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The Certified Arborist

Q:  What is the Arborist certification?

The Arborist certification exam gives arborists the necessary credentials to certify their knowledge and skills, as well as their dedication.

Q:  How much does it cost to take the Arborist exam?

The Arborist exam fee is $170 for ISA members and $280 for non-members.

Q:  How do you become a Certified Arborist?

To become a certified Arborist, you must successfully complete a certification exam, which requires you to have completed at least 3 years of experience. If you hold an associate’s degree, you only need two years of experience.

Q:  Is the Certified Arborist exam all multiple choice?


Q:  How long do you have to take the Certified Arborist test?

Test-takers will be given 3.5 hours to complete the exam.

Q:  How do you sign up for the Certified Arborist exam?

To sign up for the Certified Arborist exam, visit the ISA website.

Q:  What is a passing score for the Certified Arborist exam?

A score of at least 76% is considered passing for the Certified Arborist exam.

Q:  How many questions are on the Certified Arborist Exam?

There are 200 questions on the Certified Arborist exam.  The Exam covers these knowledge areas:

  • Soil Management – 12%

  • Identification and Selection – 8%

  • Installation and Establishment – 5%

  • Safe Work Practices – 15%

  • Tree Biology – 8%

  • Pruning – 16%

  • Diagnosis and Treatment – 12%

  • Urban Forestry – 7%

  • Tree Protection – 4%

  • Tree Risk Management – 13%


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