San Diego vs Boulder for Retirees (2026)
Scroll down for retirement income tax breakdown, healthcare estimates, and FAQ.
Full retirement cost breakdown
| Metric | San Diego California | Boulder Colorado |
|---|---|---|
| 1BR rent / month | $2,600 | $2,300Better |
| Median home price | $850K | $800KBetter |
| State income tax | 9.3% | 4.4%Better |
| Sales tax (combined) | 7.8%Better | 8% |
| Monthly utilities | $130Better | $138 |
| Groceries index (US = 100) | 109Better | 109 |
| Est. healthcare / month | $740 | $660Better |
| Walk score (0–100) | 51 / 100 | 52 / 100Better |
| Overall COL index (100 = US avg) | 148 | 132Better |
Frequently asked questions
Which city is better for retirement — San Diego or Boulder?
Based on home prices, taxes on retirement income, walkability, and overall cost of living, Boulder scores better for retirees. Median home prices are $850K in San Diego vs $800K in Boulder. Boulder is approximately 11% cheaper overall. The best choice still depends on climate, healthcare access, and proximity to family.
Is retirement income taxed in San Diego or Boulder?
Boulder has the lower state income tax rate (4.4% vs 9.3%). 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 San Diego vs Boulder?
Based on national average retiree healthcare spending (~$500/month) scaled by each city's cost-of-living index, estimated monthly healthcare costs are approximately $740 in San Diego and $660 in Boulder. That's a difference of ~$80/month, or ~$960/year. Actual costs vary based on your Medicare plan, supplements, and health needs.
Can I afford to retire in San Diego on a $50,000 annual income?
On a $50,000/year ($4,167/month) retirement income in San Diego, rent alone would consume approximately 62% of your budget (1BR rent ~$2,600/mo) and healthcare another ~18%. That leaves roughly 20% (~$833/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 51 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 San Diego has the same purchasing power as $45K/year in Boulder
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