Defending a residency audit: timeline, evidence, and what auditors actually do
State residency audits target high-earners who claim to have left. Here's what to expect, the timeline, the evidence requests, and how to defend your domicile and day count.
If you've changed residency from a high-tax state to a low-tax one, your odds of an audit aren't 5%. They're closer to 50%, and for high earners with income over $1M, they're higher. New York, California, New Jersey, Connecticut, and Massachusetts all run aggressive residency-audit programs targeting departing residents. Here's what to expect and how to defend yourself.
The timeline of a residency audit
- Months 0–12 after move: file part-year return showing departure. State assigns it for review.
- Months 12–24: a residency questionnaire arrives. You have 30–60 days to respond.
- Months 24–36: follow-up requests. Specific months challenged. Cell tower data, EZ-Pass, credit card statements requested.
- Months 36–48: proposed assessment with disputed days. Negotiation phase.
- Months 48–60: appeals or settlement. Some cases reach state tax tribunals.
Residency audits are slow. A NY audit can run 3–5 years before resolution. Plan for sustained engagement, and start your evidence file the day you move.
Evidence the auditor will request
- Travel records: boarding passes, hotel receipts, train tickets, rental car contracts.
- Cell phone records: billing statements showing call/data location data.
- Credit card statements: showing where charges were made, day by day.
- Bank statements: ATM withdrawals, deposits, location data.
- EZ-Pass / FasTrak / SunPass: toll records showing roadway use.
- Calendar entries: meeting locations, appointments, travel plans.
- Social media: geotagged posts, tagged photos, check-ins.
- Doctor and dentist appointments: location of medical care.
- Country club, gym, religious institution attendance: swipe records.
- Utility bills: proving you actually used the new-state home.
If you don't have a contemporaneous record, the auditor will reconstruct your year using all of the above. Their reconstruction wins unless yours is better-documented.
The two claims auditors typically make
- Statutory residency claim: you maintained an old-state abode AND spent 184+ days in the old state. Black-letter rule, easy to apply.
- Domicile claim: you never really changed domicile. Facts-and-circumstances test that's harder to apply but harder to defend without preparation.
The statutory-residency claim is decided by day count. The domicile claim is decided by ties, and ties are everything.
The four pillars of audit defense
- 1. Contemporaneous day-count log. Daily, dated, with location. Tax Days produces this. Reconstructions are far less credible.
- 2. Documented severance of old-state ties. Driver's license surrender date, voter-registration cancellation date, bank-account closures, insurance cancellations.
- 3. Documented establishment of new-state ties. Declaration of domicile (if FL), driver's license, voter registration, homestead exemption, doctors, dentists.
- 4. Family situation. Where the spouse and minor children live is heavily weighted. If they stayed in the old state, your defense is materially weaker.
Common audit traps
- Old-state cell phone billing address. Auditors pull this first.
- Old-state addresses on financial accounts. Brokerage, retirement, bank, update them all.
- Old-state country club, religious institution, professional memberships. Drop the ones you can.
- Old-state employer or business. If still relevant, formalize the fact that you work remotely from the new state.
- Frequent visits 'for the kids' or 'for parents.' Days add up. Track and limit.
Settlement vs. litigation
Most residency audits settle. Settlements typically involve giving back some days (e.g., conceding 5–15 disputed days) in exchange for closing the case at a lower assessment. Litigation is slow, expensive, and reserved for clear-record cases or principled disputes.
Track from day one
Audit defense is built before the audit. The day you sign your Declaration of Domicile (or surrender your old driver's license, or move) is the day to start your day-count log. Tax Days creates this log automatically and exports it on demand for your accountant or attorney.
Hire a tax attorney who specializes in state residency audits as soon as you receive the questionnaire. Don't try to handle a high-stakes audit alone, and don't volunteer information beyond what's requested.
Frequently asked questions
How likely is a residency audit after moving from a high-tax state?
For people who change residency from a high-tax state to a low-tax one, the odds are generally much higher than most expect: closer to 50%, and higher still for earners with income over $1M. New York, California, New Jersey, Connecticut, and Massachusetts all run aggressive residency-audit programs targeting departing residents.
How long does a state residency audit take?
Residency audits are slow. A residency questionnaire typically arrives 12 to 24 months after your move with 30 to 60 days to respond, follow-up requests and a proposed assessment can stretch to month 48, and appeals or settlement can run to month 60. A New York audit can take 3 to 5 years to resolve.
What evidence do residency auditors ask for?
Auditors typically request travel records (boarding passes, hotel receipts, rental car contracts), cell phone billing with location data, credit card and bank statements, toll records like EZ-Pass or SunPass, calendar entries, geotagged social media, medical appointment locations, club swipe records, and utility bills. If you don't have your own contemporaneous log, they reconstruct your year from these sources, and their reconstruction generally wins unless yours is better documented.
What are the two claims residency auditors typically make?
First, a statutory residency claim: that you maintained an abode in the old state and spent 184 or more days there, which is a black-letter rule decided by day count. Second, a domicile claim: that you never really changed your permanent home, which is a facts-and-circumstances test decided by your ties, family location, and documented severance from the old state.
Do residency audits usually settle or go to court?
Most residency audits settle. Settlements typically involve conceding some disputed days (often 5 to 15) in exchange for closing the case at a lower assessment, while litigation is slow, expensive, and generally reserved for clear-record cases or principled disputes. It's wise to hire a tax attorney who specializes in residency audits as soon as the questionnaire arrives.