Overall
- Decatur
- 88.4
Diff -27.2 RPP
San Francisco-Oakland-Fremont vs Decatur
Cost of living comparison based on BEA Regional Price Parities. Decatur is 23.5% less expensive than San Francisco-Oakland-Fremont.
23.5% less expensive
Decatur, IL is 23.5% less expensive than San Francisco-Oakland-Fremont, CA on BEA Regional Price Parities (overall RPP 88.4 vs 115.6). A $100,000 salary in San Francisco-Oakland-Fremont buys about the same as $76,481 in Decatur; the largest component gap is rents.
- Overall RPP 115.6 (San Francisco-Oakland-Fremont) vs 88.4 (Decatur)
- $100k in San Francisco-Oakland-Fremont ≈ $76,481 purchasing power in Decatur
- Rents drives the gap (-138.5 RPP points)
RPP parity plate
Pair CA:IL 115.6→88.4
TIER-GAP · CROSS-STATE · RENT-LED · BENCH-CROSS · PP-STEEP
- TIER-GAP Clear tier gap
- CROSS-STATE CA × IL
- RENT-LED Rent-led gap
- BENCH-CROSS Benchmark cross
- PP-STEEP Steep PP convert
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 San Francisco-Oakland-Fremont would need to be in Decatur for the same purchasing power:
| In San Francisco-Oakland-Fremont | In Decatur | Difference |
|---|---|---|
| $50,000 | $38,241 | $-11,759 |
| $75,000 | $57,361 | $-17,639 |
| $100,000 | $76,481 | $-23,519 |
| $150,000 | $114,722 | $-35,278 |
$ in San Francisco-Oakland-Fremont = in Decatur
Same BEA Regional Price Parity ratio as the table above (115.6 → 88.4), computed live from your number, nothing is sent anywhere.
What This Comparison Actually Tells You
San Francisco-Oakland-Fremont, CA and Decatur, IL sit in clearly different price tiers, separated by 27.2 RPP points. At this distance, treating the same nominal salary as equivalent would materially change purchasing power.
This route crosses the national benchmark: San Francisco-Oakland-Fremont is above 100 while Decatur is below it. That makes the move a change of price regime, not merely a rank swap.
Rents leads the difference, with Decatur 138.5 points lower than San Francisco-Oakland-Fremont. 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 San Francisco-Oakland-Fremont corresponds to $76,481 in Decatur.
Category Breakdown
Goods
- Decatur
- 93.6
Diff -14.8 RPP
Services
- Decatur
- 91.1
Diff -81.5 RPP
Rents
- Decatur
- 56.2
Diff -138.5 RPP
| Category | San Francisco-Oakland-Fremont | Decatur | Difference |
|---|---|---|---|
| Overall | 115.6 | 88.4 | -27.2 |
| Goods | 108.5 | 93.6 | -14.8 |
| Services | 172.6 | 91.1 | -81.5 |
| Rents | 194.7 | 56.2 | -138.5 |
Visual Comparison
Overall
San Francisco-Oakland-Fremont 115.6
Decatur 88.4
Goods
San Francisco-Oakland-Fremont 108.5
Decatur 93.6
Services
San Francisco-Oakland-Fremont 172.6
Decatur 91.1
Rents
San Francisco-Oakland-Fremont 194.7
Decatur 56.2
Vertical line = national average (100)
San Francisco-Oakland-Fremont
115.6
Cost Index
Decatur
88.4
Cost Index
How the Price Gap Changed
San Francisco-Oakland-Fremont and Decatur share 17 published annual releases from 2008 through 2024. Their overall gap held broadly steady, moving from 28.1 to 27.2 RPP points. San Francisco-Oakland-Fremont remained the higher-index metro in the latest release.
Services changed the most within this pair: its gap moved 63.6 points between the first and latest shared releases (17.9 to 81.5 points). This describes a relative price-index history, not a forecast or a household budget.
| Release Year | San Francisco-Oakland-Fremont RPP | Decatur RPP | Relative Gap |
|---|---|---|---|
| 2008 | 119.1 | 91.0 | 28.1 points San Francisco-Oakland-Fremont higher |
| 2012 | 112.5 | 93.0 | 19.5 points San Francisco-Oakland-Fremont higher |
| 2016 | 116.4 | 88.9 | 27.5 points San Francisco-Oakland-Fremont higher |
| 2020 | 119.6 | 88.3 | 31.3 points San Francisco-Oakland-Fremont higher |
| 2024 | 115.6 | 88.4 | 27.2 points San Francisco-Oakland-Fremont 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 Decatur more expensive than San Francisco-Oakland-Fremont?
Decatur is 23.5% less expensive than San Francisco-Oakland-Fremont. The overall cost index is 88.4 vs 115.6 (national average = 100).
What salary in Decatur equals $100K in San Francisco-Oakland-Fremont?
A $100,000 salary in San Francisco-Oakland-Fremont has the same purchasing power as $76,481 in Decatur. This is based on the BEA Regional Price Parity indexes.
How do rents compare between San Francisco-Oakland-Fremont and Decatur?
Rents in San Francisco-Oakland-Fremont are indexed at 194.7 while Decatur is at 56.2 (national average = 100). San Francisco-Oakland-Fremont 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.