The guide is written for voters, local residents and journalists who want to understand affordability comparisons without headlines that rely on a single index. It points to the primary sources and explains practical checks to avoid common data mistakes.
What we mean by “most overpriced” and why this matters
Key terms: price level, affordability, cost burden, cost of living by us state
The phrase most overpriced state is shorthand for a place where typical prices for goods, services and housing are high relative to local incomes and take-home pay. To make that comparison useful, analysts pair a measure of price level with income and tax context rather than relying on a single headline index. One widely used government measure for cross-state price levels is the BEA Regional Price Parities, which provides the baseline price comparisons used in many affordability analyses BEA Regional Price Parities
Housing costs, including both rents and home values, are usually the largest single driver of why a state feels overpriced. Housing pushes many states into higher cost tiers and often requires separate treatment in any composite measure. For housing metrics, state and metro series from Zillow and Census housing cost tables are the relevant starting points Zillow Research
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For a reliable comparison, follow the method section and use the primary data sources listed later, then report the dates and geographic units you used.
Taxes and local wages also change the picture. A state with high prices but substantially higher median income or a lighter tax burden will look different from one where wages lag and taxes are high. Consider tax measures and living wage results alongside price indices when judging whether a state is truly unaffordable Tax Foundation state and local tax burden
Finally, avoid single-index headlines. Private and government indices measure different baskets and units, and a fair assessment requires matching the geographic unit and vintage of the data you compare. Where possible, show component measures rather than a single unqualified rank C2ER Cost of Living Index
Primary data sources to use and what each measures
BEA Regional Price Parities (RPP) measure broad price levels across states and many metro areas. RPPs convert regional price differences into a comparable index and are the standard government reference for cross-state price comparison BEA Regional Price Parities and the BEA release page Regional Price Parities release
The American Community Survey provides median household income and housing-cost tables that researchers use to contextualize price levels. Median income and ACS housing cost burden statistics show whether higher prices translate into heavier cost loads for residents American Community Survey
Zillow publishes state and metro home value and rent series that highlight where housing departs from national patterns. Because housing often dominates cost differences, Zillow data help isolate whether high state-level prices are driven by home values or rental markets Zillow Research
The C2ER Cost of Living Index is a private benchmark offering metropolitan-area detail and a transparent basket methodology. It complements government RPPs by allowing analysts to compare consumer baskets in specific urban areas where state averages may hide local spikes Cost of Living Index (COLI)
The MIT Living Wage Calculator estimates local wage needs to meet basic living costs and is useful when asking whether local wages cover a local price structure. It is not a median income series but a policy-relevant complement for wage sufficiency checks MIT Living Wage Calculator
The Tax Foundation provides state and local tax burden measures that affect after-tax take-home pay. Including tax burden adjusts the affordability comparison so net resources are closer to the household reality Tax Foundation state and local tax burden
A step-by-step framework for judging if a state is overpriced
This section lays out a reproducible approach to build a composite affordability score. The method combines BEA RPP for general price level, a housing index such as Zillow for housing exposure, median income or the MIT living wage for income context, and a tax-burden adjustment from the Tax Foundation to capture after-tax effects BEA Regional Price Parities. See the FRED release table for downloadable RPP tables FRED release table
Step 1: Start with RPP. Use the BEA state RPP as the general price-level input. RPPs provide a consistent baseline for nonhousing price differences and avoid mixing incompatible baskets BEA Regional Price Parities
Weight housing more when household shelter costs matter most, such as for renters or prospective buyers; use median income or a living wage when assessing affordability for typical residents, and always test sensitivity to different weights.
