<p>Marathonman: the average amount they reported was over $14,000; yes this is annually but you only do co-op for 6 mos in one year so this is also for the entire co-op period. However, it does depend greatly on your major, and also on your living costs - if you do your co-op in the Boston area and need to pay for housing etc (as opposed to doing it in your home town and living at home for free, for instance), that may greatly reduce how much you can “save” for the semesters you are in class.</p>