The promoted teams were 2023–24 Cymru North runners-up Flint Town United (after champions Holywell Town failed to secure a Tier 1 licence), and 2023–24 Cymru South champions Briton Ferry Llansawel.
[3][4] Flint Town United returned to the top-flight after a single-season absence, while Briton Ferry Llansawel marked their debut (not including former guise Briton Ferry Athletic).
Teams placed 2nd–7th enter one-off play-off matches for the second spot in the Conference League first qualifying round.
If the 2024–25 Welsh Cup winners finish in the top two, the 2nd-placed team qualify automatically for the Conference League and the spot will be vacated.
If the Welsh Cup winners finish in 3rd to 7th place, that spot will be vacated; the 2nd/3rd-placed team will receive a bye to the play-off final.