Methodology & source manifest
Everything on the Social Security Administration monitor derives from public records — the SSA FY2027 Budget Overview, OMB's Historical Tables, the USAspending API, and reachable SSA OIG and GAO oversight documents. This page is the audit trail: method, sources, validation, and every flag.
Method
Mandatory benefits vs. discretionary administration (+ on-/off-budget)
SSA's defining structural fact is that its budget is two budgets of wildly different size. Almost all of it — roughly $1.8 trillion — is mandatory benefitspaid directly to beneficiaries: Old-Age & Survivors Insurance and Disability Insurance (the OASDI trust funds, off-budgetby law) plus Supplemental Security Income (on-budget, general fund). The part Congress sets each year to runthe agency is the Limitation on Administrative Expenses (the LAE), about $15 billion — less than 1% of the benefits paid. This monitor keeps the two dialects strictly separate, never sums the $1.8T benefits into a single “agency budget,” and surfaces the on-/off-budget distinction rather than hiding it.
The reconciliation
The discretionary administration is built from the LAE object-class rows, asserted to sum to the Budget Overview's published LAE total, and the full discretionary topline (LAE + Research & Demonstration + the OIG) to the published “Total, Budget Authority” — these tie to the dollar (million). The mandatory benefits (OASDI trust funds + SSI) are asserted to sum to the published benefits total within the source's own one-tenth-of-a-billion rounding (its footnote: “Totals may not add due to rounding”). Where that rounding tolerance is used, the gap is flagged below — never absorbed into an account.
Source documents & validation ledger
The history layer is shown in nominal dollars only — OMB Historical Table 5.2 publishes no constant-dollar basis, and no deflator is synthesized. Spine figures are in $ millions (benefits converted exactly from the source's one-decimal-billion table); USAspending figures are in dollars. The $1.8 trillion in mandatory benefits is never folded into the discretionary administration figure — the defining discipline of this monitor.