Study finds college grads outearn non-degree workers within 15 years

College can still pay, but the size and speed of that payoff depend heavily on what students study. In a Texas analysis that tracked about 29,000 public-college students who entered bachelor’s programs in the 2008-09 academic year, graduates outearned people with only a high school diploma by almost $87,000 over 15 years, even after tuition, room and board, and lost wages were subtracted.

The Postsecondary Commission measured what it called cumulative net value-added earnings, a calculation designed to capture the full economic trade-off of enrolling in college. By that measure, engineering and architecture majors posted the strongest returns, while liberal arts graduates, often treated as a weak case for college ROI, still came out about $35,000 ahead of non-degree peers.

The study sits inside a much larger Texas project that examined nearly one million students in public higher education from 2008-09 through 2018-19, including 309,213 bachelor’s-degree seekers at 29 public institutions. That scale matters because it shows the earnings story is not just about a handful of selective campuses or elite majors. It also reinforces a central reality in the college-value debate: even when students borrow, pay tuition, and spend years out of the labor force, many still end up ahead.

Still, the Texas numbers should not be mistaken for a national verdict. The state’s labor market, degree mix, and wage structure can differ from other parts of the country, which means the payoff in Texas may not map neatly onto every region. Even so, the direction of the evidence lines up with broader research. Georgetown University Center on Education and the Workforce says prime-age workers with a bachelor’s degree earned 70 percent more at the median than workers with only a high school diploma, with median earnings ranging from $58,000 in education and public service fields to $98,000 in STEM.

That gap is why the distinction between a high-return major and a merely high-salary major matters. Georgetown’s ROI tool, built from College Scorecard data, calculates returns at 10, 15, 20, 30 and 40 years after enrollment, underscoring that the timing of the payoff can matter as much as the size of the final paycheck. A 2024 study in the American Educational Research Journal found engineering and computer science had the highest lifetime returns, followed by business, health, and math and science, while education, humanities, and arts ranked lowest.

The college premium is real, but the Texas data show it arrives unevenly and often slowly. For students weighing tuition debt against future earnings, the decisive question is not whether college can pay off, but how long it takes, and which credentials actually clear the bar.