On 15 June 2020, she signed for Paris Saint-Germain on a three year deal. Simon made her debut with PSG on 25 September 2020 against her former club Stade de Reims. She played her first Champions League match with of her career in a Round of 16 tie against Górnik Łęczna. PSG won the first Division 1 Féminine title of their history that season, but Simon only played 280 minutes across all competitions.
