Overall
- Charleston
- 88.7
- Rapid City
- 89.2
Diff +0.4 RPP
Charleston vs Rapid City
Cost of living comparison based on BEA Regional Price Parities. Rapid City is 0.5% more expensive than Charleston.
0.5% more expensive
Rapid City, SD is 0.5% more expensive than Charleston, WV on BEA Regional Price Parities (overall RPP 89.2 vs 88.7). A $100,000 salary in Charleston buys about the same as $100,499 in Rapid City; the largest component gap is rents.
- Overall RPP 88.7 (Charleston) vs 89.2 (Rapid City)
- $100k in Charleston ≈ $100,499 purchasing power in Rapid City
- Rents drives the gap (+21.2 RPP points)
RPP parity plate
Pair WV:SD 88.7→89.2
PHOTO-FINISH · CROSS-STATE · SPLIT-BUDGET · BOTH-BELOW · PP-PAR
- PHOTO-FINISH Photo finish
- CROSS-STATE WV × SD
- 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.
Charleston
88.7
Cost Index
Rapid City
89.2
Cost Index
What This Comparison Actually Tells You
Charleston, WV and Rapid City, SD are a photo finish on overall price level, only 0.4 RPP points apart. A salary conversion is therefore a fine adjustment, not evidence of a fundamentally different cost regime.
Rents creates the largest separation: Rapid City is 21.2 points higher. But services 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 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 Charleston corresponds to $100,499 in Rapid City.
Category Breakdown
Goods
- Charleston
- 96.3
- Rapid City
- 95.5
Diff -0.8 RPP
Services
- Charleston
- 91.7
- Rapid City
- 79.1
Diff -12.6 RPP
Rents
- Charleston
- 51.4
- Rapid City
- 72.6
Diff +21.2 RPP
| Category | Charleston | Rapid City | Difference |
|---|---|---|---|
| Overall | 88.7 | 89.2 | +0.4 |
| Goods | 96.3 | 95.5 | -0.8 |
| Services | 91.7 | 79.1 | -12.6 |
| Rents | 51.4 | 72.6 | +21.2 |
Visual Comparison
Overall
Charleston 88.7
Rapid City 89.2
Goods
Charleston 96.3
Rapid City 95.5
Services
Charleston 91.7
Rapid City 79.1
Rents
Charleston 51.4
Rapid City 72.6
Vertical line = national average (100)
Salary Equivalents
What a salary in Charleston would need to be in Rapid City for the same purchasing power:
| In Charleston | In Rapid City | Difference |
|---|---|---|
| $50,000 | $50,250 | +$250 |
| $75,000 | $75,375 | +$375 |
| $100,000 | $100,499 | +$499 |
| $150,000 | $150,749 | +$749 |
$ in Charleston = in Rapid City
Same BEA Regional Price Parity ratio as the table above (88.7 → 89.2), computed live from your number, nothing is sent anywhere.
Frequently Asked Questions
Is Rapid City more expensive than Charleston?
Rapid City is 0.5% more expensive than Charleston. The overall cost index is 89.2 vs 88.7 (national average = 100).
What salary in Rapid City equals $100K in Charleston?
A $100,000 salary in Charleston has the same purchasing power as $100,499 in Rapid City. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Charleston and Rapid City?
Rents in Charleston are indexed at 51.4 while Rapid City is at 72.6 (national average = 100). Rapid City 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.