Boulder vs Idaho Falls for Retirees (2026)
Scroll down for retirement income tax breakdown, healthcare estimates, and FAQ.
Full retirement cost breakdown
| Metric | Boulder Colorado | Idaho Falls Idaho |
|---|---|---|
| 1BR rent / month | $2,300 | $1,100Better |
| Median home price | $800K | $310KBetter |
| State income tax | 4.4%Better | 5.8% |
| Sales tax (combined) | 8% | 6%Better |
| Monthly utilities | $138Better | $142 |
| Groceries index (US = 100) | 109 | 96Better |
| Est. healthcare / month | $660 | $435Better |
| Walk score (0–100) | 52 / 100Better | 18 / 100 |
| Overall COL index (100 = US avg) | 132 | 87Better |
Frequently asked questions
Which city is better for retirement — Boulder or Idaho Falls?
Boulder and Idaho Falls are closely matched for retirees. Housing costs, tax burden, and overall affordability are similar. Your specific priorities — climate, walkability, family proximity — should guide the decision.
Is retirement income taxed in Boulder or Idaho Falls?
Boulder has the lower state income tax rate (4.4% vs 5.8%). Note that many states exempt Social Security income and some pension income from state taxes even when other income is taxed — check your specific state's retirement tax rules.
What is the estimated monthly healthcare cost in Boulder vs Idaho Falls?
Based on national average retiree healthcare spending (~$500/month) scaled by each city's cost-of-living index, estimated monthly healthcare costs are approximately $660 in Boulder and $435 in Idaho Falls. That's a difference of ~$225/month, or ~$2,700/year. Actual costs vary based on your Medicare plan, supplements, and health needs.
Can I afford to retire in Boulder on a $50,000 annual income?
On a $50,000/year ($4,167/month) retirement income in Boulder, rent alone would consume approximately 55% of your budget (1BR rent ~$2,300/mo) and healthcare another ~16%. That leaves roughly 29% (~$1,208/mo) for groceries, transportation, and other expenses. This is tight — a studio apartment or lower-cost neighborhood would help.
Which city is more walkable for retirees?
Boulder has a higher walk score (52 vs 18 out of 100). Walkability is increasingly important for retirees who want to reduce car dependence — a score above 70 means most daily errands can be done on foot. Boulder offers more independence without a car, which also reduces transportation costs.
$50K/year in Boulder has the same purchasing power as $33K/year in Idaho Falls
Healthcare estimates based on national avg retiree spending (~$500/mo) scaled by COL index · State income tax rates from Tax Foundation · Data: Zillow, BLS, Numbeo · Q1 2026