Ferries, Cruises and Day Trips

Short trips are where presence tracking gets messy. A count built from long stays is easy. A count built from ferry rides, island hops, cruise itineraries, and same day mainland flights is where people quietly gain days they did not know they had, or lose days they assumed were free.

The underlying rule never changes: you are present in Puerto Rico on any day you are physically present there at any time. What changes is the geography, and the geography here is unintuitive.

The three buckets

Every day of the year lands in one of three buckets for these rules:

1. Puerto Rico. The main island plus its municipalities, including Vieques and Culebra.
2. The United States. Generally the fifty states and the District of Columbia.
3. Neither. Everywhere else, including foreign countries and, importantly, the other United States territories.

That third bucket is where people go wrong. The United States Virgin Islands, the British Virgin Islands, the Dominican Republic, and Sint Maarten are all in bucket three, and only bucket three days that qualify under the 30-day travel allowance can be pulled back onto the Puerto Rico side. The mechanics of that allowance are in what counts as a day in Puerto Rico.

Ferries within Puerto Rico

The ferries from Ceiba to Vieques and Culebra never leave Puerto Rico, because both are Puerto Rico municipalities. A week on Vieques is a week of Puerto Rico days, and nothing about the boat changes that. Sea travel is not inherently a problem. Sea travel that crosses a jurisdictional line is.

Ferries and short hops that leave Puerto Rico

The ferry and short flights from Puerto Rico to St. Thomas, St. Croix, or Tortola do cross a line.

A same day round trip from Fajardo to St. Thomas typically still gives you a Puerto Rico day, because you were physically present in Puerto Rico that morning and evening. You do not gain a United States day, because the United States Virgin Islands is not the United States for these purposes.

An overnight or multi-night stay is different. The intervening days, where you never set foot in Puerto Rico, are bucket three days. They are candidates for the 30-day travel allowance, but that allowance is capped, conditional on your Puerto Rico days exceeding your United States days without it, and unavailable for the 60-day annual minimum inside the 549-day condition. A long weekend in the British Virgin Islands four times a year is roughly twelve bucket three days, a real cost against a budget you may want for something else.

Cruises

Cruises are the hardest case because a single voyage crosses several categories.

Embarkation day. If you board in San Juan, you were physically present in Puerto Rico that day. It is a Puerto Rico day.

Disembarkation day. Same reasoning if you return to San Juan.

Days at sea. In international waters you are outside both Puerto Rico and the United States. These are bucket three days, eligible for the 30-day allowance if the conditions are satisfied.

Foreign port days. Sint Maarten, Antigua, Aruba, the Dominican Republic. Bucket three.

Territory port days. St. Thomas, St. Croix. Also bucket three, not Puerto Rico.

Mainland port days. A call at Fort Lauderdale, Port Canaveral, or Galveston is physical presence in the United States and generally creates a United States day.

A seven-night round trip from San Juan with no mainland port call therefore tends to produce two Puerto Rico days and five bucket three days. A repositioning cruise ending in Florida adds a United States day at the end.

The territorial waters question

There is a genuine gap here. Publication 570 does not address whether a ship sitting inside Puerto Rico territorial waters, with no one going ashore, produces a Puerto Rico day. It does use a three mile measure elsewhere, in the seafarer rule for the tax home test, but that rule is about tax home rather than presence and should not be read across.

Do not build a plan around the ambiguity. Record where the ship was and whether you went ashore, and let your tax professional take the position.

Day trips to the mainland

Two rules interact. The regulation under Internal Revenue Code section 937 provides that if during a single day you are physically present in both the United States and the possession, that day is considered a day of presence in the possession. The general rule is also that you are present in the United States on any day you are physically present there at any time.

The regulation states the tie break in favor of Puerto Rico, but it does not go on to say the day is also excluded from your United States count for the 90-day condition, and practitioners take different views. If your position depends on the 90-day condition, raise this with your advisor explicitly rather than assuming either answer. What is clear either way: record both legs with times.

Transit stops

The transit exception is more valuable than most people realize. Publication 570 does not count a day you are in the United States for fewer than 24 hours while traveling between two places outside the United States, and Puerto Rico is outside the United States for this rule. So San Juan to Miami to Madrid in one day generally does not produce a United States day, and neither does the return.

The exception has a hard edge at 24 hours. An overnight in Miami on the way to Europe crosses it. A same day connection is worth the inconvenience, and the flight times are the evidence.

Private aviation and small aircraft

Charter flights and small carrier hops around the Caribbean often produce no boarding pass, no airline account history, and no passport stamp, which leaves your count resting on your own record and the operator's manifest. Ask the operator for logs or manifests routinely rather than after the fact. This is the most common documentation gap in the presence files of people who travel around the region. See how to document presence for an audit.

Planning short trips deliberately

A few habits keep short travel from eroding a year:

• Treat the 30-day allowance as a budget with a balance, not a free pool
• Prefer same day mainland turns over overnights
• Route long haul travel through mainland connections in a single day
• Remember that regional island travel is not neutral, even though it feels local
• Watch the 60-day floor in each year of the three-year condition, which the allowance cannot help with

One83 sorts each travel day into Puerto Rico, United States, or outside both, tracks how much of the 30-day allowance you have used, and shows the effect of a planned trip on all five conditions before you book it. Seeing that four nights in Tortola takes your allowance to 28 days is more useful in October than in April.

For the thresholds these days count against, see the 183-day rule, explained and presence test vs tax home vs closer connection.

Frequently asked questions

Does a ferry to Vieques or Culebra break my Puerto Rico day count?

No. Vieques and Culebra are municipalities of Puerto Rico, so travel between the main island and either of them stays within Puerto Rico. Those are ordinary Puerto Rico days.

Is a day trip to St. Thomas a Puerto Rico day?

Time in the United States Virgin Islands is not Puerto Rico presence, and it is not United States presence either. If you left Puerto Rico that morning you were physically present there during the day, so the day generally counts as a Puerto Rico day on that basis. Stay overnight and the intervening days sit outside both jurisdictions.

How do cruise days count?

Days you are physically present in Puerto Rico, including the San Juan departure and return days, are Puerto Rico days. Days at sea and days in foreign or other territory ports are outside both jurisdictions. A port call in Florida creates a United States day.

Does flying to Miami and back the same day cost me a Puerto Rico day?

The regulation provides that a single day of physical presence in both the United States and the possession is considered a day of presence in the possession. It does not say the day is removed from your United States count for the 90-day condition, so record both legs and let your tax advisor decide.

What about a connection through a mainland airport?

Publication 570 does not count a day you are in the United States for fewer than 24 hours while traveling between two places outside it, and Puerto Rico is outside the United States for this purpose. Keep both segments with times, because the exception depends on elapsed time.

Disclaimer

One83 is a presence tracking tool, not a tax advisor, and this guide is general information rather than tax advice. Several of the situations above, particularly territorial waters and same day dual presence, are not resolved cleanly in published guidance. Consult a licensed tax professional familiar with Internal Revenue Code section 937 and Puerto Rico Act 60, and see IRS Publication 570 for the official rules.