How Changing Income Patterns Have Worsened Social Security’s Finances

The Social Security trustees project that unless the federal government acts, the program’s combined trust fund will run out in 2034, leaving Social Security able to fund only about 80 percent of promised benefits. Most Social Security analysts blame the program’s financial challenges on demographic pressures. However, a main driver has been changing income patterns that have eroded Social Security’s revenue base. Drawing on data from the Social Security Administration and the Bureau of Economic Analysis, this report measures the impact of those economic changes on Social Security’s finances. Read the full report.

Key Takeaways:

• The share of gross domestic product (GDP) subject to Social Security’s payroll tax, the program’s primary income source, has declined steadily over the past four decades, falling from 41 percent in 1984 to 34 percent in 2025.
• If payroll tax revenue had not fallen relative to GDP, Social Security would have collected an additional $10.8 trillion between 1984 and 2034.
• That additional revenue would have provided Social Security with enough resources to pay full benefits until 2059, 25 years longer than the Social Security trustees now project. 
• Some lawmakers have proposed lifting the payroll tax cap and taxing some investment income for high earners, which would bring revenue as a share of GDP back toward historical levels, strengthening Social Security’s finances without burdening lower- and middle-income workers.