked. A business established elsewhere can find that its Sint Maarten activity is within the charge, and a business incorporated locally does not automatically bring every part of its revenue into it.
For a charter operation this becomes a real question rather than an academic one. A day charter that departs and returns to a Dutch side marina is straightforward. A week long itinerary that begins in Sint Maarten and spends most of its nights in Anguilla, St Barths and the British Virgin Islands is not, and the treatment depends on how the contract is written, who the contracting party is, and what exactly the client is paying for.
The practical guidance is unglamorous. Decide the position deliberately, in writing, before the season starts, with advice. Deciding it retrospectively when a return is late is how operators end up defending a position they did not actually choose.
Charter Revenue and the Turnover Tax Base
Three points cause most of the errors on charter turnover.
Who is the supplier. Where a central agent or broker markets the vessel, the contractual chain matters. The agent supplying a booking service to the owner and the owner supplying a charter to the client are two different supplies with two different treatments. A commission netted off before the money reaches the owner does not reduce what the owner supplied.
What sits inside the charter fee. Charter contracts in this market frequently separate the base fee from an advance provisioning allowance, fuel, dockage, delivery and crew gratuity. Some of those items are consideration for the supply and some are genuinely handled on the client's behalf. The distinction has to be reflected in how the contract is written and how the money actually moves, not asserted afterwards on a spreadsheet.
The tax you pay upstream stays a cost. Sint Maarten does not operate an input credit system. The 5% charged by the yard, the provisioner, the fuel dock and the agent is embedded in your cost base, and it compounds through the chain. In a business with thin margins and long supplier chains, that compounding is a pricing input rather than a rounding item.
Vessel Ownership and Structure
Vessels are almost always held through an entity rather than personally, and the reasons are only partly tax driven. Liability separation, financing, flag state requirements and the intention to eventually sell the owning company rather than the hull all push in the same direction.
The tax questions that follow are whether the owning entity is trading, where it is resident, and what relationship it has with the operating company. An owning entity that charters the vessel to a separate operating company is making a supply, and that supply has a treatment. Related party arrangements of that kind need to be priced on defensible terms and documented at the time.
Where the owning entity is a Sint Maarten NV or BV that trades, profit tax applies at 34.5% on taxable profit, with the annual return due by 30 June and provisional payments through the year. Our profit tax guide covers the mechanics, and the NV, BV and foundation comparison covers what each vehicle is suited to.
The customs and importation treatment of a vessel, including any temporary admission arrangements available to visiting yachts, is governed by customs rules rather than by the tax filings discussed here, and the treatment turns on specific facts about the vessel, its flag, its use and its duration in the territory. Confirm the position with a customs broker or advisor for the specific vessel before relying on an assumption, particularly where a yacht moves between charter use and private use during a season.
Crew: The Position That Causes the Most Damage
Crew engagement is where marine businesses in Sint Maarten most often find an unbudgeted liability, and the cause is almost always the same. Crew are engaged on an invoice because that is how the industry has always done it, and the arrangement is never revisited.
Sint Maarten applies a substance test to employment. Three elements make an employment agreement: work performed personally, remuneration for that work, and a relationship of authority under which the engaging party can direct how, when and where the work is done. A captain who sets a deckhand's watch, decides their duties, controls their leave and provides the vessel, the tools and the accommodation is exercising authority, whatever the paperwork says.
Where the relationship is employment and the employer is a Sint Maarten entity, wage tax withholding and SZV premium obligations follow, and they follow retrospectively for the periods already worked. Reclassification is expensive precisely because it looks backwards. Our guide to contractor and employee classification sets out the test and what exposure looks like when it is applied.
Rotational and non-resident crew
The seasonal, rotating nature of yacht crew makes the residence question genuinely difficult rather than merely fiddly. Crew who spend part of the year in Sint Maarten, part at sea and part in a home country can have a residence position that is not obvious, and the answer drives whether their worldwide income is declarable here.
What matters is the pattern of facts rather than a single number: where the person actually lives when not working, where their family and home are, the days spent in the territory, what their contract says about base, and which entity pays them. Two crew members on the same vessel can reach different answers. Where a crew member is genuinely resident here, our guide to worldwide income and double taxation relief covers what that means in practice.
The employer's exposure is separate from the crew member's. An entity established here that pays people is likely to have withholding obligations regardless of how any individual crew member's personal residence resolves.
Work permits and the seasonal workforce
Bringing in crew and seasonal shoreside staff who are not entitled to work locally engages the permit system, and the permit position and the tax position are separate but linked. A permit issue on review frequently surfaces the payroll question at the same time, because both are answered from the same records. Our employer sponsorship guide covers the permit side, and registering as an employer covers what has to be in place before the first payroll runs.
Shoreside Marine Services
Yards, riggers, provisioners, agents, marina operators and the whole chain of businesses that serve visiting vessels have a more conventional profile, with two features worth flagging.
The first is that turnover tax compounding hits this chain particularly hard. A refit passes through several suppliers, each charging 5% on a base that already contains the previous stage's tax, and none of it is recoverable. Quotes built by marking up supplier invoices without accounting for this understate the true cost.
The second is seasonality in payroll. A workforce that triples between December and April and contracts through the summer creates real questions about contract type, notice, vacation accrual and severance. Fixed term contracts used repeatedly with the same person do not stay fixed term indefinitely under Sint Maarten employment law, and businesses that run the same seasonal staff for several years frequently discover they have created permanent relationships without intending to. Our guides to employment contracts and vacation pay, severance and thirteenth month cover where that lands.
The Calendar the Season Ignores
Marine businesses run on a season. The tax system does not. Turnover tax is filed monthly through the quiet months as well as the busy ones, the profit tax return is due by 30 June regardless of when the money came in, and payroll filings continue for any staff retained through the summer.
The predictable failure is a business that files diligently from January to April, then goes quiet, and returns in November to find several nil or near nil periods unfiled and penalised. Nil returns still have to be filed. Our 2026 employer compliance calendar lays out the year, and it is worth working through before the season rather than during it.
The Short Version
Decide three things in writing before the season, not during it. Where your supply is treated as happening and what that means for turnover tax. Whether each person aboard and ashore is an employee or a contractor on the facts rather than on the invoice. Which entity owns, which entity operates, and on what terms they deal with each other.
Businesses that settle those three questions in advance spend the season running boats. Businesses that leave them open spend the following summer reconstructing the answers under time pressure.
If you operate a charter business, a marine services company or a vessel owning entity in Sint Maarten and want the structure reviewed before the season, talk to us. Our guidance for yacht crew covers the individual position in summary. Confirm current rates, filing dates and any customs treatment directly with the relevant authority before relying on a figure in this article.