Does a natural 20 automatically succeed on a concentration check?


Rules Questions

Shadow Lodge

Pathfinder Adventure Path, Lost Omens Subscriber

As far as I can tell, it does not. It came up in a game last night where a grappled caster needed to cast a spell with a concentration check DC of 54, and actually did manage a natural 20 - but as we looked, we couldn't find anything that said natural 20s counted as an automatic success on such checks.

Anything I missed in my search?


Natural 20s only auto-succeed on attack rolls and saving throws. The same with natural 1s.

Grand Lodge

As Jeraa pointed out, as written no. But that would definitely be a check I'd allow to succeed on a nat 20.


There are some other places where natural 1s are automatic failures (Wisdom check to avoid Scroll Mishap, for example).

But concentration checks don't automatically succeed, so squishies should try to avoid being grappled :)


I was in that games still kinda crazy that it couldn't get out.

Grand Lodge

Pathfinder PF Special Edition, Starfinder Roleplaying Game Subscriber
Cheapy wrote:

There are some other places where natural 1s are automatic failures (Wisdom check to avoid Scroll Mishap, for example).

But concentration checks don't automatically succeed, so squishies should try to avoid being grappled :)

In the latter stages of my career, my Summoner was being grappled so much it wasn't funny.

Boots of Escape.... my best investment ever


Also what a ring of freedom of movement is for!

Grand Lodge

A wand of grease, at lower levels.

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