A degree does one of two jobs, and they are not the same job. Either it is a legal or contractual precondition for doing the work, or it is a proxy — a rough signal that you can read, write, finish things and absorb instruction. The first is non-negotiable. The second is substitutable, and increasingly substituted.

Most of the argument about whether university is worth it goes wrong because it treats these as one question. They are two, and you can tell within an afternoon which one you are facing.

Where it is genuinely mandatory

In regulated professions the degree is a gate, not an advantage. No portfolio gets you past it.

  • Medicine, dentistry, pharmacy, nursing and allied health. Registration with the regulator requires an accredited qualification, and the accreditation matters as much as the degree.
  • Law. Routes differ sharply by market. England and Wales now allow a non-law degree plus assessment; most US states require an accredited law degree; continental European systems are more prescriptive still.
  • Engineering with statutory sign-off. Chartered or professional engineer status runs through accredited degree routes in most jurisdictions.
  • Teaching in state schools, veterinary practice, architecture, clinical psychology. All gated, all with their own accreditation list.

The instruction here is narrow: check the accrediting body's list of approved programmes in the country where you intend to practise, before you enrol. Recognition across borders is patchy and conversion is slow. This is a thirty-minute check that people routinely skip.

Where it is a proxy

Everywhere else. Software, marketing, sales, operations, design, finance outside the regulated roles, and nearly all of the private sector.

Here the degree is a filter rather than a requirement, and filters can be bypassed. Employers substitute for it in predictable ways:

  1. Demonstrated work. A portfolio, a shipped product, a repository, a campaign you can explain end to end. In technical and creative fields this is the strongest single substitute.
  2. Apprenticeships and structured entry schemes. In the UK, degree and higher apprenticeships are a genuine parallel route into professional work, often employer-funded. Germany, Switzerland and Austria have far deeper vocational systems. The US has fewer formal routes and leans on internships.
  3. Internal progression. Starting in a support or junior role and moving across is common, and in many organisations the degree requirement quietly evaporates once you are inside.
  4. Verifiable certifications. Useful in cloud, security and delivery management. Weaker elsewhere.

These substitutes work, but they cost time and they work unevenly. Graduate schemes at large firms, most consultancies, and public sector fast-track entry still screen on degree class. If those are your target, the substitute route is harder.

The arithmetic nobody does

Add the direct cost — fees, materials, any relocation. Add the earnings you forgo while studying, which for three years of full-time study is usually the largest number in the calculation and the one people omit.

Set that against the realistic salary difference in your target market, not the national average graduate premium. Look at live postings for the role you want and compare what they pay against what people with your current profile earn. If the gap is small, the degree is buying optionality rather than income — which may still be worth it, but you should know that is what you are buying.

Finally, be honest about completion. An unfinished degree carries the cost without the credential. If your circumstances are unstable, weight that heavily.

The two-question test

  • Is the qualification named on the accrediting body's list for the work you want to do in the country you want to do it in? If yes, the decision is made — the only question is which programme.
  • If not, take twenty live postings for your target role and count how many state a degree as a hard requirement rather than a preference. That number, not a national statistic, is your filter rate.

Part-time, distance and employer-funded routes

If you need the credential but the arithmetic is bad, the answer is usually to change the delivery rather than abandon the plan.

Part-time and distance study removes the forgone-earnings problem, which is the expensive half. It costs longer elapsed time and real strain, and completion rates are lower. A fixed weekly study slot in the calendar matters more than any study technique.

Employer funding is more available than most people assume and almost never advertised. Ask what the policy is, in writing, including what happens if you leave within a set period — clawback clauses of one to two years are common. In the UK, apprenticeship levy funding pays for some degree-level study outright. In the US, tuition assistance is standard at larger employers and often unclaimed.

The most expensive degree is the one taken full-time, at list price, in a field the person has never actually tried.

Postgraduate study, used well and used badly

A master's is an effective career-change lever in a narrow set of cases: when it is the recognised conversion route into a field, when it carries a placement or accreditation you cannot get otherwise, or when you are moving country and need a locally legible qualification.

It is used badly when it postpones a decision. The pattern is recognisable — someone finishes an undergraduate degree, has no clear next step, and enrols in something adjacent because it feels like motion. Two years later the decision is still outstanding and the debt is not.

The test is simple. Write down the job title you expect to hold afterwards and find five people currently in it. If most took that route, the degree is doing real work. If most did not, you are buying time, and there are cheaper ways to buy time.