Do You Need a Professional Editor? The Types of Editing Explained
There are three main types of editing, and they happen in order. Developmental editing looks at the big picture — structure, plot, pacing, argument — and comes first. Copyediting (line editing) fixes the writing at the sentence level: grammar, clarity, consistency and flow. Proofreading is the final polish, catching typos and formatting slips just before publishing. Most books benefit from at least a copyedit and a proofread; a first novel or a complex non-fiction book often needs developmental editing too. Editing and formatting are different jobs — editing fixes the words, formatting arranges them into a book. Here's what each type does and which your book needs.
“Editing” isn't one thing — it's three different jobs, done in a specific order, and knowing which is which saves you money and disappointment. Paying for a proofread when your plot has holes fixes nothing; a developmental edit won't catch your typos. Here's how the types differ and how to tell what your manuscript actually needs.
The three types of editing, in order
| Type | What it fixes | When |
|---|---|---|
| Developmental (structural) | Big picture: structure, plot, pacing, characters, argument | First — on an early draft |
| Copyediting / line editing | Sentence level: grammar, clarity, consistency, flow | After the structure is solid |
| Proofreading | Final polish: typos, punctuation, formatting slips | Last — before publishing |
They run big-to-small: fix the shape of the book first, then the sentences, then the surface. Doing them out of order wastes work — there's no point polishing a chapter you might cut.
Developmental editing: the big picture
A developmental (or structural) edit looks at your book as a whole. For fiction: does the plot hold together, is the pacing right, are the characters consistent, does the structure work? For non-fiction: is the argument clear, is the material in the best order, does each chapter earn its place? It's the deepest, most transformative edit — and the one to do first, on an early draft, before you polish anything. First novels and complex non-fiction benefit from it most.
Copyediting and line editing: the sentences
Once the structure is sound, copyediting works line by line: grammar, punctuation, word choice, clarity, consistency (spelling, capitalization, character details), and flow. “Line editing” sometimes refers to a heavier focus on style and rhythm, while “copyediting” leans toward correctness and consistency — many editors combine the two. This is the pass that makes your prose read cleanly and professionally. Almost every book needs it.
Proofreading: the final polish
Proofreading is the last check before publishing — catching the typos, doubled words, stray punctuation and small formatting slips that survive earlier passes. It happens after editing and often after formatting, on the final version, because new errors can creep in during layout. It's light-touch by design: a proofreader corrects, they don't rewrite.
Do you need all three?
- Every book: at minimum a copyedit and a proofread. Publishing without them is the fastest way to look amateur.
- First-time novelists: strongly consider developmental editing — it's where a promising draft becomes a solid book.
- Complex non-fiction: developmental editing helps organize material and sharpen the argument.
- Experienced authors with a clean draft: may skip developmental and go straight to copyedit + proofread.
If budget is tight, prioritize a copyedit and proofread over everything else — those two are what separate a professional-looking book from an obviously self-edited one.
Editing is not formatting
A common beginner mix-up: editing and formatting are different jobs. Editing fixes the words — the writing itself. Formatting (typesetting) arranges the finished words into a professional book: margins, fonts, chapter openings, a working table of contents, print and ebook files. You edit first, then format. Confusing the two leads authors to expect a formatter to fix grammar (they won't) or an editor to produce print files (they don't).