Full-Time RVer Domicile: SD vs FL vs TX, Honestly Compared

Ask which state a full-timer should claim and the answer comes back as a tax table. South Dakota: no income tax. Texas: no income tax. Florida: no income tax. Three zeros, pick whichever, done.

That table is accurate and it is useless, because it compares the three states on the one dimension where they are identical. South Dakota, Texas, and Florida all rate 1 out of 5 on both audit aggressiveness and exit stickiness in ResidencyIQ’s dossiers, for the same reason in each case: none of them levies a personal income tax, so none of them runs a residency audit, and none of them will ever send anyone a document supporting your version of the year. On the thing you are choosing for, they are interchangeable.

The differences that actually exist sit somewhere else. They are in the bar you have to clear to get in, what it costs to bring a rig and a tow vehicle across the line, whether your coach needs a different class of license, what jury duty and voter rolls do to you afterward, and, most importantly, which of the three hands you a document that your former state has to argue with rather than simply ignore. Those differences are real, they are written down in statutes and on state forms, and almost none of them appear in the tax table.

This article is informational and is not legal or tax advice. Domicile is intensely factual, it interacts with the rules of whichever state you are leaving, and the right answer for a couple who sold a California house is not the right answer for someone who still owns one. Work through your own situation with a qualified CPA or tax attorney.

Start with the structural fact that reframes everything below, because it is the one most domicile comparisons skip.

None of these three states has a stake in your answer. Texas has barred a personal income tax outright by constitutional amendment since 2019. Florida has never had one under its current constitution. South Dakota’s Department of Revenue administers sales, use, and motor vehicle taxes and has no individual income tax return of any kind. Because none of them taxes your income, none of them audits your departure, and none of them audits your arrival either. There is no counterparty defending your position, and there is also no counterparty attacking it.

Every dollar of residency risk in an RV domicile arrangement therefore sits with the state you left. That state has an income tax, a revenue agency with subpoena power, and a rule that says its claim on you continues until you affirmatively establish a domicile somewhere else. Which state you picked matters to that agency only as evidence. It never matters as a defense.

This is why "which state is easiest" is the wrong opening question and "which state produces the best evidence for the fight I might actually have" is the right one. The easiest state to enter is not automatically the most persuasive one to have entered, and in one specific case, described below, the easiest state is one a person with a house back home cannot honestly enter at all.

South Dakota is the state RVers name first, and the reason is real. For someone with no fixed dwelling anywhere, the state offers an address exception rather than demanding a residential address it knows you do not have.

The mechanism is a one-page form, the State of South Dakota Residency Affidavit, revised May 2024. Its stated purpose is "your request for an exception of the proof of residency requirement for a Driver License and or Identification card." Two documents have to come with it. One is "a valid one-night stay receipt in South Dakota (no more than one year old) from a local RV Park, Campground or Hotel for proof of the temporary address where you are residing." The other is "a document (no more than one year old) proving your personal mailbox (PMB) service address," which can be a receipt from the mailbox business or a piece of mail carrying that address.

That is the famous one-night rule, and it is not folklore. It is on the state’s own form. A single documented night in a South Dakota campground, plus a mail service, plus a trip to a licensing office, and you leave with a South Dakota license.

Now read the part of the form that the shortcut version never quotes. The affidavit is signed under oath, and the applicant agrees to four statements: "I am a South Dakota resident, and I live in a RV/camper/hotel, or I travel full time for work." "South Dakota is my state of residence, and I will return after being absent." "I do not stay, live in, or maintain a residence in any another state." "My personal mailbox service (PMB) is a mail forwarding service, and not a virtual only mail service."

The third statement is the one that decides who South Dakota is actually for. A person who keeps a condo in Illinois, or a house they rent out but stay in for two months a summer, or a spare room at a property they still own in California, cannot sign that sentence truthfully. And this is not a soft attestation. The form carries an explicit perjury declaration: "I declare and affirm under the penalties of perjury (2 years imprisonment and $4000 fine) that this claim (petition, application, information) has been examined by me and, to the best of my knowledge and belief is in all things true and correct. Any false statement or concealment of any material facts subjects any license or ID issued to immediate cancellation." It must be signed in front of a notary or a South Dakota driver license examiner.

