Impacted Majors & the Common Data Set: A Parent’s Guide

College Admissions Strategy

Impacted Majors, the Common Data Set & What Every Parent Needs to Know

Most parents have never heard of the Common Data Set — and that gap in knowledge is costing students acceptances every year.

There is a document that every major college and university in the United States publishes each year. It contains detailed, standardized data on admissions, enrollment, financial aid, and academic programs. It is publicly available, free, and almost completely ignored by the families who need it most.

Nowhere is this gap more consequential than when it comes to impacted majors — a term that dramatically changes how selective a school really is. If your student plans to apply with a specific intended major, this is information you cannot afford to miss.

What Is the Common Data Set?

The Common Data Set (CDS) is a standardized form that colleges and universities fill out each year, covering:

Enrollment figures — total students, full-time vs. part-time, undergrad vs. grad
Admissions statistics — applicants, accepted students, enrolled students
Test score ranges (SAT/ACT 25th and 75th percentiles)
High school GPA distributions of admitted students
Financial aid data — average grants, loan volumes, percentage receiving aid
Graduation and retention rates

📌 How to find it: Search Google for “[College Name] Common Data Set [year]” — most schools publish it as a PDF on their institutional research or admissions pages. They are all public and free.

What Are Impacted Majors?

An impacted major is a program where demand from applicants significantly exceeds available spots. Admission to the college and admission to the major are two separate decisions — and the second can be considerably harder than the first.

40%+Of top-50 universities have at least one impacted major

2–3×More competitive than general admission at some schools

MostFamilies are never told this during campus visits

⚠️ Real scenario: A student applies to UC San Diego as a Computer Science major — 3.9 GPA, strong test scores. UCSD’s overall acceptance rate is ~24%. But CS at UCSD is impacted, with an acceptance rate closer to 8%. The student is rejected. The family is blindsided. This happens thousands of times per year.

How to Use the Common Data Set to Find Impacted Majors

Section C: First-time freshman profile by major. If a school breaks out admit data by program, acceptance rates will reveal which are most selective.
Section B: Enrollment by major. A program with very few enrolled students relative to school size may be intentionally capped.
Cross-reference the school’s website: Most schools with impacted majors disclose them somewhere — often buried in admissions FAQs or department pages.

💡 Pro tip from ACP: Compare the overall institutional acceptance rate in the CDS with what the school’s website says about specific majors. A school with a 30% overall rate may have a 9% rate for nursing. That’s a fundamentally different application — and students who don’t know this apply with the wrong strategy.

Why This Matters More Than the US News Rankings

Rankings measure institutional prestige in aggregate. They don’t tell you whether your student — applying as a specific person with specific goals to a specific program — has a realistic shot. The CDS does.

What is the actual GPA and test score range for admitted students in my student’s intended major?
Does this school practice need-blind admissions, or does financial need affect the decision?
What percentage of students receive grant aid vs. loans?
How does this school’s retention rate compare — are students satisfied enough to stay?
Is the average class size what the marketing materials suggest?

How ACP Uses This Data for Every Student We Work With

At Advanced College Planning, reviewing the Common Data Set is standard practice — not an afterthought. We look at each school through the lens of your student’s actual profile, their intended major, and the real admission data for that specific program.

Build a realistic college list: We identify schools where your student is genuinely competitive for their major — not just general admission
Craft a targeted strategy: If a student’s first-choice major is impacted, we advise on alternate entry paths, feeder majors, and transfer timelines
Set accurate expectations: Families make better decisions with real data. We believe in transparency over optimism — and the CDS gives us the tools to deliver that

Know the Data Before You Apply

ACP’s advisors review Common Data Sets, identify impacted majors, and build college lists that actually work — for your student’s profile and your family’s budget.

Talk to an ACP Advisor →