[RPG] Do I add the Proficiency Bonus to the Spell Save DC of a Tiefling’s Hellish Rebuke

dnd-5espellstiefling

The Infernal Legacy racial trait grants a Tiefling the ability to cast Hellish Rebuke as a 2nd level spell and the Handbook says that you use Charisma for the spellcasting ability of these spells. So if my Ranger Tiefling has a Charisma score of 14, would the Spell Save DC for Hellish Rebuke's damage be 10 (8+Charisma Mod of 2) or would I add the proficiency bonus to it as well?

Best Answer

The Spell save DC would include the proficiency bonus.

Player Handbook (p.205)

The DC to resist one of your spells equals 8 + your spellcasting ability modifier + your proficiency bonus + any special modifiers

A special modifier would be a bonus from a magic item for example.