BEA RPP anchor
Every state-level price claim anchors to the BEA RPP first. RPP covers all 50 states + DC plus 384 metro areas with a transparent BLS-priced basket.
Sources, calculations, scope | Verified May 2026
Cost of Living Methodology
Cost of living rankings are widely cited but rarely well understood. This page documents the citation chain, the calculation framework, the scope decisions and the known limitations. The site anchors on BEA Regional Price Parities and cross-checks against C2ER, BLS CPI, Census ACS and federal agency data.
Calculation framework
How the numbers are built.
BLS CPI for time-shift
When the underlying dataset is older than the current quarter, we apply the relevant BLS CPI regional change to time-shift figures forward.
Census ACS for housing
Median home value and gross rent come from the ACS 5-year estimates. Refresh against Zillow ZHVI and Apartment List for current-quarter housing.
USDA + AAA + EIA for utilities
Grocery from USDA Food Plans, gas from AAA, electricity and natural gas from EIA. State-level public-data sources with monthly updates.
C2ER for the consumer basket weights
Where we report a composite cost index, the weights (28/33/13/12/10/4) follow C2ER methodology so figures are directly comparable to other publications that cite C2ER.
Tax Foundation for the tax overlay
C2ER excludes taxes. The /taxes page layers Tax Foundation total state-and-local burden on top of the cost index to produce a true-cost view.
The footnote that matters
Standard COLI excludes taxes.
The single most important caveat: the C2ER index does not include state income tax, property tax, sales tax or federal taxes. A state with low cost of living can still be expensive after taxes; a state with high cost of living can be cheaper than it looks if it has no income tax.
We address this on the taxes page by layering Tax Foundation total state-and-local burden estimates on top of the cost index to produce a "true cost of living" combined measure.
Other things the index does not capture: federal taxes (uniform across states), savings rate, retirement-specific tax treatment (covered on the retirement page), quality of life, education quality, crime, climate and commute time.
Primary sources
Data sources cited across the site
| Dataset | Publisher | Period | How we use it |
|---|---|---|---|
| Regional Price Parities (RPP) | Bureau of Economic Analysis (BEA) | Annual, 2024 release (latest) | Primary anchor for state-level price comparison. Gold-standard federal statistic; covers all 50 states + DC and 384 metro areas. |
| Consumer Price Index by region | Bureau of Labor Statistics (BLS) | Monthly, current | Inflation trend by Census region (Northeast, Midwest, South, West). Used to time-shift older BEA / C2ER figures to current quarter. |
| American Community Survey (ACS) 5-year | US Census Bureau | 5-year estimates 2019-2023 | Median household income, median home value, gross rent, household size for every state. |
| Living Wage Calculator | MIT (Glasmeier, Department of Urban Studies) | Updated annually | Required income by family composition by county. Benchmark for 'what does a family of four actually need' answers. |
| Cost of Living Index (COLI) | Council for Community and Economic Research (C2ER) | Quarterly, Q1 2026 | Consumer-basket cross-check. Six categories with published weights (housing 28%, miscellaneous 33%, groceries 13%, transportation 12%, utilities 10%, healthcare 4%). Used as cross-check on BEA RPP, not as anchor. |
| Numbeo Cost of Living Index | Numbeo (user-sourced) | Rolling 18 months | Sanity check on metro-level cost figures. Flagged explicitly as user-sourced and subject to selection bias. Never used as anchor. |
| Home Value Index (ZHVI) | Zillow Research | Monthly, current | Median home value by state, refresh against ACS for current-quarter housing figures. |
| Rent Reports | Apartment List | Monthly, current | Median 2-bedroom rent by state and metro. Cross-check against ACS gross-rent estimates. |
| USDA Food Plans (Thrifty, Low, Moderate, Liberal) | USDA Center for Nutrition Policy and Promotion | Monthly, current | Weekly grocery cost by family composition. Anchor for the grocery sub-index. |
| State Gas Price Averages | AAA Gas Prices | Daily, current | Regular unleaded gas price by state. Anchor for the transportation sub-index. |
| State Energy Profiles | US Energy Information Administration (EIA) | Monthly, current | Average residential electricity rate (cents per kWh), natural gas, total energy spend per capita. |
| State Health Spending | Kaiser Family Foundation (KFF) | Annual, 2024 release | Total health spending per capita, employer-sponsored premium averages, uninsured rate by state, Medicaid expansion status. |
| Marketplace Health Insurance | Healthcare.gov / CMS | Open enrolment 2026 | Benchmark silver-plan premiums by state, ACA subsidy thresholds. |
| State and Local Tax Burden | Tax Foundation | Fiscal year 2024-2025 | Total state and local tax burden as percent of state income. Used in the /taxes page true-cost-of-living overlay. |
| State Occupational Employment and Wage Statistics (OEWS) | Bureau of Labor Statistics | May 2024 release | Median wage by occupation by state. Powers the salary-purchasing-power calculations. |
