What percentage of Americans make less than $40,000? — Explained

How the us population living below poverty line relates to people earning under $40,000

What the question asks and why the denominator matters

The phrase us population living below poverty line is often used as a search anchor, but the specific question about who makes less than $40,000 depends on the unit of measurement and the income definition. In this article we follow Census conventions for pre-tax money income when reporting the share below $40,000 and explain why that choice matters for interpretation.

The Census defines money income as cash income before federal and state taxes and generally excluding most in-kind benefits. That means published ACS and CPS numbers count earnings, retirement income, and cash transfers in pre-tax terms, but they do not track after-tax resources or noncash benefits without special adjustment. For guidance on these definitions see the Census methods documentation Census methodology on income concepts.

Using pre-tax money income is standard for cross-sectional reporting, but analysts sometimes prefer after-tax or resource-based measures when they want to capture disposable income or the value of in-kind supports. Those alternative measures can materially change how many people appear under a given nominal threshold, so it is important to state the income definition alongside any share you report.

Primary data sources to cite: ACS, CPS ASEC, and SCF

What each source measures and its typical use

The American Community Survey, especially the 1-year estimates, is the standard source for household income distributions and for tables that show income in fixed bins such as below $40,000. For household summaries and national tables cite the relevant ACS table directly ACS table B19001.

The Current Population Survey Annual Social and Economic Supplement, known as CPS ASEC, underlies the Census annual report on income and poverty and provides person and family income series used for labor market and poverty analysis. When the focus is individual earnings or person-level counts use CPS ASEC tables as the primary reference Income and Poverty in the United States: 2023.

Which tables and series to cite for an article

For household bins use ACS B19001. For person and family series use CPS ASEC person and household tables referenced in the Census annual report. If you plan to discuss after-tax resources or broader measures of economic well being, note that the Federal Reserve’s Survey of Consumer Finances provides complementary data but follows different conventions and cycles Survey of Consumer Finances documentation.

Label each table with the exact table ID, the survey year, and the income definition so readers can check the source directly. Data platforms such as data.census.gov allow linking to the specific table view for ACS B19001 and related series. For a direct table view see ACS B19001 table.

Household versus individual measures: which number answers the question?

How combining earners changes household totals

Households often include more than one earner, so a household-level share under $40,000 tends to be smaller than a person-level share. That difference is why the same nominal threshold can show very different shares depending on whether you count households or individuals; CPS ASEC person tables and ACS household bins illustrate this contrast in practice Income and Poverty in the United States: 2023.

For example, a married couple with two earners each making $30,000 would be above $40,000 at the household level but each earner is individually under $40,000. Use household statistics when the reader needs a sense of combined household resources, and use person-level statistics when the focus is labor market outcomes or individual earnings.

When to prefer person-level statistics

Person-level statistics are preferable when analyzing wages, employment, or the share of individual earners below a threshold. Household statistics are preferable for discussing household budgets, housing affordability, or eligibility rules that depend on combined household income. Always label which denominator you use and cite the exact table so readers can reproduce the number.

What the 2023 Census data show about shares under $40,000

Headline household share from ACS 2023

According to the ACS 2023 household income distribution, roughly one third of U.S. households reported pre-tax money income below $40,000 in 2023. That household headline is most directly read from the ACS B19001 table and is the standard way journalists report shares below fixed nominal thresholds ACS table B19001.

Because this is a pre-tax money income measure the figure excludes most in-kind benefits and does not reflect after-tax resources. If a story needs to show disposable income or the effect of taxes and noncash programs, state that explicitly and consider using SCF or other resource measures for comparison Survey of Consumer Finances documentation.

How CPS ASEC person shares compare

CPS ASEC person-level series show a larger share of individual earners with total personal earnings below $40,000 than the household share, because households can combine multiple earners into a single household income total. For person-focused reporting refer to the CPS tables used in the Census annual report so readers can see the person series directly Income and Poverty in the United States: 2023.

When presenting both household and person shares side by side, label each column carefully and remind readers that the two series measure different units and cannot be compared without that context.

Who is more likely to fall under $40,000: age, region, and household composition

Patterns by age and region

ACS and CPS 2023 data indicate higher shares under $40,000 among households headed by younger adults and in the South, while the Northeast and some Western metro areas tend to show lower shares after adjusting for household size and cost differences. For regional comparisons it is useful to reference a focused analysis such as the Pew breakdown of income by age and region Pew Research Center analysis. Additional spatial data are available from mapping layers such as ACS Household Income Distribution Variables.

These geographic and age patterns reflect both labor market differences and compositional factors. Areas with younger household heads or fewer dual-earner households will show higher household shares under a fixed nominal threshold than areas with larger households or higher labor force attachment.

