The Costs That Scale With Time, Not Credits

Per-credit tuition is roughly path-independent: 120 credits costs the same whether you take them over four years or ten. Everything billed per term is not. Mandatory fees, health insurance, technology charges, and living costs recur every term you stay enrolled, so a part-time student stretching a degree across eight years pays those line items twice as many times for the identical credential. This is the single most underestimated factor in the comparison, and it is why stretching enrollment rarely saves as much as the lower per-term bill suggests.

How Enrollment Intensity Changes Your Aid

Federal Pell Grants are prorated by enrollment intensity — full-time draws the full award, half-time draws roughly half — and federal loans require at least half-time enrollment. More consequentially, many state grants and institutional scholarships require full-time status outright and disappear entirely below 12 credits. Because aid is awarded per term rather than per credit, a part-time student can end up receiving less total aid across a longer enrollment than a full-time student receives across a shorter one. Verify each award's enrollment requirement before assuming it survives a switch to part-time.

Forgone Earnings Usually Decide It

The largest term in this comparison is often the wages you do not earn. A student working 12 hours a week at $22 an hour clears about $4,000 a term; at 30 hours the same wage yields roughly $10,000. Over the length of a degree that gap can approach $50,000, which frequently exceeds the entire tuition difference. This is what makes part-time enrollment genuinely attractive for students with solid wages or employer tuition assistance, and it is also why the calculation is so sensitive to the wage you enter.

The Risk the Arithmetic Does Not Capture

Completion probability belongs in the decision even though no formula prices it cleanly. Students working more than about 20 hours a week while enrolled complete at measurably lower rates, and an unfinished degree is the worst financial outcome available — full cost, no credential. The other omission runs the opposite way: finishing sooner starts your post-degree salary sooner, and that raise typically dwarfs student-job wages. Treat this tool as a way to size the cost gap, then weigh it against how likely each path is to get you to graduation and how much your degree changes your earnings.