WashU's ED Rate Is 2.6x the Non-ED Rate

Washington University in St. Louis's published acceptance rate for the Class of 2029 (Fall 2025 entering class) is 11.92%, straight from WashU's own admissions class profile. That figure is accurate as a headline, but it's a full cycle newer than the most recent entering class with a published Common Data Set, which is the Class of 2028 (Fall 2024). For that cohort, applicants who applied Early Decision were admitted at 25.27%. Applicants who applied outside that binding round were admitted at 9.79%. More than 2.5 times the odds, from the same filing, for the same entering class.

The Decomposition

Show the math: WashU's Common Data Set 2024-2025 (Section C1) reports 32,754 total applicants and 3,951 total admits for the Class of 2028. Section C21 separately reports 4,817 Early Decision applications and 1,217 ED admits, an ED rate of 1,217 divided by 4,817, or 25.27%. Subtracting the ED figures from the overall totals isolates everyone outside the binding round: 32,754 minus 4,817 is 27,937 applications, and 3,951 minus 1,217 is 2,734 admits. 2,734 divided by 27,937 is 9.79%. WashU's CDS reports a single combined Early Decision figure rather than splitting ED I and ED II separately, so this decomposition treats WashU's binding early round as one pool.

A Gap That Has Held Steady

One year earlier, for the Class of 2027 (Fall 2023 entering class), WashU's Common Data Set shows 32,240 total applicants and 3,855 admits, an overall rate of 11.96%. Of those, 4,517 applied Early Decision and 1,158 were admitted, an ED rate of 1,158 divided by 4,517, or 25.64%.

Across both years the ED rate has stayed in a tight band, 25.64% for Fall 2023 and 25.27% for Fall 2024, both roughly 2.5 to 2.6 times whatever the concurrent non-ED rate was. The applicant pool grew slightly year over year, from 32,240 to 32,754 total applicants, while the overall admit rate held essentially flat around 12%. This isn't a case where a shrinking or volatile pool is driving a headline number around; the gap between ED and non-ED odds has simply been a stable feature of how WashU fills its class across the two most recently published cycles.

Why the Gap Is This Big

Early Decision at WashU is binding. An admitted ED applicant has agreed in advance to enroll and to withdraw every other application. That commitment removes yield uncertainty, the central variable every admissions office has to manage when shaping an incoming class. A Regular Decision admit's enrollment is still a probability, since RD admits are typically comparing offers from multiple schools before deciding. That uncertainty forces RD admission rates down, because a college has to admit conservatively enough to hit its target class size even accounting for RD admits who choose to enroll elsewhere. This is a structural fact about how binding admission plans work everywhere they exist, not a claim that ED applicants to WashU are stronger than RD applicants.

The RD pool is also a different population from the ED pool almost by definition. Committing ED means naming WashU a first choice before you've seen a financial aid offer. Plenty of applicants who would have been competitive ED admits choose to apply Regular Decision instead, because they want to compare aid packages, because a fall semester's grades were still coming together, or because WashU wasn't their clear first choice until later. A 9.79% non-ED rate reflects a much larger, later-stage applicant pool competing for whatever seats the ED round hasn't already filled. It says nothing about how strong those applicants are relative to the ED pool.

What This Means for Your Application

The 25.27% ED figure isn't a rate you can borrow for an identical Regular Decision application. The ED and RD pools are different populations, so the roughly 2.6x gap between them overstates what switching rounds alone would do for one specific applicant with one specific file. It reflects the odds each pool actually faced, not the odds available to a single student choosing between rounds. Our breakdown of real acceptance rates shows this same pattern across other schools if you want a fuller comparison.

ED is also a financial commitment as much as an admissions one. Agreeing to WashU's binding plan means committing to enroll before you've seen its financial aid offer and before you can compare it against any other school's package. If comparing aid matters to your family, that comparison has to happen before you apply ED, not after, because a signed acceptance removes your ability to negotiate or shop the offer once it's in.

WashU's Common Data Set does not publish an admissions breakdown by school or major; while its admissions class-profile page reports how enrolled students are distributed across schools like Arts & Sciences, Engineering, and Olin Business, that's a snapshot of who enrolled, not an admit-rate calculation, so no per-school figure is included here. Our college list builder can help you see how WashU compares to your other targets, and our application deadline tracker can help you line up its ED and Regular Decision dates against the rest of your list.

If WashU is a genuine first choice and financing isn't the deciding factor, the ED numbers reflect a real structural advantage. Talk to a Dewey Smart advisor if you're still weighing whether that commitment fits your family's situation.

The Waitlist

WashU's Common Data Set leaves the field for "number of qualified applicants offered a place on the waiting list" blank in both its 2024-2025 and 2023-2024 filings, while still reporting the number who accepted a spot and the number ultimately admitted. This appears to be a consistent choice on WashU's part rather than a one-off gap, so the "offered" figure isn't available for either recent cohort.

For the Class of 2028 (Fall 2024 entering class), WashU's CDS reports 2,658 students accepted a place on the waitlist, and 210 were ultimately admitted off it, a conversion rate of about 7.9% among students who accepted a spot.