Announced, but not yet voted on, it's now a done deal: the single €2.50 fare for Paris and the entire Ile-de-France region will come into effect on January 1ᵉʳ, 2025. Île-de-France Mobilités is introducing a single transport fare of €2.50 for metro, RER and train journeys throughout the Paris region. The aim of this reform is to simplify fares for the 4 million occasional users, making the network easier to understand. Good news for some, bad news for others, we tell you all about it.