Residency rules, sticky taxes, and first-year steps (2026)
2026.1 Edition · Revised 2026-07-25 · DomusDay Research
The move changes the rate; the record decides whether it sticks. Colorado keeps taxing until domicile actually changes — domicile — the place a person considers their home; the permanent place of abode to which they intend to return whenever away, with no fixed day threshold to hide behind. Below: what follows leavers, and the Wyoming steps that build the record.
At Colorado's top marginal rate (4.4%), every $100,000 of taxable income is $4,400 of state tax — an illustration at the top bracket, not an effective-rate calculation. Official rate tables are linked below.
Wyoming does not possess an individual or corporate income tax, and the state preempts the field: no county, city, town, or other political subdivision may impose, levy, or collect a tax based on wages or other income. There is no Wyoming return and no Wyoming residency test for income tax.
Source ↗The exemption covers 25% of the first $1,000,000 of an owner-occupied home's fair market value. From tax year 2026 the claimant has to reside on the property not less than eight months of the year, attested by affidavit to the county assessor, with a service-member exception.
Source ↗Wyoming allows one year from the time residency is established to be issued a Wyoming driver license — a longer window than most states. The former state's examiner, however, reads the license date as evidence, so a late conversion leaves a gap in the arrival record.
Source ↗Wyoming is the easy half. Colorado decides whether the move counts, and it decides on evidence — the two tests below stay live until the record closes them out.
The full rules, the audit program, and every source: the complete Leaving Colorado guide →
The headline delta: Colorado taxes its top bracket at 4.4% while Wyoming has no personal income tax. At the top marginal rate — an illustration, not an effective-rate calculation — every $100,000 of taxable income is $4,400 of state tax that stops accruing once Colorado residency actually ends. The rules above decide when that is; the day count and the domicile record decide whether it holds up.
The first weeks in Wyoming matter more than they look: each step below produces a dated document, and dated documents are what answer a Colorado examiner years later. Do them early and the record starts on your side of the timeline.
A new resident has one year from the time residency is established to be issued a Wyoming driver license, applied for in person at a driver services office.
Source ↗Wyoming titles and lien filings are processed through the county clerk in the county of residence, and registrations and license plates through the county treasurer.
Source ↗Voter registration requires being a bona fide resident of Wyoming for not less than 30 days before the next election, with registration in person at the county clerk or by mail with notarized documentation.
Source ↗Wyoming's own list of residency proofs is a useful arrival checklist: a utility bill, bank statement, or pay stub dated within 90 days, or a residential lease, property tax bill, or vehicle registration dated within a year.
Source ↗Wyoming has no declaration-of-domicile instrument to record. The license, the county title and registration, the voter record, and the residential affidavit are the dated evidence a former state's examiner will read.
Source ↗The owner-occupied residential exemption removes 25% of the first $1,000,000 of fair market value from the property tax base; the claim is an affidavit submitted to the county assessor attesting to residence in the home, and from tax year 2026 residence of not less than eight months of the year is required.
Source ↗The Property Tax Refund Program is a separate income-qualified refund administered by the Department of Revenue alongside the county exemption.
Source ↗Banking, payroll, and advisory relationships moved to Wyoming addresses generate dated records that the departure state weighs when reading where daily life sits.
Medical and professional relationships established in Wyoming create dated, located records for the arrival side of the departure state's analysis.
The inbound move of household goods and vehicles produces dated invoices naming Wyoming as the destination.
There is no Wyoming individual income tax return, so the arrival year produces a part-year or nonresident filing in the departure state only — Wyoming contributes no residency start date of its own to an income tax record.
Source ↗Everything Wyoming asks of a new resident, on its own plate: the Moving to Wyoming guide →
Every rule on this page traces to a statute, regulation, or agency publication, listed in full on each state's own plate.
Neither. Wyoming does not possess an individual or corporate income tax, and no county, city, or town may levy one — the state preempts the field. There is no Wyoming income tax return, so capital gains realized after the move meet no state rate here.
Wyoming publishes its own list for voter registration: a Wyoming driver's license or ID, a utility bill, bank statement, or pay stub dated within 90 days, or a residential lease, property tax bill, or vehicle registration dated within a year. Voting itself requires being a bona fide resident for at least 30 days before the election.
A 25% exemption on the first $1,000,000 of fair market value for an owner-occupied single-family residence, claimed by affidavit with the county assessor. From tax year 2026 the claimant has to reside on the property at least eight months of the year, with an exception where active duty service prevented meeting the count.
2026.1 Edition · Revised 2026-07-25 · DomusDay Research