Colorado vs Idaho cost of living in 2026. Where you save and where you do not.

Home prices. The gap depends on where in Colorado you start.

Coming from the Denver metro, the gap is real: at the October 2026 detached median of $645,000 (DMAR) against Ada County's $575,000 (Boise Regional REALTORS), a buyer with 20% down at 7.18% (Freddie Mac, week of November 5, 2026) pays about $380 a month less in principal and interest in the Boise area ($3,496 versus $3,116). Over five years that is roughly $22,800.

Coming from elsewhere in Colorado, there may be no housing savings at all. Colorado's statewide single family median was $575,000 in September 2026, the same as Ada County (Colorado Association of REALTORS), and Colorado Springs was lower at $484,700. On Redfin's all home types measure, Colorado was $540,846 and Idaho $493,582 in September 2026.

Payment math assumes 20% down on the median price at a 7.18% 30 year fixed rate (Freddie Mac PMMS, week of November 5, 2026) over 360 months, principal and interest only. Actual rates, terms, and qualification depend on your financial profile and the lender's pricing at application. Consult a licensed Mortgage Loan Originator (NMLS) for personalized advice.

Income tax. Colorado is lower, and it may change.

Colorado's 4.4% applies to federal taxable income with Colorado adjustments (Colorado Legislative Council). Idaho applies 5.3% to taxable income above $4,811 for single filers and $9,622 for joint filers (Idaho State Tax Commission, 2025 schedule; the 2026 rate is unchanged). The difference is a few hundred dollars a year for most households, not thousands.

The 2026 ballot. As of November 4, 2026, Amendment 87, a graduated income tax starting in 2027, was too close to call, with Yes narrowly ahead in unofficial returns. Proposition 136, which would have capped the rate at 4.4%, was trailing. Proposition NN, which lets the state keep revenue above its TABOR limit for schools, was ahead and expected to pass, which would reduce future TABOR refunds. Colorado paid no TABOR refund for tax year 2026. Results are unofficial until certified. If Amendment 87 is certified, Colorado's rates from 2027 would be 3.7% up to $25,000, 4.2% to $100,000, 4.4% to $500,000, then 7.4%, 7.9%, and 8.4% above $1 million (2026 Blue Book). We will update this page when results are certified.

Sales tax and groceries.

Colorado's state sales tax is only 2.9%, but local taxes stack on top. The average combined rate is 7.89% (Tax Foundation, January 2026), and Denver's combined rate is 9.15% (Denver Treasury). Idaho's average is 6.03%. Colorado and Denver do not tax food for home use. Idaho taxes groceries at 6% and returns $155 per person a year through the grocery credit (Idaho State Tax Commission). For two people, the $310 credit equals the tax on about $5,170 of groceries; above that, Idaho costs more on food.

Property tax and metro districts.

Colorado's state auditor counted 2,509 metropolitan districts as of October 2025, up from about 1,000 in 2006, planning to collect about $1.2 billion in property tax in 2026 (Colorado Office of the State Auditor, October 2026). The tax depends on the specific district, so ask for the full mill levy on any Colorado home you are comparing. In Idaho, ask whether a newer subdivision sits in a Community Infrastructure District, and file the homeowner's exemption by the last county business day of December (Idaho Code §63-602G). Our Idaho property tax guide covers both.

Cars. Registration, emissions, and insurance.

How we got $165. Colorado's Specific Ownership Tax uses 85% of the original price and a rate that falls with age: 0.45% in years 5 through 9 (Colorado DMV; Legislative Council issue brief, November 2025). That is $95.63 on a $25,000 car. Add the road safety surcharge ($19.30), bridge safety surcharge ($18.00), an age fee ($12), a weight based base fee (about $9 for a 3,500 pound car), and about $12 of small county and program fees. Your actual bill depends on weight and county; the Colorado DMV fee estimator gives the exact figure. Idaho's fee is $57 for a 3 to 6 year old car plus a county fee of about $21 in Ada County (Idaho Transportation Department).

Emissions. Gas vehicles in Denver, Boulder, Broomfield, Douglas, and Jefferson counties, and parts of Adams, Arapahoe, Larimer, and Weld, need a test every two years once they are past their first 7 model years. The test costs $35 (Air Care Colorado). Idaho ended its Treasure Valley program on July 1, 2023 (Idaho DEQ).

Insurance. Experian's 2026 full coverage average was $2,712 in Colorado and $1,577 in Idaho (Experian). NerdWallet's median quotes were $3,283 and $1,999 (NerdWallet). Both put Idaho about $1,100 to $1,300 a year lower per full coverage policy.

Gas and electricity.

Gas is the one daily cost that runs higher in Idaho. Colorado's state tax is 22 cents a gallon plus a 6 cent road usage fee for July 2026 through June 2027 (Colorado DOR), against Idaho's 33 cents. On November 5, 2026, regular averaged $4.05 in Colorado and $4.44 in Idaho (AAA). At 600 gallons a year, that is about $234 more in Idaho.

Electricity goes the other way. Residential power averaged 17.17 cents per kWh in Colorado and 13.37 cents in Idaho in August 2026 (EIA, preliminary), about $38 less in Idaho for every 1,000 kWh you use.

Wages. The part that can cancel the savings.

Colorado pays more. The median wage was $59,800 in Colorado and $47,970 in Idaho in May 2025 (BLS), and median household income in 2025 was $107,733 in the Denver metro versus $92,877 in the Boise metro (Census ACS 2025). If you keep a Colorado paycheck through remote work, Idaho's lower prices are pure savings. If you will take an Idaho job, compare offers in your field before you count on them.

Snow and elevation.

Boise is also slightly warmer and drier on average: a mean annual temperature of 53.2°F and 11.51 inches of precipitation, versus 51.3°F and 15.36 inches in Denver (NOAA climate normals, 1991 to 2020; NWS Boulder).

A worked example. Denver metro to the Boise area.

Yearly difference, Denver metro to the Boise area

For this household the move saves roughly $4,800 to $5,000 a year before electricity and groceries, mostly from the house payment and insurance. A household moving from Colorado Springs or another lower cost Colorado market may save little or nothing on housing. The free Relocation Audit runs this with your own numbers.

Worked example figures are illustrative and depend on filing status, deductions, vehicles, coverage, usage, lender pricing, and the specific property. Consult a CPA for tax projections and a licensed Mortgage Loan Originator (NMLS) for loan structuring.

When this move doesn't pencil.

1. Your income is tied to Colorado. A Colorado wage that does not move with you can erase the savings. Compare the gross paycheck first.
2. You are leaving a lower priced Colorado market. Statewide, Colorado's single family median matches Ada County's, so housing may not get cheaper.
3. You are a high earner. At today's flat rates, Idaho's income tax is higher. That could reverse from 2027 if Amendment 87 is certified, because its top rates of 7.4% to 8.4% apply above $500,000.

Good News Realty Group is committed to the principles of the Fair Housing Act. We do not discriminate based on race, color, religion, national origin, sex, familial status, disability, or any other protected class. All buyers are free to consider any neighborhood, price point, or property. Equal Housing Opportunity.