Social Security Expansion Act

Raises some Social Security benefits and adds new minimum guarantees for people becoming eligible after 2025; adopts a new price index for cost-of-living adjustments; extends student eligibility for survivor/disability benefits to age 22; changes payroll, self-employment, and investment tax rules tied to a $250,000 threshold; and merges the two Social Security trust funds into a single fund. Many provisions take effect in 2026 or in the first calendar or taxable year after enactment and require the Social Security Administration, Treasury, and IRS to recompute benefits and adjust tax calculations.