The administrative council of the region Ile de France (Paris area) voted today to confirm new, higher metro/RER ticket prices that will take effect as of January 1, 2023.
You can see a chart in Le Parisien of the old and new prices at this link (scroll down the story to get to the chart):
https://www.leparisien.fr/info-paris-ile-de-france-oise/transports/le-passe-navigo-mensuel-contenu-a-8410-euros-une-reponse-ponctuelle-et-partielle-selon-valerie-pecresse-06-12-2022-5NZV5LMNXVEJVI4XNTHC6X7E74.php
The highest increase is for the weekly Navigo pass - its price will increase 31.6%. Single tickets will go up 10.5%, and a carnet loaded onto a Navigo Easy card will go up 13.4%. Prices for Roissybus, Orlybus, and Orlyval will go up 18%. (My monthly card will increase in cost by 11.8%.)
Here are some of the key changes:
Regular ticket: old price 1.90€, new price €2.10
Carnet purchased/loaded on a Navigo Easy: old price €16.90, new price €19.10
Weekly passe Navigo : old price €22.80, new price €30
I haven't seen any indication that the cost of the Navigo Easy card itself (2€) or the Navigo card for the decouverte passes (€5) will go up, but will add that if I see it.