| National Broadband Map | Federal Communications Commission (FCC) | Current, 2025 | Percentage of households with 100Mbps+ broadband, average residential speed by state. |
| Hospital and Healthcare Access | American Hospital Association (AHA) / CMS | 2024-2025 | Hospitals per 100,000 residents. Cross-check Medicaid expansion via CMS state-by-state lookup. |
In scope vs out of scope
In scope
- State-level cost of living comparison for all 50 states + DC
- Per-category breakdowns: housing, groceries, healthcare, utilities, transportation, miscellaneous
- Salary purchasing power calculations from BLS OEWS by occupation
- Tax overlay (income, property, sales) via Tax Foundation
- Retirement composite with tax-friendliness and healthcare access weighting
- Remote-worker geo-arbitrage scenarios
Out of scope
- City-by-city rankings (state averages mask metro variance; use BEA RPP metro tables)
- Quality of life, climate or crime rankings (too subjective for cost-only methodology)
- Per-county rankings (resolution exceeds BEA RPP publication granularity)
- Investment returns or asset allocation
- Personal financial planning advice (consult a CFP)
- Forecasted future cost figures (we publish current and historical, not projections)
YMYL discipline
This is reference content.
Personal cost of living depends on family composition, profession, housing type, benefit coverage and individual lifestyle choices. State averages are a shortlist, not a personal forecast. Use a certified financial planner (CFP), a CPA familiar with the destination state's tax code, and a fiduciary advisor with retirement-income tax experience before making a relocation decision.
Corrections: email hello@digitalsignet.com with the page URL, the figure in dispute and a primary source. We acknowledge within five business days and publish a correction with the source cited inline.
Frequently Asked
Methodology, answered
Why use BEA Regional Price Parities as the anchor instead of C2ER?
BEA RPP is produced by federal statisticians using BLS-priced market baskets and covers all 50 states + DC and 384 metro areas. The methodology is fully public, the underlying data is fully public, and the release cycle is published with the BEA. C2ER is a respected commercial dataset (and we cross-check against it) but the underlying basket and the per-state observations are paywalled. For YMYL content where we want to point a reader at the source, BEA RPP wins.
What does the standard cost of living index include?
The C2ER index includes six categories: housing 28% (apartment rent and mortgage on median home), miscellaneous goods and services 33% (restaurants, clothing, household goods, entertainment), groceries 13% (a specific basket priced quarterly), transportation 12% (gas, vehicle maintenance, transit), utilities 10% (electricity, gas, water, sewer) and healthcare 4% (doctor and dentist visits, retail prescriptions). The weights reflect average household spending.
What does the index NOT include?
Taxes. The C2ER index excludes state income tax, property tax, sales tax and federal taxes. This is a major caveat: a state with low cost of living can still be expensive after taxes (Illinois at 1.97% effective property tax) and a state with high cost of living can be cheaper than it looks if it has no income tax (Washington, Texas). We address taxes on a separate page by layering Tax Foundation state burden data on top of the cost index. The C2ER index also excludes federal taxes (uniform), savings rate, quality of life, education quality, crime, climate and commute time.
How often is the data refreshed?
BEA RPP is published annually (we refresh when the new vintage releases). BLS CPI is monthly. C2ER is quarterly. Zillow ZHVI is monthly. USDA Food Plans is monthly. AAA gas prices are daily (we sample monthly). EIA state energy profiles are monthly. KFF state health data is annual. Tax Foundation burden estimates are annual. Numbers on this site carry a "Verified May 2026" stamp; if it is stale, the source is on the methodology page.
Why do state averages mask city-level variation?
Aggregation. New York state averages 126.5 because NYC pulls the figure up and Buffalo's actual cost is closer to 95. California averages 142.2 because the Bay Area and LA push the average up; Fresno is closer to 105. For metro-level comparisons, BEA RPP publishes the 384 individual metro-area parities (the link is on this page). We use state averages because the audience for page-level rankings is comparing states, not specific metros.
How do you handle differences between BEA RPP and C2ER?
Where the two sources disagree on direction (one says state A is cheaper than state B, the other says the opposite), we lean on BEA RPP and note the disagreement inline. Where they agree on direction but differ on magnitude, we usually publish the C2ER figure (more widely cited, easier for readers to triangulate against other publications) and reference the BEA figure in the methodology table. When the underlying datasets reflect different periods, we time-shift older numbers forward using BLS CPI by region.