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State rules

Arizona residency day rule.

Spending more than nine months of the tax year in Arizona creates a presumption that you are a resident. Shorter stays don't create the opposite presumption.

Summary as of October 2026 · Not tax advice

Day linemore than 9 months
Type of testMonths test (days approximate)
Home in the state requiredNo
LawA.R.S. § 43-104
Official sourceazdor.gov

What it means

This test is written in months, so a day count is only an approximation. We flag you as close well before the line.

Keep the record

Whatever the rule, the person claiming not to be a resident usually has to prove it. Log every day, including travel days, and keep the receipts, boarding passes and photos that back it up. What auditors ask for.

States with the same kind of test

Questions

How many days can I spend in Arizona without becoming a resident?

Spending more than nine months of the tax year in Arizona creates a presumption that you are a resident. Shorter stays don't create the opposite presumption. Days alone aren't the whole story: domicile is a separate test.

Does a partial day in Arizona count?

Most states with a day test count any part of a day in the state. Check the state's guidance for its exceptions.

Count your days

Free and private. Your log stays on your device.