Ask what a bachelor’s degree costs and you’ll get three different numbers, each true in a different way — and the one most people quote is the least useful. The sticker price is the figure on the brochure. The net price is what families actually pay. And the full cost is the one that decides whether the degree pays off, because it includes the four years of wages you don’t earn while studying. This page works through all three, and then the part that matters most: how wildly the return on that cost varies by field. Once you have your own numbers, the calculator puts them against a trade path.

Sticker price: the number almost no one pays

The published, advertised price of a degree is the easiest to find and the most misleading. For 2025-26, average sticker tuition and fees run about $11,950 a year at a public four-year in-state school and about $45,000 at a private nonprofit (College Board). Add room, board, books, and living costs and the published total cost of attendance reaches roughly $29,910 a year in-state public — north of $60,000 a year at many private colleges.

But sticker price functions more like a hotel’s rack rate than a real price. Most undergraduates don’t pay it. Colleges set a high published number and then discount it heavily through grants and institutional aid, so the figure on the brochure is the starting point of a negotiation, not the bill.

Net price: what families actually pay

Net price is the sticker minus grant aid that never has to be repaid. The gap is large. At private colleges, an average sticker around $62,570 a year can fall to a net price near $30,000 once grant aid is applied — less than half. Net prices have been roughly flat or falling in real dollars at many institution types in recent years, because grant aid has grown faster than sticker prices.

Two cautions keep net price honest. It’s an average — your own net price depends on your family’s finances, and every college is required to publish a net price calculator that estimates yours specifically. And net price subtracts grants but not loans: borrowed money lowers what you pay today and raises what you owe later, so a low net price funded by debt isn’t as low as it looks.

The full cost: add the years you don’t earn

Here’s the number that decides the degree, and it’s missing from both sticker and net price: the wages you forgo while studying. For four years, a college student earns little or nothing while someone who went straight to work earns a median of about $49,200 a year (BLS, a high-school graduate with no college). Four years of that is roughly $197,000 in income not earned — and it dwarfs tuition.

Put it together and the full cost of a four-year degree, even at an affordable in-state public school, is the net price you pay plus close to $200,000 in forgone earnings. That’s the real investment. Sticker price hides it by overstating what you pay; net price hides it by ignoring what you don’t earn. Only the full cost tells you what the degree actually has to return to be worth it.

The return varies more than the cost does

The all-in cost of a bachelor’s degree doesn’t change much from field to field — tuition is roughly the same whether you study engineering or education. What changes enormously is the return, and that’s the whole decision.

In 2024, the average full-time worker whose highest degree is a bachelor’s earned about $105,000 (U.S. Census). But that average hides an enormous spread by major. Census data put metallurgical-engineering graduates at the top, averaging about $165,000, while library-science graduates averaged about $56,000 and early-childhood-education graduates about $60,000 — a gap of more than $100,000 a year between fields, for degrees that cost about the same to earn. Georgetown’s analysis finds a similar pattern across broad clusters: prime-age workers in STEM fields earn around $98,000 at the median against around $58,000 in education and public-service fields.

The same near-identical cost, in other words, buys a wildly different income depending on the field. A degree that returns $160,000 a year clears its full cost — including the forgone wages — quickly. A degree that returns $56,000 a year, against the same roughly $200,000 in forgone earnings plus tuition, may take most of a career to come out ahead, and against a skilled trade might never clearly do so. That’s not an argument against any field; plenty of lower-earning fields are worth choosing for reasons that aren’t financial. It’s an argument for knowing the actual number before you sign for it.

Putting your real numbers together

The honest cost of a degree is your net price (run the college’s net-price calculator, and count loans as the future cost they are) plus roughly $197,000 in forgone wages over four years — and the honest question is what your field is likely to return against that. A high-earning field clears it fast; a typical-earning one is closer to a wash over a full career; a lower-earning one depends heavily on factors the arithmetic can’t price.

None of this is a verdict on whether to go, or what to study — that turns on far more than money. But the money is knowable, and most people never compute it. Take your real net price and your field’s likely wage and run them in the calculator against a trade path, or read the full-cost cornerstone for why the field, more than the price tag, decides whether a degree pays.