Walking to the house for the 2019 budget presentation at Parliament are (from left) Greens leader James Shaw, Finance Minister Grant Robertson, Prime Minister Jacinda Ardern and Deputy Prime Minister Winston Peters. Photo: Getty

The government's first Wellbeing Budget has been revealed - here's what you need to know.

Mental Health: $1.9 billion package over five years includes new universal frontline mental health service aimed at helping 325,000 people by 2023/24

Suicide prevention: $40m over four years in suicide prevention services

Nurses in schools programme expanded to decile 5 secondary schools to support young people's mental wellbeing

Whanau Ora: $80 million boost to expand coverage

KiwiRail: $1bn to redevelop the rail system including $375m for new wagons and locomotives and $331 for track and infrastructure

Auckand's City Rail Link: $405.5 new capital investment for the Crown's share of cost increases

Tackling child poverty: Budget confirms $535m package for lifting incomes including indexing main benefits to wage increases and lifting abatement thresholds.

Extra funding for decile 1-7 schools to replace parents' donations

Climate change: $95m on science and research including on new energy technologies, and $25m over four years on helping agriculture deal with the effects of climate change

Venture Capital: $300m fund for investing in New Zealand venture capital markets

Homelessness: Budget confirms $197m over four years to fund 1044 Housing First places