Regional Price Parity, explained

The government publishes a free, official answer to "how expensive is this state?" Almost no cost-of-living site uses it. Here's what it is and how to read it.

By statenumbers.com · July 20, 2026 · 5 min read

Regional Price Parities — RPPs — are produced annually by the US Bureau of Economic Analysis. They measure the difference in price levels across states and metro areas, expressed as a percentage of the national average. The national average is always 100. A state at 108 is 8% more expensive than the country overall; a state at 88 is 12% cheaper.

That single sentence is more than most cost-of-living tools will tell you about their own numbers, because most are built on the C2ER Cost of Living Index — a proprietary, licensed dataset. RPP is different: it's public, its methodology is published, and anyone can reproduce a figure from the source.

What it actually measures

RPP is built from the prices of a broad basket of goods and services, and BEA breaks it into components so you can see why a place is expensive, not just that it is:

• Housing (rents) — usually the biggest source of variation between states.
• Goods — food, fuel, and other tradeable items, which vary the least.
• Utilities and other services — the rest of the basket.
• All items — the headline index that combines them.

Housing does most of the work. California's all-items index is high largely because its rents run more than 50% above the national norm; its goods prices are barely above average. You can see this split on any cost-of-living page.

How to read it correctly

Three habits will keep you from misusing it:

1. It's a price level, not a budget. RPP tells you how far a dollar goes, not how much you personally spend. Combine it with your own rent and lifestyle.
2. State averages hide cities. A state figure blends its expensive metros with its cheap rural areas. BEA also publishes metro-level RPPs for finer detail.
3. Pair it with income. A high price level isn't bad if wages are higher still. Dividing income by the price level gives real purchasing power — the number that actually matters.

The one real limitation

RPP is annual, and it's released with a lag of roughly 14 months. The 2024 figures came out in February 2026. That's slower than you might like, but it's the trade-off for official, methodologically sound data — and it's a limitation shared by every honest source. We show the vintage and release date on every page rather than hiding it.

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