How many ABA therapy hours does my child need?

There is no fixed number.

A clinic can recommend 40 hours a week. What your child actually receives is what Colorado approves as medically necessary, and that is judged on your child rather than on their diagnosis label.

So the number a clinic opens with is a starting position, not a verdict. In parent forums the question usually arrives as “the clinic said eight hours a day, is that normal?”

Budding Futures builds plans around what a child can actually absorb in a week alongside school, speech and OT. We deliver ABA in the home and, where a district agrees, inside school. We do not provide speech therapy or occupational therapy ourselves, so we have no reason to talk you out of them.

Start here: your child's age and school status

Find the row that matches your child today.

What the support level changes

Level describes how much support your child needs, not a number of hours. It shapes the goals, and the goals drive the schedule.

What the research actually found about hours

The largest study of ABA dosage followed 1,468 children aged 1.83 to 12, across eight states including Colorado.

Linstead 2017, Translational Psychiatry. Observational, not a randomised trial, so it shows what happened rather than what will happen. Full citation below.

What the recommended hours usually look like

Families are quoted a small set of numbers over and over. It helps to know what each one usually signals before you walk into the meeting.

• 10 hours per week or fewer. Usually a focused ABA program aimed at a short list of goals, often behaviour or a specific skill.
• Around 20 hours. A middle path, common once a child is in preschool or school for part of the day.
• 25 to 40 hours per week. Usually described as comprehensive or intensive ABA, and most often proposed for younger children before they start school.

None of these is a rule. The Council of Autism Service Providers publishes practice guidelines for the field, but its full document sits behind a licence, so treat any number a clinic quotes as their clinical opinion rather than a published standard. Ask them to show you the reasoning for your child.

How a BCBA decides the number

A behavior analyst does not pick a number from a chart. They assess your child, write goals, and the schedule follows. That is why the answer varies so much between two children who share a diagnosis.

What they weigh when they determine how many hours to request:

• Which goals are active. Safety goals and communication goals usually carry more weekly time than a single skill goal.
• Where your child already spends the day. School, preschool or daycare changes what is realistic.
• How your child is responding. Session data should move the plan, not just document it.
• What your family can sustain. A schedule nobody can keep is not a plan.

You will also hear about delivery settings. Center-based ABA runs at a clinic, and it is the main alternative to in-home work. Budding Futures does not run a center. We deliver ABA in the home and, where a district agrees, inside school, because that is where the skills actually get used.

What goes into an ABA treatment plan

The hours are an output of the treatment plan, not the starting point. A board certified behavior analyst assesses your child, writes goals, and the number of therapy sessions follows from those goals.

That is why two children with the same diagnosis can receive very different ABA therapy hours. Applied behavior analysis is individualised by design, and a behavior analyst who cannot explain why your child needs a specific number has not finished the work.

Ask to read the treatment plan itself. You are entitled to it, and it should name each goal, the skill being taught, and how progress will be measured.

How ABA therapy hours change over time

Hours are not meant to stay flat. A good ABA program starts where the goals are, then steps down as your child masters skills and generalises them into daily life.

For many children the pattern looks like a higher-support period in early childhood intervention, then a gradual reduction as school takes over more of the week. Social skills, caregiver coaching and independence goals usually outlast the intensive behaviour goals.

If your child's hours have never changed, that is worth raising with your ABA therapist at the next review.

What Colorado actually approves

Health First Colorado covers behavioral therapy for members 20 and younger who meet EPSDT medical necessity criteria. Every service needs prior authorization before treatment starts.

Two details from the state’s own rules change how you should read any hours recommendation:

• The approval sets the hours. The state says that if the request is approved, “your provider will receive notification of the number of hours that behavioral health services may be provided to you.”
• It resets every six months. Each approved authorization is valid for up to six months, and a new one must be submitted after that.

How ABA, speech and OT are allowed to overlap in Colorado

Colorado publishes a co-treatment matrix in its billing manual. For a behavioral therapist working alongside an outpatient occupational, physical or speech therapist, the rule reads:

“Providers will only bill for the time interacting with the member, and not the total time in the room. Must have clear, joint goals in PAR and with approval.”

Health First Colorado, Pediatric Behavioral Therapy billing manual

In plain terms, two therapists can work with your child together, but only when they have written shared goals and the state approved it in advance.

That makes one question worth asking at your next meeting: who owns which goal? When speech, OT and ABA all list communication, your child gets the same skill taught three different ways.

Why how long usually matters more than how many

The largest study of ABA dosage looked at 1,468 children and measured both intensity and duration. Both mattered. Duration mattered far more.

Children in that study received an average of 58.8 hours a month and stayed in therapy for just under 14 months on average. Both numbers sit well below what many families are quoted at intake.

It is observational, so it cannot prove a longer, lighter plan causes better outcomes. It is still a real signal, and it matches what parents describe. A schedule a family can sustain for two years tends to beat one they abandon in four months.

How to push back without losing the authorization

Pushing back is normal and it does not put your coverage at risk. The authorization is a clinical request, and clinical requests can be discussed.

• Ask which specific goals require the recommended hours.
• Ask to start lower and review at the six-month mark with data.
• Ask how your child’s fatigue will be measured, not just their progress.
• Ask which goals belong to speech or OT rather than ABA.

If a provider cannot answer those questions clearly, that is useful information about the provider.

Talk it through with a BCBA

If you are holding a recommendation you are unsure about, a second read costs nothing. Budding Futures serves families across Colorado, in the home and in school settings, and we will tell you plainly if the hours in front of you look like more than your child needs.

Related reading: autism support levels explained, comprehensive versus focused ABA, ABA and speech therapy compared, school-based ABA in Colorado, and how Medicaid covers ABA in Colorado.