Arthur D. Little Warns European Public Transport Faces 36% Rise in Funding Needs

European public transport systems could require a 36% increase in annual spending to meet future mobility, infrastructure and climate resilience requirements, according to a report by global management consultancy Arthur D. Little. Published in October 2026, Funding Storm Ahead examines how aging infrastructure, climate adaptation, fleet electrification and efforts to reduce dependence on private vehicles are increasing financial pressure on public transport authorities and operators.

The report estimates that public transport spending across Europe, excluding Russia and Türkiye, currently totals about €130 billion annually, including €96 billion in operating expenditure. Its projections draw on a representative urban transport model developed using data from Paris, London, Amsterdam, Berlin and New York, alongside industry research and interviews with transport executives and policymakers.

 

Public Transport Spending Could Rise 36% as Funding Pressures Grow

 

Arthur D. Little estimates that meeting future transport requirements could increase annual operating expenditure by 13% and capital expenditure by 56%, for an overall spending increase of about 36%, equivalent to €153 per person annually in its model. The additional investment would support infrastructure maintenance, climate adaptation, cleaner vehicle fleets and expanded transport services.

Current financing arrangements remain heavily dependent on passenger fares and public funding. Fare revenues cover about 44% of operating costs and 27% of total public transport expenditure, while government subsidies, taxes, and public compensation cover the remainder. Non-fare income from activities such as advertising, retail and property development typically contributes less than 5% of transport budgets, limiting the ability of existing revenue streams to absorb substantial additional spending.

 

Read more: Deutsche Bank Reports Record €32 Billion in Q3 Sustainable and Transition Finance

 

Network Expansion and Climate Adaptation Dominate Investment Requirements

 

The report identifies public transport network expansion and improved service coverage as the largest investment requirement, accounting for approximately 60% of additional spending through 2050. Climate adaptation and resilience represent another 32%, while addressing deferred infrastructure maintenance accounts for 6%. Fleet electrification and decarbonization account for the remaining 2% of additional expenditure in the model.

Arthur D. Little distinguishes between investments needed to expand services and those required to maintain existing infrastructure. While approximately 60% of additional spending relates to network and service expansion, the remaining 40% addresses requirements that transport authorities may struggle to defer without compromising reliability, safety or existing service standards. The report also highlights that private cars still account for about 70% of urban passenger kilometers globally, despite growth in public, shared and active mobility.

 

Climate Resilience Creates Major Costs for Rail and Metro Systems

 

Climate change is increasing infrastructure costs as transport networks face greater exposure to flooding, extreme heat, storms and other physical risks. Arthur D. Little estimates that its representative metropolitan transport system would require approximately €15 billion in additional resilience investment by 2050, equivalent to around €574 million annually. Rail and metro infrastructure is expected to account for more than 80% of this expenditure, reflecting the costs of protecting and modernizing existing networks.

Recommended measures include improving drainage systems, protecting underground stations from flooding, strengthening bridges and tracks, upgrading cooling equipment and adjusting maintenance practices. The report also identifies substantial deferred maintenance requirements, estimating infrastructure backlogs averaging approximately €2 million per kilometer for existing metro networks and €4 million per kilometer for railway infrastructure. Addressing these problems early could help prevent higher repair costs and operational disruption.

 

Explore OneStop ESG Marketplace: EV & clean mobility

 

Fleet Electrification Requires Upfront Capital and Infrastructure Investment

 

Although fleet decarbonization represents a relatively small share of the model's additional spending requirements, the transition to electric and other zero-emission vehicles will require substantial changes to procurement and infrastructure. The report estimates that a standard electric bus can cost between 1.2 and 1.8 times as much as a comparable diesel bus, although lower energy and maintenance costs may improve its total cost of ownership over time.

Transport authorities will also need to invest in charging systems, grid connections, depot upgrades and workforce training. Arthur D. Little estimates that adapting a bus depot can cost approximately €40 million, depending on location and technical requirements. The report highlights green bonds, vehicle leasing, and energy-as-a-service arrangements as potential financing options, noting that electric fleet deployment shifts the balance between upfront capital expenditure and operating costs.

 

New Funding Models and Efficiency Measures Could Help Close the Gap

 

Arthur D. Little recommends combining additional revenue generation with operational improvements rather than relying on a single financing mechanism. Potential measures include revising fare structures, expanding commuter subscriptions, introducing visitor-related charges and increasing revenues from advertising, retail and property development. The report also examines green bonds as a way to diversify funding sources, while cautioning that lower borrowing costs from issuing green debt are not guaranteed.

On operational efficiency, the consultancy estimates that transport authorities and operators could improve cost per passenger-kilometer by 20% to 40% through strategic network redesign, higher vehicle utilization, better scheduling, shared procurement, and improved productivity. Such improvements could help contain costs while maintaining service quality, but they would not eliminate the need for additional investment. The report concludes that sustainable public transport funding will require coordinated financial planning, infrastructure investment and governance reforms, with environmental benefits increasingly incorporated into transport investment decisions.

 

Source: Arthur D. Little