Belgian football's amateur tiers reflect Belgian politics. Leagues A and B were licensed by the Voetbalfederatie Vlaanderen (VFV), the Dutch-speaking wing of the football association. League C was licensed by the Association des Clubs Francophones de Football (ACFF), the French-speaking wing. Each operated its own playoff system. Each crowned its own champion. RWDM47 - a Brussels club carrying the spiritual heritage of the dissolved Racing White Daring Molenbeek - won the ACFF league outright. The two Flemish leagues sent up Rupel Boom and Tessenderlo. RFC Liege finished second in the ACFF league, and second place in this system meant playoffs.

Belgian amateur football has a quirk that turns playoffs into farce: clubs have to actually apply for promotion licenses, and many do not, because the financial requirements of the higher tier are punishing. In the Flemish Division A, only two of the eight eligible clubs - Mandel United and Sint-Eloois-Winkel - submitted licenses. In Division B, only Hasselt applied, even though they had finished a mere five points clear of relegation. Three of the four ACFF playoff slots were filled. The fourth went vacant. Half the bracket was empty before a ball was kicked. Sint-Eloois-Winkel got a bye straight to the final. La Louviere-Centre, the ACFF runner-up, got a bye to round two. RFC Liege had to play through.

RFC Liege beat La Louviere-Centre in the ACFF playoff round, then took down Mandel United over two legs - winning 2-0 away at the Flemish club's ground in Ingelmunster, and 1-0 at home - to reach the four-team Promotion Final. The other three places went to Sint-Eloois-Winkel, Mandel United (eliminated), and Hamme, the 14th-place finisher from the tier above, fighting to stay there. After the first round of the final tournament, Mandel United and Sint-Eloois-Winkel were out. RFC Liege and Hamme moved on. In Final Round 2, played over two legs, RFC Liege won 6-3 on aggregate. The club - the club founded in 1892, the five-time pre-war champion - was promoted to the 2018-19 Belgian First Amateur Division. Hamme, by losing, was relegated from the tier above and joined the Second Amateur Division they had just escaped from.

The lower tiers of Belgian football are restless places. Two new clubs were born going into the season: KFC Mandel United, the merger of Izegem and the freshly promoted Ingelmunster, and SK Pepingen-Halle, the marriage of newly promoted Pepingen and freshly relegated Halle. At the other end of the table, relegation depended on the wider chaos above. Three teams from the third tier above were all VFV clubs - Hamme, Berchem Sport, Patro Eisden Maasmechelen - and then Lierse, a storied club playing in the second tier, went bankrupt. All VFV clubs, all suddenly relegated. The cascade pushed Zwarte Leeuw and Pepingen-Halle out of the Second Amateur Division. On the ACFF side, Ciney had been waiting nervously to see if they would need to drop. They were spared. The season ended, the table reset, and Belgian football began another year of leagues split by language, clubs split by license, and a handful of historic names trying to claw back to where they once stood.