Developmental milestones are the skills and behaviors that most children reach by certain ages — rolling over, pointing, saying first words, playing alongside other kids. Pediatricians use them as reference points, and parents often use them to gauge how their child is doing compared to peers. When a child on the autism spectrum misses a milestone or reaches it much later than expected, it can feel alarming. But missing a milestone is not a verdict. It is information — a signal to seek support, not a reason to panic.

This guide explains what typical milestones look like across different areas of development, how autism can affect them, and how therapies like ABA therapy help children build skills at their own pace.

How Developmental Milestones Work

Milestone charts describe what most children can do by a certain age — not what all children must do on a precise schedule. There is a range of typical development, and individual variation is normal. That said, milestones exist for a reason: they reflect well-documented patterns of development, and significant or persistent delays across multiple areas are worth investigating.

For children with autism, development often looks uneven. A child might have advanced vocabulary but struggle to use language socially. Another child might have excellent fine motor skills but significant challenges with communication. Understanding this profile — where a child excels and where they need support — is more useful than comparing them to a single developmental chart.

Communication and Language Milestones

Communication is one of the areas most commonly affected by autism. Typical language milestones include:

  • By 12 months: Babbling, using gestures, responding to name
  • By 18 months: Using at least a few single words meaningfully
  • By 24 months: Combining two words, following simple two-step directions
  • By age 3: Speaking in short sentences, being understood by familiar adults most of the time

Children with autism may reach these milestones later, in a different sequence, or not at all without support. Some children use echolalia — repeating phrases from books, TV, or previous conversations — rather than generating original language. Some are minimally verbal and communicate most effectively through augmentative and alternative communication (AAC), such as picture exchange systems or speech-generating devices.

What matters is that the child has a way to communicate — and that caregivers and therapists are working to expand that capacity, whatever form it takes.

Social and Emotional Milestones

Social development involves learning to connect with others, share attention, read social cues, and navigate the give-and-take of interaction. Typical social milestones include:

  • By 2 months: Social smile in response to faces
  • By 9 months: Joint attention — following a caregiver’s gaze or point
  • By 18 months: Showing objects to others to share interest, not just to get help
  • By age 3: Engaging in simple cooperative play, showing empathy, taking turns

Children with autism often experience social milestones differently. Joint attention — the ability to share focus on something with another person — is one of the earliest and most important social skills, and it is frequently an area of relative difficulty. A child may prefer solitary activities, have limited interest in peer interaction, or find the sensory and social demands of group settings overwhelming.

It is equally important to recognize what children with autism do bring to social connection: many form strong, genuine bonds with family members, show clear preferences and affection, and demonstrate care for others in ways that are meaningful and real, even if they look different from typical social behavior.

Motor Milestones

Motor development includes both gross motor skills (large movements like walking, running, jumping) and fine motor skills (precise movements like grasping, drawing, or using utensils). Most children with autism reach gross motor milestones within typical ranges, though some experience delays or differences in motor planning and coordination.

Fine motor skills are more commonly affected. A child might struggle with tasks that require precision — holding a pencil, fastening buttons, managing a fork. These challenges can affect school readiness, self-care, and participation in daily activities. Occupational therapy can address fine motor goals directly, and at Autism Centers of Utah, OT is available on-site for ABA clients whose treatment plans include it. Learning why daily living skills matter in autism therapy can help families understand how these goals connect to long-term independence.

Sensory processing differences are also common and closely connected to motor behavior. A child who seeks intense physical input — spinning, jumping, crashing into things — or who avoids certain textures and movements is responding to how their nervous system processes sensory information. Understanding this can help families and therapists make sense of behaviors that might otherwise seem puzzling.

Adaptive and Daily Living Milestones

Adaptive skills — sometimes called daily living skills — are the practical abilities that allow a child to function independently in everyday life. These include dressing, feeding oneself, toileting, following routines, and eventually navigating school and community settings. Typical adaptive milestones include:

  • By age 2: Beginning to use a spoon, pulling off socks and shoes, washing hands with help
  • By age 3: Beginning to dress and undress with assistance, using the toilet with support
  • By age 4–5: Dressing independently, managing basic hygiene tasks, following multi-step routines

Children with autism frequently need more time and structured support to develop adaptive skills. Sensory sensitivities can make certain tasks — like tolerating clothing textures, accepting tooth brushing, or sitting at a meal — genuinely difficult rather than simply resistant. Visual supports, task breakdowns, and consistent routines can make a significant difference in helping children build these skills.

How ABA Therapy Addresses Milestone Delays

Applied Behavior Analysis is an evidence-based approach that focuses on teaching skills through structured learning, clear expectations, and positive reinforcement. In the context of developmental milestones, ABA therapy is particularly effective because it breaks skills into teachable steps, tracks progress through data, and adjusts the approach based on what the data shows.

At Autism Centers of Utah, BCBAs assess each child’s current skill levels across communication, social, adaptive, and behavioral domains before designing a treatment plan. That plan targets the skills most meaningful to the child and family — the ones that will make the biggest difference in daily life. RBTs deliver therapy directly, guided by the BCBA’s clinical design and supervision.

ABA is not a single rigid method. It encompasses discrete trial training (structured, repeated practice of specific skills), natural environment teaching (building skills through play and everyday routines), and other evidence-based techniques selected based on what works best for each child.

When a Missed Milestone Should Prompt Action

If you notice that your child is not reaching milestones in one or more areas — or if they lose skills they previously had — that is a signal to seek an evaluation. You do not need to wait until the delay is severe or until multiple areas are affected. Earlier evaluation means earlier access to support. Our post on the early signs of autism in young children walks through what to watch for by age.

Talk to your pediatrician first. If you have concerns that are not being addressed, you can also contact a center like Autism Centers of Utah directly. Our team is happy to answer questions about what we see in children at different developmental stages and whether an assessment might be helpful.

Frequently Asked Questions

Do all children with autism miss developmental milestones?

Not necessarily. Development in autism is uneven — a child may reach some milestones on time or early while needing significant support in other areas. Every child’s profile is different.

Can a child catch up on missed milestones with therapy?

Many children make significant progress with early, consistent intervention. The goal of therapy is not to force a child into a neurotypical mold but to help them build functional skills that support their independence and quality of life. Families looking into services for younger children can explore early autism services for toddlers and what the process looks like.

What is the difference between a speech delay and autism?

A speech delay refers specifically to delayed language development. Autism is a broader condition that includes social communication differences and restricted or repetitive behaviors. A child can have a speech delay without autism, and many children with autism have language delays — but the two are not the same thing. An evaluation can clarify the picture.

At what age is it too late to start ABA therapy?

Autism Centers of Utah serves children ages 2 through 12. Research supports the benefits of ABA across the lifespan, though the nature of goals and the intensity of services may look different at different ages.

How do I know which milestones to watch for?

The CDC’s “Learn the Signs. Act Early.” program provides free milestone resources for parents. Your child’s pediatrician is also a key resource and should be administering developmental screenings at regular well-child visits.

If you have questions about your child’s development or want to learn more about how Autism Centers of Utah supports children in the Sandy, Riverton, and Midvale areas, call us at (385) 417-3869. Our team is ready to walk you through the process and answer whatever questions you have.