Calculator Form
Formula Used
Counted current days = current physical presence days - valid current excluded days.
Counted prior days = prior physical presence days - valid prior excluded days.
Counted second prior days = second prior physical presence days - valid second prior excluded days.
Weighted total = counted current days + counted prior days ÷ 3 + counted second prior days ÷ 6.
Test result = pass when current counted days are at least 31 and weighted total is at least 183.
How to Use This Calculator
- Enter the tax year you want to test.
- Enter physical presence days for the current year.
- Enter valid excluded current year days by category.
- Enter prior year and second prior year presence days.
- Subtract only valid excluded days for prior years.
- Select review options for green card, closer connection, and treaty issues.
- Press the calculate button.
- Download the result as CSV or PDF for records.
Example Data Table
| Scenario | Current Counted Days | Prior Counted Days | Second Prior Counted Days | Weighted Total | Estimated Result |
|---|---|---|---|---|---|
| Short business visits | 45 | 90 | 60 | 85.00 | Does not meet test |
| Frequent repeat visitor | 130 | 150 | 120 | 200.00 | Likely meets test |
| Current year below 31 days | 25 | 360 | 360 | 205.00 | Fails current year rule |
The Substantial Presence Test Explained
The substantial presence test is a day counting rule. It helps decide whether a visitor is treated as a United States tax resident for a calendar year. The test is useful for students, workers, business travelers, retirees, and frequent visitors. It does not replace professional tax advice. It gives a structured estimate.
Why Day Weights Matter
The rule does not count every year equally. Current year days count in full. Prior year days count as one third. Second prior year days count as one sixth. This design measures a pattern of repeated presence. A person with many recent days will reach the threshold faster. A person with older visits may have a smaller weighted total.
Important Exclusions
Some days may be excluded before the formula is applied. Common examples include certain exempt individual days, medical condition days, commuter days from Canada or Mexico, transit days under twenty four hours, and crew member days on foreign vessels. Users should enter only days that qualify. Wrong exclusions can change the answer.
Interpreting Results
The calculator checks two tests. First, current year counted days must be at least thirty one. Second, the weighted three year total must be at least one hundred eighty three. Both must pass. If either test fails, the substantial presence test is not met.
Closer Connection Review
Some users may meet the math test but still need a closer connection review. This usually matters when current year days are below one hundred eighty three and the person keeps a tax home and stronger ties abroad. The calculator flags this situation, but the final decision depends on facts, forms, and deadlines.
Using the Calculator Well
Collect travel records before entering values. Include arrival and departure days unless a valid exception applies. Keep supporting notes for each excluded day. Compare the result with visa status, green card status, treaty positions, and filing duties. Use the CSV and PDF buttons to save a working copy for review.
Practical Reminder
This tool is a planning aid. It cannot know every legal exception. Review official instructions before filing. When facts are complex, ask a qualified adviser. A careful review can prevent residency mistakes and late form problems for taxpayers.
FAQs
What is the substantial presence test?
It is a weighted day count used to estimate whether a foreign individual may be treated as a United States tax resident for a calendar year.
What are the two main thresholds?
You generally need at least 31 counted current year days and at least 183 weighted days across the current year and two prior years.
How are prior year days counted?
Prior year counted days are divided by three. Second prior year counted days are divided by six before being added to the current year days.
What are excluded days?
Excluded days are presence days that may not count under a valid exception, such as certain exempt individual, medical, transit, commuter, or crew member days.
Does passing the calculator always mean residency?
No. It is an estimate. Green card status, treaty claims, closer connection facts, visa rules, and filing deadlines may affect the final tax position.
What is the closer connection review?
It checks whether the user may need separate review because they meet the math test but have fewer than 183 current year days and foreign ties.
Should arrival and departure days be counted?
Usually, any part of a day physically present in the United States can count unless a valid exception applies to that day.
Can I save my result?
Yes. After submitting the form, use the CSV button for spreadsheet records or the PDF button for a simple printable report.