Almost everything written about RV domicile makes the same mistake: it treats “where do I live?” as one question with one answer. It is four questions with four answers, and they can legitimately point at different states at the same time.
You can be domiciled in Florida for income tax, registered in Florida for your vehicle, garaged in Arizona for insurance rating, and still be tax-resident in California because you spent too many days there and never severed your ties. Nothing about that arrangement is unusual, and only one part of it is likely to cause trouble.
Sorting out which parts matter is the whole exercise. The three-state shortlist that dominates this topic — South Dakota, Texas, Florida — is the answer to one of the four questions, and only sometimes the right answer to that one.
Verify before you act. State requirements for licensing, registration, inspection and taxation change, and published summaries of them are frequently out of date or simply wrong. Everything below is a starting point for questions, not a substitute for the state’s own guidance. For anything with tax consequences, use a CPA or attorney who works with itinerant clients. Information current as of August 2026.
The four tests, and why they diverge
Test 1: Domicile (tax and legal)
Domicile is your one true legal home — the place you intend to return to. Unlike residence, you can only have one, and here is the part that catches people: your old domicile persists until you affirmatively establish a new one. Leaving is not enough. Selling the house is not enough. A state that believes you never properly left retains a claim on your income.
Courts and revenue departments assess domicile on the totality of your conduct: where you vote, bank, register vehicles, keep professional and medical relationships, hold memberships, receive mail, own property, and where your stated intent is documented. No single act is decisive, and the assessment is retrospective.
Test 2: Vehicle registration and titling
Registration is about the vehicle, not you. It is generally driven by where the vehicle is principally kept and by your domicile state’s rules, and it determines your plates, your registration fees, your annual inspection obligation, and in some states an annual vehicle property tax.
Registration and domicile usually align, and they should. The main reason they come apart is a deliberate attempt to separate them — which is what the Montana LLC discussion below is about, and why it has become a considerably worse idea than it was five years ago. The mechanics of weight classes, licence classes and fee bands are covered separately in RV and trailer registration: weight classes, licences and fees.
Test 3: Voter registration
Legally the narrowest test, evidentially the loudest. Voter registration is a formal declaration of where you consider yourself to live, made under penalty of perjury, and it is the first thing a revenue department looks at when domicile is disputed. Registering to vote in your new state, and cancelling in the old one, is one of the cheapest and strongest pieces of evidence available.
Test 4: Insurance domicile and garaging address
Insurers rate on a garaging address — where the vehicle is normally kept. For a full-timer that address is usually the domicile address, often a mail-forwarding service. Carriers know this and most of the RV specialists accommodate it, but ordinary auto carriers frequently do not, and some will not write a policy at all against a mail service address.
This test matters more than its profile suggests. Rates vary enormously by garaging state, and a carrier that discovers the stated garaging address bears no relationship to where the vehicle actually sits has grounds to dispute a claim. If the vehicle is also a custom or converted build, the classification questions stack on top of this one — see insuring a custom or converted vehicle.
The fifth test nobody lists: statutory residency
Domicile is not the only way a state can tax you. Many states also apply a statutory residency rule, which taxes anyone who maintains a place of abode in the state and is present for more than a set number of days — commonly 183, though the threshold and the definition of a qualifying day vary.
This matters to full-timers in one specific scenario: the traveller who is properly domiciled in South Dakota but spends seven months a year parked on a relative’s property in a high-tax state, using a room in the house. That can be enough to create a second, parallel tax residency on facts entirely separate from domicile. The mitigations are ordinary and boring — stay in the rig, keep the days below the threshold, and keep a dated log. Doing none of them and assuming the plates settle the question is how people end up filing in two states.
The three default states, assessed honestly
South Dakota, Texas and Florida dominate for four reasons: no state income tax, government agencies that accept mail-forwarding addresses, established mail services headquartered there, and generally moderate vehicle costs. Beyond that, they are not interchangeable.
South Dakota has the lowest barrier to entry by a wide margin. Establishing residency historically requires evidence of a single night’s stay in the state — a campground or motel receipt — plus the mail service paperwork and an in-person visit to a county office. No vehicle inspection, no special RV licence below the usual weight thresholds, five-year licence renewals, and vehicle registration costs that are modest by national standards. It is the pragmatic choice for people whose connection to the state is purely administrative.
