Monash Linked-Data Study Shows Income Gap in Australian Child Psychotherapy Access Rose from 14 to 23 Points 2014-2023

The Monash Centre for Health Economics cohort tracked every Australian who received a Mental Health Treatment Plan between 2014 and 2023. Access fell overall from 63% to 45% for children and from 58% to 48% for adults, yet the absolute income differential widened from 14 to 23 percentage points among children and from 8 to 15 points among adults. Average inflation-adjusted out-of-pocket costs for the first psychotherapy visit doubled to $90 for children and $80 for adults. The companion Australian Health Review analysis of 2.7 million adults confirmed persistently lower uptake in both regional and metropolitan disadvantaged postcodes.

Because the study is observational, it cannot isolate causation; rising copayments, psychologist shortages, and longer wait times in poorer areas are all plausible mediators. The design does, however, condition on prior GP contact, removing the first barrier and isolating the second-stage equity failure. Similar gradients appear in UK IAPT and Canadian provincial data, suggesting the pattern is not unique to Australia's fee-for-service model.

If out-of-pocket costs continue their trajectory and bulk-billing rates keep declining, the child gap is projected to exceed 30 points by 2027. Policy levers that could be tested include raising the Medicare rebate floor, targeted regional workforce incentives, and stepped-care triage that prioritizes low-income patients for earlier psychologist appointments.

Next required evidence includes a difference-in-differences evaluation of any rebate increase and longitudinal tracking of mental-health-related emergency presentations and school absences stratified by income.