It is the first Professional football tournament in Singapore where players work under a full-time contract.

The SFL Qualification tournament, Singapore Island Wide League or the IWL is the next tier for newly registered Football Association of Singapore clubs compete against each other to gain promotion to the SFL.

In 2018, the Prime League was dissolved, making the then called NFL the next tier followed by the IWL.

These leagues consists of mainly expat players in Singapore and teams from the Cosmoleague and EFL are known to have beaten the SFL and IWL clubs in pre-season friendlies.

[3] Nevertheless the level of play of Cosmoleague and EFL are similar to the playing level of SFL and IWL, thus making these leagues to fall from Tier 2 to Tier 4 of the overall football league system in Singapore.

Geylang United won the first ever S.League title upon defeating the SAFFC in a stadium filled up 30,000 crowd which remains a record breaking number of attendance to this day.

During the phase 3 of the reopening process, a group of 8 people is allowed in each respective social gathering.

The FAS is also planning to organise a tournament for the affiliated clubs' players and coaches to participate in a 4v4 Singapore Football League whereby there will be no price money given to the winners of the respective tournament whereby there used to be price money winners in the past prior to the pandemic.

However ESPZEN, a football organisation associated with Football Association of Singapore have organised a well structured 7-a-side midweek league that currently consists of 2 divisions and will be expanded to 3 divisions the next season after the COVID-19 cases.

[clarification needed] Many top 7-a-side players have taken part in the tournament and one of the well known player was Nagarajan suppiah of Senkang Rangers who played for Singapore national minifootball team in 2019 WMF World Cup.