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Colorado 183-Day Rule Checker
Colorado has no bright-line day-count residency test. Here is what actually controls, and what a day count does and does not prove.
Colorado's actual test
Under Colorado Department of Revenue Rule 39-22-103(8)(a), a natural person is a Colorado resident if either domiciled in Colorado or the person satisfies the six-month rule: maintaining a permanent place of abode in Colorado and spending, in the aggregate, more than six months of the tax year in Colorado. A permanent place of abode is any place a person has a possessory right to live, including a leased apartment or an employer-paid apartment the person actually pays for and returns to on days off; a motel room or an RV camp lot without hookups generally does not qualify.
Presumptions
The place where a person currently lives is presumed to be their current domicile, and once domicile is established it is presumed to continue. Spouses are presumed to share a domicile until separated. A person who lives in a motorhome and owns no real property elsewhere is treated as a full-year Colorado domiciliary if their permanent ties are here and they spend more aggregate time in Colorado than anywhere else; conversely, someone who owns a home in another state but travels to Colorado seasonally is not treated as a Colorado domiciliary absent other factors.
Domicile controls instead
Colorado's domicile rule defines domicile as a place of abode combined with the present intention of returning after any absence, regardless of how long the absence lasts. A person can have only one domicile at a time (with a narrow exception for genuine seasonal dual-domicile arrangements), domicile continues until affirmatively changed, and the burden of proving a change rests on the person asserting it. The regulation lists 18 non-exclusive indicia the Department weighs, including prior domicile, length of time in the new place, spouse/dependent location, driver's license and vehicle registration jurisdiction, voter registration, employment location, government benefits received, mailing address for financial documents, professional licenses, prior-year filing positions, and even social media statements of residency; no single factor controls.
Methodology and sources
The threshold, presumption, and rule text shown here come directly from Colorado's researched dossier, reviewed against 13 primary sources including Colorado Department of Revenue, Taxation Division. This is general information, not tax or legal advice.
183-Day Rule Checker
Check your day count against Colorado's actual rule.
Domicile controls
No statutory day-count test applies
Days counted
0
This jurisdiction does not run a bright-line day-count residency test. Domicile, the place you treat as your true, fixed, permanent home, controls instead, regardless of how many days you spend here.
Colorado's actual test
Under Colorado Department of Revenue Rule 39-22-103(8)(a), a natural person is a Colorado resident if either domiciled in Colorado or the person satisfies the six-month rule: maintaining a permanent place of abode in Colorado and spending, in the aggregate, more than six months of the tax year in Colorado. A permanent place of abode is any place a person has a possessory right to live, including a leased apartment or an employer-paid apartment the person actually pays for and returns to on days off; a motel room or an RV camp lot without hookups generally does not qualify.
Presumptions
The place where a person currently lives is presumed to be their current domicile, and once domicile is established it is presumed to continue. Spouses are presumed to share a domicile until separated. A person who lives in a motorhome and owns no real property elsewhere is treated as a full-year Colorado domiciliary if their permanent ties are here and they spend more aggregate time in Colorado than anywhere else; conversely, someone who owns a home in another state but travels to Colorado seasonally is not treated as a Colorado domiciliary absent other factors.
General information based on published dossier research, not tax or legal advice. Consult a qualified advisor before relying on a day count for a filing position.
Colorado Day-Count FAQ
Does Colorado use the 183-day rule?+
Not exactly as codified. Colorado's six-month rule under Department Rule 39-22-103(8)(a) makes you a statutory resident if you keep a permanent place of abode in Colorado and spend more than six months (commonly treated as 183-plus days) here in the aggregate during the year, separate from and in addition to the ordinary domicile test.
I bought a place in Aspen but I'm domiciled in Texas. Do I owe Colorado tax?+
Not from domicile alone, since a person who owns a home in another state but visits Colorado seasonally isn't treated as a Colorado domiciliary absent other factors. But the ski home is a permanent place of abode, so if your aggregate Colorado days exceed six months in a year, the separate statutory six-month rule makes you a Colorado resident regardless of your Texas domicile.
How long do I have to register my car and get a Colorado driver's license after moving here?+
Vehicle registration is due within 90 days of establishing Colorado residency under the Colorado Registration Fairness Act; missing it triggers back taxes and late fees dating to the law's 2023 effective date. Colorado residency for driver's license purposes is established by living here 90 consecutive days, being gainfully employed here, or operating a business here.
Can I register to vote in Colorado on Election Day if I just moved?+
Yes. Colorado allows registration in person at a voter service and polling center through Election Day itself, in addition to standard online and mail registration, so a late-arriving move doesn't lock you out of voting.
If I keep a house empty in Colorado after I move out, does that create a permanent place of abode?+
Colorado's six-month rule turns on maintaining a permanent place of abode and spending more than six months here, so an empty Colorado house you still have a right to occupy can qualify as that abode if you also rack up enough days in the state. Renting it out to unrelated tenants where you keep no right to occupy it, and don't use it as your mailing address, generally takes it out of the permanent-place-of-abode category.
Read the full Colorado residency guide
Day count is one part of the picture. The full guide covers domicile, exit audit risk, the establishment checklist, tax profile, and special situations for Colorado.
Open the Colorado residency guideCheck another jurisdiction
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