Methodology · One-pager
The Reality Index isn't an attack on inflation statistics. It's an attempt to make visible the gap between what the government measures and what families actually experience — and to say honestly where that gap is, and isn't, large.
The Consumer Price Index, published monthly by the Bureau of Labor Statistics, is the single most important economic statistic in American life. It determines Social Security cost-of-living adjustments, federal income tax brackets, the Federal Reserve's interest rate decisions, every major union contract, and the dollar's purchasing power as the press reports it. When you read that "inflation came in at 3.2% last year," that number is CPI.
And for many things, CPI is approximately correct. The price of a pound of chicken breast really did grow more slowly than the average basket of consumer goods over the last forty-five years. The price of electricity really did. The price of a loaf of white bread really did. Industrial production, scale, and global trade made those things cheaper in real terms, and CPI captures it.
But for the items most families spend most of their money on, CPI tells a story that does not match lived experience. The Reality Index exists to show the gap.
The Reality Index tracks the actual retail price of fifteen specific items over the longest available history. Each item is a fixed, unchanging specification — a dozen Grade A Large eggs, a kilowatt-hour of residential electricity, an annual family premium for employer-sponsored health insurance, a year of public four-year in-state tuition. These are the things real families buy in real units, year after year.
For each item, we publish three lines:
The gap between the first line and the third line is the Reality Index. The gap between the first and second is what we call methodological drift — the difference between what BLS's own retail data says and what BLS's own published CPI subindex says about the same category. Where that gap is large, something is happening inside the methodology that warrants explanation.
We do not claim CPI is faked. Several of our items grew more slowly than CPI, not faster. We report those honestly. The Reality Index is not a political tract — it is a measurement framework that tells a more granular story than a single national inflation number can.
We do not claim our basket represents the average American household budget. The Bureau of Labor Statistics' Consumer Expenditure Survey is more comprehensive than what we measure, and a complete household budget includes spending categories the Reality Index does not currently cover (entertainment, restaurants, vehicle purchases, vacations). We expect to add these in future versions.
We do not claim that price equals cost. A pound of ground beef in 2025 may have less marbling, smaller portion sizes on the shelf, or different breeding than the same product specification in 1984. Where we know quality has shifted, we note it. CPI calls this hedonic adjustment. The Reality Index does the opposite: we hold the specification constant and let the price float, because that is what consumers experience when they go to buy the thing.
When the price of beef goes up, some families substitute chicken. CPI's methodology accounts for this. By the time it reaches the headline inflation number, the basket has shifted toward whatever consumers can still afford. The Reality Index does not do this. It tracks the unchanged thing year over year, regardless of whether anyone is still buying it at that price.
This is a choice. It is not a better or worse choice — it is a different one. CPI is designed to measure the cost of maintaining a constant standard of living, where "standard of living" is itself defined by what people are buying. The Reality Index is designed to measure the cost of maintaining a constant material specification of consumption. Both are real questions. They produce different numbers.
Where CPI does this most aggressively is in housing, where the Bureau of Labor Statistics uses something called "Owners' Equivalent Rent" to impute a hypothetical rental cost for homeowners rather than tracking the price of homes themselves. The Reality Index uses the FHFA House Price Index for home prices and the BLS Rent of Primary Residence subindex for rentals — both are real measures of what real housing costs. Over the last fifty years, FHFA home prices grew at roughly twice the rate of headline CPI. Over the last twenty-five years, family health insurance premiums grew at roughly two and a half times the rate. Over the last forty-five years, public university tuition grew at roughly three and a half times the rate. These are not small gaps.
Meanwhile, chicken breast ran 57% slower than CPI. Whole milk ran 22% slower. White bread tracked CPI almost exactly. Electricity ran 17% slower. These items got more affordable in real terms, even as the items families can't substitute away from — shelter, health care, education — got dramatically more expensive.
This is the pattern the Reality Index makes visible. CPI gets the cheap stuff right, where industrial scale and global trade actually did drive prices down. It gets the expensive stuff wrong, where its substitution and quality adjustments understate inflation in the categories that dominate household budgets and that families have no realistic way to escape.
Reality Index is built to be as accurate as possible, not as accurate as it is today. If we identify a more rigorous data source, a methodology improvement, or a measurement error — whether through our own continued research, reviewer feedback, or critique from readers — we will publish the update, announce the change in /news, and revise the affected pages with a timestamped methodology note. The goal is to be the most honest reference number for what inflation has actually cost American families, which requires being willing to revise the methodology when revision is warranted.
The official inflation rate is the lens through which America evaluates its own economic experience. When that lens systematically understates the price growth of the things families cannot avoid buying, the result is a population that knows it is being squeezed but cannot find a credible economic statistic that confirms it. That gap between official numbers and lived experience corrodes trust in institutions, in expertise, and in measurement itself.
The Reality Index does not exist to attack CPI. CPI is doing exactly what it was designed to do — and what it was designed to do is not always the same thing as what families want to know. The Reality Index is designed to tell families how much more expensive the things they actually buy have become, in unadjusted real-world dollars, against the unchanged specifications they actually want to purchase, over the longest available historical record.
When the two stories agree, we report that. When they disagree, we publish the gap.