Late payment remains due

Sadaqat al-Fitr: Liability, Amounts, and Timing

وإن أخروها عن يوم الفطر لم تسقط وكان عليهم إخراجها
Translation: If they delay it until after Eid, the obligation does not fall away; they still must pay it.

“It does not lapse” means the obligation remains outstanding after Eid. Passing the recommended day does not cancel what is owed.

Earlier payment was preferable, but a person who delayed must still fulfil the remaining liability to an eligible recipient.