OCN Exam Cost and How to Register (2026)
Published 2026-10-30 · Facts and text checked 2026-10-16 · Reviewed by Hana N., Quality Reviewer
The OCN exam costs $420 for nonmembers and $300 for ONS or APHON members, according to ONCC. After a failed attempt you can apply again once your 90-day test window has expired, and ONCC DoubleTake, an extra $100 bought with the first application, covers a second attempt within 180 days.
| Fact | Value and source |
|---|---|
| Exam fee | $420 nonmembers / $300 ONS or APHON membersONCC: 2026 Test Registration Manual · checked 2026-10-12 |
| Retakes | After a failed attempt you can apply again once your current 90-day test window has expired; the same test cannot be taken more than once per 90-day window. After three failed attempts within three years you must wait one year. ONCC DoubleTake (an extra $100 bought with the first application) covers a second attempt applied for within 180 days.ONCC: Oncology Certified Nurse (OCN) · checked 2026-10-12 |
| Exam body | Oncology Nursing Certification Corporation (ONCC)ONCC: Oncology Certified Nurse (OCN) · checked 2026-10-12 |
You apply to ONCC, then schedule within your test window. Read the current ONCC Test Registration Manual before you pay: it has the eligibility rules, the window dates and the retake conditions.
If you fail three times within three years, you must wait one year before testing again. That is one more reason to check your readiness before you book.
Check yourself with the free "Am I ready?" quiz or start with the 25 free practice questions, then follow the 14-day study plan.
Want the full OCN preparation?
These questions come from our OCN study guide: full-length practice tests with every answer explained, flashcards, an AI study tutor and the audiobook.