Overall
- Chicago-Naperville-Elgin
- 103.6
- Sioux Falls
- 90.6
Diff -13.0 RPP
Chicago-Naperville-Elgin vs Sioux Falls
Cost of living comparison based on BEA Regional Price Parities. Sioux Falls is 12.5% less expensive than Chicago-Naperville-Elgin.
12.5% less expensive
Sioux Falls, SD-MN is 12.5% less expensive than Chicago-Naperville-Elgin, IL-IN on BEA Regional Price Parities (overall RPP 90.6 vs 103.6). A $100,000 salary in Chicago-Naperville-Elgin buys about the same as $87,486 in Sioux Falls; the largest component gap is rents.
- Overall RPP 103.6 (Chicago-Naperville-Elgin) vs 90.6 (Sioux Falls)
- $100k in Chicago-Naperville-Elgin ≈ $87,486 purchasing power in Sioux Falls
- Rents drives the gap (-34.4 RPP points)
RPP parity plate
Pair IL:SD 103.6→90.6
TIER-GAP · CROSS-STATE · RENT-LED · BENCH-CROSS · PP-SHIFT
- TIER-GAP Clear tier gap
- CROSS-STATE IL × SD
- RENT-LED Rent-led gap
- BENCH-CROSS Benchmark cross
- 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.
Salary Equivalents
What a salary in Chicago-Naperville-Elgin would need to be in Sioux Falls for the same purchasing power:
| In Chicago-Naperville-Elgin | In Sioux Falls | Difference |
|---|---|---|
| $50,000 | $43,743 | $-6,257 |
| $75,000 | $65,614 | $-9,386 |
| $100,000 | $87,486 | $-12,514 |
| $150,000 | $131,229 | $-18,771 |
$ in Chicago-Naperville-Elgin = in Sioux Falls
Same BEA Regional Price Parity ratio as the table above (103.6 → 90.6), computed live from your number, nothing is sent anywhere.
What This Comparison Actually Tells You
Chicago-Naperville-Elgin, IL-IN and Sioux Falls, SD-MN sit in clearly different price tiers, separated by 13.0 RPP points. At this distance, treating the same nominal salary as equivalent would materially change purchasing power.
This route crosses the national benchmark: Chicago-Naperville-Elgin is above 100 while Sioux Falls is below it. That makes the move a change of price regime, not merely a rank swap.
Rents leads the difference, with Sioux Falls 34.4 points lower than Chicago-Naperville-Elgin. Goods, services, and rents all point in the same broad direction, making the headline comparison more transferable across household types.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
For a housing-sensitive move, validate the rent gap first: HUD Fair Market Rent and the actual unit size can overturn what the blended index implies. On the BEA ratio alone, $100,000 in Chicago-Naperville-Elgin corresponds to $87,486 in Sioux Falls.
Category Breakdown
Goods
- Chicago-Naperville-Elgin
- 107.3
- Sioux Falls
- 95.5
Diff -11.8 RPP
Services
- Sioux Falls
- 80.7
Diff -2.9 RPP
Rents
- Chicago-Naperville-Elgin
- 112.0
- Sioux Falls
- 77.6
Diff -34.4 RPP
| Category | Chicago-Naperville-Elgin | Sioux Falls | Difference |
|---|---|---|---|
| Overall | 103.6 | 90.6 | -13.0 |
| Goods | 107.3 | 95.5 | -11.8 |
| Services | 83.6 | 80.7 | -2.9 |
| Rents | 112.0 | 77.6 | -34.4 |
Visual Comparison
Overall
Chicago-Naperville-Elgin 103.6
Sioux Falls 90.6
Goods
Chicago-Naperville-Elgin 107.3
Sioux Falls 95.5
Services
Chicago-Naperville-Elgin 83.6
Sioux Falls 80.7
Rents
Chicago-Naperville-Elgin 112.0
Sioux Falls 77.6
Vertical line = national average (100)
Chicago-Naperville-Elgin
103.6
Cost Index
Sioux Falls
90.6
Cost Index
How the Price Gap Changed
Chicago-Naperville-Elgin and Sioux Falls share 17 published annual releases from 2008 through 2024. Their overall gap widened, moving from 11.0 to 13.0 RPP points. Chicago-Naperville-Elgin remained the higher-index metro in the latest release.
Rents changed the most within this pair: its gap moved 10.7 points between the first and latest shared releases (45.1 to 34.4 points). This describes a relative price-index history, not a forecast or a household budget.
| Release Year | Chicago-Naperville-Elgin RPP | Sioux Falls RPP | Relative Gap |
|---|---|---|---|
| 2008 | 105.4 | 94.4 | 11.0 points Chicago-Naperville-Elgin higher |
| 2012 | 105.1 | 94.1 | 11.0 points Chicago-Naperville-Elgin higher |
| 2016 | 103.8 | 93.5 | 10.3 points Chicago-Naperville-Elgin higher |
| 2020 | 104.5 | 93.8 | 10.7 points Chicago-Naperville-Elgin higher |
| 2024 | 103.6 | 90.6 | 13.0 points Chicago-Naperville-Elgin 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 Sioux Falls more expensive than Chicago-Naperville-Elgin?
Sioux Falls is 12.5% less expensive than Chicago-Naperville-Elgin. The overall cost index is 90.6 vs 103.6 (national average = 100).
What salary in Sioux Falls equals $100K in Chicago-Naperville-Elgin?
A $100,000 salary in Chicago-Naperville-Elgin has the same purchasing power as $87,486 in Sioux Falls. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Chicago-Naperville-Elgin and Sioux Falls?
Rents in Chicago-Naperville-Elgin are indexed at 112.0 while Sioux Falls is at 77.6 (national average = 100). Chicago-Naperville-Elgin 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.