A postdoctorate (commonly called a “postdoc”) is a temporary research position taken after earning a doctoral degree. It typically lasts two to five years and serves as advanced training, giving recent PhD graduates the skills, publications, and professional network they need to compete for permanent positions in academia, industry, or government. The NIH formally defines it as “a temporary period of mentored research and/or scholarly training for the purpose of acquiring the professional skills needed to pursue a career path of his or her choosing.”
What a Postdoc Actually Does
Postdocs spend the vast majority of their time on research. Unlike faculty members, they rarely have administrative duties or required teaching loads, which frees them to focus almost entirely on producing original work. The core goal is publishing. Postdocs are expected to generate lead-author or single-author papers, and the quantity and quality of those publications become the primary currency when competing for the next career step. One researcher described publishing 12 or 13 papers during a three-year postdoc, including one in a top-tier journal.
Beyond benchwork or data analysis, postdocs also learn to write grant proposals, present findings at conferences, mentor junior lab members, and build collaborations with other researchers. Some postdocs get the chance to propose and fund their own independent research projects. The role is a hybrid: you’re contributing to your adviser’s research program while simultaneously building your own reputation and skill set.
How It Differs From a PhD
A PhD is a degree program with coursework, qualifying exams, and a dissertation. A postdoc is a job, not a degree. You won’t earn another credential at the end. The distinction matters because it shapes what’s expected of you. As a PhD student, you’re learning how to do research. As a postdoc, you’re expected to already know how and to demonstrate that you can do it independently, at a higher level, and with increasing leadership.
Postdocs also carry more professional responsibility. You’re expected to attend seminars, network at conferences, review manuscripts, and develop the “soft skills” of an independent scientist: clear writing, public speaking, teamwork, and mentoring. These are the competencies that hiring committees and employers evaluate when deciding whether you’re ready for an independent role.
How Long It Lasts
Most postdoc appointments run between one and five years. The exact length depends on the field, the funding source, and the individual’s career trajectory. In the life sciences, postdocs tend to be longer because the path to a tenure-track faculty position is more competitive, and multiple years of high-quality publications are typically expected. In engineering and the physical sciences, postdocs can be shorter since industry hiring is more accessible.
Some positions require that candidates have no more than zero to three years of prior postdoc experience, which reflects an expectation that this is a transitional stage, not a permanent one. Institutions and funding agencies generally discourage extended postdoc periods, though in practice many researchers end up doing more than one postdoc before landing a permanent position.
Salary and Benefits
Postdoc pay is modest relative to the level of education required. The NIH sets a widely used baseline through its National Research Service Award stipend levels. For fiscal year 2025, a postdoc with zero years of experience earns $62,232 per year. That figure rises incrementally with experience, reaching $75,564 for those with seven or more years of postdoctoral work. Many universities and research institutions peg their postdoc salaries to these NIH levels, though some pay above them.
Benefits vary depending on how your position is funded. Postdocs paid through a research grant are generally treated as university employees and receive full benefits: medical, dental, and vision coverage starting on day one, short- and long-term disability insurance, life insurance, and access to retirement savings plans. Postdocs supported by federal training awards (like NRSA fellowships) get most of the same health coverage but are not classified as employees under IRS rules, which means they lose access to pre-tax benefits like retirement accounts and dependent care spending accounts. This is a detail worth checking before you accept a position, because two postdocs at the same university can have meaningfully different benefit packages depending on their funding source.
Fellowships vs. Grant-Funded Positions
There are two main ways a postdoc gets paid. In a grant-funded position, your salary comes from your adviser’s research grant, and your work is closely tied to that grant’s objectives. You have less autonomy, but the position is usually easier to find because advisers with active grants are always looking for researchers.
A fellowship, by contrast, is funding you apply for and win on your own. Organizations like the National Science Foundation offer postdoctoral fellowships specifically designed to support independent research. These are more competitive but come with significant advantages: you choose your own research direction, you gain experience writing successful grant applications, and having “fellow” on your CV signals to future employers that your work was evaluated and funded on its own merits. Most NSF funding opportunities also allow principal investigators to include postdocs in their project budgets, so the line between these categories isn’t always sharp.
Where Postdocs End Up
The career outcomes data may surprise you. A tenure-track faculty position is often framed as the “goal” of a postdoc, but only a minority of postdocs actually land one. In the life sciences, roughly 23% of postdocs obtained tenure-track employment within five to six years. In the physical sciences and engineering, the figure was higher but still only about one-third.
The rest move into a range of careers. Among life science postdocs who trained in academic labs, about 35% moved to industry, 32% took other permanent academic roles (non-tenure-track research or teaching positions), and 8% went to government. For those who did their postdoc in a government lab, the split looked different: 42% stayed in government, 33% went to industry, and only about 10% ended up on the tenure track.
These numbers aren’t discouraging if you go in with realistic expectations. A postdoc builds transferable skills, including project management, data analysis, scientific communication, and the ability to design and execute complex research. Those skills are valued well beyond academia. The key is to treat the postdoc as professional development for whatever career you want, not just as a holding pattern while waiting for a faculty opening.
Visa Considerations for International Postdocs
International researchers in the U.S. typically hold one of two visa types. The J-1 exchange visitor visa is the most common for postdocs. It allows up to five years for research scholars, doesn’t require the holder to be on the university payroll, and accommodates a range of funding arrangements. The trade-off is that some J-1 holders face a two-year home residence requirement afterward, which limits their ability to switch to other visa types or apply for permanent residency without first returning to their home country.
The H-1B temporary worker visa is the other option. It requires full-time employment on the university payroll and has a six-year maximum, but it offers a major advantage: “dual intent,” meaning you can simultaneously hold the visa and apply for a green card. If you did a previous J-1 with a two-year home requirement that you haven’t fulfilled, you generally can’t switch to H-1B status. These rules interact in complicated ways, so international postdocs typically work closely with their institution’s international services office well before their start date.