Spell Advancement with multiple arcane classes

[SamuraiZero]

I don't play Casters often, but when building a particular archetype I randomly got curious, and a little confused on how Arcane casting works when you dabble in multiple arcane classes.

For example: Lets say I'm a level 5 wizard with access up to 3rd level spells, but then I decide to take 5 levels in Sorcerer. How would that work? Would the spells continue to advance giving me roughly 7th level, or would you only be advancing your spell level in Sorcerer spell slots (and as such have to start all over again from scratch) allowing you to prepare a certain number of wizard slots, but then allowing yourself the ability to spontaneously cast a different array of spells at will?

[TheTheos]

You would have to start over from scratch. Caster levels do not stack.

[Sangalor]

They are seperate classes and are counted seperately - you would be a sorcerer 5 and a wizard 5, with seperate spells known, spells per day, caster levels etc.

Your saves, hitpoints, base attack bonuses and so on would stack, though.

[SamuraiZero]

This answers my question, thank you