Overall
- Auburn-Opelika
- 87.9
- Decatur
- 88.4
Diff +0.5 RPP
Auburn-Opelika vs Decatur
Cost of living comparison based on BEA Regional Price Parities. Decatur is 0.6% more expensive than Auburn-Opelika.
0.6% more expensive
Decatur, IL is 0.6% more expensive than Auburn-Opelika, AL on BEA Regional Price Parities (overall RPP 88.4 vs 87.9). A $100,000 salary in Auburn-Opelika buys about the same as $100,556 in Decatur; the largest component gap is services.
- Overall RPP 87.9 (Auburn-Opelika) vs 88.4 (Decatur)
- $100k in Auburn-Opelika ≈ $100,556 purchasing power in Decatur
- Services drives the gap (+7.2 RPP points)
RPP parity plate
Pair AL:IL 87.9→88.4
PHOTO-FINISH · CROSS-STATE · SPLIT-BUDGET · BOTH-BELOW · PP-PAR
- PHOTO-FINISH Photo finish
- CROSS-STATE AL × IL
- SPLIT-BUDGET Split budget
- BOTH-BELOW Both below 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.
Auburn-Opelika
87.9
Cost Index
Decatur
88.4
Cost Index
What This Comparison Actually Tells You
Auburn-Opelika, AL and Decatur, IL are a photo finish on overall price level, only 0.5 RPP points apart. A salary conversion is therefore a fine adjustment, not evidence of a fundamentally different cost regime.
Services creates the largest separation: Decatur is 7.2 points higher. But rents and goods 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 remain below the U.S. benchmark of 100. This comparison chooses between two below-average price levels; “more expensive” here does not mean nationally expensive.
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 Auburn-Opelika to $100,556 in Decatur, but it is not a personal spending weight.
Category Breakdown
Goods
- Auburn-Opelika
- 96.4
- Decatur
- 93.6
Diff -2.8 RPP
Services
- Auburn-Opelika
- 83.9
- Decatur
- 91.1
Diff +7.2 RPP
Rents
- Auburn-Opelika
- 62.1
- Decatur
- 56.2
Diff -5.9 RPP
| Category | Auburn-Opelika | Decatur | Difference |
|---|---|---|---|
| Overall | 87.9 | 88.4 | +0.5 |
| Goods | 96.4 | 93.6 | -2.8 |
| Services | 83.9 | 91.1 | +7.2 |
| Rents | 62.1 | 56.2 | -5.9 |
Visual Comparison
Overall
Auburn-Opelika 87.9
Decatur 88.4
Goods
Auburn-Opelika 96.4
Decatur 93.6
Services
Auburn-Opelika 83.9
Decatur 91.1
Rents
Auburn-Opelika 62.1
Decatur 56.2
Vertical line = national average (100)
Salary Equivalents
What a salary in Auburn-Opelika would need to be in Decatur for the same purchasing power:
| In Auburn-Opelika | In Decatur | Difference |
|---|---|---|
| $50,000 | $50,278 | +$278 |
| $75,000 | $75,417 | +$417 |
| $100,000 | $100,556 | +$556 |
| $150,000 | $150,834 | +$834 |
$ in Auburn-Opelika = in Decatur
Same BEA Regional Price Parity ratio as the table above (87.9 → 88.4), computed live from your number, nothing is sent anywhere.
Frequently Asked Questions
Is Decatur more expensive than Auburn-Opelika?
Decatur is 0.6% more expensive than Auburn-Opelika. The overall cost index is 88.4 vs 87.9 (national average = 100).
What salary in Decatur equals $100K in Auburn-Opelika?
A $100,000 salary in Auburn-Opelika has the same purchasing power as $100,556 in Decatur. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Auburn-Opelika and Decatur?
Rents in Auburn-Opelika are indexed at 62.1 while Decatur is at 56.2 (national average = 100). Auburn-Opelika 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.