The National MIXED Indoor Championship 2023-2024 will be played in two phases. Phase one will consist of three qualifying days which will be played on a Sunday, The qualifiers days are 5th November, 3th December, 11th February. The second phase will be finals day (3th March ).  Every qualifier day teams get points depending on the result and ranking of that day. The top 8 teams ranked after the three qualifier days will  play the finals day. All other teams will know their final ranking after these three days. The winner of the final day is crowned Belgian Ultimate Indoor Mixed Champion 2023-2024.

This National Championship is the Belgian qualifier for the EUICC Mixed if this will be held in 2025. Belgium has presumably 1 spot and there might be a possibility for a second spot.