Texas demands more. Vehicle registration and, historically, inspection requirements are more involved, and Texas requires a non-commercial Class A or B licence for heavier rigs — a genuine additional step for anyone in a large Class A or towing a heavy fifth wheel. In exchange you get a very large state with real infrastructure, an established RV club and mail service ecosystem, and no income tax.
Florida is the choice for people who actually spend winters there. It has no income tax, accepts mail forwarding, does not require a special licence for personal-use RVs at typical weights, and has a formal declaration of domicile instrument that makes intent easy to document. Vehicle registration costs run higher than South Dakota’s, and insurance rates in parts of the state are among the highest in the country — which matters if the vehicle is garaged there in fact as well as on paper.
The honest advice, which the mail services themselves give: start from where you actually return to. If you spend five months a year near family in Arizona, Arizona may be your domicile whatever your plates say, and pretending otherwise is the situation that generates assessments. The three-state shortlist is for people with no anchor, not for people trying to escape one.
The Montana LLC question, in 2026
For years the standard move on an expensive motorhome was to form a Montana LLC, title the vehicle to it, and pay no sales tax, because Montana has no general sales tax. On a $250,000 coach in a state with a 6% rate, that is $15,000 avoided in an afternoon.
The legal position has not changed: the structure itself is not unlawful, and there are taxpayers for whom it is entirely compliant. What has changed is enforcement, and it has changed sharply.
Your home state’s claim was always the use tax — the tax owed when property is brought into the state and used there. States argued for decades that a vehicle garaged and driven in-state owes use tax regardless of where it is titled. They simply could not find the vehicles. Automated licence plate readers, dealer records, insurance data and interagency data sharing have solved that problem.
The recent record is not subtle. Colorado obtained misdemeanor tax evasion convictions against a group of RV-owning residents and pursued civil action against more than a hundred others, recovering millions in unpaid tax, penalties and interest. Utah’s penalty structure has run to the full back tax plus a further 100% penalty. Tennessee brought felony evasion charges in a widely reported case in late 2025. In February 2026 the California Attorney General filed a multi-count felony complaint against fourteen defendants — including a dealership executive — alleging conspiracy, tax fraud, perjury and money laundering around Montana LLC registrations, and in March 2026 California’s tax administration and DMV jointly announced an investigation programme targeting dealers who facilitate the practice, citing annual losses above $10 million.
The practical read: the arrangement is defensible when the facts support it, and indefensible when they do not. A genuine itinerant with no fixed state of use is in a different position from someone whose coach sits in a driveway in Sacramento eleven months a year. The difference between those two people is not the paperwork. It is the location data, and the location data now exists.
There is also an insurance dimension that gets less attention. A policy written against an ownership structure and garaging address that do not reflect reality is a policy with a live misrepresentation problem attached, which is a bad thing to discover during a total loss claim.
State reference table
How to read this. The licence column shows what is commonly reported for personal-use recreational vehicles, and it is the least reliable data in this category — published sources disagree with each other, and several disagree with the state agencies themselves. Treat it as a prompt to check, not as an answer. Standard weight thresholds are 26,000 lb GVWR for a single vehicle and 26,000 lb GCWR for a combination unless noted. “Income tax” refers to tax on wage and salary income only.
