Nursing prerequisites are typically valid for 5 to 10 years, depending on the school and the type of course. Science courses like anatomy, physiology, and microbiology almost always have stricter expiration windows than general education courses like English or psychology, which often never expire at all. The most common cutoff for science prerequisites is 7 years, but this varies significantly from program to program.
Science Courses Have the Strictest Time Limits
The courses most likely to expire are your core sciences: anatomy, physiology, microbiology, and chemistry. Nursing programs enforce recency requirements on these courses because the content evolves and because a solid, current understanding of human biology is essential for clinical work. Most programs set the window at 5 to 7 years from the time you’d start the nursing program, not from when you apply.
Santa Ana College, for example, requires all three science prerequisites to have been completed within 7 years of the program start date. Marian University’s accelerated BSN program similarly requires science prerequisites completed within seven years of entering the program. Some competitive programs at research universities use a 5-year window instead, while a handful of community college ADN programs stretch it to 10 years. The 7-year mark is the most common standard you’ll encounter.
If your science courses fall outside that window, the grades don’t disappear from your transcript, but the program won’t count them toward admission. You’d need to retake them.
General Education Credits Usually Don’t Expire
Non-science prerequisites like English composition, introductory psychology, human development, sociology, statistics, and nutrition typically have no expiration date. These courses cover foundational knowledge that doesn’t change the way scientific understanding does, so programs are more flexible about when you completed them.
Marian University explicitly states that general education credits don’t expire. The University of Washington’s School of Nursing goes further, noting there is no expiration date for any prerequisite courses at all, though they acknowledge some students choose to retake courses to refresh the content. UW’s approach is the exception rather than the rule, especially for sciences, but it illustrates that policies genuinely differ from one school to the next.
Dona Ana Community College in New Mexico also places no time limit on prerequisite courses for its nursing program, though it does allow students to retake courses older than 7 years to improve their grades for a more competitive application. So even at schools without formal expiration policies, older coursework can put you at a disadvantage if your grades aren’t strong.
How Expiration Dates Are Actually Calculated
One detail that trips people up: the clock is measured backward from when you’d begin the nursing program, not from when you submit your application. If a program starts in Fall 2026 and requires sciences completed within 7 years, your courses need to have been taken no earlier than Fall 2019. Santa Ana College’s Fall 2026 cohort, for instance, accepts science courses completed no earlier than Spring 2020.
This matters because nursing programs often have waitlists or delayed start dates. A course that’s valid when you apply could technically age out by the time you’d actually begin. If you’re cutting it close on the 7-year window, check whether the school measures from the application deadline or the program start date.
What Happens When You Retake Expired Courses
If your sciences have expired, you’ll need to retake them before applying. How schools handle the grades from retakes varies. Some programs only look at the most recent grade. Others consider both attempts. A few use your first passing grade as the one that counts, which means retaking a course you already passed with a C might not help your GPA calculation unless the school has a specific policy allowing grade replacement for expired coursework.
At Santa Ana College, each prerequisite can be repeated once for a better grade within the 7-year recency window. Dona Ana Community College lets students retake courses older than 7 years specifically to replace a previous grade with an A or B, even though the program doesn’t formally require recency. These policies are designed to give returning students a path forward, but the specifics matter for your application strategy.
If you earned a science degree more than seven years ago, some accelerated BSN programs will still accept your credits as long as the degree itself was completed within the recency window. This can save you from retaking individual courses, though not every program offers this option.
How to Check Your Program’s Policy
There is no universal standard across nursing programs. ADN programs at community colleges, traditional BSN programs at universities, and accelerated BSN programs for second-degree students all set their own rules. Even programs in the same state can differ by several years.
The fastest way to get a definitive answer is to look for a “prerequisite worksheet” or “admission requirements” PDF on the nursing program’s website. These documents almost always specify recency requirements for each course. If the information isn’t listed, call the nursing admissions office directly. General university advisors sometimes give outdated or incorrect information about nursing-specific policies.
If you’re applying to multiple programs, track each school’s recency requirements separately. A physiology course from six years ago might be perfectly valid at one school and a year away from expiring at another. Planning around the strictest deadline gives you the most flexibility.