Harms brought about through negligence are typically morally blameworthy despite being unintended and often unforeseen. How is this best understood? A natural approach parallels a common approach to blameworthiness for unwitting wrongdoing, i.e., acts performed in ignorance of their wrongness: blameworthiness for the act or harm in question is taken to be derivative from more straightforward blameworthiness for relevant earlier failures. I have argued elsewhere for a derivative blameworthiness approach to unwitting wrongdoing that appeals to reasonable expectations about available steps the agent could have taken to avoid or remedy the ignorance in question; and contra Gideon Rosen and Neil Levy, such claims about reasonable expectations do not depend on there being episodes of clear-eyed akrasia in the agent’s past management of her beliefs, so that the account allows for blame in a much wider range of cases. My aim here is to extend this approach to a variety of forms of negligence, defending a similarly broad reasonable expectations version of a derivative blameworthiness view. In particular, I will distinguish and explore cases involving (i) self-conscious negligence, (ii) negligence involving false beliefs about relevant norms of due care, (iii) thoughtless negligence, and (iv) harms due to pure forgetting – though I will argue that the latter often turn out not to be cases of negligence at all, at least for purposes of moral blame.