For IAPMO Certifications: Candidates failing to achieve a passing score will be eligible for re-examination as soon as the next examination is scheduled. Re-examination will require the submittal of a new application and the payment of a new fee. There is no limit to the number of times you may take the examinations, however, after the 3rd attempt, the candidate will have to wait three months before applying again. It is recommended that you spend some time studying between attempts. For License Testing: How quickly a candidate can retake a license testing exams is typically dictated by the local licensing body. Candidates should contact their testing licensing body for their testing requirements and policies.