Spell Save DC Calculation Question


Skills, Feats, Equipment & Spells


So, maybe I missed the answer to this question somewhere, as I'm finding the rule book difficult to navigate, but after spending entirely too much time flipping through the book and not finding the answer even after doing a forum search, I still can't figure out how to specifically calculate spell save DCs.

I assume it's like AC, thus a base of 10 + ability mod + proficiency, but it's not actually spelled out anywhere that I can find. In the character class descriptions, it refers me to page 291 for the rules on calculating DCs. And indeed on that page it mentions that I could add my proficiency to spell save DCs, but it doesn't tell me the base of that save. A little later on in that chapter, it talks about AC and TAC and refers back to page 16, which is where it is mentioned the base for AC is 10, but nothing is ever said about spell save DCs. Nothing I can find in the spell chapter was any help. Even the character sheet, which helpfully indicates a base of 10 for class DC and AC, is completely silent on the spell DC section of what the base should be.

I apologize if they're someplace obvious in the book and I just can't find them, but any help someone could give me to directing me to the page with the rule on it would be most appreciated.


I believe it states to use the class's key ability score.


SqueezeBox wrote:
I believe it states to use the class's key ability score.

Meaning, if I have a wizard with an 18 IQ, my spell save DC at level 1 is 19? Can you point me to the page where is says that? I can't find it anywhere, and that seems both a little high and out of synch with how other static DCs are calculated.


I maybe found something. Page 8 of the playtest rulebook says, "The DC for any statistic is 10 plus all the same modifies you'd add to a d20 roll using that statistic." That would jive with my previous thought that is likely 10 + ability mod + proficiency mod.

However, if that's the case, it's completely unclear from the way that sentence is phrased, the lack of cross-referencing makes that impossible to figure out, since no reference to spell save DC ever refers back to this page. My suggestion to the writers would be to provide some text explicitly explaining how to calculate spell save DC, the same as they do for AC and TAC.


It's on the character sheet as calculated from Ability and proficiency, but you still have to know to add 10


In the glossary (appendix 2) under Spell DC -see Spell roll.


Chief Cook and Bottlewasher wrote:
In the glossary (appendix 2) under Spell DC -see Spell roll.

Ah, thank you! I’m glad it’s in there somewhere. Hopefully it will be more clear in the final book. The glossary to me should be more of a reference than the main explanation of a rule.

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