In the construction phase, lump sum payments were made upon the completion of pre-defined construction milestones. Not achieving these milestones in the time specified and to the required quality was subject to deductions of up to €12 million (10% of the total subsidy payable by the Procuring Authority). This incentivised the Project Company to complete the milestones on time.

In the operations phase, the Project Company has three sources of revenue. The first is an availability payment (PPD) to the Project Company for the quality and availability of the trams' service. This payment depends on fulfilment of the KPIs described above under the heading "KPIs and Performance Monitoring".

The second source of income is a Payment Per User (PPU). This source has two parts; the first PPU income is received from the users as direct fares, and there is a second part that comes as a shadow payment, as the Procuring Authority pays an agreed amount for each user. The third, and final, source of revenue available to the Project Company is park and ride fares and advertising. This final source represents a small proportion of the total revenue sources.

The demand risk is shared between the Procuring Authority and the Project Company. The parties agreed a specific baseline level, and if the actual project revenue from user fees is more than 10% below the baseline level, the losses are shared 50-50 between the parties with no limit. If the revenue from user fees is over 20% above the baseline level, the Project Company retains 10% of the gains and the Procuring Authority the remainder (i.e. 90%).

For indicative purposes, the total of current income and revenue of the Project Company consists of 15% from quality and availability payments, 84% from payment per user revenue and 1% from park and ride fares. The stakeholders interviewed expect that these percentages will change in the future, when the tram will have a higher number of users, changing the percentages to 10%, 89% and 1% respectively.

In addition, the Project Company is required by the PPP contract to create a reserve account prior to starting the 10th year before handback. Then, every year until handback, starting with the 10th year before the handback and including the year of the handback, the Project Company must deposit in this reserve account 5% of the availability payments that the Project Company receives from the Procuring Authority. Any rolling stock improvements are expected to be covered by the reserve account.