Objective The aims of this study were to quantify Australian federal and state government expenditure on mental health carer services for 2014-15, map the types of services being provided and explore how funded service types compare with the evidence base for the outcomes of these carer services. Methods Web searches were conducted to identify in-scope mental health carer services in Australia funded by federal and state and territory governments. Funding estimates were confirmed where possible with available government and carer organisation contacts. A literature search was conducted for reviews of studies investigating mental health carer service outcomes. Results In 2014-15, the estimated Australian national, state and territory government expenditure on mental health carer services was approximately A$90.6 million. This comprised A$65.6 million in federal expenditure and A$25.0 million in state and territory expenditure. Most funding streams provided respite and psychoeducation. The literature showed positive carer outcomes for psychoeducation and intensive family interventions. Evidence was lacking for the effectiveness of respite services. Conclusions These findings suggest a mismatch between what is known about the extent to which different service types deliver positive carer outcomes and the current allocation of funds across Australia's mental health system. This study also highlights the fragmentation of the mental health carer services system, supporting the need to streamline access.