So South Dakota has the lowest physical bar and the narrowest eligibility. It is built for people who genuinely have no other home, and it asks them to swear to exactly that. For a true full-timer this is a feature, because a sworn statement of no other residence is a stronger piece of evidence against a former state’s claim than anything Texas or Florida hands out. For a part-timer who still keeps a place back home, it is not a shortcut. It is a false statement on a notarized state form.

Two more details from the same page, both of which people find out later. The form warns that "South Dakota Driver Licensing records are used as a supplemental list for jury duty selection" and that getting a South Dakota license or ID "will result in you being required to report for jury duty in South Dakota." And the second statement on the affidavit, that South Dakota is your state of residence and you will return after being absent, is not a formality either. The dossier flags the pattern where someone chooses South Dakota domicile and then never actually spends time in or near the state, which weakens the case if a former revenue agency argues the arrangement was a mail drop rather than a move.

On money, South Dakota is the mildest of the three on the way in. The state charges a 4 percent motor vehicle excise tax, and SDCL 32-5B-11 gives credit for excise or sales tax already paid to another state, with the applicant paying only the difference if South Dakota’s amount is higher. Vehicles get titled and registered at the county level, generally within 45 days of establishing residency, and the voter registration form has to reach the county auditor at least 15 days before an election, with no fax or email registration accepted. There is no vehicle safety inspection and no special license class for a private RV regardless of how big the coach is.

Texas is the oldest of the three RV domicile traditions, and the reason is partly institutional. The Escapees RV Club has been headquartered in Livingston, in Polk County, for decades, and the county offices there are used to processing people who arrive with a coach and a mail service address rather than a lease. Texas also has no residency affidavit of the South Dakota type. It expects documentary proof of a Texas address, which is what the mail service exists to supply.

The timing rules are statutory and they are not the same number, which trips people constantly. Transportation Code section 521.029 lets a new resident drive on an out-of-state license "for no more than 90 days after the date on which the person enters this state." Transportation Code section 502.040 gives a much shorter window for the vehicles themselves: "Not more than 30 days after purchasing a vehicle or becoming a resident of this state," the owner has to apply for registration. Ninety days for you, thirty for the rig.

The number that makes Texas genuinely cheaper is in the Tax Code. A Texan who buys a vehicle out of state and brings it home owes 6.25 percent of the sales price, less credit for tax paid elsewhere. A new resident who brings in a vehicle already registered in their own name in another state owes a flat $90 new resident tax instead, under Tax Code section 152.023, in lieu of the use tax. That $90 is payable to the county tax assessor-collector within 30 days of the vehicle’s first use in Texas, 60 days for active duty military. On a $200,000 diesel pusher, the difference between a flat $90 and a percentage-of-value use tax is not a rounding error, and it is the single largest hard-dollar variance among these three states.

Texas got cheaper again on January 1, 2025. Under House Bill 3297, non-commercial vehicles "no longer need a vehicle safety inspection prior to registration." The Department of Public Safety is explicit that the annual safety inspection is gone for private vehicles, that "all non-commercial vehicles in the state are still subject to a $7.50 inspection program replacement fee," and that emissions testing is a separate program that still applies in emissions counties such as Harris, Dallas, Travis, and El Paso. For a full-timer whose rig may not be anywhere near Texas at renewal time, losing the annual in-state inspection requirement removed the most awkward recurring obligation Texas imposed.

The offsetting cost is the license itself, and it is the one honest disadvantage Texas carries for big-rig owners. Texas classifies non-commercial licenses by weight. Transportation Code section 521.081 requires a Class A license to operate a vehicle with a gross vehicle weight rating of 26,001 pounds or more, or a combination rated 26,001 pounds or more where the towed vehicle is rated over 10,000 pounds. Section 521.082 requires a Class B for a single vehicle rated more than 26,000 pounds. These are non-commercial classes, so no CDL is involved and no commercial medical certificate applies, but they require a separate skills test in the actual rig. Neither South Dakota nor Florida imposes an equivalent non-commercial class on a privately used recreational vehicle; South Dakota exempts recreational vehicles used for personal or family recreational purposes from its commercial licensing chapter with no weight ceiling, and Florida’s standard class license covers a private RV of any size.

That is the trade in one line. Texas asks for the most steps and one real test, and charges the least to bring the rig.