| State | Income tax on wages | Special licence commonly cited for heavy RVs | Notes |
|---|---|---|---|
| Alabama | Yes | Standard licence commonly sufficient | |
| Alaska | No | Standard licence commonly sufficient | Practical difficulties as a domicile for lower-48 travellers |
| Arizona | Yes | Standard licence commonly sufficient | Flat-rate income tax |
| Arkansas | Yes | CDL commonly cited above 26,000 lb | Verify with state police / DFA |
| California | Yes | Non-commercial Class B above 26,000 lb or over 40 ft; non-commercial Class A for heavy trailers | Highest-scrutiny state on out-of-state registration |
| Colorado | Yes | Standard licence commonly sufficient | Active enforcement history on out-of-state LLC registrations |
| Connecticut | Yes | CDL commonly cited above 26,000 lb | Annual vehicle property tax commonly applies |
| Delaware | Yes | Non-commercial class may apply above 26,000 lb | No state sales tax |
| Florida | No | Standard licence for personal-use RVs | Declaration of domicile available; accepts mail forwarding; established mail services |
| Georgia | Yes | Non-commercial Class A cited for heavy trailers | |
| Hawaii | Yes | CDL commonly cited above 26,000 lb | Impractical as an RV domicile |
| Idaho | Yes | Standard licence commonly sufficient | |
| Illinois | Yes | Non-commercial Class B cited from 16,001 lb | Lower threshold than most states |
| Indiana | Yes | Standard licence commonly sufficient | |
| Iowa | Yes | Standard licence commonly sufficient | |
| Kansas | Yes | CDL commonly cited above 26,000 lb | Annual vehicle property tax commonly applies |
| Kentucky | Yes | Standard licence commonly sufficient | |
| Louisiana | Yes | Standard licence commonly sufficient | High combined sales tax on vehicle purchase |
| Maine | Yes | Standard licence commonly sufficient | |
| Maryland | Yes | Non-commercial Class B above 26,000 lb | |
| Massachusetts | Yes | Standard licence commonly sufficient | |
| Michigan | Yes | Recreational Double “R” endorsement for fifth wheel plus second trailer | Unusual endorsement; catches boat and toy haulers |
| Minnesota | Yes | Standard licence commonly sufficient | |
| Mississippi | Yes | Standard licence commonly sufficient | Annual vehicle property tax commonly applies |
| Missouri | Yes | Standard licence commonly sufficient | Annual vehicle property tax commonly applies |
| Montana | Yes | Standard licence commonly sufficient | No general sales tax; see enforcement section above |
| Nebraska | Yes | Standard licence commonly sufficient | |
| Nevada | No | Non-commercial class cited above 26,000 lb | High vehicle registration costs relative to peers |
| New Hampshire | No | Standard licence commonly sufficient | Interest and dividends tax repealed from 2025; no general sales tax |
| New Jersey | Yes | Standard licence commonly sufficient | |
| New Mexico | Yes | CDL commonly cited above 26,000 lb | |
| New York | Yes | “R” endorsement on Class D above 26,000 lb | |
| North Carolina | Yes | Non-commercial Class A/B above 26,000 lb | Annual vehicle property tax commonly applies |
| North Dakota | Yes | Standard licence commonly sufficient | |
| Ohio | Yes | Standard licence commonly sufficient | |
| Oklahoma | Yes | Standard licence commonly sufficient | |
| Oregon | Yes | Standard licence commonly sufficient | No general sales tax |
| Pennsylvania | Yes | Non-commercial class above 26,000 lb | |
| Rhode Island | Yes | Standard licence commonly sufficient | |
| South Carolina | Yes | Non-commercial class above 26,000 lb | Annual vehicle property tax commonly applies |
| South Dakota | No | Standard licence commonly sufficient | Lowest entry barrier; single lodging receipt historically accepted; five-year licence term |
| Tennessee | No | Standard licence commonly sufficient | Recent felony enforcement on out-of-state registration |
| Texas | No | Non-commercial Class A or B above 26,000 lb | Established mail service ecosystem; more registration steps than SD |
| Utah | Yes | Standard licence commonly sufficient | Severe penalty structure on evaded use tax |
| Vermont | Yes | Standard licence commonly sufficient | Historically straightforward for converted-vehicle titling |
| Virginia | Yes | Standard licence commonly sufficient | Annual vehicle property tax commonly applies |
| Washington | No | Standard licence commonly sufficient | Capital gains excise tax applies; no wage income tax |
| Washington DC | Yes | CDL commonly cited above 26,000 lb | |
| West Virginia | Yes | Standard licence commonly sufficient | Annual vehicle property tax commonly applies |
| Wisconsin | Yes | CDL commonly cited above 26,000 lb | |
| Wyoming | No | Non-commercial class above 26,000 lb | Active enforcement on out-of-state registration since 2019 |
How to change domicile, in the order that actually works
Sequence matters, because each step is evidence and the evidence should be consistent.
