Regular users of the RER B, C, and D who were victims of repeated delays last year can finally breathe easy. The annual compensation campaign launched by Île-de-France Mobilités opens this Wednesday, March 11. Subscribers with a Navigo pass will have until April 7 to submit their request online through the dedicated platform.
Established since 2021 by the organizing authority for transport in the Île-de-France region, this system is based on a simple criterion: the punctuality of the lines. If a line falls below 80% of trains on time for at least three months within the year, its users can qualify for a partial reimbursement of their subscription.
It looks like your message got cut off! Please provide the text you'd like me to translate into English, and I'll be happy to help you with it.🚊🚆 Cette campagne de remboursement concerne les voyageurs sur cinq axes des #RER B, C et D.
— IDF Mobilités (@IDFmobilites) March 6, 2026
Les usagers éligibles sont ceux qui disposent de forfaits #Navigo Annuel, Senior, imagine R Étudiant et Scolaire, Navigo Mois (y compris sur passe Découverte et sur Smartphone) et le… pic.twitter.com/FRBde3ZuUN
Fewer lines affected in 2025
Good news for travelers: the network's reliability has improved. In 2023, fifteen lines (RER, Transilien, or tramway) had crossed the critical threshold. This dropped to only six in 2024, and just two in 2025. The most affected branches remain the Aulnay-sous-Bois/Mitry-Claye line of the RER B, which stayed below 80% punctuality for five months, and the Dourdan/La Norville branch of the RER C, which fell below that threshold for four months.
🚊🚆 Cette campagne de remboursement concerne les usagers de cinq axes des #RER B, C et D.
— IDF Mobilités (@IDFmobilites) February 4, 2026
Les usagers éligibles sont ceux qui disposent de forfaits #Navigo Annuel, Senior, imagine R Étudiant et Scolaire, Navigo Mois (y compris sur passe Découverte et sur Smartphone) et le… pic.twitter.com/WzzMSQPb9o
To expand compensation, Île-de-France Mobilités has also included several branches close to this threshold, particularly on the RER D. Affected subscribers can receive the equivalent of half a month’s Navigo pass, which is €44.40 for a full-price subscription.
le RER D est la pire ligne de train de l’histoire je suis très sérieuse
— ⋆⭒˚.⋆ (@neptunthv) February 24, 2026
Beware of fake emails and scams
To be eligible, you must prove regular use of the line, with a home or work address located in a municipality served by the relevant branch. Please note that the request should be made only on the official Île-de-France Mobilités website.
Every year, the campaign also attracts its fair share of scams: Navigo subscribers receive fake emails featuring the Île-de-France Mobilités logo, or come across fraudulent web pages asking them to provide their banking details. These phishing attempts, which happen quite regularly, mainly aim to steal personal or financial information from users.
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The reason the regional authority insists is: no refunds will be granted via email or third-party websites. This shows how important it is to check the URL and to never click on suspicious links received through email or SMS.