Start by identifying the total cost of attendance (COA) at each school. This is the full published price: tuition, fees, room and board, books, transportation, and other estimated expenses. Then identify every item in the financial aid package and classify it as either gift aid (grants and scholarships — money you don't repay) or self-help aid (loans and work-study — money that involves repayment or earning).

Subtracting only the gift aid from the COA produces the net price. According to CollegeData, this calculation is more reliable than the number an award letter presents as a final cost. Some letters calculate net price after loans, which understates what you'll owe. Others exclude parts of the cost of attendance.

NASFAA's Aid Offer Comparison Worksheet provides a standardized template for doing exactly this comparison. It separates gift aid from self-help aid and calculates true out-of-pocket cost for each school. Federal Student Aid's website also provides an evaluation resource that walks through this process step by step.

Financial aid offers are for the current academic year only. They make no promises about what will be offered in future years. A school that offers a $20,000 scholarship freshman year may offer $15,000 in sophomore year if the scholarship has a GPA requirement you don't meet. A school offering a $10,000 grant based on demonstrated financial need may offer more or less in future years as your family's financial circumstances change and the school recalculates your SAI.

BigFuture's College Board resource explains that cost of attendance also changes year to year as tuition increases. Many colleges have increased tuition annually, and some impose higher year-over-year increases than the general inflation rate. Over the past 20 years, Tradition Wealth Management notes that the average price for tuition, fees, and room and board has increased 38% at public colleges and 29% at private colleges above the Consumer Price Index.

Building a four-year projection for each school — using the first-year net price as a baseline, adding a 3% to 5% annual increase for cost growth, and being conservative about scholarship renewal — gives you a better picture of the real four-year investment than the single-year comparison.

Once you have four-year net price estimates for each school, the next step is to calculate projected total debt at graduation: how much will need to be borrowed to fund each year's net price gap, assuming family contributions and any savings are applied first?

Federal student loans for undergraduates have annual limits: $5,500 as a freshman, $6,500 as a sophomore, and $7,500 as a junior and senior — totaling $27,000 over four years in direct student loans. Any amount beyond that cap has to come from Parent PLUS loans, private loans, or additional family resources. The Bright Horizons College Coach blog notes that average Parent PLUS loan debt for parents who borrow runs around $30,000 — meaning total family debt for one student at a high-cost school can approach $57,000 or more, and that's before considering interest.

Comparing projected total debt at each school, calculated the same way for both offers, is one of the most informative comparisons you can make. The school with the lower four-year total debt burden (combined student plus family borrowing) is usually the financially safer choice, all else being equal.

The same degree from two different schools doesn't always produce the same financial outcome, but major-level outcomes are more predictive than institutional ranking in most fields. Georgetown CEW research confirms that field of study explains more of the variation in earnings among graduates than institutional prestige does.

For most majors and career paths, a state university that graduates you with $25,000 in debt is a better financial deal than a private university that graduates you with the same major and $60,000 in debt. The credential and the skills are similar; the starting debt load is very different.

For specific fields — primarily finance, consulting, investment banking, and a few others — institutional prestige does affect hiring pipelines in ways that can make a higher-cost school worth a meaningful premium. If you're entering one of those fields, it's worth getting specific information about where the companies you want to work for actually recruit, because it will tell you whether the premium for a specific school is real.

Comparing two college offers fairly requires the same information, calculated the same way, for each school. Net price after gift aid only. Four-year cost projection, not just year one. Total debt at graduation for both student and family. Major-specific outcomes, not just institutional rankings. Run that comparison side by side and the choice almost always becomes clearer. And if it doesn't, the remaining question is usually about factors beyond the financial comparison — campus environment, academic program quality, personal fit — where the numbers can't decide for you.