Illinois Early Intervention to IEP Transition: What Happens When Your Child Turns 3

Your child has been receiving early intervention services under an IFSP — speech therapy, OT, developmental therapy, maybe more. In a few months, they turn 3, and everything changes. A different state agency takes over. Different rules apply. Different evaluations are required. And if the timing slips, your child could lose services entirely during the gap.

The transition from Illinois Early Intervention (Part C of IDEA) to school-based special education (Part B of IDEA) at age 3 is one of the most stressful points in the IEP process for families. Understanding the mechanics ahead of time makes it manageable.

Two Different Systems, Two Different Laws

Illinois Early Intervention is a program run by the Illinois Department of Human Services (IDHS). It serves children from birth to age 3 who have developmental delays or established conditions. Services are delivered in natural environments — typically at home or in a daycare setting — and are governed by IDEA Part C.

When a child turns 3, they age out of IDHS Early Intervention and become the responsibility of the local school district under IDEA Part B. At that point, services move from an Individualized Family Service Plan (IFSP) to an Individualized Education Program (IEP). The service delivery model changes completely: instead of home-based therapy through an EI provider, the child may receive services in a school-based Early Childhood Special Education (ECSE) classroom or through related services at school.

This is not a smooth handoff. It requires a new evaluation, a new eligibility determination, and a new planning meeting — all conducted by entirely different people under different rules.

The Transition Timeline You Need to Know

At least 90 days before the third birthday: The Early Intervention service coordinator should initiate the transition planning process and notify the local school district that your child will be turning 3. Under Illinois law, a Transition Planning Conference must be held. This meeting involves both the EI service coordinator and representatives from the receiving school district.

At this meeting, the team reviews your child's current IFSP, discusses what evaluation the school district will need to conduct, and identifies potential placement options. You should leave this meeting with a clear sense of when the school district will contact you about evaluations.

Before the third birthday: The school district conducts its own evaluation to determine if your child qualifies for Part B special education services. This is a fresh evaluation — the district doesn't simply accept the EI records, though they can and should use them as part of the data they review.

The school district follows the same timelines as any other evaluation: once you sign consent, 60 school days to complete the evaluation. But there's a catch: if the 60-school-day window would extend past the child's third birthday, the IEP must be ready and in place by the third birthday. The clock doesn't simply run out and start fresh after the birthday.

By the third birthday: If your child is found eligible under Part B, the IEP must be implemented on the day they turn 3. Services cannot start the week after. Not "soon." On the birthday.

What Changes and What Doesn't

Services may change. Early Intervention services are based on the family's identified needs in addition to the child's developmental needs. School-based IEPs focus specifically on what the child needs to access the school curriculum. A child who received 2 hours of speech therapy per week under EI may receive significantly more or significantly less under the IEP — the standard for what's "appropriate" is different.

Location changes. EI services come to the child. School-based services require the child to come to school (or a school program). If your child has never been in a group setting, the adjustment to an Early Childhood Special Education classroom can be significant.

Your rights change — and expand. Under Part C (EI), families have fewer formal procedural protections than under Part B. Once your child is on an IEP, you have the full IDEA parent rights package: Prior Written Notice, right to request an IEE at district expense if you disagree with the evaluation, right to access all records within 10 business days under the Illinois School Student Records Act, and due process rights.

Eligibility categories change. Early Intervention uses a developmental delay framework. Schools use the 13 federal IDEA disability categories. A child receiving EI for "global developmental delay" may qualify for Part B under autism, speech/language impairment, or developmental delay (which is available as a category in Illinois for children ages 3-9). The evaluating team determines which category applies.

What to Do if Your Child Is Found Ineligible

Not every child who receives EI services will qualify for Part B. The eligibility standards are different, and some children who benefited from EI at age 2 have made enough progress to no longer meet the threshold.

If your child is found ineligible, the district should offer a Prior Written Notice explaining the determination. You have the right to:

• Request an Independent Educational Evaluation at district expense if you disagree with the evaluation
• File a state complaint with ISBE if you believe the evaluation was procedurally flawed
• Ask the district what other services (like a 504 plan or general education support services) might be available

Being found ineligible at age 3 does not close the door permanently. You can request a re-evaluation at any time if your child's needs change.

Practical Steps to Take Now

If your child is approaching the transition from EI, take these steps:

1. Ask your EI service coordinator when the Transition Planning Conference will be scheduled. It should happen no later than 90 days before the third birthday. If it hasn't been mentioned and the birthday is within 6 months, ask now.

2. Request your child's complete EI records including evaluation reports, IFSP documents, and progress notes. You'll want these for the school district's evaluation team.

3. Write down your child's current therapy goals and the progress they've made. The school district's evaluators may spend only a few hours with your child. Your running documentation of what's working and what's still challenging is valuable context.

4. Ask the school district about their Early Childhood Special Education programs. What classrooms are available? What does a typical day look like? What is the staff-to-student ratio?

5. Know that you can disagree. If the district's evaluation concludes your child doesn't qualify, or if the proposed IEP seems inadequate compared to what EI was providing, you don't have to sign it on the spot. Ask for time to review, consult with your EI providers, and request documentation.

The full guide to navigating Illinois IEP evaluations — including letter templates, timeline checklists, and what to do when the district doesn't move fast enough — is at specialedstartguide.com/us/illinois/iep-guide/.

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