Ontario operates a centralized waitlist model where families must wait to receive an "invitation" for funded core clinical services. As of the March 2026 FOI data, 89,799 children are registered, but only 23% receive funded services. The remaining 77% are on the waitlist, with average waits of 5+ years (ETWO analysis of MCCSS FOI data).
The $570M+ annual funding gap (FAO 2020 estimate at 2018-19 service levels) represents the difference between what Ontario would need to fund all registered families at OAP rates and what is currently budgeted. Children age out of the critical early intervention window (ages 2–5) while waiting, causing irreversible developmental harm.
These Ontario figures establish a serious Ontario access problem. They do not, by themselves, establish Ontario's rank against provinces that publish different measures.