Explainer | The Auckland City Rail Link: Effective, Efficient and Economical?
Written by Samreen Kaur
The Auckland City Rail Link (CRL) had its long-awaited, grand opening on the 13th of September 2026.
What is the City Rail Link?
The CRL is a 3.45km double-track underground rail line that will turn Waitematā Station into a two-way through-station, linking the system to two new underground stations: Te Waihorotiu, in midtown, and Karanga-a-Hape (with entrances at Mercury Lane and Beresford Square). The new line will connect to a redeveloped Maungawhau (Mount Eden) Station, where it will rise to the surface to meet the existing Western Line. The CRL project also includes wider rail network improvements, including upgrades at The Strand, Ōtāhuhu, Henderson, and Newmarket; provision for longer nine-car electric trains; and more people-friendly spaces around the city (City Rail Link Ltd, n.d.-b).
What are the CRL's Costs?
The CRL is New Zealand's largest infrastructure project to date, and its costs have escalated significantly across three main stages. First, Auckland Transport's 2015 Business Case for the CRL estimated the project's cost between $2 and $3 billion, accounting for a 20% margin of error on either side of the estimate. Second, in 2016, a formal Heads of Agreement was signed by Mayor Len Brown and Transport Minister Simon Bridges (Auckland Council, 2016). This agreement set out a 50/50 funding split between Auckland Council and the Crown, established City Rail Link Ltd as the company to oversee project delivery, and assigned Auckland Transport to handle technical and operational delivery. Third, in 2019 CRL Ltd announced its preferred contractor, alongside a "rigorous and comprehensive review of project costs", identifying a $1 billion increase over the earlier ~$3 billion figure (City Rail Link Ltd, n.d.-a). Accordingly, in May of 2019, the Council and Government jointly approved a cost of $4.419 billion (Bevin, 2023). However, the total costs in 2026 came to be a total $5.493 billion.
Pandemic Costs
The Covid-19 pandemic significantly affected the CRL's total costs, with the project ultimately facing a $1 billion "budget blowout" in 2023, raising the total project costs from $4.419 billion to $5.493 billion (Bevin, 2023). The overall consensus was that the cost increase was primarily a consequence of inflation and Covid-19: CRL chief executive Sean Sweeney explained that "in Auckland we endured two level four lockdowns, a further 280 days of restricted working conditions and we lost 3.2 million hours through illness among staff" (McGregor, 2023). Nevertheless, the costs have remained at the original 50/50 funding arrangement between Auckland Council and the Crown, and the project's completion date was estimated to be pushed back a year to 2025 (Bevin, 2023), however, ultimately concluding in September 2026. Mayor Wayne Brown argued the council had insufficient say in decisions driving the cost increase, telling RNZ's Morning Report that "I'll be going to the government and saying, 'Listen here mate, we didn't have 50% of the decision making [...] The people that made the decision were from Wellington and inexperienced in my view'" (McGregor, 2023).
Critiques & Opposition
Some of the strongest criticism of CRL's cost has come from within the project itself; the former CRL chief executive Sean Sweeney, who has since moved on to lead Dublin's Metro Link, has acknowledged that CRL was over-specified and over-engineered (NZ Herald, 2026), estimating that the project could have been delivered for "half its final cost" had a leaner design been adopted (NZ Herald, 2026). In an NZ Herald interview, Sweeney compared the CRL unfavourably to Copenhagen's metro system, which has implemented small stations all throughout the city, operating three-car trains and stripped-back stations with minimal amenities. Copenhagen's project was fulfilled at around a quarter of CRL's cost, whereas CRL's stations were built for longer nine-car trains, longer platforms, and considerably more escalators per station. Sweeney noted that the decision to build to nine-car capacity was made before he became CEO, driven by fears that the network would otherwise be overwhelmed within a few years, a concern he now believes could have been managed simply by running trains more frequently.
Sweeney associates this practice to a broader tendency within New Zealand infrastructure sector to "gold-plate" major projects. He draws a comparison between the Christchurch stadium, built at four times the cost of Dunedin's equivalent. Mayor Wayne Brown has reproduced this critique, describing CRL's stations as "cathedrals" and acknowledging that the project went too far in terms of expenditure (NZ Herald, 2026). The 2022 Auditor-General review furthermore found that KiwiRail and Auckland Transport would need to spend a further $6.7 billion between 2022 and 2036 before CRL's full benefits could even be realised (Office of the Auditor-General, 2022).
Economist Jim Rose's Taxpayers' Union (NZTU) report highlighted that both the Treasury and the Ministry of Transport had advised ministers in 2015 that the CRL's economic case was "weak," and that this advice was never passed on to Cabinet (Rose, 2023). At the time, the CRL was estimated to cost $3.4 billion, with a cost-benefit ratio of 1.6 (meaning every dollar spent was expected to return $1.60 in benefits). However, with costs rising to $5.5 billion, Rose claims that the project has "exceeded any reasonable estimate of its benefits." Rose states in the report's conclusion that the CRL project is a "white elephant, a monument to future generations of the sunken cost fallacy" (Rose, 2023).
