Residency Audit Risk Score

What Triggers a Residency Audit?

The single most common trigger is a high-income taxpayer filing a part-year return or a change-of-domicile declaration after moving from a high-tax state (New York, California, New Jersey, Connecticut, Minnesota) to a no-tax state (Florida, Texas, Nevada, Wyoming). The departure state has a direct financial incentive to challenge your move — your tax bill is their revenue loss.

States use data matching to identify targets. When your W-2 or 1099 suddenly stops showing up on their returns, or when you file a part-year return claiming you left mid-year, the audit division takes notice. New York's Department of Taxation and Finance runs a dedicated residency audit program that generates hundreds of millions in annual revenue from challenged domicile changes.

The 5 Factors Auditors Examine

Every residency audit boils down to the same core question: where is your real home? Auditors evaluate five primary categories of evidence:

1. Home. Where do you maintain a permanent place of abode? Do you own or rent property in your former state? Is it available for your use year-round? This is the single highest-weighted factor.
2. Active business involvement. Where are your business operations? Where do you physically work? If you still have an office or active role in your former state, that cuts heavily against your domicile change.
3. Time. How many days did you spend in each state? The raw day count matters, but auditors also look at the pattern — weekdays vs. weekends, consecutive-day runs, and which state you were in during holidays and important life events.
4. Items near and dear.Where are your family photos, pets, heirlooms, and irreplaceable personal possessions? Auditors view these as the things you'd grab in a fire — and therefore, the truest signal of where you consider home.
5. Family connections.Where does your spouse live? Where do your children go to school? If your family remains in your former state, auditors will argue the family home hasn't actually moved — regardless of where you personally sleep.

Beyond these five, auditors also look at secondary factors: voter registration, driver's license, vehicle registration, bank accounts, professional licenses, club memberships, religious affiliations, and where you receive mail. No single factor is dispositive, but the totality of the evidence determines the outcome.

How to Reduce Your Audit Risk

The best defense is a clean, well-documented domicile change. Within 90 days of your move:

• Obtain a driver's license in your new state and surrender the old one.
• Register to vote in your new state.
• Update vehicle registrations, bank accounts, and insurance policies.
• File a Declaration of Domicile if your new state offers one (see our Residency Change Checklist).
• Sell or formally vacate property in your former state. If you keep it, sublease to an unrelated party with a bona fide lease.
• Move your “near and dear” personal items to your new home.
• Start tracking your days with a GPS-based tool — iReside does this automatically and generates audit-ready reports in one click.

For ongoing protection, keep your days in your former state well below the statutory threshold, and maintain contemporaneous records of where you are every day of the year. In an audit, the taxpayer typically bears the burden of proof — and missing records generally default against you.

Frequently Asked Questions

What is a residency audit?

A residency audit is when a state tax authority investigates whether you are truly a resident or non-resident for income tax purposes. The state reviews your financial ties, physical presence, and personal connections to determine where you should pay tax. New York, California, Minnesota, and Connecticut are particularly aggressive about auditing people who claim to have moved to a no-tax state.

What triggers a residency audit?

The most common trigger is a high-income taxpayer who recently changed their domicile from a high-tax state to a low-tax or no-tax state. States have a direct financial incentive to keep you on their tax rolls. Other triggers include: filing a part-year return, maintaining property in your former state, or having a spouse who still spends time there.

How accurate is this risk score?

This score is a directional indicator based on the factors auditors typically examine — it's not a legal opinion. A low score doesn't guarantee you won't be audited, and a high score doesn't mean you will be. But it does highlight the areas where your residency position is weakest, so you can address them proactively.

What can I do to lower my audit risk?

The most impactful steps: (1) sell or formally vacate property in your former state, (2) update your driver's license and voter registration to your new state, (3) track your days with a GPS-based app like iReside so you have contemporaneous records, (4) file a Declaration of Domicile if your new state offers one (Florida does), and (5) move your 'near and dear' personal items (family photos, pets, heirlooms) to your new home.

Does income level affect my audit risk?

Yes — significantly. States prioritize auditing high-income taxpayers because the return on investment for the audit is larger. A taxpayer earning $2M who moves from New York to Florida represents over $200K in annual lost revenue to New York. That financial incentive makes the state much more likely to challenge the domicile change than for a taxpayer earning $100K.

How long after moving am I at risk?

The first 1–2 years after a domicile change are the highest-risk period. Your former state will be watching for your next filing — especially if you file a part-year return. Risk generally decreases over time if your new domicile is cleanly established and maintained. By year 3–5, most states shift their audit resources to more recent departures.

What is a Declaration of Domicile?

A Declaration of Domicile is a formal legal document you file with your new state's county clerk declaring your intent to make that state your permanent home. Florida, South Dakota, and several other states offer them. Filing one costs nothing and takes minutes, but it creates a strong evidentiary record of your intent to change domicile — which is exactly what an auditor from your former state would challenge.

How does iReside help with audit defense?

iReside tracks your physical location every day via GPS and logs which state you're in. If you're ever audited, you have a contemporaneous, technology-verified record of every day of the year — widely considered the gold standard of evidence. iReside also alerts you before you hit a state's day-count threshold so you can adjust your travel plans proactively.