A Social Security Administration (SSA) Research and Statistics Note providing cross-sectional demographic and economic profiles of all noninstitutionalized Disability Insurance (DI) and Supplemental Security Income (SSI) program participants in December 2010. Data source is the 2008 Survey of Income and Program Participation (SIPP) (waves 7–8) matched to SSA administrative records; income measured for the four-month window September–December 2010; weights calibrated to December 2010 SSA administrative totals, adjusted for institutional status. The paper's principal contribution is systematic documentation of both programs simultaneously using identical methodology, enabling direct comparison of DI and SSI populations on poverty, income composition, health insurance, and program dependence.
DI scale and composition: 8,993,173 DI beneficiaries in December 2010. Of these, 89% were disabled workers; 11% were disabled adult children or disabled widow(er)s. Male (51.3%), white non-Hispanic (74.9%), Hispanic (10.7%), Black (12.7%). 20% of DI beneficiaries also receive SSI (concurrent receipt).
DI marital and education profile: Married 38.6%; divorced/separated 25.5%; never married 28.1%. Education: 16.9% with less than 12 years, 38.4% with exactly 12 years (high school (HS) diploma), 27.9% with some college (13–15 years), 16.8% with a college degree or more. The DI population is substantially less educated than the general working-age population.
DI income dependence: Social Security benefits (including DI) constitute 57.7% of mean family income; earnings constitute 22.7%. For more than half of all DI beneficiaries, DI represents 75–100% of their personal income — they have essentially no other income source. This makes DI the primary budget constraint governing poverty status.
DI poverty and anti-poverty impact: 19.5% of DI beneficiaries fall below the federal poverty threshold. The education gradient is sharp: 32.8% poverty rate for those with fewer than 12 years of education vs. 10.0% for those with 16 or more years. Counterfactual simulation: absent DI benefits, 50.5% of beneficiaries would be in poverty; DI reduces the aggregate poverty gap (the total dollar shortfall below the poverty line) by 87.3%.
DI health insurance: Medicare 64.3% (reflecting the 2-year DI waiting period — only long-duration beneficiaries qualify); Medicaid 42.7%; private insurance 32.5%; uninsured 7.7%. Medicare coverage is limited in year 0–1 because the 24-month waiting period has not been satisfied; early-duration beneficiaries rely on Medicaid or are uninsured.
DI material resources: 59.2% own their homes; 31.9% receive Supplemental Nutrition Assistance Program (SNAP) benefits; 7.6% receive energy assistance; 2.4% receive housing assistance.
SSI scale and age distribution: 7,497,490 SSI recipients in December 2010. Age breakdown: children under 18 = 1,193,848 (15.9%); working-age adults 18–64 = 4,367,934 (58.3%); aged 65+ = 1,935,708 (25.8%). The program serves three demographically distinct populations.
SSI demographic profile: 56.7% female (in contrast to DI's male majority); 30.5% Black; 20.5% Hispanic; 43.2% white non-Hispanic. The SSI racial composition differs markedly from DI — SSI is not a work-history-based program and draws more heavily from populations with weak labor market attachment.
SSI income levels and composition: 58% of SSI recipients had four-month personal income under $3,000 (i.e., under $750/month); 60% had four-month family income under $7,500 (under $1,875/month). Federal SSI benefit rate in 2010: $674/month individual, $1,011/month couple. Income composition: SSI itself = 43.9% of total income; Social Security (Old Age and Survivors Insurance (OASI)/DI) = 22.0%; earnings = 22.5%. SSI is the primary income source for most recipients.
SSI poverty and anti-poverty impact: 42.9% of SSI recipients fall below the federal poverty threshold. Counterfactual: absent SSI benefits, 65.3% would be in poverty. SSI reduces the aggregate poverty gap by 71.3%. Despite this reduction, the post-SSI poverty rate remains extremely high — SSI lifts many recipients above the poverty line but leaves nearly half still below it.
SSI health insurance: Medicaid coverage is nearly universal — 94.9% of SSI recipients are enrolled in Medicaid (in most states, SSI automatically confers Medicaid eligibility). Only 2.2% are uninsured, compared with 7.7% of DI beneficiaries.
This paper is a pure descriptive statistics document — no causal identification, no treatment effects. Its value is as a 2010 benchmark for both programs simultaneously with consistent methodology. The 19.5% DI poverty rate (vs. 50.5% counterfactual) is the most policy-relevant single number: it quantifies DI's anti-poverty function at a moment when the program is most commonly discussed as a work-disincentive program. The 87.3% poverty-gap reduction is particularly striking — it means DI doesn't just push people above the threshold, it nearly eliminates the entire dollar shortfall for those it reaches.
The comparison with the Weaver (2020) figure (25.3% poverty for "Social Security (SS) beneficiaries" in the 2014 SIPP) deserves a methodological note: Weaver defines "SS beneficiaries" as anyone who ever received SS benefits in the 2014 SIPP sample, which includes OASI retirement beneficiaries in the data; the Stegman Bailey definition is specifically current DI beneficiaries in December 2010. The period difference (2010 vs. 2014) and population difference (active DI only vs. ever-received SS) plausibly explain the gap.
SSI's 42.9% post-benefit poverty rate is sobering — despite a 71.3% poverty-gap reduction, the benefit level ($674/month) is simply too low to bring most recipients above the poverty line. This is a structural feature of the program, not a measurement artifact.