Pass/fail grading systems are pitched as a corrective to the stress and arbitrariness of letter grades. The marketing is compelling: reduce competition, encourage exploration, focus on learning over achievement. Several universities expanded pass/fail options dramatically during the pandemic, and many of those expansions stuck. The actual research on pass/fail grading, though, paints a less flattering picture than the rhetoric suggests. The systems consistently produce predictable distortions — and most of them favor the average student at the expense of the high-effort one.
Effort tracks the incentive structure
Multiple studies of pass/fail courses, particularly in medical and law schools, have found that student effort drops measurably when the grading switches from differentiated to binary. This isn’t a moral failing — it’s behavior responding rationally to incentives. If the only outcome measured is whether you cleared a low bar, the marginal hour of studying past that bar produces no recognized reward. Students who would have pushed for an A under letter grading aim for a comfortable pass instead. The data shows up in test scores, attendance patterns, and self-reported study time. The students who continue working hard under pass/fail are typically the ones internally motivated regardless of system; the ones who needed the external structure simply do less.
The signal to graduate schools and employers gets weaker
Letter grades are imperfect, but they convey information. Pass/fail transcripts convey almost none. When a graduate program receives an applicant’s transcript with twelve passes and no further differentiation, the admissions committee can’t distinguish between the student who excelled and the student who barely cleared the line. The information vacuum doesn’t make the assessment go away — it just shifts it to standardized tests, recommendation letters, and informal reputation, all of which have their own biases. Schools that adopted pass/fail grading partly to reduce inequity have sometimes found they increased it, because students from well-connected backgrounds are better positioned to benefit from the alternative signaling channels that fill the gap.
The strongest students lose the most
The students who would have earned A’s under traditional grading are the ones whose academic record is most degraded by pass/fail systems. Their excellence becomes invisible. Meanwhile, the students who would have earned C’s gain the most: their below-average performance is hidden inside the same “pass” as everyone else. Whether you think this is a good or bad outcome depends on your view of education’s purpose. If you think school should reward excellence and provide accurate signal to downstream institutions, pass/fail is a step backwards. If you think school should minimize hierarchical sorting at the cost of information loss, pass/fail does what it says. The honest framing, rather than the marketing one, is that pass/fail doesn’t eliminate competition — it just moves the sorting somewhere less visible and arguably less fair.
Bottom line
Letter grades are a flawed system worth criticizing. Replacing them with pass/fail isn’t a neutral fix — it’s a different system with its own predictable distortions, most of which compress the top of the distribution and reward median performance. Reforming grading deserves more careful design than the binary toggle most schools have reached for.
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