This article is an in-depth guide to copy editing. It is for authors who want to bring their books to a publishable level, whether that means understanding the self-publishing process or learning what to expect from the traditional publishing process.

What is copy editing?

Let’s start by looking at what copy editing is and how it will help your book.

Copy editing is the stage of the editorial process that makes a manuscript correct, clear, consistent, and ready for publication. A copy editor works through the book at sentence level, correcting errors and making sure the same editorial decisions are applied from the first page to the last.

This includes the things most authors expect, such as grammar, spelling, and punctuation, but the work goes much further. A copy editor might notice that a character’s surname changes halfway through a novel, that email is written three different ways, or that a non-fiction author gives two different dates for the same event. They will either correct the problem or query it when the author’s intention is unclear.

Copy editing normally takes place after the major revisions are complete.

The editorial process will typically follow this order:

  1. Developmental editing addresses the book’s structure, content, and big-picture problems.
  2. Line editing improves the clarity, style, rhythm, and flow of the prose.
  3. Copy editing corrects errors and makes the finished manuscript consistent and accurate.
  4. Proofreading checks the formatted book for any final mistakes before publication.

In practice, these stages can overlap. An editor may include some line editing within a copy edit, while a developmental editor may make occasional sentence-level suggestions. This is not a problem as long as you and the editor agree on the scope of the work before the edit begins.

The aim is not to make every author sound the same. A good copy editor knows the difference between an error and a deliberate choice. Sentence fragments, unusual punctuation, dialect, and non-standard grammar may all be part of the author’s voice. The editor’s job is to remove accidental distractions without sanding away the qualities that make the writing distinctive.

A quick personal note before we plough on. Some authors, and even some editors, use the terms copy editing and proofreading interchangeably. They are not the same thing. If you are looking for an editor to fix the typos in your manuscript, you want a copy editor.

What does a copy editor look for?

So what will a copy editor look for when editing your book?

A copy editor reads with two questions in mind:

  • Whether each sentence works.
  • Whether each sentence agrees with the rest of the book.

At the most basic level, they correct spelling, grammar, punctuation, and syntax. They will spot missing words, misplaced apostrophes, changes of tense, problems with subject-verb agreement, and sentences whose structure obscures the intended meaning.

They will also make hundreds of small decisions about consistency. I can’t emphasise this enough. A copy editor will make sure the way you present and format your prose remains consistent throughout the book.

For example…

  • Will the book use okay or OK?
  • Will numbers below ten be written as words?
  • Will decision-making be hyphenated?
  • Does a particular job title need a capital letter?

None of these choices is necessarily right in isolation. What matters is that the choice suits the book and is applied consistently.

Continuity is particularly important in fiction. For non-fiction, the emphasis may shift towards terminology, references, quotations, tables, and the consistent presentation of information. The editor will check that headings follow a logical hierarchy, lists use the same structure, abbreviations are introduced properly, and specialist terms are used in the same way throughout.

The extent of fact-checking must be agreed in advance. A copy editor will usually notice and query claims that appear contradictory, implausible, or clearly incorrect. However, a standard copy edit does not necessarily include verifying every date, quotation, statistic, citation, or historical claim against its original source. Detailed fact-checking is a separate and time-consuming service.

The editor records their decisions in a style sheet. This is a working document that may contain:

  • preferred spellings and hyphenation;
  • capitalisation and number rules;
  • punctuation choices;
  • a list of characters, places, and important terms;
  • a timeline or other continuity notes;
  • the dictionary and style guide used; and
  • any deliberate exceptions to the normal rules.

The style sheet helps the editor remain consistent and gives the proofreader a record of the decisions already made. It is also useful to the author, especially when writing another book in the same series.

Style manuals

A style manual is a reference book that sets out editorial conventions. It answers questions that may have more than one acceptable answer: whether to use a serial comma, when to write a number as a word, how to capitalise a title, how to present a date, and how to format a quotation or reference.

This is different from a dictionary. A dictionary helps the editor confirm spelling, meaning, and word division. A style manual tells them how a publication has chosen to present language consistently. These rules are not universal laws of English. They are agreed conventions, so two respected manuals can give different answers to the same question.

It is also worth distinguishing a style manual, a house style, and a style sheet:

  • A style manual is a published reference used across an industry or type of writing.
  • A house style contains the choices preferred by a particular publisher, newspaper, business, or organisation.
  • A style sheet records the decisions made for one book, including any ways in which it departs from the chosen manual or house style.

The client will normally set the hierarchy. A publisher might ask the editor to follow its house style first, The Chicago Manual of Style second, and a named dictionary for spelling. The editor then records book-specific decisions on the style sheet. If the house style says to use email but the general manual prefers another form, the house style wins.

Common style manuals

The most appropriate manual depends on the book, its intended market, and the publisher’s requirements. Common examples include:

  • The Chicago Manual of Style is widely used for books published in American English. It covers grammar and punctuation as well as manuscript preparation, notes, bibliographies, quotations, tables, and the many practical details involved in publishing a book.
  • New Hart’s Rules provides guidance for British publishing. It covers matters such as spelling, capitalisation, punctuation, numbers, dates, quotations, references, and the presentation of specialist material.
  • The Associated Press Stylebook is designed primarily for journalism and other forms of concise public communication. It is common in American newspapers, news websites, public relations, and corporate communications, but it is not normally the first choice for editing a novel.
  • The Publication Manual of the American Psychological Association, usually called APA style, is common in psychology, education, and the social sciences. It gives detailed guidance on academic citations, references, tables, statistics, and bias-free language.
  • The MLA Handbook is often used in the humanities, particularly for academic work involving language and literature. It is best known for its system of in-text citations and works-cited entries.

