The Deputy Prime Minister of Australia is the second-most senior officer in the Government of Australia. The office is a recognised ministerial post and a political convention rather than a separate constitutional office, with its modern form established in the late 1960s. The holder normally sits in Cabinet, carries a substantial ministerial portfolio, and acts for the Prime Minister when that person is absent or incapacitated.
Role and responsibilities
The Deputy Prime Minister performs a mix of formal and practical duties. Formally the person is a minister with portfolio responsibilities; informally they are the Prime Minister's principal deputy and second-in-command within the ministry. Typical duties include acting as Prime Minister during overseas travel or illness, representing government in major forums, chairing meetings when delegated, and undertaking high-level negotiations on behalf of the government.
- Acting Prime Minister: steps in when the Prime Minister is unavailable.
- Cabinet membership: participates in collective decision-making and policy formation.
- Ministerial responsibilities: holds a separate portfolio or multiple portfolios.
Appointment and political context
The Deputy Prime Minister is appointed by the Governor-General on the advice of the Prime Minister. The precise method of selection depends on party practice: in single-party governments the office is usually held by the deputy leader of the governing party, while in coalition governments it is commonly held by the leader of the junior coalition partner. The position is therefore a product of political convention and party rules rather than direct constitutional specification.
Although the title and functions are widely recognised, the office is typically combined with other ministerial duties. This means the Deputy Prime Minister's influence flows both from their formal rank and from the authority of the portfolios they hold and their standing within their party or coalition.
Historically, the term "Deputy Prime Minister" was used informally for many decades before being created as a formal ministerial portfolio in the 1960s. Since formalisation, the role has been shaped by political practice and coalition arrangements. Notable conventions include the expectation that the deputy leader of a party will assume the role when their party governs and that the Deputy Prime Minister may succeed to the leadership of their party and, in some cases, later become Prime Minister.
For readers seeking further background or official information, consult general resources on Australian government and ministerial offices. Useful starting points include overviews of the parliamentary system and party procedures that determine leadership selection and ministerial appointments: see Government of Australia summaries and guides to ministerial roles, as well as more detailed treatments of the Governor-General's reserve and appointment powers at constitutional and vice-regal reference materials.
Because the office rests on convention and political practice, its precise influence and responsibilities can vary between governments, shaped by the personalities, party agreements, and portfolios held by each officeholder. For comparative purposes or historical lists of officeholders consult comprehensive political histories and official records at trusted government and academic sources.