Overall
- Kahului-Wailuku
- 109.4
- Santa Rosa-Petaluma
- 107.8
Diff -1.6 RPP
Kahului-Wailuku vs Santa Rosa-Petaluma
Cost of living comparison based on BEA Regional Price Parities. Santa Rosa-Petaluma is 1.5% less expensive than Kahului-Wailuku.
1.5% less expensive
Santa Rosa-Petaluma, CA is 1.5% less expensive than Kahului-Wailuku, HI on BEA Regional Price Parities (overall RPP 107.8 vs 109.4). A $100,000 salary in Kahului-Wailuku buys about the same as $98,529 in Santa Rosa-Petaluma; the largest component gap is services.
- Overall RPP 109.4 (Kahului-Wailuku) vs 107.8 (Santa Rosa-Petaluma)
- $100k in Kahului-Wailuku ≈ $98,529 purchasing power in Santa Rosa-Petaluma
- Services drives the gap (-35.8 RPP points)
RPP parity plate
Pair HI:CA 109.4→107.8
PHOTO-FINISH · CROSS-STATE · SPLIT-BUDGET · BOTH-ABOVE · PP-PAR
- PHOTO-FINISH Photo finish
- CROSS-STATE HI × CA
- SPLIT-BUDGET Split budget
- BOTH-ABOVE Both above 100
- PP-PAR PP near-par
Instrument codes from this pair's BEA Regional Price Parities (overall · goods · services · rents · national benchmark 100 · purchasing-power conversion), not a ranking or recommendation.
Kahului-Wailuku
109.4
Cost Index
Santa Rosa-Petaluma
107.8
Cost Index
What This Comparison Actually Tells You
Kahului-Wailuku, HI and Santa Rosa-Petaluma, CA are a photo finish on overall price level, only 1.6 RPP points apart. A salary conversion is therefore a fine adjustment, not evidence of a fundamentally different cost regime.
Services creates the largest separation: Santa Rosa-Petaluma is 35.8 points lower. But rents move against the overall direction, so this is a split budget rather than a clean across-the-board winner.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
Both metros exceed the U.S. benchmark of 100. The choice is between two national premiums, so local wages need to clear the higher baseline in either market.
For a service-heavy household, test childcare, health, and other locally supplied costs before relying on rent alone. The BEA ratio converts $100,000 in Kahului-Wailuku to $98,529 in Santa Rosa-Petaluma, but it is not a personal spending weight.
Category Breakdown
Goods
- Kahului-Wailuku
- 111.6
- Santa Rosa-Petaluma
- 105.2
Diff -6.4 RPP
Services
- Kahului-Wailuku
- 190.6
- Santa Rosa-Petaluma
- 154.8
Diff -35.8 RPP
Rents
- Kahului-Wailuku
- 119.2
- Santa Rosa-Petaluma
- 139.6
Diff +20.4 RPP
| Category | Kahului-Wailuku | Santa Rosa-Petaluma | Difference |
|---|---|---|---|
| Overall | 109.4 | 107.8 | -1.6 |
| Goods | 111.6 | 105.2 | -6.4 |
| Services | 190.6 | 154.8 | -35.8 |
| Rents | 119.2 | 139.6 | +20.4 |
Visual Comparison
Overall
Kahului-Wailuku 109.4
Santa Rosa-Petaluma 107.8
Goods
Kahului-Wailuku 111.6
Santa Rosa-Petaluma 105.2
Services
Kahului-Wailuku 190.6
Santa Rosa-Petaluma 154.8
Rents
Kahului-Wailuku 119.2
Santa Rosa-Petaluma 139.6
Vertical line = national average (100)
Salary Equivalents
What a salary in Kahului-Wailuku would need to be in Santa Rosa-Petaluma for the same purchasing power:
| In Kahului-Wailuku | In Santa Rosa-Petaluma | Difference |
|---|---|---|
| $50,000 | $49,265 | $-735 |
| $75,000 | $73,897 | $-1,103 |
| $100,000 | $98,529 | $-1,471 |
| $150,000 | $147,794 | $-2,206 |
$ in Kahului-Wailuku = in Santa Rosa-Petaluma
Same BEA Regional Price Parity ratio as the table above (109.4 → 107.8), computed live from your number, nothing is sent anywhere.
Frequently Asked Questions
Is Santa Rosa-Petaluma more expensive than Kahului-Wailuku?
Santa Rosa-Petaluma is 1.5% less expensive than Kahului-Wailuku. The overall cost index is 107.8 vs 109.4 (national average = 100).
What salary in Santa Rosa-Petaluma equals $100K in Kahului-Wailuku?
A $100,000 salary in Kahului-Wailuku has the same purchasing power as $98,529 in Santa Rosa-Petaluma. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Kahului-Wailuku and Santa Rosa-Petaluma?
Rents in Kahului-Wailuku are indexed at 119.2 while Santa Rosa-Petaluma is at 139.6 (national average = 100). Santa Rosa-Petaluma has higher rents.
Data sources
- BEA Regional Price Parities (RPP), the cost-of-living indices shown on this page
- U.S. Census Bureau, American Community Survey (ACS), gross-rent observations behind the rents component
- BLS Consumer Price Index (CPI), goods and services price relatives
- BLS Occupational Employment and Wage Statistics (OEWS), labor-driven services component
- HUD Fair Market Rents (FMR), 40th-percentile rent cross-reference
Every figure on PlainCost is rendered directly from BEA Regional Price Parity source data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, our changelog, or report a data error. Data current as of 2026-08-11. Rankings measure the published cost-of-living index only; we don't recommend where to live or rate any metro's quality of life.