Rapid City vs Idaho Falls for Retirees (2026)
Scroll down for retirement income tax breakdown, healthcare estimates, and FAQ.
Full retirement cost breakdown
| Metric | Rapid City South Dakota | Idaho Falls Idaho |
|---|---|---|
| 1BR rent / month | $1,200 | $1,100Better |
| Median home price | $285KBetter | $310K |
| State income tax | NoneBetter | 5.8% |
| Sales tax (combined) | 6.4% | 6%Better |
| Monthly utilities | $148 | $142Better |
| Groceries index (US = 100) | 96Better | 96 |
| Est. healthcare / month | $440 | $435Better |
| Walk score (0–100) | 22 / 100Better | 18 / 100 |
| Overall COL index (100 = US avg) | 88 | 87Better |
Frequently asked questions
Which city is better for retirement — Rapid City or Idaho Falls?
Based on home prices, taxes on retirement income, walkability, and overall cost of living, Rapid City scores better for retirees. Median home prices are $285K in Rapid City vs $310K in Idaho Falls. Idaho Falls is approximately 1% cheaper overall. The best choice still depends on climate, healthcare access, and proximity to family.
Is retirement income taxed in Rapid City or Idaho Falls?
South Dakota has no state income tax, meaning Social Security, pension, and retirement account withdrawals are not subject to state tax. Idaho has a 5.8% state income tax rate. For retirees, this difference can save thousands annually.
What is the estimated monthly healthcare cost in Rapid City 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 $440 in Rapid City and $435 in Idaho Falls. That's a difference of ~$5/month, or ~$60/year. Actual costs vary based on your Medicare plan, supplements, and health needs.
Can I afford to retire in Rapid City on a $50,000 annual income?
On a $50,000/year ($4,167/month) retirement income in Rapid City, rent alone would consume approximately 29% of your budget (1BR rent ~$1,200/mo) and healthcare another ~11%. That leaves roughly 60% (~$2,500/mo) for groceries, transportation, and other expenses. This is generally considered manageable.
Which city is more walkable for retirees?
Rapid City has a higher walk score (22 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. Rapid City offers more independence without a car, which also reduces transportation costs.
$50K/year in Rapid City has the same purchasing power as $49K/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