Degree Types at a Glance: Associate, Bachelor's, Master's, and Doctoral

The Four Main Degree Levels, Explained

The U.S. higher education system organizes degrees into four broad levels, each built on the one before it. Understanding what each requires — in time, credit hours, and prerequisites — helps families plan a realistic path rather than reacting to options as they appear.

For a plain-English explanation of related college planning terms, see Higher Education Terminology Every Family Should Know.

Associate Degree

An associate degree typically takes two years of full-time study and requires roughly 60 credit hours. It is most commonly offered at community colleges, technical colleges, and some four-year institutions.

There are two primary types: the Associate of Arts (A.A.) or Associate of Science (A.S.), which are designed to transfer into a bachelor's program, and the Associate of Applied Science (A.A.S.), which is career-focused and may not transfer as cleanly. Fields like nursing, dental hygiene, and paralegal work regularly hire graduates at the associate level.

For families weighing cost and time, Community College vs. Four-Year University lays out what the two-year path actually costs compared to starting at a four-year school.

Bachelor's Degree

A bachelor's degree requires approximately 120 credit hours — typically four years of full-time study, though part-time students may take longer. It is the standard entry credential for most professional careers in the United States and the baseline for graduate study.

The two most common awards are the Bachelor of Arts (B.A.), which emphasizes humanities and social sciences, and the Bachelor of Science (B.S.), which leans toward technical and quantitative disciplines. Some fields, such as nursing, education, and engineering, award specialized bachelor's titles (B.S.N., B.Ed., B.S.E.).

Students who earn an associate degree at a community college can often transfer credits toward a bachelor's through articulation agreements — formal transfer pathways negotiated between institutions.

Master's Degree

A master's degree is a graduate credential built on top of a completed bachelor's degree. Most programs run one to two years full-time and require 30–60 additional credit hours, often including a thesis, capstone project, or comprehensive examination.

Common master's degrees include the Master of Arts (M.A.), Master of Science (M.S.), Master of Business Administration (M.B.A.), and professional titles such as the Master of Social Work (M.S.W.) or Master of Education (M.Ed.). Some fields — clinical psychology, library science, architecture — require a master's as the standard professional entry point.

Master's programs are widely available online. Before enrolling in any remote program, review Online Degrees in 2024: Academic Standing, Employer Perception, and Practical Limits to understand how credential quality varies.

Doctoral Degree

A doctoral degree is the highest academic credential awarded in the U.S. system. The two main categories are the research doctorate — most commonly the Ph.D. (Doctor of Philosophy) — and professional doctorates such as the M.D. (medicine), J.D. (law), Ed.D. (education leadership), or Psy.D. (clinical psychology).

Ph.D. programs typically take four to seven years beyond the bachelor's degree, including coursework, qualifying exams, and an original dissertation. Professional doctorates vary: M.D. and J.D. programs are generally three to four years of intensive post-bachelor's study, while Ed.D. programs often run three years and are designed for working professionals.

Not all career goals require a doctorate. See Certificates, Certifications, and Degrees: What Each One Actually Signals to Employers for guidance on matching your credential to your actual career target.