- Decide honestly where your anchor is. If there is one, that is your answer. If there genuinely is not, choose from the shortlist on cost and convenience.
- Establish a physical address. A mail-forwarding service with a street address, not a PO box. State agencies vary on what they accept; the established RV mail services exist because they have solved this specifically.
- Sever ties with the old state. Close or relocate bank accounts where practical, cancel voter registration, resign memberships tied to the old address, file a final part-year return, and — critically — do not retain a residence available for your use unless you can explain why.
- Visit in person. Obtain the driver’s licence. Most states require an in-person appearance and some require proof of a stay.
- Register the vehicles in the new state, in your name.
- Register to vote, and then actually vote.
- Update everything else: insurance garaging address, health insurance (this one has real consequences and is frequently overlooked — networks are geographic), bank and brokerage addresses, professional licences, wills and powers of attorney, passport, IRS address.
- File a declaration of domicile where the state offers one, and keep a copy.
- Keep a day log. If you spend significant time in a high-tax state, a contemporaneous record of nights by state is the difference between a conversation and an assessment.
What actually triggers a challenge
Revenue departments do not audit itinerants at random. The triggers are patterns:
- A sudden drop to zero on a previously substantial state return, with no corresponding move of employment
- Continued property ownership or a lease in the old state
- Dependants in school in the old state
- Employment income sourced to the old state
- Consistent physical presence detected through employment, medical or vehicle records
- A high-value vehicle titled to an out-of-state entity while consistently located in-state
The defence in every case is the same and has to be built in advance: a coherent set of facts pointing at one state, documented at the time.
The mail-forwarding address problem
The mail service address is the load-bearing element of the whole structure, and it has known weak points. Some banks and lenders decline commercial mail-receiving addresses. Some insurers will not rate against them. Jury summonses, court notices and time-limited government correspondence arrive on a delay that you have to manage. And a handful of agencies have periodically tightened what they accept.
None of this is disqualifying — tens of thousands of full-timers operate this way — but it does mean the address needs to be with an established service that handles this specific use case, not the cheapest virtual mailbox available.
If you are working through the full financial picture of going full-time rather than just the legal mechanics, the recurring costs are itemised in full-time RV living: the costs dealers don’t itemise, and the ownership side in the five-year cost of RV ownership in 2026.
Frequently asked questions
What is the difference between residency and domicile? You can have several residences — anywhere you actually live for a time. You have exactly one domicile, the place you intend as your permanent home and to which you intend to return. Tax obligations generally follow domicile, but states can also tax you as a statutory resident based purely on days present, which is why both matter.
Is South Dakota really the easiest state for RV domicile? By entry barrier, generally yes. Evidence of one night’s stay, mail service paperwork and a county office visit has historically been sufficient, with no inspection requirement and a long licence term. Whether it is the right state depends on where you actually spend your time.
Can I use a PO box as my domicile address? No. State agencies require a physical street address for licensing, registration and voter registration. Mail-forwarding services provide exactly this, which is why they exist in this market.
Will my old state come after me? Only if the facts give it a reason. High-tax states with sophisticated revenue departments do pursue disputed domicile, and the burden of showing you established a new one falls on you. Documented, consistent conduct is the answer; a change of address alone is not.
Do I need to be in my domicile state to renew my licence? It varies. Some states allow online or mail renewal for several cycles; others require periodic in-person appearance. Renewal terms are one of the more practical differences between the shortlist states.
Does my domicile state affect my insurance premium? Materially. Carriers rate on garaging address, and the spread between states is large. It also affects which carriers will write you at all, since not all will accept a mail service address as a garaging location.
What about health insurance as a full-timer? This is the most commonly underestimated consequence of the choice. Marketplace plans are geographically networked, and a plan bought in your domicile state may provide only emergency coverage elsewhere. Investigate national-network or specialist options before you commit to a state, not after.
Is a Montana LLC still worth considering? For a genuinely itinerant owner with no state of principal use, it can be legitimate. For an owner whose vehicle spends most of the year in one taxing state, the enforcement environment in 2026 makes it a poor risk, and the potential penalties substantially exceed the tax avoided. Take advice from a tax professional on your specific facts rather than from a registration agent selling the service.