Double Major or Minor? What the Earnings Data Actually Says

The number of students double-majoring has jumped 25% at major public universities over the last decade. Whether that second major actually pays — or just adds a semester of tuition — depends on one specific thing the research is very clear about.

The double-major surge is real and it is recent. The Hechinger Report documented in late 2025 that the University of Wisconsin–Madison has seen its double-major share grow 25% over the last ten years, with parallel increases at UC San Diego, UNC Chapel Hill, and private-nonprofit universities across the country. Seventeen percent of 2023–24 bachelor’s-degree recipients also finished college with at least one certificate.

This is not a fashion trend. It is a hedge against a labor market that genuinely rewards students less than it did five years ago. And the critical question — do the extra credits actually pay? — has a much more specific answer than “yes” or “no.”

Why Students Are Hedging Right Now

Start with the labor market the hedge is responding to. The Federal Reserve Bank of New York’s ongoing Labor Market for Recent College Graduates tracks unemployment and underemployment for 22–27-year-olds with a bachelor’s degree. The numbers have deteriorated measurably.

The St. Louis Fed’s August 2025 analysis documented that young college graduates between ages 23 and 27 now face an unemployment rate averaging 4.59% in 2025, compared with 3.25% for the same demographic in 2019. Even more striking: young college graduates are currently spending more time unemployed than job seekers with only a high school diploma, with 37.1% of unemployed bachelor’s-holders aged 22–27 finding work or exiting the search each month versus 41.5% of their high-school-only peers.

That is the context for the double-major trend. Students are adding credentials because the first one is not carrying the weight it used to.

What the Earnings Research Actually Shows

The core question — “does a double major earn more than a single major?” — has been studied more than most people realize, and the pattern is consistent.

A 2021 paper published in the Columbia Economic Review found that pursuing a double major almost always predicts greater earnings than pursuing either component major alone. But the headline gets misleading when stopped there. The effect is overwhelmingly concentrated in specific combinations: the largest earnings premium shows up for graduates who combine business with STEM, two business majors, or two STEM majors — a roughly 40%+ earnings boost relative to double majors with neither STEM nor business.

This maps directly to earlier work. A 2016 paper by Del Rossi (St. Lawrence University) and Hersch (Vanderbilt Law School) concluded that students who paired a business major with a second major in science, technology, engineering, or math earned more than if they had majored in only one of those disciplines. And a 2012 Vanderbilt Curb Center study — examining motivations and outcomes of double-majoring — found that graduates who double-majored in engineering and natural sciences had an average starting salary of $78,342, while those who paired education with a social science averaged $45,491.

The Georgetown Center on Education and the Workforce’s October 2025 Major Payoff report adds a crucial frame: within any single major field, earnings vary enormously — STEM bachelor’s holders range from $64,000 (miscellaneous agriculture) to $146,000 (petroleum engineering) for prime-age workers. Variation within a major frequently exceeds variation between majors. Translation: which major pairs you pick matters far more than whether you double-major at all.

When a Double Major Does Not Pay

There are identifiable cases where a second major is either neutral or slightly negative in ROI terms:

Two humanities majors. History plus English, sociology plus philosophy — the earnings premium shrinks toward zero. You are signaling depth, but employers rarely pay more for it.

Opportunity cost of a delayed graduation. If a second major pushes your graduation by a semester, you are trading approximately half of a first-year salary ($28K–$35K median) plus an additional semester’s tuition — often $10K–$25K. That cost has to be earned back from the earnings premium, which, for non-crossing majors, may never happen.

Internship displacement. A double major that occupies summers with required courses means fewer summers for internships. The Cengage 2025 Employability Report data we covered identified internships as one of the single strongest predictors of getting hired — substantially stronger than the degree itself. Trading one for the other is usually a bad swap.

Signaling-only motivation. If the reason for the second major is “it will look good on a resume,” the market generally disagrees. Employers who review resumes at volume rarely read past the primary major line — they look at relevant skills, relevant internships, and the institution.

