<p>Delayed graduation by calendar time could result from the following factors:</p>
<p>a. Taking time off (co-op job, gap semester/year, need to work to save money for school).
b. Part time enrollment, or below average credits per semester in “full time” enrollment.
c. Needing remedial course work.
d. Poor course planning (such as late change of major).
e. Failing and needing to repeat courses.
f. Difficulty in getting enrolled in needed courses because they are full.</p>
<p>Of the above factors, (a) does not result in increased school costs, so it should not really be a concern on that front (though some of the situations that cause the need for (a) may be of concern).</p>
<p>(b) may result in increased school costs (extra semester(s) of room and board unless commuting to a school local to where one would live anyway; tuition may depend on whether it is structured by semester or by credit). May be mitigated by bringing in AP or other credit upon entry.</p>
<p>(c), (d), and (e) are more about the student than the school. Students of marginal academic ability and motivation are at higher risk.</p>
<p>(f) is the one factor that is the school’s fault. One needs to check the school-specific forums to see whether that really is a problem. There do seem to be a lot of claims about this factor in an overgeneralizing manner, even though it tends to be rather school-specific (and often department-specific). Note, however, that some schools do offer a four year graduation pledge, where students not needing remedial courses who commit to follow their majors’ course plans get priority registration (this is offered at several CSUs where the overall four year graduation rate is under 20%, and at Minnesota where the overall four year graduation rate is 55%).</p>
<p>In general, you likely see higher four year graduation rates at more selective schools (where (c), (d), and (e) are less common, and the reasons for (a) and (b) are less common; many of the more selective schools are better endowed so that (f) is less common).</p>
<p>Four year graduation rates are likely to be higher at schools with more expensive list prices, due to the greater financial incentive to avoid taking an extra semester (especially if financial aid and scholarships end after eight semesters) compared to taking an extra semester at a cheaper in-state public university.</p>