If I were to renew a player's contract the first season would be the few weeks that we have left. So my question is when do I renew a player's contract so it will take effect next season if the schedule looked like this?:
05/18 2025 League Championship Game
05/19 2025 End of Season
05/20 2026 Early Free Agency Week 1

5/18 or 5/19?

Thanks for the help in advance!

Usually when i renew a players contract i do it on the League Championship Midweek.

you can renew them during the regular season or during the playoffs

MAKE SURE TO DO it BEFORE Free Agency Week 1 of 5 or you could lose a player to someone else.

When you sign a player to a contract it always takes effect during the current season. How much of an impact that has on your cap depends on when during the season they are signed.

There are no "extensions" in MFN currently.