If you’re asking this question, you’re already closer than you think. Most writers don’t need an editor because they’re “bad”; they need an editor because a book is a big, complex object—and it’s hard to see your own work clearly from the inside.
“Editor” can mean different things. Broadly:
Developmental editing helps with structure, argument, chapter order, and clarity of ideas
Line editing improves readability, flow, tone, and sentence-level clarity
Copyediting checks correctness and consistency
Proofreading catches final errors after layout/formatting
If you’re not sure which one you need, don’t worry; you can work it out by looking at what’s currently hurting most.
You’ll benefit from an editor if:
You can’t tell what to fix next, so you keep “tweaking” forever
You’re too close to the manuscript to judge it clearly
The structure feels wobbly (chapters overlap, the middle drifts, the ending doesn’t land)
You’re worried the book isn’t delivering what it promises
You want the book to be publish-ready, not just “good enough”
You may not be ready for an editor just yet if:
You’re still writing new chapters or rewriting major sections weekly
You haven’t read the manuscript start to finish
You’re not sure what the book is really about yet (the “promise” keeps changing)
You haven’t done a first self-edit pass to fix obvious issues
In that case, do a calm self-edit first; you’ll save time and money later.
A simple way to decide what you need
Ask yourself these three questions:
Is the structure solid?
If you’re unsure, start with developmental work (even a light review).
Does it read smoothly?
If the ideas are good but the writing feels clunky or unclear, line editing helps.
Is it consistent and correct?
If it’s nearly finished and you want it clean and professional, copyediting comes next—then proofreading last.
You’re in a great position to hire an editor when:
you’ve completed a full draft
you’ve done at least one self-edit pass
big structural changes are unlikely
you can explain what kind of help you want
If you want a calm, step-by-step method to prepare your manuscript (and work out exactly what kind of editing you need), Course 1: Editing Foundations will guide you through it.