Larne are Irish League champions for the first time in their 134 year history, following a 2–0 win over Crusaders in April 2023.

Each applicant club was assessed by an independent panel and awarded points against the following criteria: Portadown were the highest-profile casualty of the new system, suffering relegation to the newly formed IFA Championship as a result of submitting their application for inclusion in the Premiership 29 minutes past the deadline for consideration.

The Irish League campaign begins in August and continues until late April or early May.

In the highly unlikely event that teams are still tied in a key position after these tiebreakers (e.g. determining the league champions, European qualification, relegation, or even second stage group allocation), lots will be drawn by the Management Committee.

In the event that the Championship winners do not possess the Promotion licence required to be eligible for the top flight, there is no automatic relegation.

No Premiership club has ever reached the group stage of a UEFA competition in their current respective formats.

The closest any club has come to reaching the group stage was first during the 2019–20 UEFA Europa League, when Linfield became the first club from Northern Ireland to reach the play-off round, narrowly missing out on a place in the group stage after a 4–4 draw on aggregate against Qarabağ FK from Azerbaijan resulted in elimination on the away goals rule.

Then, in the 2022–23 UEFA Europa Conference League play-off round, Linfield were beaten on penalties by FK RFS after a 3–3 draw on aggregate.

This would require an additional quarter-final match to be played by the sixth and seventh-placed teams, with the winner joining the other three clubs in the semi-finals.

The play-offs returned in the 2020–21 season, after the league's ranking improved to 48th place - earning the fourth European berth back again.

The play-offs are single knockout matches and are played at the home of the higher-ranked team, with extra time used to determine the winner if the match ends level after 90 minutes, and a penalty shootout to follow if the two teams are still level after 120 minutes.