The United States publishes two poverty statistics, and in 2024 they disagreed by more than two percentage points. The official poverty rate was 10.6 percent, down 0.4 points from the prior year. The Supplemental Poverty Measure was 12.9 percent, which the Census Bureau reported as not statistically different from 2023. Both figures come from the same agency, cover the same country, and are correct. They count different things.
The official poverty measure
The official measure has been produced since the 1960s and works by comparing a family’s pretax money income to a threshold that varies by family size and the age of the householder. If income falls below the threshold, the family is counted as poor.
Two features of that definition drive most of its behavior. It uses pretax money income, so it does not count tax credits as resources and does not subtract taxes paid. And it counts cash only, so non-cash benefits do not register as income.
The thresholds also do not vary by geography. The same dollar figure applies in the most expensive metropolitan county and the least expensive rural one, which means the measure implicitly treats housing costs as uniform across the country. They are not.
The Supplemental Poverty Measure
The Supplemental Poverty Measure was designed to address those limitations. It does not replace the official measure, and the Census Bureau is explicit on that point. It is a second metric of economic well-being published alongside the first.
The SPM counts resources from government programs and tax credits, so refundable credits and nutrition assistance appear as income. It subtracts necessary expenses that the official measure ignores, including taxes, work expenses, and out-of-pocket medical spending. Its thresholds vary geographically and by housing tenure, with separate figures for owners with a mortgage, owners without one, and renters.
Those adjustments push in opposite directions. Counting benefits as income pulls the measured rate down. Subtracting medical costs and work expenses pushes it up. Geographic adjustment moves individual households in both directions depending on where they live.
Why the SPM came in higher in 2024
The 2.3 point gap in 2024 reflects those offsetting adjustments not cancelling out. Out-of-pocket medical spending and work-related costs, subtracted under the SPM and invisible under the official measure, exceeded the value of the counted benefits for enough households to move the aggregate up.
The threshold updating rules add a second source of divergence, and the Census Bureau quantified it. From 2023 to 2024, SPM thresholds rose 5.8 percent for owners with a mortgage, 5.6 percent for owners without a mortgage, and 5.2 percent for renters. Official poverty thresholds rose 2.9 percent over the same period.
That difference is by design rather than accident. The official thresholds are updated for price change alone. The SPM thresholds were built to capture changes in living standards as well as prices, which means they move with what households actually spend on necessities rather than only with a price index.
The consequence is worth stating directly: a measure whose threshold rises faster will count more people as poor even if nothing about those households changed. Part of the gap between 10.6 and 12.9 is a difference in accounting rules, not a difference in circumstances.
Reading the two numbers together
The useful comparison is not which figure is right. It is what the gap between them reveals.
When the SPM sits below the official rate, government transfers are doing substantial work for the population in question. That pattern has appeared clearly for children in years with expanded refundable credits. When the SPM sits above the official rate, expenses the official measure ignores are large enough to outweigh those transfers.
Either direction tells you something the individual numbers do not. A single poverty rate quoted without saying which measure produced it is close to uninterpretable, and public argument quotes the two interchangeably.
What neither measure captures
Both are threshold measures. They sort households into poor and not poor at a line, and everything about depth and stability disappears in that sorting.
A household at 101 percent of the threshold and one at 300 percent are both counted as not poor. That category holds most of the households that cannot absorb a car repair or a medical bill. The measures were never built to describe them, and using a poverty rate as a proxy for economic security misuses it.
Neither measure captures wealth or debt. Two households with identical income are identical to both measures whether one has savings and no debt and the other has neither. Neither captures duration, so a household poor for one year and one poor for a decade count the same in a given year’s statistic.
And neither is a cost-adequacy standard. The MIT Living Wage Calculator estimates what a household needs to cover food, housing, medical costs, transportation, childcare and taxes in a specific county, and those estimates run well above poverty thresholds. A household above the poverty line is not thereby covering its costs; it is above a statistical threshold set for a different purpose.
Why the distinction matters in practice
Eligibility for many programs is tied to a percentage of the federal poverty guidelines, which are derived from the official measure rather than the SPM. So the measure with the known limitations, no geographic adjustment and no accounting for medical or work expenses, is the one with direct consequences for who receives assistance.
A family in a high-cost county with significant out-of-pocket medical spending can be counted as poor by the SPM, not poor by the official measure, and ineligible for programs keyed to the official thresholds. That is no edge case. It is the predictable result of using a measure that ignores both geography and medical costs to allocate benefits.
Anyone working through what the poverty numbers look like across the country runs into this immediately: the rate you cite determines the story you tell, and the rate that governs eligibility is not always the more accurate one.
The short version
The official poverty measure compares pretax cash income to a national threshold and produced a 10.6 percent rate for 2024. The Supplemental Poverty Measure counts benefits and tax credits as resources, subtracts taxes and medical and work expenses, adjusts for local housing costs, and produced 12.9 percent. The Census Bureau publishes both, in Poverty in the United States: 2024. Neither is a measure of whether a household can cover its costs.