The Minor — The Under-Rated Alternative

A minor typically requires about a third of the credits of a major (commonly 15–24 credits vs. 36–60). For a large subset of career paths, the career-signaling benefit of a minor is comparable to a second major. Which minors carry genuine employer weight?

• Statistics or Data Science — paired with almost anything, legitimately moves resumes
• Computer Science — the single highest-leverage minor for non-CS majors
• Economics — signals quantitative literacy for finance, consulting, policy roles
• Business / Management — useful for humanities, sciences, engineering majors heading to industry
• A language relevant to your target industry — Spanish for U.S. healthcare and education; Mandarin for certain tech and trade roles

A humanities major + a statistics minor + one strong internship often outperforms a humanities + humanities double major on both earnings and hiring probability. The time cost is roughly a quarter — sometimes less.

The Third Option: Major + Certification

Certifications have quietly become the dominant strategy. Seventeen percent of 2023–24 bachelor’s graduates finished with at least one certificate alongside their degree. That share is rising, and employers — especially in the skills-based hiring shift we covered — are increasingly using specific certifications as entry-level filters.

The cost comparison is striking. A second major may cost 40+ credits and a semester; a targeted Google, AWS, HubSpot, PMI, or similar certification costs between $0–$500 and a few weeks to a few months of self-paced study. For most non-STEM majors, the certification is likely a better ROI than a second major.

We covered the specific combinations in depth in our humanities-plus-certification playbook — the pattern generalizes.

How to Decide — A Three-Question Framework

Before committing to a double major, work through three questions in order.

1. Does the second major cross an earnings category? If your primary is humanities or education and your second is STEM, business, or quantitative, the research supports real earnings upside. If both sit in the same earnings band, the premium is small. Our college majors directory is a useful starting point for comparing earnings ranges by field.

2. Would the time cost be better spent on an internship or certification? If the second major pushes graduation, costs you a summer of internship opportunity, or consumes 40+ credits — compare that honestly to the alternatives. A full-time internship at a target employer is frequently the highest-leverage use of that time.

3. Is graduation delay baked in? Double majors completed within four years have much better ROI than those that extend you to five. If your plan requires an extra semester, run the numbers — tuition + foregone salary + interest on loans — against the earnings premium research supports.

If you are still early in the selection process, the best value colleges rankings filter institutions by completed-program ROI — a useful lens for thinking about major-plus-minor combinations that keep total cost low.

The Bottom Line

A double major pays off when the two majors sit in different earnings categories — especially when business or STEM is one of them. It rarely pays when both sit in the same earnings band, when it delays graduation, or when it displaces a strong internship.

For the majority of students, the highest-ROI strategy is not a second major. It is a thoughtfully chosen minor or certification — typically Stats/CS/Econ/Business — plus one strong internship. The research has been consistent on this for more than a decade. The new pressure from a tougher entry-level labor market makes the calculation sharper, not different.

Pick majors by fit and by earnings crossover, not by resume aesthetics.

Sources

• Hechinger Report — “College students hedge their bets in a chaotic labor market by double-majoring” — 2025 — hechingerreport.org/students-worried-about-getting-jobs-extra-majors
• Journalist’s Resource (syntheses of Columbia Economic Review 2021, Del Rossi & Hersch 2016, Vanderbilt Curb Center 2012) — “Double majors: Influences, identities and impacts” — journalistsresource.org/economics/double-majors-influences-identities-impacts
• Georgetown Center on Education and the Workforce — “The Major Payoff: Evaluating Earnings and Employment Outcomes Across Bachelor’s Degrees” — October 2025 — cew.georgetown.edu/cew-reports/major-payoff
• Federal Reserve Bank of New York — “The Labor Market for Recent College Graduates” — newyorkfed.org/research/college-labor-market
• Federal Reserve Bank of St. Louis — “Recent College Graduates Bear Brunt of Labor Market Shifts” — August 2025 — stlouisfed.org/on-the-economy/2025/aug/recent-college-grads-bear-brunt-labor-market-shifts