RBT Exam: How Many Questions and How Long Do You Get? (2026 Guide)

The short answer: 85 questions, 90 minutes

I sat the RBT exam in a Pearson VUE room with a broken thermostat and a proctor who checked my glasses for cameras. I remember thinking the clock felt generous and the wording felt sneaky — which is exactly backwards from what most people expect. Now that I supervise RBTs as a BCBA, I hear the same two questions every hiring cycle: how many items, and how long do I get?

You'll see 85 questions and you'll have 90 minutes to finish them. Every item is multiple choice with 4 options and 1 correct answer — no drag-and-drop, no essays, no simulations.

Element	Detail
Total questions	85
Scored questions	75
Unscored (pilot) questions	10
Answer options per item	4 options, 1 correct
Time limit	90 minutes
Delivery	Computer-based at Pearson VUE test centers
Result reported as	Pass/fail only

Why 10 of the questions don't count

Of the 85 items, only 75 are scored. The other 10 are pilot questions — the BACB is testing them for future exam forms, and your answers on those don't move your result in either direction.

Here's the part candidates hate: they aren't labeled. You can't tell which ones are live and which are being trialed, so there's no strategy to be had. The practical takeaway is emotional, not tactical. When you hit an item that feels like it came from a different certification entirely — obscure phrasing, a scenario you've never seen in a clinic — there's a real chance it isn't counting. Mark it, answer it anyway, move on. I watched a trainee spiral over a single weird question in her mock exam and lose the thread for the next dozen items. That's the actual risk.

How the 90 minutes actually feels

Time is rarely what sinks people on this exam. The items are short, the stems are usually one or two sentences of scenario, and there's no math to grind through. Most candidates I've supervised finish with room to review flagged items.

What does eat the clock is second-guessing. RBT items often have two options that are both technically true and one that's true and within your scope as a technician. If you re-read a stem four times looking for a trick, you're burning minutes on a question that was testing whether you'd call your supervisor instead of modifying a protocol yourself.

A pacing habit that works

Take a first pass where you answer everything you know cold and flag anything that makes you hesitate for more than a beat. Then come back. Because the format is uniform — same 4 options, same single correct answer, every time — you don't need to budget different amounts of attention for different sections. Your flag list is your budget.

What those 85 questions are drawn from

Items are written against the RBT Test Content Outline (3rd edition), effective 2026, which lays out 43 tasks across 6 domains. The confirmed content areas are:

Domain	What it looks like on the exam
Data Collection and Graphing	Choosing a measurement procedure, recording continuously vs. by interval, entering and reading data on a graph
Behavior Assessment	Assisting with preference assessments and functional assessment procedures — your role, not the analyst's
Behavior Acquisition	Running discrete trials, naturalistic teaching, prompting and fading, chaining, generalization and maintenance
Behavior Reduction	Implementing plans as written, differential reinforcement, crisis procedures, describing what you observed
Documentation and Reporting	Session notes, objective description, reporting variables that affect the client, communicating with your supervisor

About the sixth domain

The outline includes a sixth domain covering professionalism and ethical conduct alongside the five listed above. I couldn't verify its exact published title, so treat the wording cautiously — but do not treat the content as optional. Scope of practice, dual relationships, confidentiality, and "who do I tell and when" show up constantly in the item pool, and they're the questions candidates most often talk themselves out of.

How the exam is scored — and why there's no passing percentage

This is the single most misreported fact about the RBT exam, so read it slowly.

The BACB does not publish a percentage or numeric cut score for the RBT exam. Scoring is criterion-referenced (a fixed standard set by an expert panel), results are reported only as pass/fail, and the BACB does not release raw scores — so there is no passing percentage to cite. Third-party claims of "70%" or a "200 of 250" scaled cut are not from the BACB.

What actually happens: the passing standard is established using the modified Angoff method. A panel of BACB-certified experts sets a fixed standard, the BACB Board approves it, and that standard does not shift based on who happens to be testing that month. You aren't competing with the other candidates in the room. Your result is computed on the 75 scored items and delivered as pass or fail — nothing more granular.

A new passing standard is set only when exam content changes significantly, which is why the 3rd edition outline matters for anyone testing in 2026. You'll be notified at the test center, by email, and in your BACB account, typically within about a week.

Why chasing a target percentage backfires

When a trainee asks me "what score do I need," what they usually mean is "how much can I skip." There's no answer, and the framing itself is the problem. Study to the point where you can explain why the three wrong options are wrong — that's the standard the panel had in mind when they judged those items.

Pass rates: what the numbers actually say

The BACB publishes an annual RBT Examination Pass Rates report broken out by 40-hour training provider, plus aggregate figures. In the 2025 report, first-time test takers passed at 79%. Retakes passed at 46%. Check the latest report before quoting these, since they're updated annually.

That gap between first attempts and retakes is the number I point supervisees to. It suggests that people who fail often go back and study the same way that didn't work the first time. If you have to retake, change the method — more application-style questions, fewer re-reads of the 40-hour training slides.

What has to happen before you get to those 85 questions

Eligibility comes first. You need to be at least 18 years old with a high school diploma or equivalent. You complete a 40-hour training based on the RBT Task List, conducted by a qualified trainer — and that training must be spread across no fewer than 5 and no more than 180 days, so you can't cram it into a weekend. Then you pass the RBT Initial Competency Assessment and complete a criminal background registry check.

On cost: there's a $50 RBT certification application fee, plus $45 paid to Pearson VUE for each examination appointment. Note that the appointment fee attaches to each appointment, which matters if you end up retaking.

Once your application is approved, you receive an authorization to test and schedule the appointment through your Pearson VUE account. That's also where the appointment is paid for. If you're still mapping out the whole path from training to certification, the RBT blog index is the place to start.

If you don't pass on the first try

You must wait 7 days after a failed attempt before retaking. A retake application becomes available through the BACB portal within 48 hours of a failed attempt, so you can get the paperwork moving before the waiting period is up.

There's a ceiling: a maximum of 8 total examination attempts within the 12-month period following application approval. In practice, almost nobody should approach that number, and I'd argue that if you're on attempt three, the fix isn't another appointment — it's an honest audit of which domains you can't explain out loud.

What I tell supervisees after a fail

Because results come back pass/fail with no raw score, you won't get a breakdown telling you where you fell short. So reconstruct it yourself while it's fresh: write down every topic you flagged, every stem that made you hesitate, and every term you couldn't define. That list becomes your study plan. It's cruder than a score report, but it's more specific to you than any generic outline.

The one-paragraph version

85 questions, 90 minutes, multiple choice with 4 options each. 75 of those items count and 10 are pilot questions you can't identify. Content comes from 43 tasks across 6 domains in the 3rd edition outline. Scoring is criterion-referenced with a fixed panel-set standard, results are pass/fail, and no passing percentage exists to aim at. Miss it and you wait 7 days, with the retake application available within 48 hours and a cap of 8 attempts in the 12-month window after approval. Prepare for the reasoning, not the clock.