How many days can you spend in Colorado before you’re a resident?

The rule in Colorado

Colorado treats you as a resident if you are domiciled there, or if you maintain a permanent place of abode in Colorado and spend more than six months of the tax year there in total. The statute is phrased in months and does not specify how a partial day counts.

Two people can have the same permanent home in another state and get different answers, purely on days. Keeping the count below the line, and being able to prove it, is the entire game.

Source: law.cornell.edu

How long do you have to live in Colorado to be considered a resident?

Two ways. You become a Colorado resident the day you make it your domicile, however few days you have spent there. Or, even with a permanent home elsewhere, you are treated as a resident once you reach more than six months in Colorado in a single year while keeping a place to live there. The second route is the one that catches people by surprise.

Colorado residency requirements for taxes

Colorado looks at domicile first, then at days. Domicile is where your permanent home is, judged on the facts below. On top of that, the day-count rule above can make you a resident regardless of domicile.

• Where your permanent home is, and where you spend more of your nights
• Driver’s licence, vehicle registration, and voter registration
• Where your spouse, children, and pets live and go to school
• Where your doctor, dentist, accountant, and bank are
• Where the things you would not want to lose are kept
• Day counts, which are the one factor the state can verify independently

What counts as a day

In most states any part of a day spent in the state counts as a full day, including the day you arrive and the day you leave. Layovers and driving through can count too. A few states exempt time in transit or days spent in a hospital, but the safe assumption is that if you were there at any point, the day counts.

The count is per calendar year and resets on January 1. Days do not have to be consecutive.

How Colorado checks

The burden of proof is on you, not the state. In a residency audit the state asks for the records that show where you physically were, day by day:

• Mobile phone location and call records
• Credit and debit card transactions
• Flight itineraries, toll records, and parking receipts
• Calendar entries, social media posts, and photos with location data

Gaps in your records are usually resolved against you. A day you cannot place somewhere else is a day the state can argue you spent inside it.

Keep the proof automatically

Other states