Florida’s distinguishing feature is not tax and not cost. It is a filing that neither of the other two offers.

Florida Statutes section 222.17 lets a person who has established a Florida domicile file a sworn declaration of domicile in the office of the clerk of the circuit court for the county where they reside. It is signed under oath before an official authorized to take affidavits. It states where the person resides and in what county, declares bona fide residency, identifies a former residence, and lists any other places of abode maintained. Subsection (3) adds the sentence that matters for a person with more than one place to sleep: the declarant states that the Florida place of abode "constitutes his or her predominant and principal home."

Two things about that document deserve emphasis, in both directions. First, it is not required. Florida imposes no income tax, has no statutory day-count residency test, and runs no residency-factor audit, so nothing in Florida law makes you file it. Its entire value is external: it is a dated, sworn, publicly recorded statement of intent, created at a specific moment, that a former state’s auditor cannot pretend does not exist. A South Dakota affidavit is stronger on substance because of the no-other-residence clause, but it lives in a state licensing file. A Florida declaration is a recorded county instrument.

Second, and this is the part that gets oversold: a declaration is evidence, not a verdict. It does not bind New York or California, and standing alone it changes nothing, which is why the dossier for Florida lists it among the things people over-rely on. Section 222.17 also runs the other way. Subsection (4) lets a person domiciled outside Florida file a declaration stating that their domicile is in that other state, that they intend to maintain it permanently, and disclosing what property or activities they have in Florida. That reverse filing exists precisely because the document is about proving intent to somebody else.

Florida is the most expensive of the three to enter and to hold. A nonresident who takes employment or enrolls a child in public school has 30 days to get a Florida license under section 322.031. Section 320.072 imposes a $225 initial registration fee on the first application to register a vehicle when the owner has no Florida plate in their name to transfer, which is exactly the position a new arrival is in. And insurance is the recurring line item. ValuePenguin’s 2026 state figures put average full-coverage auto premiums at $311 a month in Florida, $247 in Texas, and $196 in South Dakota, against a national average of $208, so Florida runs roughly $115 a month above South Dakota on an ordinary vehicle policy. Those are auto averages rather than full-timer RV policies, which are underwritten differently, but the state ranking they reflect shows up in RV quotes too.

One Florida rule works strongly in a full-timer’s favor and is worth knowing before you time the move. Under section 212.06(8), items purchased and used in another state for six months or longer before being brought into Florida are not subject to Florida use tax, and the Department of Revenue applies that to motor vehicles: a vehicle used outside Florida for six months or more is presumed to have been purchased for use outside the state, and with documentation of that use, no Florida use tax is due. A rig you have already been living in for a year comes in clean. A rig you buy two months before establishing Florida domicile does not.

The last Florida item applies only to the minority of full-timers who own dirt, a pad, or a park model. If you claim the Florida homestead exemption and later stop occupying the property as your principal residence, Fla. Stat. section 196.161 exposes you to back taxes, a 50 percent penalty, and 15 percent annual interest, and county property appraisers actively cross-check homestead claims against driver license records, voter rolls, and out-of-state tax filings. Texas runs a narrower version of the same play. Under Tax Code section 11.43(h), a chief appraiser who learns of any reason indicating that a previously allowed exemption should be canceled investigates, cancels it, and delivers written notice within five days, and under section 11.43(i) an exemption erroneously allowed in any one of the five preceding years is added back to the appraisal roll as escaped property under section 25.21. Section 11.13(h) is explicit that a person may not receive a residence homestead exemption for more than one residence homestead in the same year. A homestead exemption is not a neutral piece of paper. It is a sworn claim that a specific property is your principal residence, and it is the single most common way a two-address arrangement contradicts itself in writing.

Set the three side by side on the dimensions that actually differ.

Bar to entry. South Dakota is the lowest by a wide margin, one documented overnight stay plus a mail service, but it is gated by a sworn statement that you maintain no residence in any other state. Texas and Florida both want documentary proof of an address, which a mail service supplies, and neither asks you to swear you have no home elsewhere.

