1.6 Format, Scoring, Results, Retakes, and Recertification

The Exam Frame and the Credential Cycle

The ISA Certified Arborist exam format is 200 multiple-choice questions. The form includes 20 new questions that are pretest questions and are not used in individual exam scores. They are not identified and are scattered throughout the exam, so candidates should answer every question seriously.

The time limit is 3.5 hours, which is 210 minutes. A practical pacing target is to move steadily enough to answer all 200 questions and still leave a small review buffer. Because the pretest questions are not labeled, do not try to guess which items count. Treat every item as if it matters.

The passing score in the current brief is 76%. ISA also notes that the overall passing score can change after a job task analysis. That means candidates should avoid old score shortcuts and use the current official materials when preparing, scheduling, or advising someone else.

Domain averages are not equal to the overall score. A candidate may see performance information by content area, but the exam is weighted by the official outline. The safest study approach is to raise weak areas while still respecting the larger domains, especially Safe Work Practices, Pruning, Tree Biology, and Tree Risk.

For computer-based testing, result notification is immediate. Formal results post to the ISA account within four weeks. The immediate notice helps with planning, but candidates should still wait for formal posting before treating administrative records as complete.

Retake planning should be factual. After a failed attempt, the brief says a candidate may retake after 30 days from the most recent attempt, with a $120 fee per retake. A no-show or missed exam retake re-enrollment is also listed at $120. These costs make scheduling discipline and readiness checks important.

Recertification starts the day the candidate becomes credentialed. The credential is valid for three years. To recertify, the arborist can pass the exam again or earn at least 30 continuing education units related to the 10 tested domains and pay the $220 recertification fee.

A useful post-exam habit is to build a CEU file right away. Save course certificates, event records, domain connections, and payment proof. Waiting until the end of the three-year period can turn maintenance into a scramble.

The main lesson is that the exam is only one part of the credential cycle. Eligibility gets you to authorization, the exam measures current arborist tasks, results move through immediate and formal steps, retake rules control second attempts, and recertification keeps the credential active.