The official definition
The graduation rate published by the Department of Education tracks a specific cohort: students who were enrolled for the first time, full-time, and seeking a degree or certificate, in a particular autumn term. It then reports what share of that group completed a credential within 150% of the normal time.
| Programme length | Normal time | 150% of normal time |
|---|---|---|
| Associate’s degree | 2 years | 3 years |
| Bachelor’s degree | 4 years | 6 years |
A separate figure tracks completion within 200% of normal time — four years for an associate’s degree, eight for a bachelor’s. The two together show how much of the completion happens late.
Who is excluded
- Part-time students, who are a large share of enrolment at many community colleges and some four-year institutions.
- Students who transfer in from another college, because they are not first-time students.
- Students who return after a break, who count as neither first-time nor continuous.
- Students who transfer out. A student who leaves to finish elsewhere counts as a non-completion for the original college, even though they completed a degree.
How to read it anyway
The rate is still useful, as long as you know what it is measuring. Ask three questions: how many students were in the cohort, what share of the institution’s enrolment that represents, and whether the college mostly serves the kind of student the measure tracks.
- A large cohort with a moderate rate is more informative than a tiny cohort with a high rate.
- If the cohort is a small fraction of enrolment, the rate describes a minority of students.
- Compare the 150% and 200% figures. A big gap means many students take longer than the standard time — which is normal, and not a failure.
- Combine it with the retention rate, which measures whether first-year students come back at all.