Step 2: Add housing metrics. Include a housing score from Zillow or ACS housing-cost burden measures. Because housing typically dominates cost differences, many analysts weight housing more heavily in the composite, then test sensitivity to that choice Zillow Research
Step 3: Adjust for income or living wage. Divide the price composite by median household income or compare it to the MIT living wage to show how price levels relate to local earning power American Community Survey
Step 4: Factor taxes. Apply a tax-burden adjustment to approximate after-tax income before finalizing the affordability score. The Tax Foundation tables let you convert pre-tax median income into a rough after-tax resource measure Tax Foundation state and local tax burden
Weighting and sensitivity testing are essential. There is no single correct weight; instead, show results under several reasonable weightings and report which states move most when housing weight changes, which helps avoid overstating a single-state conclusion Zillow Research
How housing changes the picture: rents, home values, and cost burden
Housing often explains why a state ranks high in price-level comparisons. State home values and rent indexes from Zillow reveal whether ownership or rental markets are the driver, and those series are the right tools to isolate housing effects from general price levels Zillow Research
Use ACS measures of housing cost burden to see how households are affected in practice. The ACS reports the share of households spending large shares of income on housing, which directly connects price series to household stress American Community Survey
Rent pressure and home-value appreciation have different policy and personal implications. For renters, short-term rent spikes determine monthly stress. For prospective buyers, sustained home-value growth affects down payment requirements and long-term affordability. Choose rent or home-value series depending on whether your focus is renters or owners Zillow Research
When presenting results, separate rent-driven versus owner-driven findings so readers understand which demographic is most exposed to a state’s housing-driven expense structure. This distinction keeps rankings from obscuring important differences between household types American Community Survey and for more about the author and approach see about
Income, wages and the living wage perspective
Median household income from the ACS provides the common income context for price comparisons. Median income helps show whether higher prices are counterbalanced by higher wages, but it can mask within-state inequality and differences across metropolitan areas American Community Survey
The MIT Living Wage Calculator estimates the wage needed for basic needs in counties and states and complements median income by showing whether local wages meet basic living costs. Use it to identify places where median wages may be insufficient for commonly needed goods and services MIT Living Wage Calculator
A simple affordability ratio can be constructed to compare price and income: divide a composite price index by median household income or relate a price index to the living wage. Report the formula clearly and show how results change if you replace median income with the living wage for lower-income sensitivity checks MIT Living Wage Calculator
Note that higher median income can partially offset higher prices for many households but may not protect lower-income residents. When possible, present both median and lower-percentile income context to capture this variation American Community Survey
Taxes and after-tax affordability
State and local taxes change the effective resources households have to meet local prices. The Tax Foundation’s state and local tax burden series summarizes tax loads that can then be applied to median income to estimate after-tax income for affordability comparisons Tax Foundation state and local tax burden
Different tax structures can change rankings. A moderate price advantage can disappear when a state’s tax burden is higher than peers. Include a tax adjustment as a separate column in any table so readers can see pre-tax and after-tax results side by side Tax Foundation state and local tax burden
To fold taxes into an affordability score, convert median pre-tax income to a post-tax estimate using the tax-burden percentage, then recompute the affordability ratio using after-tax income. Report the tax assumptions and point readers to the Tax Foundation tables for replication Tax Foundation state and local tax burden
Tools and calculators to try yourself
Quick composite affordability score using price income and tax fields
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Index
Designed for spreadsheet testing
Practical tools let you fetch and test the inputs used in this guide. Download BEA RPP files for the price baseline, fetch Zillow state or metro files for housing inputs, and use ACS tables for income and housing-cost burden measures BEA Regional Price Parities
Use the MIT Living Wage interface to compare local wage needs for alternative income context, and consult the Tax Foundation pages to apply a tax-burden adjustment. Save the dataset dates and file names you used so results are reproducible MIT Living Wage Calculator
When testing weightings, rerun the composite with a higher housing weight and again with a lower housing weight to see which states move most. Report the sensitivity results alongside any headline list so readers see how how robust the ordering is to reasonable choices Zillow Research
Examples: states that typically appear at the top and why
Government price-level and housing data consistently place states such as Hawaii, California and New York near the top of national price comparisons. These states combine high general price levels with very expensive housing markets, which pushes them into the highest cost tiers BEA Regional Price Parities
