Overall
- Santa Rosa-Petaluma
- 107.8
- Chicago-Naperville-Elgin
- 103.6
Diff -4.2 RPP
Santa Rosa-Petaluma vs Chicago-Naperville-Elgin
Cost of living comparison based on BEA Regional Price Parities. Chicago-Naperville-Elgin is 3.9% less expensive than Santa Rosa-Petaluma.
3.9% less expensive
Chicago-Naperville-Elgin, IL-IN is 3.9% less expensive than Santa Rosa-Petaluma, CA on BEA Regional Price Parities (overall RPP 103.6 vs 107.8). A $100,000 salary in Santa Rosa-Petaluma buys about the same as $96,114 in Chicago-Naperville-Elgin; the largest component gap is services.
- Overall RPP 107.8 (Santa Rosa-Petaluma) vs 103.6 (Chicago-Naperville-Elgin)
- $100k in Santa Rosa-Petaluma ≈ $96,114 purchasing power in Chicago-Naperville-Elgin
- Services drives the gap (-71.2 RPP points)
RPP parity plate
Pair CA:IL 107.8→103.6
TIER-NEAR · CROSS-STATE · SPLIT-BUDGET · BOTH-ABOVE · PP-SHIFT
- TIER-NEAR Near tier
- CROSS-STATE CA × IL
- 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
- Santa Rosa-Petaluma
- 105.2
- Chicago-Naperville-Elgin
- 107.3
Diff +2.1 RPP
Services
- Santa Rosa-Petaluma
- 154.8
Diff -71.2 RPP
Rents
- Santa Rosa-Petaluma
- 139.6
- Chicago-Naperville-Elgin
- 112.0
Diff -27.6 RPP
| Category | Santa Rosa-Petaluma | Chicago-Naperville-Elgin | Difference |
|---|---|---|---|
| Overall | 107.8 | 103.6 | -4.2 |
| Goods | 105.2 | 107.3 | +2.1 |
| Services | 154.8 | 83.6 | -71.2 |
| Rents | 139.6 | 112.0 | -27.6 |
Visual Comparison
Overall
Santa Rosa-Petaluma 107.8
Chicago-Naperville-Elgin 103.6
Goods
Santa Rosa-Petaluma 105.2
Chicago-Naperville-Elgin 107.3
Services
Santa Rosa-Petaluma 154.8
Chicago-Naperville-Elgin 83.6
Rents
Santa Rosa-Petaluma 139.6
Chicago-Naperville-Elgin 112.0
Vertical line = national average (100)
What This Comparison Actually Tells You
Services creates the largest separation: Chicago-Naperville-Elgin is 71.2 points lower. But goods move against the overall direction, so this is a split budget rather than a clean across-the-board winner.
Chicago-Naperville-Elgin, IL-IN is 3.9% less expensive than Santa Rosa-Petaluma, CA, 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 Santa Rosa-Petaluma to $96,114 in Chicago-Naperville-Elgin, but it is not a personal spending weight.
Santa Rosa-Petaluma
107.8
Cost Index
Chicago-Naperville-Elgin
103.6
Cost Index
Salary Equivalents
What a salary in Santa Rosa-Petaluma would need to be in Chicago-Naperville-Elgin for the same purchasing power:
| In Santa Rosa-Petaluma | In Chicago-Naperville-Elgin | Difference |
|---|---|---|
| $50,000 | $48,057 | $-1,943 |
| $75,000 | $72,085 | $-2,915 |
| $100,000 | $96,114 | $-3,886 |
| $150,000 | $144,170 | $-5,830 |
$ in Santa Rosa-Petaluma = in Chicago-Naperville-Elgin
Same BEA Regional Price Parity ratio as the table above (107.8 → 103.6), computed live from your number, nothing is sent anywhere.
How the Price Gap Changed
Santa Rosa-Petaluma and Chicago-Naperville-Elgin 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 | Santa Rosa-Petaluma RPP | Chicago-Naperville-Elgin RPP | Relative Gap |
|---|---|---|---|
| 2008 | 118.1 | 105.4 | 12.7 points Santa Rosa-Petaluma higher |
| 2012 | 112.3 | 105.1 | 7.2 points Santa Rosa-Petaluma higher |
| 2016 | 115.1 | 103.8 | 11.3 points Santa Rosa-Petaluma higher |
| 2020 | 111.4 | 104.5 | 6.9 points Santa Rosa-Petaluma higher |
| 2024 | 107.8 | 103.6 | 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 Chicago-Naperville-Elgin more expensive than Santa Rosa-Petaluma?
Chicago-Naperville-Elgin is 3.9% less expensive than Santa Rosa-Petaluma. The overall cost index is 103.6 vs 107.8 (national average = 100).
What salary in Chicago-Naperville-Elgin equals $100K in Santa Rosa-Petaluma?
A $100,000 salary in Santa Rosa-Petaluma has the same purchasing power as $96,114 in Chicago-Naperville-Elgin. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Santa Rosa-Petaluma and Chicago-Naperville-Elgin?
Rents in Santa Rosa-Petaluma are indexed at 139.6 while Chicago-Naperville-Elgin is at 112.0 (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.