Earning college credit while still in high school can save you money, let you skip introductory courses, and show colleges you're ready for challenging work. The three most common ways American students do this are Advanced Placement (AP), International Baccalaureate (IB) and dual enrollment. Each works differently, and the credit you receive depends on the college you attend. This guide compares them so you can make smart choices.
Advanced Placement (AP)
AP courses are college-level classes offered at many high schools, designed by the College Board. Each course ends with an AP exam in May, scored on a scale of 1 to 5.
- Many colleges grant credit or placement for scores of 3 or higher; selective colleges may require a 4 or 5, and some limit or don't award credit for certain exams.
- There are dozens of AP subjects, from Calculus and Biology to Psychology and Art History.
- You can take an AP exam even if your school doesn't offer the course, by arranging to test at a school that does.
- Fee reductions are available for eligible students.
International Baccalaureate (IB)
The IB Diploma Programme is a two-year, internationally recognized curriculum for 11th and 12th graders, offered at participating schools. Students take courses across six subject groups, plus core requirements: the Theory of Knowledge course, an Extended Essay and Creativity, Activity, Service (CAS) projects.
- Exams are scored from 1 to 7.
- Courses are offered at Higher Level (HL) and Standard Level (SL). Colleges more often award credit for HL scores, typically 5 or above.
- Students can pursue the full IB Diploma or take individual IB courses.
- Some colleges award extra credit or sophomore standing for completing the full diploma.
Dual enrollment
Dual enrollment (also called concurrent enrollment or early college) lets high school students take actual college courses — often from a local community college — and earn both high school and college credit.
- Courses may be taught at your high school, on a college campus or online.
- Your grade appears on a college transcript, which is permanent. Strong grades help you; low grades follow you.
- Many states and districts offer dual enrollment at low or no cost.
- Credits usually transfer most easily to public colleges in the same state, especially under statewide transfer agreements.
Comparing the options
| AP | IB | Dual enrollment | |
|---|---|---|---|
| How credit is earned | Score on a single end-of-year exam | Exam scores (plus diploma requirements) | Passing the college course |
| Where accepted | Widely recognized across the U.S. | Widely recognized, including internationally | Varies; strongest in-state |
| Grade on transcript | High school grade only | High school grade only | College transcript grade |
| Best for | Students who test well | Students seeking a rigorous, integrated program | Students wanting a real college experience |
How colleges use these credits
Every college sets its own credit policy. A score or course might earn:
- Direct credit for a specific course (for example, AP Calculus AB credit for Calculus I).
- Elective credit that counts toward graduation but not a specific requirement.
- Placement only — you skip the intro class but earn no credit.
- Nothing, especially for certain majors or at highly selective schools.
Look up the AP, IB and transfer credit policies on each college's website or in its course catalog. The College Board also offers an AP credit policy search tool.
Should you skip intro courses?
Not always. If you're entering a major where an introductory course is a key foundation — such as calculus for engineering or chemistry for pre-med — consider whether you're truly ready to skip it. Some professional schools, including many medical schools, prefer to see certain prerequisites completed at a college rather than through AP credit. Talk to an advisor before you decide.
Admissions benefits
Beyond credit, these programs show colleges you've challenged yourself. Admissions officers evaluate your course rigor within the context of what your school offers. You don't need to take every advanced course available — choose ones that fit your interests and that you can do well in, while keeping balance in your life.
The bottom line
AP, IB and dual enrollment can save you time and money, but credit policies vary. Plan ahead, research your target colleges' policies, and focus on doing well in the courses you choose. For more on admissions, see the U.S. college application process.