Role of household size and multiple earners

Household size changes how a threshold maps to economic well being. A single-person household with $35,000 in pre-tax income may face different affordability challenges than a four-person household with the same income. Where feasible, present per-person measures or median equivalized income alongside nominal bins to help readers compare across household types.

When writing for voters in a congressional district, providing a short note about local household composition and the chosen denominator helps readers apply national figures to local circumstances.

A practical framework for choosing a measure and building tables

Step-by-step: pick denominator, pick source, label clearly

Follow these four steps when preparing tables that report shares under $40,000: define the research question and the unit of analysis; choose the data source that matches that unit; extract the exact table ID and year; and label the table with the denominator and income definition. Use ACS B19001 for household bins or CPS person tables for individual series as appropriate ACS table B19001.

Decide early whether to report pre-tax money income or after-tax resources. If you choose pre-tax money income, note that explicitly in figure captions and link to the Census methods guidance so readers can find the full definition Census methodology on income concepts.

Suggested table columns and figure captions

A simple national household table that is easy to reproduce can include three columns: income bin, share of households, and source with table ID and year. Example bins are below $40,000, $40,000 to $80,000, and above $80,000, and the caption should include the phrase pre-tax money income and the ACS table ID.

For regional charts include a note on whether you used 1-year ACS estimates or pooled multi-year estimates for smaller geographies and explain that multi-year estimates trade timeliness for greater statistical reliability.

Common mistakes and pitfalls when reporting income shares

Mixing pre-tax and after-tax measures

A frequent error is mixing Census pre-tax money income with after-tax resource measures without clear labeling. That mix can change the reported share below a nominal threshold substantially. Always state whether the numbers reflect pre-tax money income or an after-tax resource concept and cite the methodological source when in doubt Census methodology on income concepts.

Another common pitfall is presenting household and person rates as if they measure the same thing. Make the denominator explicit in every table and caption and avoid combining the two without explanation.

Comparing regions without adjusting for cost or composition

Raw regional comparisons can mislead if they ignore cost-of-living differences or household composition. When possible, present comparisons that control for household size or use equivalized income measures, and explain the limitations of raw bin-to-bin comparisons when you cannot adjust for these factors Pew Research Center analysis.

Where a story mentions changes over time, note whether you are comparing nominal thresholds or inflation-adjusted amounts and link to the Census trend tables or annual report to provide context for sample changes and methodological notes Income and Poverty in the United States: 2023.

Practical examples and suggested visuals for a voter-facing piece

Example 1: national household table

A compact, voter-facing table can show three rows: below $40,000, $40,000 to $80,000, and above $80,000, with a column for share of households and a final column that cites the ACS B19001 table and year. The caption should state pre-tax money income and the table ID so readers can verify the numbers ACS table B19001.

Keep the layout simple and place the source line directly under the table. For examples and updates see the news page.

Example 2: regional comparison chart

For a regional bar chart plot the share of households under $40,000 by Census region or by metropolitan area, and include error bars if you use ACS estimates that have margins of error. Cite either ACS regional tables or a Pew analysis that breaks down income by age and region for interpretation Pew Research Center analysis.

Write figure captions that include the survey, table ID, year, and income definition. This practice makes the visual reproducible and helps nontechnical readers understand the basis for the numbers.

Trends 2019 to 2023: what changed and what stayed similar

Short trend summary and reasons to be cautious

Census trend tables and the annual report show only moderate movement in shares under nominal thresholds such as $40,000 between 2019 and 2023 once analysts account for inflation and sample changes. Avoid claiming dramatic directional shifts without noting these methodological caveats and cite the Census annual report for trend context Income and Poverty in the United States: 2023.

When showing year-to-year charts, use inflation-adjusted dollars if you mean to compare real purchasing power, and explain any sample design changes that might affect comparability across years.

How to report year-to-year movement

Report percentage-point changes and include margins of error or confidence intervals where possible. If the change is within the margin of error, note that it may not reflect a statistically meaningful shift. Linking the trend figure to the ACS or CPS table used for the series allows readers to examine the underlying estimates directly.

Conclusion: what to report and which primary sources to link

Quick checklist for publication

Before publication confirm these items: state the denominator, state that income is pre-tax money income if you use Census measures, include the table ID and year in captions, and link the table so readers can verify the number. For household bins link ACS B19001 and for person or family series link the CPS ASEC tables in the Census annual report ACS table B19001. For more on the author and background, see about.

When discussing after-tax resources or the role of noncash benefits, link to the SCF documentation and explain the difference in measurement conventions. Clear labeling and direct links to the primary table are the best way to keep reporting accurate and reproducible Survey of Consumer Finances documentation.