Idaho's cost of living index is 99.4 — 0.6% below the US average of 100 (MERIC (C2ER index), Second Quarter 2026). The index averages the cities that take part in the survey, so it describes those areas rather than the whole state. Compare purchasing power and equivalent salaries across states.
CoL Index
99.4
US avg = 100 · MERIC (C2ER index), Second Quarter 2026
vs. National Avg
-0.6%
Less expensive
Median Income
$81,166
Median household · Census ACS 2024 1-year
Equiv. at US Avg
$81,656
Same purchasing power
| CoL Index | 99.4 | MERIC (C2ER index), Second Quarter 2026 — composite, US avg = 100 |
| vs. National | 0.6% | Below average cost |
| Median Household Income | $81,166 | Idaho median — Census ACS 2024 1-year |
| National Purchasing Power | $81,656 | Equivalent $ at US avg CoL |
| Overall Category | Moderate | CalcHub band of the index: Low < 90 ≤ Moderate < 100 ≤ High < 115 ≤ Very High |
| Population | 2,029,733 | Census Bureau estimate, July 1, 2025 |
With a cost of living index of 99.4, Idaho is roughly on par with the national average. Lower costs in Idaho mean your dollar goes further. A salary of $81,166 in Idaho provides the equivalent purchasing power of $81,656 in a state at the national average.
Housing is typically the largest driver of cost of living differences between states.Idaho's typical home value of $478,700 is well above the U.S. typical value of $368,700 (Zillow Home Value Index, August 2026). Other factors include state income tax (5.3% top rate in Idaho), sales tax (6% state rate), and property taxes (0.43% effective rate).
