3.5e Ability score progression

[Ninth Nova]

I'm not new to D&D, but I forget if you do this in 3.5e:
Is there a level where you get to add +1 to any of your ability scores?

[Eldariel]

I'm not new to D&D, but I forget if you do this in 3.5e:
Is there a level where you get to add +1 to any of your ability scores?

4, 8, 12, 16, 20.

[Claudius Maximus]

Eldariel's right. It goes on infinitely if you're using epic rules, too. One point per 4 levels.

To clarify, you choose one score each time you get a point, and increase it by 1. You don't boost all of them every time. (I've seen this mistake is all, so I'm just saying).