Choosing where to live is one of the most consequential financial decisions most people make. The difference between a high-cost city like San Francisco (RPP index ~120) and a low-cost city like Wichita, Kansas (RPP index ~88) can mean tens of thousands of dollars per year in effective purchasing power — even if your nominal salary stays the same.
What is the Regional Price Parity (RPP) Index?
The Bureau of Economic Analysis (BEA) publishes the Regional Price Parity index, which measures the overall price level in a geographic area relative to the US national average of 100. An RPP of 90 means costs are 10% below the national average; an RPP of 115 means 15% above. It accounts for prices of goods, services, and rents — making it one of the most comprehensive cost-of-living measures available.
The Most Affordable Large Cities in 2025
Among cities with populations over 100,000, several standouts offer RPP indices well below 100 while maintaining strong job markets and quality of life. Cities in the Midwest and South consistently rank at the top of affordability lists. Wichita, KS; Toledo, OH; Memphis, TN; and Tulsa, OK all have RPP indices in the 85–92 range — meaning residents enjoy 8–15% lower costs than the national average across all spending categories. These cities also offer median rents well under $1,000/month, compared to $2,500–$3,500 in coastal metros.
Balancing Affordability with Wage Levels
Affordability doesn't mean much if local wages are proportionally lower. The most compelling cities are those where median household incomes are close to national averages but costs are well below. This combination creates the highest real purchasing power. Cities like Columbus, OH; Indianapolis, IN; Raleigh, NC; and Charlotte, NC have historically offered this sweet spot. Always check the income-to-rent ratio: a city where median rent is 20–25% of median household income is far more financially sustainable than one where rent consumes 35–40%.
Rising Stars: Mid-Sized Cities Worth Considering
Several mid-sized metros have seen strong economic growth while maintaining below-average costs. Huntsville, AL has attracted significant aerospace and defense employment while keeping costs modest. Boise, ID saw rapid appreciation but remains cheaper than Pacific Coast metros. Knoxville, TN offers university-town amenities with an RPP around 87. Greenville, SC and Chattanooga, TN have emerged as underrated value destinations with growing economies. These cities combine growing job markets with livable costs — though rapid in-migration is pushing prices up in some of them.
How to Use This Data for Your Decision
Start by calculating your "salary equivalent" — use our salary calculator to see what your current salary would need to be in your target city to maintain the same purchasing power. Then layer in other factors: state income tax, property taxes, commute costs, healthcare access, and personal priorities like climate and culture. The data gives you the foundation; your values and life situation determine the best fit for you specifically.
Methodology
Cost of living data uses BEA Regional Price Parities (most recent available year). Median rent and income data comes from the US Census Bureau's American Community Survey (ACS) 5-year estimates. HUD Fair Market Rents supplement local rent data. City rankings include cities with populations over 25,000 with sufficient data coverage. All data is at the city or metro statistical area level.