Overall
- Chicago-Naperville-Elgin
- 103.6
- Santa Rosa-Petaluma
- 107.8
Diff +4.2 RPP
Chicago-Naperville-Elgin vs Santa Rosa-Petaluma
Cost of living comparison based on BEA Regional Price Parities. Santa Rosa-Petaluma is 4% more expensive than Chicago-Naperville-Elgin.
4% more expensive
Santa Rosa-Petaluma, CA is 4% more expensive than Chicago-Naperville-Elgin, IL-IN on BEA Regional Price Parities (overall RPP 107.8 vs 103.6). A $100,000 salary in Chicago-Naperville-Elgin buys about the same as $104,044 in Santa Rosa-Petaluma; the largest component gap is services.
- Overall RPP 103.6 (Chicago-Naperville-Elgin) vs 107.8 (Santa Rosa-Petaluma)
- $100k in Chicago-Naperville-Elgin ≈ $104,044 purchasing power in Santa Rosa-Petaluma
- Services drives the gap (+71.2 RPP points)
RPP parity plate
Pair IL:CA 103.6→107.8
TIER-NEAR · CROSS-STATE · SPLIT-BUDGET · BOTH-ABOVE · PP-SHIFT
- TIER-NEAR Near tier
- CROSS-STATE IL × CA
- SPLIT-BUDGET Split budget
- BOTH-ABOVE Both above 100
- PP-SHIFT PP shift
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.
Category Breakdown
Goods
- Chicago-Naperville-Elgin
- 107.3
- Santa Rosa-Petaluma
- 105.2
Diff -2.1 RPP
Services
- Santa Rosa-Petaluma
- 154.8
Diff +71.2 RPP
Rents
- Chicago-Naperville-Elgin
- 112.0
- Santa Rosa-Petaluma
- 139.6
Diff +27.6 RPP
| Category | Chicago-Naperville-Elgin | Santa Rosa-Petaluma | Difference |
|---|---|---|---|
| Overall | 103.6 | 107.8 | +4.2 |
| Goods | 107.3 | 105.2 | -2.1 |
| Services | 83.6 | 154.8 | +71.2 |
| Rents | 112.0 | 139.6 | +27.6 |
Visual Comparison
Overall
Chicago-Naperville-Elgin 103.6
Santa Rosa-Petaluma 107.8
Goods
Chicago-Naperville-Elgin 107.3
Santa Rosa-Petaluma 105.2
Services
Chicago-Naperville-Elgin 83.6
Santa Rosa-Petaluma 154.8
Rents
Chicago-Naperville-Elgin 112.0
Santa Rosa-Petaluma 139.6
Vertical line = national average (100)
What This Comparison Actually Tells You
Services creates the largest separation: Santa Rosa-Petaluma is 71.2 points higher. But goods move against the overall direction, so this is a split budget rather than a clean across-the-board winner.
Santa Rosa-Petaluma, CA is 4% more expensive than Chicago-Naperville-Elgin, IL-IN, a meaningful but not extreme shift. The move decision turns on which budget category creates the 4.2-point overall gap.
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.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
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 Chicago-Naperville-Elgin to $104,044 in Santa Rosa-Petaluma, but it is not a personal spending weight.
Chicago-Naperville-Elgin
103.6
Cost Index
Santa Rosa-Petaluma
107.8
Cost Index
Salary Equivalents
What a salary in Chicago-Naperville-Elgin would need to be in Santa Rosa-Petaluma for the same purchasing power:
| In Chicago-Naperville-Elgin | In Santa Rosa-Petaluma | Difference |
|---|---|---|
| $50,000 | $52,022 | +$2,022 |
| $75,000 | $78,033 | +$3,033 |
| $100,000 | $104,044 | +$4,044 |
| $150,000 | $156,065 | +$6,065 |
$ in Chicago-Naperville-Elgin = in Santa Rosa-Petaluma
Same BEA Regional Price Parity ratio as the table above (103.6 → 107.8), computed live from your number, nothing is sent anywhere.
How the Price Gap Changed
Chicago-Naperville-Elgin and Santa Rosa-Petaluma share 17 published annual releases from 2008 through 2024. Their overall gap narrowed, moving from 12.7 to 4.2 RPP points. Santa Rosa-Petaluma remained the higher-index metro in the latest release.
Services changed the most within this pair: its gap moved 51.3 points between the first and latest shared releases (19.9 to 71.2 points). This describes a relative price-index history, not a forecast or a household budget.
| Release Year | Chicago-Naperville-Elgin RPP | Santa Rosa-Petaluma RPP | Relative Gap |
|---|---|---|---|
| 2008 | 105.4 | 118.1 | 12.7 points Santa Rosa-Petaluma higher |
| 2012 | 105.1 | 112.3 | 7.2 points Santa Rosa-Petaluma higher |
| 2016 | 103.8 | 115.1 | 11.3 points Santa Rosa-Petaluma higher |
| 2020 | 104.5 | 111.4 | 6.9 points Santa Rosa-Petaluma higher |
| 2024 | 103.6 | 107.8 | 4.2 points Santa Rosa-Petaluma higher |
Annual BEA Regional Price Parity releases; a higher index means a higher price level relative to the national average of 100. Selected years shown from the full shared series.
Frequently Asked Questions
Is Santa Rosa-Petaluma more expensive than Chicago-Naperville-Elgin?
Santa Rosa-Petaluma is 4% more expensive than Chicago-Naperville-Elgin. The overall cost index is 107.8 vs 103.6 (national average = 100).
What salary in Santa Rosa-Petaluma equals $100K in Chicago-Naperville-Elgin?
A $100,000 salary in Chicago-Naperville-Elgin has the same purchasing power as $104,044 in Santa Rosa-Petaluma. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Chicago-Naperville-Elgin and Santa Rosa-Petaluma?
Rents in Chicago-Naperville-Elgin are indexed at 112.0 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.