The basic formula in D&D Next for Spell Save DC is 8 + Magic Modifier + Proficiency.
However, the Spell Casting feature Paladins gain at level 2 says:
Charisma is your magic ability for your paladin spells. The DC to resist one of your spells equals 8 + your Charisma modifier.
Do I get to add my proficiency bonus to this (like everything else)?
As of Oct, 2013
Classes PDF page 42: