RBT Exam PrepThe short answer: the BACB sets no limit on reassessment attempts and no waiting period for the Initial Competency Assessment. If you do not demonstrate competence on a task, your assessor may provide corrective feedback and assess that task with you on another day, repeating until you demonstrate competence. You do not redo the 40-hour training. The only hard deadline is the 90-day window: the assessment must be completed no more than 90 days before you submit your RBT certification application.
1 How the assessment actually works
The RBT Initial Competency Assessment is the hands-on half of RBT eligibility. After you complete the required 40-hour training, you demonstrate that you can competently perform the tasks on the assessment packet, currently the version effective January 1, 2026. Two timing rules matter:
- After the training. The assessment must be completed after the 40-hour training is complete, never before.
- Within 90 days of applying. It cannot be completed more than 90 days before you submit your RBT certification application. The completed assessment is uploaded with the application.
The assessment may be conducted over one or more sessions, and it may be done in person, live via the internet, or through observations of recorded videos created specifically for the purpose of the assessment. That flexibility is part of why a miss is so fixable: you redo one task, not one testing-center appointment.
2 What the assessor grades, task by task
The assessor gives you an opportunity to perform each task and evaluates whether it was performed in a competent manner. There are no points and no percentage. Each task is a binary judgment: demonstrated or not demonstrated. The packet, effective January 1, 2026, organizes tasks into five areas:
| Area | What it generally involves |
|---|---|
| Measurement | Collecting accurate session data and preparing it for review |
| Assessment | Conducting initial and follow-up interview elements and preference assessments |
| Skill Acquisition and Behavior Reduction | Implementing teaching procedures and behavior-reduction steps as written |
| Professionalism and Requirements | Demonstrating professional conduct, communication, and ethics expectations |
| Documentation | Generating clear, accurate session notes and records |
After the assessor has observed a task being performed competently, they initial the box next to the task and mark the assessment type used. The assessment is complete only after all tasks have been competently demonstrated. Individual tasks may be tailored to your current clients and workplace parameters, so the assessment reflects the real job, not a generic lab exercise.
3 Who is allowed to assess you
The BACB is specific about assessor qualifications. The Responsible Assessor must be a BACB certificant, a BCaBA or a BCBA, who has completed the 8-hour supervision training. That person may delegate some or all of the assessment to assistant assessors who have demonstrated proficiency in the material through direct observation and who hold an active RBT certification or higher. Multiple assistant assessors may be used for a single assessment.
One independence rule protects the whole process: the assessor may not be related to, subordinate to, or employed by the applicant during the assessment. Compensation paid to the assessor by the applicant for assessment services does not count as employment, so paying a fair fee for an independent assessment is permitted.
4 The retry rules, exactly as written
This is the part candidates misunderstand most, so here is the BACB language in plain form. If you do not demonstrate competence in a task, the assessor may provide corrective feedback and assess the task with you on another day. This process must be repeated until competence is demonstrated. That is the whole retry system: feedback, practice, another day, repeat.
One detail keeps the process honest: corrective feedback may not be delivered on the final assessment of a task. In other words, the assessor can coach you between attempts, but the attempt that counts as your final demonstration must stand on its own. Treat every reassessment like it is the one that counts, because it might be.
Notice what is missing. There is no 7-day wait like the written exam, no attempt counter, and no fee schedule from the BACB. Your assessor or employer schedules the retry, and in practice most candidates reassess missed tasks within days, not months.
5 Where candidates most often miss
No one publishes failure rates per assessment task, but the task list itself tells you where the degree of difficulty lives. If you are prepping for a retry, spend your practice reps where precision is hardest to fake:
- Measurement. Accurate, real-time data collection under session pressure. Messy data sheets are the fastest way to get a not-demonstrated mark.
- Assessment. Preference assessments and interview elements. Candidates fumble the setup or skip steps because they practiced with a familiar client only.
- Skill acquisition. Implementing teaching procedures exactly as written, including prompting and the steps around it. The plan on paper and the plan in your hands feel different.
- Behavior reduction. Following the behavior plan precisely, including what to do when the plan meets reality. Improvisation is where misses happen.
- Documentation and professionalism. Incomplete session notes, sloppy communication, or ethics blind spots. These look easy until someone is grading them.
6 Do you have to redo the 40-hour training?
No. Nothing in the BACB rules requires repeating the 40-hour training because of an unsuccessful competency assessment. The training requirement is binary: complete before the assessment. What the assessment failure can affect is timing. Because the assessment must be completed no more than 90 days before you submit your application, a long, dragged-out retry process can push you outside the window. If the window expires before you apply, you complete a fresh assessment inside the new 90-day window and upload that one.
The practical takeaway: do not let a miss sit for two months. Get feedback, practice the missed tasks, and reassess promptly, while everything is fresh and your 90-day clock is comfortable.
Practice the tasks until they are automatic
The assessment grades what you can do, not what you can describe. Drill the 3rd edition task list until every procedure feels like a habit.
Open the Competency Assessment GuideLast reviewed: October 8, 2026 against the RBT Initial Competency Assessment Packet (effective January 1, 2026).