The 30 Day Rule: How Days Outside Both the US and Puerto Rico Count

What the 30 day rule actually says

Working out your presence test count for the year? There is a narrow allowance worth knowing about. Up to a total of 30 days spent outside both Puerto Rico and the United States, for business or personal travel, can still count as days of presence in Puerto Rico. Publication 570 says so directly, and the rule traces to 26 CFR 1.937-1, the regulation defining bona fide residency in a US possession.

"Outside both" means outside Puerto Rico and outside the United States. A stopover in a third country qualifies. A layover on the US mainland doesn't, because that day is a US presence day, not a day outside both jurisdictions.

A day of presence, in this context, is a day the presence test treats as spent in Puerto Rico even though you were physically somewhere else. It's one of a small set of rules that adjust the raw day count. For the fuller framework these adjustments sit inside, see what counts as a day in Puerto Rico.

The two conditions that limit it

The 30 day rule isn't an unconditional bonus. Publication 570 attaches two limits, and both matter.

Your Puerto Rico days must already exceed your US days

The rule applies only if the number of days you're considered present in Puerto Rico exceeds the number of days you're considered present in the United States, figured without the 30 day rule itself. In plain terms: the rule widens a gap that already exists. It does not create one. Say your unadjusted count for the year is 100 Puerto Rico days against 120 US days. The 30 day rule doesn't apply that year, no matter how much of your remaining travel was to a third country.

It does not reach the 549 day test's 60 day floor

The rule doesn't apply toward the minimum 60 days of presence in Puerto Rico required for each year of the 549 day, three year alternative test. That test, described in 26 CFR 1.937-1, requires at least 549 days present in Puerto Rico across three years, with at least 60 real presence days in each of those three years. The 30 day rule is defined out of that 60 day floor entirely.

Why the 30 day rule cannot fill a thin 549 day year

This second limit trips people up. Worth stating plainly: a taxpayer relying on the 549 day test needs 60 actual presence days in Puerto Rico in every one of the three years, and the 30 day allowance doesn't count toward that number. A year with 45 real Puerto Rico days and 20 days on a third country trip still comes up short of the 60 day floor, even though those 20 days would have helped under the 183 day annual test.

Know which presence test path you're relying on before you count on this rule. Under the 183 day annual test, it can be the difference between passing and falling short. Under the 549 day test, it does nothing for the yearly minimum.

Not the medical treatment exception, a different rule

Publication 570 and 26 CFR 1.937-1 also let days absent from Puerto Rico to receive, or accompany a family member for, qualifying medical treatment count as presence days. That's a separate rule with its own documentation requirements and no 30 day cap. Easy to conflate the two, since both let an absence count as a presence day, but they run on different conditions.

The 30 day rule carries no medical justification requirement, but it's capped at 30 days a year and conditioned on your territory days already exceeding your US days. The medical treatment exception carries neither cap, subject to its own documentation standard. For that separate rule, see the qualifying medical treatment exception.

A worked example

Say your unadjusted count for the year is 160 days present in Puerto Rico and 25 days present in the United States. Puerto Rico already exceeds the US count, so the first condition is met.

Now add a two week trip to a third country, plus a few short weekend trips elsewhere, entirely outside both Puerto Rico and the United States, totaling 22 eligible days. Add those to your 160 and you get 182 days: one short of the 183 day threshold for the 183 day presence test. One more qualifying day outside both jurisdictions and the total reaches 183, satisfying the annual presence test for the year.

That kind of margin is exactly why a running day count matters, trip by trip, as the year unfolds. An automatic day ledger is what One83 keeps for you, so a year where this rule might matter gets flagged before you're guessing at the count in April.

Recordkeeping for a day claimed under this rule

Keep the paper trail: boarding passes or itineraries showing the dates and confirming you were outside both Puerto Rico and the United States, plus a personal note of the trip's purpose. This isn't about interpreting the rule differently than the IRS does. It's about being able to show an examiner, months or years later, exactly where you were on a given day. See documenting presence for an audit for the fuller recordkeeping picture.

Frequently Asked Questions

Does the 30 day rule apply to the 549 day test?

No. Publication 570 states the 30 day rule does not apply for purposes of the minimum 60 days of presence required in Puerto Rico for each year of the 549 day, three year alternative test. It can help satisfy the 183 day annual test, not the 60 day per year floor.

Do the 30 days have to be one trip?

No. Publication 570 describes an annual allowance of up to 30 days total, for business or personal travel outside both Puerto Rico and the United States, not a single continuous trip. Multiple shorter trips can be combined up to the 30 day cap.

What if my Puerto Rico days do not already exceed my US days?

Then the rule doesn't apply that year. The 30 day allowance only operates once your territory presence, counted without the rule, already exceeds your US presence. It widens an existing gap, it doesn't create one.

Is a day spent in a third country eligible?

Yes. The rule covers days you're outside both Puerto Rico and the United States, which includes time in any third country, not just transit through the US mainland.

Conclusion

Up to 30 days entirely outside Puerto Rico and the United States can count toward the 183 day presence test, but only once your Puerto Rico days already outnumber your US days, and never toward the 549 day test's 60 day yearly floor. Confirm which presence test path applies to your year before you rely on it, and keep the itinerary that backs up every day you claim.

Not sure which presence test path fits your situation? Read the guides on the 183 day presence test and the 549 day, three year alternative before you count on this rule.

One83 is a tracking tool, not tax advice. Consult a licensed tax professional about your situation.