Cost to bring the rig in. Texas wins outright, and not narrowly: a flat $90 new resident tax under Tax Code section 152.023 in place of 6.25 percent use tax. South Dakota charges 4 percent excise with credit for tax already paid elsewhere, so a rig that carried full tax in a 6 percent state usually comes in at zero. Florida charges no use tax on a vehicle used outside the state for six months or more under section 212.06(8), but adds the $225 initial registration fee under section 320.072.

Recurring cost. South Dakota is cheapest on insurance, Florida is the most expensive of the three and among the most expensive in the country, Texas sits in between and slightly above the national average. Texas removed its annual safety inspection for private vehicles on January 1, 2025, leaving a $7.50 fee at registration and emissions testing only in designated counties.

License class for a big coach. Texas is the only one of the three that will make you take a skills test in the rig, under Transportation Code sections 521.081 and 521.082, once you cross 26,000 pounds. South Dakota and Florida do not impose a comparable non-commercial class on a private RV.

Evidence value against your old state. This is the ranking that inverts the usual one. South Dakota’s affidavit is the strongest single sentence any of the three produces, because "I do not stay, live in, or maintain a residence in any another state" is exactly the fact a former state’s auditor is trying to disprove, sworn under penalty of perjury on a state form. Florida’s recorded declaration of domicile under section 222.17 is the most formal and the most durable as a public record. Texas produces the weakest paper trail of the three, a license and a registration and nothing that states intent, which is why Texas domicile cases lean hardest on the underlying pattern of behavior.

Obligations that follow. South Dakota tells you on the affidavit itself that the license puts you in the jury pool. All three put you on voter rolls, which is the first list a former state cross-checks.

If you want to work through your own facts rather than a table, the domicile state chooser for RVers walks the questions that actually separate these three, including the ones about whether you still keep a place in the state you are leaving, which is the answer that eliminates South Dakota for a large share of people who assumed it was their obvious pick.

Every paragraph above is about the destination. The case, if there is one, is about the origin, and the origin state applies its own rule to the days you did not spend in South Dakota, Texas, or Florida.

California is the sharpest version. Revenue and Taxation Code section 17014(a) makes a resident "every individual who is in this state for other than a temporary or transitory purpose," and also every individual domiciled in California who is outside it for a temporary or transitory purpose. Section 17016 presumes residency for anyone who spends more than nine months of the taxable year in California, rebuttable only with satisfactory evidence of a temporary or transitory purpose. For an RVer this is a live risk in a way it is not for someone who sold a house and left, because a coach that spends winters near family in the Central Valley accumulates California days without anyone deciding anything. The dossiers rate California 5 out of 5 on both audit aggressiveness and exit stickiness, the Franchise Tax Board has four years to assess a filed return, and R&TC section 19057(a) leaves no statute of limitations at all where no return was filed for a year the FTB believes you were a resident. Full-timers moving from California to Texas or moving from California to Florida inherit that four-year window on the departure year, and the departure year is the one where the file has to be strongest.

Illinois runs a quieter version of the same test with a trap specific to people who keep property. Under 35 ILCS 5/1501(a)(20)(A) a resident is someone in Illinois for other than a temporary or transitory purpose, or domiciled in Illinois and absent for a temporary or transitory purpose, with no day-count threshold and no permanent-place-of-abode prong. In place of a bright line, 86 Ill. Adm. Code 100.3020(f) supplies rebuttable presumptions, and one of them is aimed squarely at a two-address life: an individual receiving a homestead exemption on Illinois property under 35 ILCS 200/15-175 is presumed to be an Illinois resident. Another presumes an Illinois resident stays one the following year "if he or she is present in Illinois more days than he or she is present in any other state," which is a genuinely awkward standard for someone who moves constantly and may not have a plurality of days anywhere. The presumptions can be overcome only by clear and convincing evidence. Someone moving from Illinois to Texas who leaves the General Homestead Exemption in place on an Illinois property has handed the Department of Revenue a presumption instead of just a fact.

New York adds the mechanic that punishes casual day counting. New York taxes as a statutory resident anyone who spends more than 183 days in the state while maintaining a permanent place of abode there for substantially all of the year, and under its regulation, presence in New York for any part of a calendar day counts as a full day. Three hours to see a doctor is a day. A full-timer who parks near family for a stretch each year accumulates those days faster than intuition suggests.

