What 'caseload' actually means in ABA
In ABA, a caseload is the number of clients a single BCBA — the master's-level clinician who designs and oversees treatment — is responsible for at one time. It is one of the most important numbers in the whole field, and it is almost never printed on a website. That should tell you something.
The number matters because the BCBA is the brain of your child's program. They write the plan, read the session data, adjust the targets, train the RBT who does the direct work, and coach you. The Behavior Analyst Certification Board is explicit that supervision quality depends on a manageable caseload. When the number climbs, the quality of every one of those tasks quietly erodes.
The industry number
The average BCBA in private practice supervises somewhere between 12 and 16 clients. Plenty carry 20 or more. At those levels, a BCBA is not really supervising — they are triaging. They see the child who is in crisis this week and hope the other fifteen are holding steady.
For your family, that looks like specific, recognizable things: progress reports that arrive a month late, a rotating cast of RBTs because the supervisor cannot keep them supported, and a treatment plan that drifts because no one has had time to sit with the data and update it. None of this means the people are bad at their jobs. It means the math was set up against them.
Our number
We deliberately keep our BCBA caseloads low. We hire toward that on purpose and protect it even when it would be easier, in a given month, to let it creep. It costs more to run a practice this way, and we bill the same insurance rates everyone else does.
The reason the math still works is not complicated. When BCBAs are not drowning, they stay — so we are not constantly paying to recruit and onboard replacements. Plans are written well the first time, so fewer authorizations get denied and reworked. Lower turnover and cleaner paperwork pay for the smaller caseload. We decided that was a better place to spend the money than on a bigger roster.
A BCBA managing 16 cases is not supervising them. They are surviving them.
What it means for your child
When your BCBA carries eight families instead of sixteen, your child stops being an item on a list. Your BCBA actually reads the session notes every week, not whenever the month-end report is due.
Your RBT has a real person to call when something is not working on a Tuesday afternoon, instead of waiting for the next scheduled check-in. Your plan gets updated when your child is ready to move forward, not when the supervisor finally finds an hour.
And you, the parent, are not someone's twelfth phone call of the day. When you text your coordinator a question at 8pm, the person who answers has the bandwidth to actually know who Lucas or Maya or Sam is without pulling up a file to remember.
What to ask any ABA provider you talk to
You do not have to take anyone's word for it, including ours. Ask any provider you are considering for the exact number of clients their BCBAs carry. Ask how often supervision actually happens. Ask what their RBT turnover rate is, and ask specifically what happens when an RBT leaves in the middle of your child's treatment.
Write the answers down. A provider who gives you a clear number is showing you how they run. A provider who will not give you a number, or who answers a different question than the one you asked, is also telling you something — you just have to be willing to hear it.