Most families move through five stages, in the same order every time:

1. Intake and assessment: paperwork, insurance, and a BCBA evaluation that builds the plan
2. The first session: a low-demand visit focused on connection, not teaching
3. Ongoing sessions: regular, mostly play-based sessions that build skills
4. Progress tracking: continuous data and regular reviews with your BCBA
5. Duration and graduation: a gradual reduction in hours as goals are met

No two children follow the same timeline, but the sequence stays consistent. Here is what each stage involves.

Therapists choose a data collection method that matches the specific behavior being tracked. A few show up in almost every program [2]:

• Frequency: how often a behavior happens. Used for things with a clear start and stop, like independent requests or hitting.
• Duration: how long a behavior lasts. Used for tantrums, sustained attention, or time on task.
• Latency: how long it takes your child to respond after a prompt. Useful for measuring how well transitions or instructions are working.
• ABC data: recording the Antecedent (what happened before), the Behavior, and the Consequence (what happened after). This is how the team identifies what’s driving challenging behavior.
• Task analysis: breaking a multi-step skill like handwashing into steps and tracking which ones your child completes independently.

Most programs blend several methods, because a single one rarely captures the full picture. The ABC method in particular does double duty: it’s also central to the Functional Behavior Assessment that shapes the original plan, which our guide to the ABA intake and assessment process walks through in detail.

Increasingly, this data is collected on tablets rather than paper, which lets the BCBA see trends in near real time and graph them automatically.

Most children receive 10 to 40 hours per week. The number comes from a professional assessment and is reviewed regularly as your child progresses.

Focused programs generally run 10 to 25 hours per week. Comprehensive programs usually run 20 to 40 hours for children who need broader support [3]. The right number depends on your child’s age, current skills, treatment goals, behavioral needs, and your BCBA’s clinical judgment balanced against school, family life, and play.

The intensity a child needs is closely tied to their program type, which is one more reason the focused versus comprehensive ABA decision matters so much.

Can ABA Therapy Hours Change Over Time?

Yes. Therapy is flexible, not fixed. Your BCBA reviews progress regularly and adjusts hours accordingly, decreasing them as your child gains independence, or adding support if new challenges appear.

Curious what those hours actually look like in practice? Our guide to what a typical ABA session looks like walks through a session from start to finish.

Gathering these before you start shortens the process considerably:

• The autism diagnosis report: from a psychologist, neurologist, or developmental pediatrician. Most carriers require a formal ASD diagnosis before authorizing ABA. If your child has not been evaluated yet, ABS offers ASD evaluations in New York and New Jersey.
• Insurance card and policy details
• Prescription or letter of medical necessity from your child’s physician, if your carrier requires one
• Prior evaluations: speech, occupational therapy, psychological, or educational
• Current IEP or IFSP, if your child has one
• Reports from any previous ABA provider, including past treatment plans and FBA results

The single most common cause of intake delay is a missing or outdated diagnosis report. Carriers often require the diagnostic evaluation to be recent, commonly within the last 6 to 12 months.

The BCBA analyzes everything gathered and builds your child’s treatment plan. It includes:

• Baseline skill levels across each domain
• Specific, measurable goals prioritized by what matters most to your family
• Recommended intensity: comprehensive programs run 25 to 40 hours per week, focused programs run 10 to 25. See our guide on focused versus comprehensive ABA for how that call gets made.
• Teaching methods: which blend of DTT, NET, PRT, and VB-based instruction fits your child
• Parent training plan
• Data collection plan — how progress will be measured

You should review this plan with your BCBA before it goes to insurance. Ask questions. Push back on goals that do not match your priorities. It is your child’s plan.

Once submitted, carriers typically respond within 2 to 4 weeks. Authorization periods commonly run 3 to 6 months, after which the BCBA submits progress data to continue services. Reassessment is generally required annually.

Then therapy begins. For what that looks like day to day, see our guide to what a typical ABA session looks like.

Sessions follow a predictable rhythm. Predictability matters: when a child knows what comes next, anxiety drops and they are more available to learn.

Most sessions move through four phases:

1. Pairing and Warm-up (first 10–20 minutes)

The therapist reconnects with your child through preferred activities before asking anything of them. This is the same pairing process used in the first session, repeated briefly at the start of every session. Research supports pre-session pairing as a way to reduce interfering behavior during the teaching that follows [2].

2. Targeted Skill Building (the core of the session)

The therapist introduces the specific goals your child’s BCBA has written into the treatment plan. These might be requesting a snack, imitating a clap, identifying colors, washing hands, or answering a simple question. Each target is taught in short trials with immediate reinforcement for success.

3. Natural Practice and Generalization

The therapist moves the same skills into real situations, the kitchen, the yard, the hallway. A child who can request “juice” at a table has learned a skill. A child who requests juice at the actual refrigerator when they are actually thirsty has learned to use it.

4. Breaks and Free Play

Children get regular, genuine breaks. These are not a reward the child has to earn, they are built into the session structure because attention is finite and forcing a tired child to continue produces nothing but resistance.

These phases are not rigid blocks. A skilled RBT moves between them fluidly based on your child’s energy, focus, and mood on that particular day.

Every session produces data. This is what separates ABA from interventions that rely on impression and memory.

Throughout the session, the therapist records whether each trial was correct, incorrect, or prompted and at what prompt level. They may also track frequency of specific behaviors, duration of activities, or independence on multi-step routines [7].

That data goes to the BCBA, who reviews it and adjusts the program. If a target is mastered, it moves to maintenance and a new one is introduced. If a target is stalling, the BCBA changes the teaching approach rather than repeating a method that is not working.

Data collection is also why you should never feel awkward asking to see it. A provider who cannot show you your child’s data, or explain what it means, is not running a data-driven program.