The pattern across all three origin states is the same. None of them asks whether South Dakota, Texas, or Florida accepted you. They ask where you actually were, what you actually kept, and what you can actually show.

The evidence problem for a full-timer is the inverse of everyone else’s. A person who moves from one house to another has utility accounts, a lease, and a mortgage that quietly document a year. A person living in a coach has almost none of that, and the records that do exist are the ones nobody thinks to keep.

Keep the entry documents themselves. The dated campground receipt behind a South Dakota affidavit, the notarized affidavit, the recorded Florida declaration with its clerk stamp, the county tax assessor-collector receipt for the Texas $90 new resident tax. These are the only documents in the whole arrangement that fix a date, and they are the ones a former state will want to see first.

Count days by state as they happen, not by reconstruction. Day counting is harder for a full-timer than for anyone else because there is no single second home to anchor a narrative, and easier to capture because the movement itself generates a continuous location record if you retain it. Reconstructing a year of stops from memory two years later is not a record; it is testimony.

Do not leave a homestead exemption behind. It is the one document in a normal person’s life that formally asserts a principal residence, and Florida, Texas, and Illinois all cross-check it against license and voter records. If you still own property in the state you are leaving, removing the exemption is not paperwork hygiene. It is removing the strongest written statement against your own position.

Be honest about which of the three you qualify for. A person who still keeps a place in another state cannot sign South Dakota’s affidavit, and the honest version of that constraint is not a loss. It means the underlying facts are a dual-home case rather than a full-timer case, and dual-home cases are won with day counts and severed ties, not with a license from an easy state.

And build the file while the year is happening. Every one of these documents is cheap to capture on the day it exists and impossible to manufacture afterward.

The Mobility Map records days and nights across states as they happen, measured against each jurisdiction’s own day-count threshold, which for a full-timer is the single hardest thing to reconstruct and the easiest to capture while it is being lived. Evidence Vault holds the campground receipts, affidavits, recorded declarations, registration records, and insurance documents that turn a claimed domicile into a demonstrated one. AuditIQ surfaces thin days and retained-tie exposure in the states you actually spend time in, and advisor sharing lets a CPA or tax attorney review the chronology and the underlying documents directly.

ResidencyIQ organizes records and highlights potential exposure factors. It is not a law firm or an accounting firm and does not provide legal or tax advice; work with a qualified CPA or tax attorney on your own domicile, filings, and state exposure.

State of South Dakota Residency Affidavit (South Dakota Department of Public Safety, revised 05/2024) is the source of the form’s stated purpose as a request for an exception to the proof of residency requirement, the requirement of a one-night stay receipt no more than one year old from a local RV park, campground, or hotel, the personal mailbox (PMB) service address document requirement, the four sworn statements quoted here including "I do not stay, live in, or maintain a residence in any another state," the perjury declaration and its 2 years imprisonment and $4,000 fine language, the requirement that the form be signed before a notary or a South Dakota driver license examiner, and the notice that South Dakota driver licensing records are used as a supplemental jury duty list: https://www.sd.gov/sys_attachment.do?sys_id=556dcdcd47902a50854b61d2e16d43d5.

Texas Transportation Code section 521.029 is the source of the 90-day period during which a new Texas resident may operate on a license issued by their previous state: https://codes.findlaw.com/tx/transportation-code/transp-sect-521-029/. Texas Transportation Code section 502.040 is the source of the rule that registration must be applied for not more than 30 days after purchasing a vehicle or becoming a Texas resident: https://law.justia.com/codes/texas/transportation-code/title-7/subtitle-a/chapter-502/subchapter-b/section-502-040/. Texas Transportation Code section 521.081 is the source of the Class A weight thresholds (26,001 pounds, and combinations where the towed vehicle exceeds 10,000 pounds) and section 521.082 of the Class B threshold for a single vehicle over 26,000 pounds: https://law.justia.com/codes/texas/transportation-code/title-7/subtitle-b/chapter-521/subchapter-d/section-521-081/.

Texas Comptroller of Public Accounts, Motor Vehicle Tax Guidebook (publication 96-254), new resident tax, is the source of the $90 new resident tax due in lieu of use tax on a vehicle previously registered in the new resident’s name in another state or country, the 6.25 percent use tax it replaces, the 30-day payment window (60 days for active duty military), and payment to the county tax assessor-collector at titling or registration under Tax Code section 152.023: https://comptroller.texas.gov/taxes/publications/96-254/new-resident-tax.php.

