phd degree years

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How Long Does It Take to Get a Ph.D. Degree?

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Earning a Ph.D. from a U.S. grad school typically requires nearly six years, federal statistics show.

(CAIAIMAGE/TOM MERTON/GETTY IMAGES)

A Ph.D. is most appropriate for someone who is a “lifelong learner.” 

Students who have excelled within a specific academic discipline and who have a strong interest in that field may choose to pursue a Ph.D. degree. However, Ph.D. degree-holders urge prospective students to think carefully about whether they truly want or need a doctoral degree, since Ph.D. programs last for multiple years.

According to the Survey of Earned Doctorates, a census of recent research doctorate recipients who earned their degree from U.S. institutions, the median amount of time it took individuals who received their doctorates in 2017 to complete their program was 5.8 years. However, there are many types of programs that typically take longer than six years to complete, such as humanities and arts doctorates, where the median time for individuals to earn their degree was 7.1 years, according to the survey.

Some Ph.D. candidates begin doctoral programs after they have already obtained master’s degrees, which means the time spent in grad school is a combination of the time spent pursuing a master’s and the years invested in a doctorate. In order to receive a Ph.D. degree, a student must produce and successfully defend an original academic dissertation, which must be approved by a dissertation committtee. Writing and defending a dissertation is so difficult that many Ph.D. students drop out of their Ph.D. programs having done most of the work necessary for degree without completing the dissertation component. These Ph.D. program dropouts often use the phrase “ all but dissertation ” or the abbreviation “ABD” on their resumes.

According to a comprehensive study of  Ph.D. completion rates  published by The Council of Graduate Schools in 2008, only 56.6% of people who begin Ph.D. programs earn Ph.D. degrees.

Ian Curtis, a founding partner with H&C Education, an educational and admissions consulting firm, who is pursuing a Ph.D. degree in French at Yale University , says there are several steps involved in the process of obtaining a Ph.D. Students typically need to fulfill course requirements and pass comprehensive exams, Curtis warns. “Once these obligations have been completed, how long it takes you to write your dissertation depends on who you are, how you work, what field you’re in and what other responsibilities you have in life,” he wrote in an email. Though some Ph.D. students can write a dissertation in a single year, that is rare, and the dissertation writing process may last for several years, Curtis says.

[ READ: What Is a Doctorate or a Doctoral Degree?  ]

Curtis adds that the level of support a Ph.D. student receives from an academic advisor or faculty mentor can be a key factor in determining the length of time it takes to complete a Ph.D. program. “Before you decide to enroll at a specific program, you’ll want to meet your future advisor,” Curtis advises. “Also, reach out to his or her current and former students to get a sense of what he or she is like to work with.”

Curtis also notes that if there is a gap between the amount of time it takes to complete a Ph.D. and the amount of time a student’s funding lasts, this can slow down the Ph.D. completion process. “Keep in mind that if you run out of funding at some point during your doctorate, you will need to find paid work, and this will leave you even less time to focus on writing your dissertation,” he says. “If one of the programs you’re looking at has a record of significantly longer – or shorter – times to competition, this is good information to take into consideration.”

Pierre Huguet, the CEO and co-founder of H&C Education, says prospective Ph.D. students should be aware that a Ph.D. is designed to prepare a person for a career as a scholar. “Most of the jobs available to Ph.D. students upon graduation are academic in nature and directly related to their fields of study: professor, researcher, etc.,” Huguet wrote in an email. “The truth is that more specialization can mean fewer job opportunities. Before starting a Ph.D., students should be sure that they want to pursue a career in academia, or in research. If not, they should make time during the Ph.D. to show recruiters that they’ve traveled beyond their labs and libraries to gain some professional hands-on experience.”

Jack Appleman, a business writing instructor, published author and Ph.D. candidate focusing on organizational communication with the  University at Albany—SUNY , says Ph.D. programs require a level of commitment and focus that goes beyond what is necessary for a typical corporate job. A program with flexible course requirements that allow a student to customize his or her curriculum based on academic interests and personal obligations is ideal, he says.

[ READ: Ph.D. Programs Get a Lot More Practical.  ]

Joan Kee, a professor at the University of Michigan  with the university’s history of art department, says that the length of time required for a Ph.D. varies widely depending on what subject the Ph.D. focuses on. “Ph.D. program length is very discipline and even field-specific; for example, you can and are expected to finish a Ph.D, in economics in under five years, but that would be impossible in art history (or most of the humanities),” she wrote in an email.

Jean Marie Carey, who earned her Ph.D. degree in art history and German from the  University of Otago  in New Zealand, encourages prospective Ph.D. students to check whether their potential Ph.D. program has published a timeline of how long it takes a Ph.D. student to complete their program. She says it is also prudent to speak with Ph.D. graduates of the school and ask about their experience.

