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The Business Activities Factor: What Counts Twice Under Puerto Rico's Closer Connection Test
Passing the tax home test does not settle your business activities. The closer connection test counts them again, narrower than most people assume.

What the tax home test already counted
Pass the tax home test, and it is tempting to think the question of where your business lives is settled. It is not. Bona fide residency in Puerto Rico runs on three separate tests: presence, tax home, and closer connection, each graded on its own under 26 CFR 1.937-1. The tax home test asks one narrow thing: did you have a tax home, meaning your regular or principal place of business, outside Puerto Rico during any part of the year? Answer no, and that test is cleared. It says nothing about the other two. For the full rundown, see the presence, tax home, and closer connection tests.
The closer connection test is where business activity gets a second look, and it is asking a different question than the one the tax home test already answered.
Why the factor list looks past the tax home test
The closer connection test does not grade one factor at a time. It weighs the totality of your connections to Puerto Rico against the aggregate of your connections to the United States and any foreign country, under the same regulation. Business activity is one factor among roughly ten enumerated ones, sitting alongside your permanent home, your family, your personal belongings, your organizational memberships, and your banking activity.
That structure matters. No single factor gets neutralized by a result on a different test. Family location makes the clearest parallel: where your household lives is graded under closer connection independent of everything else you have established, including how a split household affects the closer connection test. Business activity works the same way. Clearing the tax home test does not remove it from the closer connection comparison. It just changes which part of it still counts.
The exact regulatory language, and what it excludes
The business activities factor is written narrowly. 26 CFR 301.7701(b)-2(d)(1)(vi) lists, as a closer connection factor, "the location where the individual conducts business activities (other than those that constitute the individual's tax home)."
Read that parenthetical carefully. It excludes only the specific business activity that already makes up your tax home, nothing more. Any other business activity, most commonly a mainland business kept going alongside a Puerto Rico tax home, falls outside that exclusion. It stays in scope and gets weighed as a closer connection factor.
The organizations factor in the same regulation works the same way: membership and participation are counted on their own terms, regardless of what other tests you have passed. See the organizations factor in the same closer connection test for how that plays out. The pattern across the factor list holds steady. Passing one test narrows what still needs to be proven. It does not clear the rest of the list.
This is where people mix up the tax home test with the business activities factor. They are not the same question. The tax home test asks where your main place of business sits. The business activities factor asks whether you have any other business activity anywhere else, and if that other activity points toward the mainland, it counts against you in the closer connection comparison.
A tax home in Puerto Rico that still failed
IRS Publication 570 documents exactly this outcome. An individual moved to Puerto Rico and established a tax home there through a consulting and venture capital business, satisfying the tax home test on its own terms. Spouse and children, jointly owned property, club and organizational memberships, and banking relationships all stayed in California.
The result: a closer connection to the United States than to Puerto Rico. The individual did not qualify as a bona fide resident for the year, despite a valid Puerto Rico tax home. Two tests, same person, same year, different answers, because they were never asking the same question in the first place.
Frequently Asked Questions
Does passing the tax home test mean my business activities are done being counted?
No. The tax home test and the closer connection test are separate tests under 26 CFR 1.937-1, graded independently. Passing the tax home test satisfies only that test. The closer connection test has its own business activities factor, and it looks at any business activity you have other than the one that established your tax home.
What exactly does the closer connection business activities factor exclude?
Only the activities that make up your tax home. 26 CFR 301.7701(b)-2(d)(1)(vi) lists the location of your business activities as a factor, with a parenthetical that carves out activities already counted for the tax home test. Everything else, including a separate mainland business, stays in play.
Can I have a Puerto Rico tax home and still fail bona fide residency?
Yes. Publication 570 documents a case where an individual set up a consulting and venture capital business in Puerto Rico, satisfying the tax home test, and was still found to have a closer connection to the United States because spouse, children, property, memberships, and banking stayed on the mainland.
Is this the same issue as counting travel days under the presence test?
No, it is a separate question. The presence test counts days physically in Puerto Rico. The business activities factor belongs to the closer connection test and looks at where you conduct business, not where you were on a given day.
Conclusion
The tax home test and the closer connection business activities factor ask different questions. Only the one activity that already makes up your tax home is excluded from the second look. Everything else you run stays on the table. An automatic day ledger, which is what One83 keeps for you, only covers the presence test. The closer connection factors, business activity included, still need their own tracking and their own weighing.
One83 is a tracking tool, not tax advice. Consult a licensed tax professional about your situation.