Hey everyone. I'm designing a new subclass, and I'm wondering if there is any official word from the designers, on how much power a subclass is supposed to add to the base class. And if there is no word from the designers, then I would still very much appreciate any comments about commonly accepted wisdom among experienced homebrewers :-)

EDIT - Thanks everyone for your replies, this helps a lot :-)

It generally depends on the class that the subclass is for. Like warlock gets a lot from it’s subclass although fighters get much less because it has stronger base abilities.

Exactly. It’s why Sorcerers need more from their subclasses and Wizards don’t.

It really depends on the class, like others have said. For example, Rogues usually get one defining combat feature at level 3, but besides that they have a large focus on utility and out-of-combat abilities.
I found a good source that I use when making homebrew. (Not sure what the rules are regarding links to outside social media, so not linking it.) I just search “Dnd Subclass Homebrew Guide” (Quotes included) to get to it.

I just look at other subclasses from the same class, and try to compare damage and utility.

Thanks everyone for your replies, this helps a lot :-)