On 29 July 2021, it was announced that Kuipers would be retiring from refereeing. His final game was on 7 August 2021 where he refereed the Johan Cruijff Schaal, the Dutch Super Cup game between Ajax and PSV. Kuipers still had doubts about retiring after refereeing the UEFA Euro 2020 Final. But after time away on vacation he said in a interview with KNVB; “I realised I’ve been everywhere and experienced everything. I will not get more beautiful. There’s no better moment to stop”.