Overall
Diff -0.7 RPP
Kankakee vs Helena
Cost of living comparison based on BEA Regional Price Parities. Helena is 0.7% less expensive than Kankakee.
0.7% less expensive
Helena, MT is 0.7% less expensive than Kankakee, IL on BEA Regional Price Parities (overall RPP 95.7 vs 96.4). A $100,000 salary in Kankakee buys about the same as $99,254 in Helena; the largest component gap is services.
- Overall RPP 96.4 (Kankakee) vs 95.7 (Helena)
- $100k in Kankakee ≈ $99,254 purchasing power in Helena
- Services drives the gap (-16.8 RPP points)
RPP parity plate
Pair IL:MT 96.4→95.7
PHOTO-FINISH · CROSS-STATE · SPLIT-BUDGET · BOTH-BELOW · PP-PAR
- PHOTO-FINISH Photo finish
- CROSS-STATE IL × MT
- 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.
Kankakee
96.4
Cost Index
Helena
95.7
Cost Index
What This Comparison Actually Tells You
Kankakee, IL and Helena, MT 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: Helena is 16.8 points lower. 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 Kankakee to $99,254 in Helena, 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 | Kankakee | Helena | Difference |
|---|---|---|---|
| Overall | 96.4 | 95.7 | -0.7 |
| Goods | 93.6 | 96.0 | +2.4 |
| Services | 89.4 | 72.6 | -16.8 |
| Rents | 92.9 | 90.1 | -2.7 |
Visual Comparison
Overall
Kankakee 96.4
Helena 95.7
Goods
Kankakee 93.6
Helena 96.0
Services
Kankakee 89.4
Helena 72.6
Rents
Kankakee 92.9
Helena 90.1
Vertical line = national average (100)
How the Price Gap Changed
Kankakee and Helena share 17 published annual releases from 2008 through 2024. Their overall gap narrowed, moving from 3.5 to 0.7 RPP points. Kankakee remained the higher-index metro in the latest release.
Services changed the most within this pair: its gap moved 5.5 points between the first and latest shared releases (22.2 to 16.8 points). This describes a relative price-index history, not a forecast or a household budget.
| Release Year | Kankakee RPP | Helena RPP | Relative Gap |
|---|---|---|---|
| 2008 | 99.5 | 96.0 | 3.5 points Kankakee higher |
| 2012 | 99.2 | 92.0 | 7.2 points Kankakee higher |
| 2016 | 97.6 | 95.6 | 2.1 points Kankakee higher |
| 2020 | 90.6 | 92.0 | 1.4 points Helena higher |
| 2024 | 96.4 | 95.7 | 0.7 points Kankakee 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.
Salary Equivalents
What a salary in Kankakee would need to be in Helena for the same purchasing power:
| In Kankakee | In Helena | Difference |
|---|---|---|
| $50,000 | $49,627 | $-373 |
| $75,000 | $74,441 | $-559 |
| $100,000 | $99,254 | $-746 |
| $150,000 | $148,881 | $-1,119 |
$ in Kankakee = in Helena
Same BEA Regional Price Parity ratio as the table above (96.4 → 95.7), computed live from your number, nothing is sent anywhere.
Frequently Asked Questions
Is Helena more expensive than Kankakee?
Helena is 0.7% less expensive than Kankakee. The overall cost index is 95.7 vs 96.4 (national average = 100).
What salary in Helena equals $100K in Kankakee?
A $100,000 salary in Kankakee has the same purchasing power as $99,254 in Helena. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Kankakee and Helena?
Rents in Kankakee are indexed at 92.9 while Helena is at 90.1 (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.