Benefits & Support for the CRL
While the financial critiques are widely shared in the discourse, there has also been a wealth of support. Auckland Council's Annual Plan (ACAP) for 2026/2027 highlights key points on how the CRL will benefit Auckland. Firstly, the CRL will function as the centrepiece of a broader transformation of Auckland's public transport network. Furthermore, the ACAP states that Auckland's city centre generates 21% of Auckland's GDP and hosts the highest concentration of workforce and employment in the country; consequently, the CRL is projected to double the number of people able to reach the city by public transport (Auckland Council, 2026). When the CRL opens, Karanga-a-Hape and Te Waihorotiu Stations will be within a 12-minute walk of 21,000 more current residents, 17,200 more current students, and 37,000 existing workplaces.
Additionally, an estimated 75% of Karanga-a-Hape passengers are expected to transfer between trains and buses during peak hours, and journeys such as Henderson to midtown will save 24 minutes (Auckland Council, 2026). As Waitematā Station becomes a connecting station, there will be a considerable increase in the number of trains serving the city and the south and west of Auckland. In addition, these benefits are not limited to areas with a local train station: those living on the North Shore and in the eastern suburbs are also expected to benefit from more frequent bus connections as part of the upgraded network (Auckland Council, 2026).
Andy Baker, an Auckland councillor, expressed, "When the new stations open, I think Aucklanders will be proud of what they see. We have built stunning long-term assets for the city" (OurAuckland, 2026). Similarly, Auckland Council's Priority Location Director, Simon Oddie, described the CRL as a "city-shaping investment, our new station neighbourhoods have created places that connect people seamlessly to jobs, learning, culture and daily life, while supporting a more walkable, resilient and low-carbon city centre"(OurAuckland, 2026).
Looking Forward
Once the rail project is completed, it will cost the council $235 million each year for the CRL to run, including, but not limited to, $26 million for Auckland Transport to run extra train services and stations, $167 million in interest on borrowing, and $42 million in depreciation costs to replace assets over time, like trains and stations (Auckland Council, 2026). Whether this ongoing cost is judged reasonable will depend on how CRL's long-term benefits are weighed against its price, a question that can only be answered as Aucklanders begin using the network day-to-day.
Key Takeaways
The CRL opens on the13 September 2026, doubling Auckland's public transport capacity and connecting the city's rail network for the first time
Total costs rose from an original 2015 estimate of $2–3 billion to a final cost of $5.493 billion, driven by both various scope decisions and Covid-19 disruption
Critics, including CRL's own former CEO, argue the project was over-specified and could have cost significantly less
Supporters argue the project's benefits are long-term and city-shaping, extending well beyond a narrow cost-benefit calculation
References
Auckland Council. (2016, September 14). Historic agreement on CRL funding. Our Auckland. https://ourauckland.aucklandcouncil.govt.nz/news/2016/09/historic-agreement-on-crl-funding
Auckland Council. (2026). City Rail Link (CRL) — Annual Plan 2026/2027. AK Have Your Say. https://akhaveyoursay.aucklandcouncil.govt.nz/annual-plan-2026-2027/city-rail-link-crl
Auckland Transport. (2026, August 6). All aboard! What you need to know about City Rail Link opening 13 September. https://at.govt.nz/about-us/news-events/media-centre/2026-media-releases/all-aboard-what-you-need-to-know-about-city-rail-link-opening-13-september
Bevin, A. (2023, May 18). Council to cough up share of $1b CRL blow-out. Newsroom. https://www.newsroom.co.nz/council-to-cough-up-share-of-1b-crl-blowout
City Rail Link Ltd. (n.d.-a). Governance. https://www.cityraillink.co.nz/crl-ltd-governance
City Rail Link Ltd. (n.d.-b). Project overview. https://www.cityraillink.co.nz/city-rail-link-project-overview
McGregor, C. (2023, March 17). City Rail Link blowout widens Auckland Council's budget black hole. The Spinoff. https://thespinoff.co.nz/the-bulletin/17-03-2023/city-rail-link-blowout-widens-auckland-councils-budget-black-hole
1News. (2026, August 6). Official City Rail Link opening date: All you need to know. https://www.1news.co.nz/2026/08/06/official-city-rail-link-opening-date-all-you-need-to-know/
NZ Herald. (2026, May 9). City Rail Link blowout: Country's largest infrastructure project could have been "half the price" [Video]. YouTube. https://youtu.be/OOEYKF6z6BA
Office of the Auditor-General. (2022). Governance of the City Rail Link project (B.29[22d]). https://oag.parliament.nz/2022/city-rail-link/overview.htm
OurAuckland. (2026, March 31). Fuel disruption brings City Rail Link benefits into sharper focus. Auckland Council. https://ourauckland.aucklandcouncil.govt.nz/news/2026/03/fuel-disruption-brings-city-rail-link-benefits-into-sharper-focus/
RNZ. (2023, March 16). Auckland mayor Wayne Brown warns of council job cuts, details cutting services covering CRL blowout. https://www.rnz.co.nz/news/regions/486072/auckland-mayor-wayne-brown-warns-of-council-job-cuts-details-cutting-services-covering-crl-blowout
Rose, J. (2023, March 22). The City Rail Link: A great big sucking sound for taxpayer and Auckland ratepayer dollars [Briefing paper]. New Zealand Taxpayers' Union. https://assets.nationbuilder.com/taxpayers/pages/204/attachments/original/1679446675/Briefing_Paper_-_Cicy_Rail_Link.pdf
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