Texas Department of Public Safety, Vehicle Safety Inspection Program Changes Now in Effect, is the source of the January 1, 2025 end of safety inspections for non-commercial vehicles under House Bill 3297, the $7.50 inspection program replacement fee, and the point that emissions testing is a separate requirement that still applies in emissions counties: https://www.dps.texas.gov/news/vehicle-safety-inspection-program-changes-now-effect.

Florida Statutes section 222.17 is the source of the declaration of domicile mechanics described here: filing with the clerk of the circuit court, the oath requirement, the contents of the declaration, subsection (3)’s "predominant and principal home" statement for a person maintaining more than one place of abode, and subsection (4)’s reverse declaration for a person domiciled outside Florida who maintains a Florida place of abode: https://www.flsenate.gov/Laws/Statutes/2024/222.17.

Florida Statutes section 322.031 is the source of the 30-day window in which a nonresident who accepts employment or enrolls a child in public school must obtain a Florida driver license: https://law.justia.com/codes/florida/title-xxiii/chapter-322/section-322-031/. Florida Department of Highway Safety and Motor Vehicles procedure RS-30 is the source of the $225 initial registration fee imposed by section 320.072 on an initial application to register a vehicle where the owner has no Florida plate to transfer: https://www.flhsmv.gov/pdf/proc/rs/rs-30.pdf.

Florida Department of Revenue, Sales and Use Tax on Motor Vehicles (GT-800030), is the source of the rule under section 212.06(8), Florida Statutes, that items purchased and used in another state for six months or longer before being brought into Florida are not subject to Florida use tax, and of its application to motor vehicles documented as used outside Florida for six months or more: https://floridarevenue.com/Forms_library/current/brochure/gt800030.pdf.

South Dakota Codified Laws chapter 32-5B is the source of the 4 percent motor vehicle excise tax and of section 32-5B-11’s credit for excise or sales tax paid to another state, with the applicant paying the difference where South Dakota’s amount is greater: https://law.justia.com/codes/south-dakota/title-32/chapter-05b/. South Dakota Codified Laws chapter 32-12A is the source of the exemption of recreational vehicles used for personal or family recreational purposes from commercial driver licensing: https://law.justia.com/codes/south-dakota/title-32/chapter-12a/.

Escapees RV Club, "Do You Need A Special License To Drive An RV? State By State Requirements," is the source for the state-by-state comparison point that Texas imposes non-commercial Class A and Class B requirements above 26,000 pounds while Florida imposes no special license or endorsement for a private RV of any size: https://www.escapees.com/blog/do-you-need-a-special-license-to-drive-an-rv-state-by-state-requirements.

ValuePenguin, State of Auto Insurance in 2026, is the source of the average full-coverage premium figures quoted here: $311 a month in Florida, $247 in Texas, $196 in South Dakota, against a $208 national average: https://www.valuepenguin.com/state-of-auto-insurance-2026.

California Revenue and Taxation Code section 17014 is the source of the two-part resident definition and its "temporary or transitory purpose" language: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=RTC&sectionNum=17014. Section 17016 is the source of the nine-month presumption and the means of rebutting it: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=RTC&sectionNum=17016.

The Illinois resident definition at 35 ILCS 5/1501(a)(20)(A), the rebuttable presumptions at 86 Ill. Adm. Code 100.3020(f) including the homestead exemption presumption tied to 35 ILCS 200/15-175 and the more-days-in-Illinois-than-any-other-state presumption, and the clear and convincing standard for rebutting them, together with the South Dakota, Texas, and Florida audit aggressiveness and exit stickiness ratings, the Texas constitutional income tax ban, the South Dakota 45-day vehicle registration window and 15-day voter registration deadline, the New York any-part-of-a-day rule and 183-day statutory residency test, the California four-year assessment period and the R&TC section 19057(a) unlimited period for unfiled returns, and the Florida (section 196.161) and Texas (Tax Code sections 11.13(h), 11.43(h), and 11.43(i)) homestead cross-check exposures come from ResidencyIQ’s own dossier research, with underlying citations on the South Dakota, Texas, Florida, and California residency guides.