How long does it take for a codex to come out?

3 to 4 years. Am I in the minority who wishes it was every 5 years so all the Codex's could come out after 3 years and then you have a while to have everyone play on the same "level"? It really shows just how many new people we have in the hobby.

When will Warhammer 40k 10th edition codex release?

Games Workshop confirmed several Warhammer 40k 10th edition Codex release windows during Warhammer Fest 2023, but not specific dates. Codex Space Marines and Codex Tyranids will release in Fall 2023, with Codex Tyranids coming first.

When does Codex Chaos Daemons come out?

Games Workshop released Codex: Chaos Daemons on September 3, 2022, having teased new daemonic saves and a bunch of miscellaneous rules for the faction in the run up to the release.

When will Codex Space Marines & Codex Tyranids release?

Codex Space Marines and Codex Tyranids will release in Fall 2023, with Codex Tyranids coming first. Codex Necrons and Codex Adeptus Mechanicus will follow during Winter 2023, and during Spring 2024 we’ll get Codex Dark Angels, Codex Orks, Codex Adeptus Custodes, and Codex T’au Empire.