In some high-price states, higher median incomes partly offset affordability impacts for many households. That is why a state can rank high on price level but not always be the most unaffordable when income and taxes are taken into account American Community Survey
Because of these offsetting effects, refrain from declaring a single 2026 “most overpriced” state without showing component scores. Instead, report component columns for RPP, housing index, median income and tax burden so readers can see the drivers behind any top-of-list placement Zillow Research
Common mistakes and data pitfalls to avoid
Mixing vintages creates misleading comparisons. If you use BEA RPP from one year and Zillow housing from another year, apparent differences may reflect timing rather than true relative changes. Always report the data years you used BEA Regional Price Parities
Another pitfall is comparing metro indices to state averages without aligning geographic units. A few high-cost metros can skew a state’s average, so check metro-level C2ER or Zillow data when a state’s average hides local extremes Cost of Living Index (COLI)
Overreliance on a single indicator is common. Housing often dominates; if you publish a single ranked list, label it clearly as housing-driven or overall price-driven and provide alternative lists for different weightings to avoid overstating any single conclusion Zillow Research
Practical decision scenarios for readers
Relocating households should prioritize housing metrics and local wages. Check Zillow home-value and rent series and compare them to ACS local wage and housing-cost burden tables to understand monthly impacts and purchase barriers Zillow Research
Retirees and fixed-income residents need to focus on components that affect recurring expenses, such as rents, property taxes, and local service costs. Note that standard RPP and COLI measures may not capture healthcare or long-term care costs directly, so supplement with local service price checks where relevant American Community Survey
Remote workers should consider local RPP and state tax differences because take-home pay and local price levels jointly determine effective affordability. Use the MIT living wage and Tax Foundation pages to test how pay and taxes change your local purchasing power MIT Living Wage Calculator
Short state comparison case notes (how to present results without misleading readers)
When presenting a ranked list, show a component breakdown table with columns for RPP, housing index, median income and tax burden rather than a single combined rank. This exposes which component drives each state’s placement and helps readers draw their own conclusions BEA Regional Price Parities
Include clear labeling and caveats about data years and geographic units. Note whether numbers are state averages or metro-level and remind readers that sensitivity to housing weight is often material for the top positions Cost of Living Index (COLI)
Link or cite the primary sources so others can replicate the results. Transparency about inputs and methods improves trust and helps prevent misunderstandings about which state might be called most overpriced under different assumptions Zillow Research
How journalists and researchers should verify 2026 rankings
Confirm the latest BEA RPP release and cite the specific BEA table or file used. BEA release dates and file names should be reported so readers and reviewers can locate the exact numbers behind any claim BEA Regional Price Parities or the catalog listing Regional Price Parities dataset
Cross-check Zillow and ACS vintages to avoid mixing 2023 data with 2024 indices. When you use C2ER metro detail, cite it explicitly and match metro definitions across datasets to keep the comparison apples-to-apples Zillow Research
State your composite method and run sensitivity checks. Publish alternative weightings and a brief discussion of how rankings change when housing weight is increased or decreased, so readers see the robustness of the results Cost of Living Index (COLI)
Key takeaways and next steps for readers
Combining BEA RPP, housing metrics, income context and tax-burden adjustments produces a more reliable assessment of which state is most overpriced than any single index alone. Present component columns and sensitivity checks rather than a single unqualified rank BEA Regional Price Parities
Next steps: fetch the primary datasets, document their dates and geographic units, test reasonable weightings, and publish both pre-tax and after-tax comparisons. Those steps let readers and reporters replicate and understand any claim about an overpriced state Zillow Research
Combine a general price-level measure such as BEA RPP with housing metrics, median income or a living-wage measure, and a tax-burden adjustment. Report data years and test sensitivity to housing weight.
State and metro home value and rent series from Zillow, together with ACS housing-cost burden tables, are the best starting points to isolate housing effects.
Not always. Higher median income or a lower tax burden can partially offset high prices, so income and after-tax measures must be considered.
If you publish a list, include data years, geographic units and alternative weightings so readers can judge how robust the ordering is.
References
- https://www.bea.gov/data/prices/regional-price-parities-state-and-metro-area
- https://www.zillow.com/research/data/
- https://taxfoundation.org/research/all/state-local-tax-burden/
- https://www.coli.org
- https://www.census.gov/programs-surveys/acs
- https://livingwage.mit.edu
- https://michaelcarbonara.com/contact/
- https://www.bea.gov/data/prices-inflation/regional-price-parities-state-and-metro-area
- https://fred.stlouisfed.org/release/tables?eid=233639&rid=403
- https://michaelcarbonara.com/news/
- https://michaelcarbonara.com/about/
- https://catalog.data.gov/dataset/regional-price-parities-by-state-and-metro-area
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