Overall
Diff +0.7 RPP
Helena vs Kankakee
Cost of living comparison based on BEA Regional Price Parities. Kankakee is 0.8% more expensive than Helena.
0.8% more expensive
Kankakee, IL is 0.8% more expensive than Helena, MT on BEA Regional Price Parities (overall RPP 96.4 vs 95.7). A $100,000 salary in Helena buys about the same as $100,752 in Kankakee; the largest component gap is services.
- Overall RPP 95.7 (Helena) vs 96.4 (Kankakee)
- $100k in Helena ≈ $100,752 purchasing power in Kankakee
- Services drives the gap (+16.8 RPP points)
RPP parity plate
Pair MT:IL 95.7→96.4
PHOTO-FINISH · CROSS-STATE · SPLIT-BUDGET · BOTH-BELOW · PP-PAR
- PHOTO-FINISH Photo finish
- CROSS-STATE MT × 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.
Helena
95.7
Cost Index
Kankakee
96.4
Cost Index
What This Comparison Actually Tells You
Helena, MT and Kankakee, IL are a photo finish on overall price level, only 0.7 RPP points apart. A salary conversion is therefore a fine adjustment, not evidence of a fundamentally different cost regime.
Services creates the largest separation: Kankakee is 16.8 points higher. But 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 Helena to $100,752 in Kankakee, but it is not a personal spending weight.
Category Breakdown
Goods
Diff -2.4 RPP
Services
Diff +16.8 RPP
Rents
Diff +2.7 RPP
| Category | Helena | Kankakee | Difference |
|---|---|---|---|
| Overall | 95.7 | 96.4 | +0.7 |
| Goods | 96.0 | 93.6 | -2.4 |
| Services | 72.6 | 89.4 | +16.8 |
| Rents | 90.1 | 92.9 | +2.7 |
Visual Comparison
Overall
Helena 95.7
Kankakee 96.4
Goods
Helena 96.0
Kankakee 93.6
Services
Helena 72.6
Kankakee 89.4
Rents
Helena 90.1
Kankakee 92.9
Vertical line = national average (100)
Salary Equivalents
What a salary in Helena would need to be in Kankakee for the same purchasing power:
| In Helena | In Kankakee | Difference |
|---|---|---|
| $50,000 | $50,376 | +$376 |
| $75,000 | $75,564 | +$564 |
| $100,000 | $100,752 | +$752 |
| $150,000 | $151,127 | +$1,127 |
$ in Helena = in Kankakee
Same BEA Regional Price Parity ratio as the table above (95.7 → 96.4), computed live from your number, nothing is sent anywhere.
Frequently Asked Questions
Is Kankakee more expensive than Helena?
Kankakee is 0.8% more expensive than Helena. The overall cost index is 96.4 vs 95.7 (national average = 100).
What salary in Kankakee equals $100K in Helena?
A $100,000 salary in Helena has the same purchasing power as $100,752 in Kankakee. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Helena and Kankakee?
Rents in Helena are indexed at 90.1 while Kankakee is at 92.9 (national average = 100). Kankakee 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.