Do U.S. Transit Days Count Toward the Substantial Presence Test?

For the U.S. Substantial Presence Test, the default rule is strict: if you are physically present in the United States at any time during a day, that day generally counts as a U.S. presence day.

There is a narrow transit exception. The IRS lists an exception for days when you are in the United States for less than 24 hours while in transit between two places outside the United States.

That phrase matters. It is not the same as "all layovers are excluded."

Quick answer: U.S. transit days generally count unless a specific IRS exception applies. The transit exception is for less than 24 hours in the United States while traveling between two places outside the United States.

Jetseen helps you track days - always consult a qualified tax professional for advice specific to your situation.

The Substantial Presence Test in one paragraph

The U.S. Substantial Presence Test is a tax-residency day-count test for people who are not U.S. citizens and are not green-card holders.

The IRS test includes two parts: at least 31 days of U.S. presence in the current year, plus a weighted 183-day calculation across the current year and two prior years.

The weighted calculation counts:

Year	Weight
Current year	All U.S. days
Prior year	One-third of U.S. days
Second prior year	One-sixth of U.S. days

This guide is not another full SPT explainer. It is about one narrow question: what happens when the U.S. day was only a transit day?

What is the default rule for partial U.S. days?

The IRS says a person is treated as present in the United States on any day they are physically present in the country at any time during the day.

That means partial days usually matter.

Examples that generally need to be counted unless a specific exception applies:

• arriving in the evening and sleeping in the United States
• departing early in the morning after being in the United States overnight
• entering for meetings and leaving the same day
• connecting through the United States in a way that does not meet the official transit exception

The safest habit is to record the day first, then ask whether any IRS exclusion applies. Do not start from the assumption that short days never count.

When can a U.S. transit day be excluded?

The IRS lists an exception for days when you are in the United States for less than 24 hours while in transit between two places outside the United States.

Both parts matter:

1. Less than 24 hours in the United States.
2. In transit between two places outside the United States.

If either part is missing, do not assume the day is excluded.

For example, a short airport connection on a trip from one non-U.S. country to another may be the kind of fact pattern to review under the IRS transit exception. A same-day U.S. business stop, a visit with a U.S. destination, or an overnight stay may raise a different question.

This guide does not decide whether your day is legally excludable. Bring the exact facts to a qualified tax professional.

Other excluded-day categories exist

The IRS lists other categories that may be excluded from the SPT count.

Those include:

• regular commuter days from Canada or Mexico, when IRS conditions are met
• days as a crew member of a foreign vessel
• certain days when a medical condition kept you from leaving the United States
• days as an exempt individual under specific visa or status categories

"Exempt individual" is an IRS term. It does not simply mean someone who feels exempt from U.S. tax. The category has specific rules.

The IRS also says Form 8843 is required when excluding days for exempt-individual or medical-condition reasons. Do not treat that sentence as filing advice. Treat it as a prompt to check the current IRS form instructions and ask a qualified tax professional.

What records should you keep for transit days?

If U.S. transit days could matter to your SPT calculation, keep enough detail to separate ordinary U.S. days from possible excluded days.

Track:

• arrival date and time
• departure date and time
• airport or port of entry
• country you came from
• country you traveled to next
• whether the U.S. stop was under 24 hours
• whether the trip was between two places outside the United States
• boarding passes, itineraries, tickets, or other records that support the route
• any days you believe may fall into another IRS excluded-day category

A clean record does not make an excluded day valid by itself. It gives your advisor the facts needed to evaluate the rule.

Why this matters even if you rarely visit the U.S.

The SPT formula looks across three calendar years. A few U.S. days in the current year may seem harmless until they combine with prior-year days.

Transit days can feel too small to record, especially when the stop was only a connection. But the default IRS rule counts any part of a U.S. day unless an exception applies.

If you cross the United States often, vague notes like "layover" are not enough. Record the route, times, and purpose so the day can be reviewed correctly later.

Where Jetseen fits

Jetseen helps users track residency and visa days across countries. For U.S. SPT planning, that means keeping a clearer record of U.S. presence beside the other countries and rules you manage.

Jetseen does not determine whether a day is legally excludable. It does not file Form 8843, decide tax residence, apply the closer connection exception, or replace a tax professional.

If you want one place to track U.S. days and export a cleaner record for advisor review, Try Jetseen Free for 14 Days.

Jetseen helps you track days - always consult a qualified tax professional for advice specific to your situation.

Sources

• IRS: Substantial Presence Test
• IRS: Publication 519, U.S. Tax Guide for Aliens
• IRS: Form 8843