"A game changer for the city of Melbourne" — Prime Minister Anthony Albanese
The Suburban Rail Loop (SRL), a major rail infrastructure project in Melbourne, Victoria, has received an additional A$3.8 billion in federal funding, bringing the total Commonwealth commitment to A$6 billion. The project, estimated to cost A$34.5 billion for its first stage (SRL East), faces uncertainty ahead of the November state election, with the opposition pledging to pause and review it.
Project Scope and Timeline
The SRL is a planned 90 km underground railway loop around Melbourne. Stage 1 (SRL East) connects Cheltenham in the south-east to Box Hill. Future stages (SRL North and West) would extend the line to Melbourne Airport and Werribee in the south-west.
The project was first announced by former Premier Daniel Andrews in 2018. Construction contracts worth $13 billion have been signed, including two tunneling contracts valued at $5.3 billion and $6.7 billion. The Victorian government has allocated approximately $11.8 billion for Stage 1. Tunneling is scheduled to begin later in 2025, with train operations planned to commence by 2035.
A 2021 business case estimated SRL East would cost up to A$34.5 billion and carry about 71,000 daily passengers by 2036. A 2022 analysis by Victoria's independent parliamentary budget office estimated construction costs for the first two stages could reach A$125 billion by 2084-85.
Federal Funding Announcement
Prime Minister Anthony Albanese announced an additional A$3.8 billion in federal funding, to be delivered over four years. The funding is designated exclusively for the SRL and will not be transferred to alternative projects. This brings total federal contributions to over A$6 billion. State government sources indicated that a $9.3 billion commitment over a decade was considered.
The additional federal funding was already accounted for in the state budget. Victorian Premier Jacinta Allan has sought federal funding covering one-third of the project's cost. The state plans to cover another third, with the remainder expected from value capture (local taxes).
Infrastructure Australia Assessment
Infrastructure Australia has elevated the SRL to its highest priority list, marking the first time the project has received high-priority status from the federal advisory body.
"The report is an 'investment blueprint' identifying high-priority proposals to address critical infrastructure gaps." — Adam Copp, Infrastructure Australia CEO
Last year, Infrastructure Australia evaluated the project and found the state government's business case lacked sufficient detail and relied on future stages to justify its benefits. At that time, the body urged development of "exit strategies" if the plan proved undeliverable.
In a March 2025 report, Infrastructure Australia stated the train link is now a national priority warranting immediate investment. The report identifies SRL East as an immediate priority for delivery investment. Future stages were identified as "future investment opportunities in the 5-10 year pipeline."
Cost Concerns
The project has faced scrutiny due to cost increases. Cost estimates have risen at least 22% since 2019, with some builders warning of up to 35% increases. Federal Opposition infrastructure spokesperson Bridget McKenzie criticized the conditional funding arrangement.
Despite these concerns, Victorian minister for the SRL, Harriet Shing, stated the project "is on time and on budget," citing the 2021 business case estimate of $31 billion to $34.5 billion.
Political Positions
Federal Government: Prime Minister Albanese stated the SRL is "a game changer for the city of Melbourne" that will improve travel times and business opportunities. Federal Transport Minister Catherine King indicated the federal government provides funding through its usual budget processes, with states responsible for planning, design, and delivery.
State Government: Premier Jacinta Allan said, "In the Albanese Labor Government we have a partner in Canberra who gets what our growing state needs."
State Opposition: Opposition leader Jess Wilson has committed that if the Coalition wins the November state election, the party would pause and review the project, potentially cancelling it. This would be the first instance in Australia of a government cancelling a major project after tunnel boring machines were in the ground. Wilson is scheduled to outline more fiscal plans in a post-budget speech. Other Coalition savings measures include capping public service executive salaries and abolishing the treaty body Gellung Warl, saving about $100 million annually.
Federal Opposition: Infrastructure spokesperson Bridget McKenzie criticized the conditional funding arrangement.
Election Context
Seats along the proposed rail line, currently held by Labor, are anticipated to be significant battlegrounds in the upcoming state election. The project's future is a key election issue for both major parties.