Bennett urges prospective Ph.D. students to visit the campuses of their target graduate programs since a Ph.D. program takes so much time that it is important to find a school that feels comfortable. She adds that aspiring Ph.D. students who prefer a collaborative learning environment should be wary of graduate programs that have a cut-throat and competitive atmosphere, since such students may not thrive in that type of setting.

[ READ: 4 Fields Where Doctorates Lead to Jobs.  ]

Alumni of Ph.D. programs note that the process of obtaining a Ph.D. is arduous, regardless of the type of Ph.D. program. “A Ph.D. is a long commitment of your time, energy and financial resources, so it’ll be easier on you if you are passionate about research,” says Grace Lee, who has a Ph.D. in neuroscience and is the founder and CEO of Mastery Insights, an education and career coaching company, and the host of the Career Revisionist podcast.

“A Ph.D. isn’t about rehashing years of knowledge that is already out there, but rather it is about your ability to generate new knowledge. Your intellectual masterpiece (which is your dissertation) takes a lot of time, intellectual creativity and innovation to put together, so you have to be truly passionate about that,” Lee says.

Erin Skelly, a graduate admissions counselor at the IvyWise admissions consulting firm, says when a Ph.D. students struggles to complete his or her Ph.D. degree, it may have more to do with the student’s academic interests or personal circumstances than his or her program.

“The time to complete a Ph.D. can depend on a number of variables, but the specific discipline or school would only account for a year or two’s difference,” she wrote in an email. “When a student takes significantly longer to complete a Ph.D. (degree), it’s usually related to the student’s coursework and research – they need to take additional coursework to complete their comprehensive exams; they change the focus of their program or dissertation, requiring extra coursework or research; or their research doesn’t yield the results they hoped for, and they need to generate a new theory and conduct more research.”

Skelly warns that the average completion time of a Ph.D. program may be misleading in some cases, if the average is skewed based on one or two outliers. She suggests that instead of focusing on the duration of a particular Ph.D. program, prospective students should investigate the program’s attritition and graduation rates.

“It is worthwhile to look at the program requirements and the school’s proposed timeline for completion, and meet current students to get their input on how realistic these expectations for completion are,” Skelly says. “That can give you an honest idea of how long it will really take to complete the program.”

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What Is a PhD?

A PhD is often the highest possible academic degree you can get in a subject. Learn more about whether earning a PhD could benefit your career.

A Doctor of Philosophy, often known as a PhD, is a terminal degree —or the highest possible academic degree you can earn in a subject. While PhD programs (or doctorate programs) are often structured to take between four and five years , some graduate students may take longer as they balance the responsibilities of coursework, original research, and other degree requirements with raising families or working full time. 

With a PhD, you may find opportunities to work as a university professor, a researcher in a commercial or government laboratory, a consultant, or a subject matter expert (SME). If you have the intellectual curiosity and dedication, earning a PhD can be a rewarding experience. In this article, we’ll go over what it takes to earn a PhD, the requirements to apply for a PhD program, and other factors worth considering.

Learn more: What Does ‘PhD’ Stand For?

PhD: Key facts

Generally, students begin their PhD after earning a bachelor’s degree and a master’s degree . However, some doctoral programs may offer you the chance to earn your master’s while pursuing your PhD, so that may not be an admissions requirement.  

What can you get a PhD in?

It’s possible to earn your PhD in a number of academic disciplines, including the natural sciences , humanities , arts, and social sciences . The 2021 Survey of Earned Doctorates, from the National Center for Science and Engineering Statistics, offers a numerical breakdown of actual degrees earned in broad academic fields [ 1 ]:

Engineering: 10,240

Biological and biomedical sciences: 8,149

Social sciences: 4,878

Physical sciences: 4,693

Psychology: 3,797

Computer and information sciences: 2,361

Health sciences: 2,331

Mathematics and statistics: 2,012

Agricultural sciences and natural resources: 1,334

Geosciences, atmospheric sciences, and ocean sciences: 1,064

Education: 4,252

Humanities and arts: 4,137

Business: 1,392

Other fields: 1,610

Depending on the university you attend, you may find that the broad academic fields above break down into more specific disciplines. For example, within a physical science department, you might get a PhD in physics or chemistry. Within an engineering department, you might get a PhD in electrical or mechanical engineering. Philosophy, theology, history, or English might fall within a humanities department, while economics or social work could fall within a social sciences department. Marketing could be a specific PhD major within a business department.

In terms of your PhD coursework and research, you will likely be expected to concentrate in some area of your larger subject. For example, PhDs in biology may focus on biochemistry or biostatistics, whereas a PhD in English may concentrate on twentieth-century American literature. 

