The WHO Fact Sheet on Autism Spectrum Disorders (2023) states that timely access to early evidence-based psychosocial interventions can improve the ability of autistic children to communicate effectively and interact socially. Dawson et al. (2010, Pediatrics; PMID 19948568) confirmed in an RCT that ESDM (Early Start Denver Model) at 18–30 months produced significant developmental gains.

Source: WHO Fact Sheet: Autism Spectrum Disorders (2023); Dawson et al., Pediatrics 2010 (PMID 19948568)

Core Clinical Services funding ranges $6,600-$65,000 per year based on age/needs (with a total OAP budget of $965M for 2026-27, up from $779M in 2025-26, per the Ontario Budget tabled March 26, 2026). This is direct funding—families choose public or private providers. However, intensive ABA therapy can cost up to $95,000 USD/year (2020 US cost estimate cited in FAO 2020 report; Canadian costs vary), leaving significant out-of-pocket gaps.

Source: 2026 Ontario Budget, FAO Report 2023-24

ABA therapy in Ontario costs $50-$150 per hour depending on provider credentials. Monthly costs for intensive programs (20-40 hours/week) range from $4,000 to $24,000. OAP funding covers a portion, but families typically face significant out-of-pocket expenses during the sensitive early intervention period.

Source: Ontario Provider Fee Schedules & FAO 2020 Report

Research indicates optimal early behavioral intervention for young children typically requires 25-40 hours per week for 2-3 years to achieve maximum developmental gains. EIBI (Early Intensive Behavioral Intervention) is one evidence-based approach supported by meta-analyses (Reichow et al., Cochrane 2018). The Early Start Denver Model (ESDM), studied by Dawson et al. (2010) in toddlers aged 18–30 months, is a related naturalistic developmental behavioral intervention showing significant IQ and adaptive behaviour gains.

Source: Reichow et al., Cochrane 2018 (PMID 29742275); Dawson et al., Pediatrics 2010 (PMID 19948568); BACB Professional Standards