Requirements to get a PhD

PhD programs typically require at least two years of advanced coursework, as well as comprehensive exams, and the successful completion of a dissertation. Let’s break that down on a year-by-year basis: 

Years 1 and 2: Take classes to develop advanced knowledge in your subject area. 

Year 3: Study for and successfully pass your comprehensive exams. 

Years 4 and 5: Research, write, and defend your dissertation. 

Once you have successfully passed your comprehensive exams, you’re typically considered “All But Dissertation” or ABD, which signals that you’ve finished everything in your doctoral program except your dissertation. 

Research supervisor 

PhD students often choose a faculty member who specializes in their area of interest to serve as the research supervisor. It can help to identify professors or programs that will support your research endeavors before applying, so you can establish a relationship with your potential research advisor early. 

The average cost of a PhD program in the US is $106,860, though that figure can differ based on the type of institution you attend and what you study [ 2 ].

Reasons to get a PhD

Earning your PhD can be an immensely rewarding experience, but the degree can be a big commitment, requiring significant time, money, and work. 

Here are some more reasons you may want to pursue a PhD:

Become a subject matter expert in a particular field.

Conduct the research you are passionate about.

Develop transferable skills that can help in your professional life. 

Make a difference in the world with new research.

Make connections with scholars in your academic community.

Open up career avenues in academic and research work.

Completing a PhD can reveal to employers that you possess a wide range of competencies that are valued in both academic and non-academic settings. 

PhD salaries

PhD holders earn a median weekly income of $1,909 compared to master’s degree holders, who earn a median weekly income of $1,574, according to the US Bureau of Labor Statistics (BLS) [ 3 ]. They may also experience lower percentages of unemployment. The unemployment rate for PhD graduates is 1.5 percent compared to master’s degree holders at 2.6 percent [ 3 ].

Requirements to apply to a PhD program

PhD programs expect you to meet several requirements before enrolling. Here are some examples of common requirements:

Have an undergraduate degree, usually with at least a 3.0 overall GPA.

Have a master's degree, though some programs may not require it.

Take the Graduate Record Examination (GRE) and achieve a minimum score.

Submit a sample of your academic writing.

Submit your CV .

Provide letters of recommendation , which should ideally come from academic faculty members who can speak to your research or intellectual abilities.

Requirements differ by program and school, so take time to become familiar with the entry requirements of universities where you’re interested in applying. Admissions staff or departmental staff should be able to give you specific information about their admissions requirements.

If a program is interested in you, based on your application, you may have to complete an interview. The university representatives that interview you will look at your motivation, how prepared you are, and how suitable you are for acceptance into the doctoral degree program.

PhD vs. other terminal degrees

Terminal degrees are the highest degree available in a field of study. While the PhD is the highest academic degree you can earn in a field of study, a Juris Doctor (JD) is the highest degree you can earn in law, and a professional degree , such as a Doctor of Medicine (MD) or a Doctor of Veterinary Medicine (DVM) , is the highest degree you can earn in these medical professions. 

Learn more: What is a Terminal Degree and Do You Need One?   

Professional doctorates are a different category of doctorate degree. They are usually intended for professionals already working in a field who want to pursue advanced training in their area. The main difference between a professional doctorate and an academic doctorate has to do with subject matter and research. While PhDs are interested in conducting new research, professional degree students take existing models and knowledge and apply them to solve problems. Professional doctorates are also designed to prepare learners for careers in a certain industry rather than academia.  

Examples of professional doctorates include:

DBA (Doctor of Business Administration)

DNP (Doctor of Nursing Practice)

EdD (Doctor of Education)

DPH (Doctor of Public Health)

Is someone with a PhD a doctor?

You can use the salutation "Dr" to address people who hold doctorates, including PhDs and other professional degrees. The word "doctor" comes from the Latin word for "teacher," and PhDs are often professors at universities. While it has become more common to refer to medical doctors as “Dr,” some professors use the honorific when addressing students and in professional settings.

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Article sources

NCSES. " 2021 Survey of Earned Doctorates , https://ncses.nsf.gov/pubs/nsf23300/report/field-of-doctorate." Accessed August 1, 2023.

Education Data Initiative. “Average Cost of a Doctorate Degree ,     https://educationdata.org/average-cost-of-a-doctorate-degree.” Accessed August 1, 2023.

US Bureau of Labor Statistics. “Earnings and Unemployment rates by educational attainment, 2021 , https://www.bls.gov/emp/chart-unemployment-earnings-education.htm." Accessed August 1, 2023.

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This content has been made available for informational purposes only. Learners are advised to conduct additional research to ensure that courses and other credentials pursued meet their personal, professional, and financial goals.