Specialist books may require a specialist manual. Medical writing might follow the AMA Manual of Style, while a legal, scientific, or university press project may have its own conventions. A copy editor does not choose a personal favourite; they use the authority that suits the publication.

What does a style manual decide?

A style manual can provide guidance on:

  • whether to use single or double quotation marks;
  • whether a list should contain a comma before and;
  • when numbers should be written as words or figures;
  • the capitalisation of headings, job titles, historical periods, and named concepts;
  • the treatment of dates, times, measurements, and percentages;
  • whether particular compound words should be open, closed, or hyphenated;
  • how book, film, newspaper, and article titles should appear;
  • the use of italics, abbreviations, dashes, brackets, and ellipses;
  • the formatting of footnotes, bibliographies, and citations; and
  • the presentation of tables, figures, captions, and other supporting material.

No manual will make every decision for every book. A fantasy novel may contain invented words, while a non-fiction book may use specialist terminology absent from any general reference. In these cases, the editor makes a sensible decision, records it on the style sheet, and applies it consistently.

Chicago style vs. AP style

The differences between Chicago style and AP style show why the chosen manual matters.

Chicago normally uses the serial, or Oxford, comma before the final and in a list:

The box contained letters, photographs, and a key.

AP normally omits that comma in a simple list unless it is needed to prevent confusion:

The box contained letters, photographs and a key.

The manuals also treat numbers differently. In ordinary non-technical prose, Chicago generally spells out whole numbers from zero through one hundred. AP generally spells out one to nine and uses figures from 10 onwards. The sentence She collected twelve letters would therefore be normal under Chicago, while AP would usually prefer She collected 12 letters.

There are also differences in the treatment of ranges. Chicago uses an en dash in a range such as pages 12–18. AP has traditionally used a hyphen: pages 12-18. Neither version changes the meaning, but switching between them throughout a book makes the text look careless.

These examples do not mean that Chicago is correct and AP is wrong, or vice versa. Chicago was developed with books and long-form publishing in mind, while AP serves fast-moving news and communications. For most novels and general books written in American English, Chicago is likely to be the more useful starting point. For a British book, New Hart’s Rules or a publisher’s own house style may be more appropriate.

Copy editing vs. line editing and proofreading

Copy editing, line editing, and proofreading all operate close to the level of the sentence, which is why authors often confuse them. The simplest distinction is that they take place for different reasons and at different points in the publishing process.

Line editing asks whether the prose is effective. The editor considers word choice, tone, rhythm, repetition, dialogue, description, and the way one sentence flows into the next. A line editor may substantially recast a sentence in order to make it sharper or more engaging.

Copy editing asks whether the prose is correct and consistent. The editor concentrates on grammar, punctuation, spelling, syntax, accuracy, and continuity. They may make a light change for clarity, but they will not usually rewrite a paragraph simply because they prefer a different style.

Proofreading is the final quality check. It happens after the manuscript has been edited and turned into the pages or ebook files the reader will receive. The proofreader looks for remaining typographical errors and any new problems introduced during typesetting, such as incorrect page numbers, broken headings, inconsistent spacing, or badly placed text.

Consider this sentence:

Walking through the door, the rain ran down Maya’s coat and made a puddle on the floor.

A copy editor would correct the dangling modifier because the sentence says that the rain walked through the door:

As Maya walked through the door, rain ran down her coat and made a puddle on the floor.

A line editor might go further and reshape the image:

Maya stumbled inside, rain streaming from her coat and pooling around her boots.

A proofreader would expect the sentence itself to have been settled. They might instead catch a missing full stop or notice that the paragraph had accidentally been printed twice.

There will always be some overlap. For this reason, never rely on the name of a service alone. Ask the editor what they will change, what they will only query, and what you will receive at the end.

The copy-editing process

Each editor will have their own style and approach, but here is how a typical copy edit works.

The process should begin before the editor changes a single word. They will normally ask about the book’s genre, intended reader, publication route, preferred form of English, and any house style that needs to be followed. They may also request a sample of the manuscript so they can assess the level of work and provide an accurate quotation.

Once the scope, price, schedule, and deliverables have been agreed, the editor will usually work in Microsoft Word using Track Changes. Straightforward corrections are made in the text, while comments are used for questions or explanations.

An editor might query a sentence because its meaning is unclear, ask the author to confirm a date, or point out that a passage contradicts an earlier chapter. These queries do not mean that the editor has failed to do their job. They recognise that the author understands the book’s intention better than anyone else and that guessing could introduce a new error.

The author then reviews the edited file. You remain in control of your manuscript and can accept or reject individual changes. However, it is worth understanding why a change was made before rejecting it. If the explanation is unclear, ask. A professional editor should be able to justify a correction without insisting that every personal preference is a rule.

Alongside the manuscript, the editor should provide the style sheet developed during the edit. Depending on the agreement, they may then review the author’s answers to queries or carry out a final clean-up pass. This second pass is not automatically included in every service, so it should appear clearly in the quotation or contract.

At the end of the process, you should know exactly which file is the current master copy. Losing track of versions is an easy way to restore old errors or send an uncorrected file for formatting.

Examples of copy editing

The easiest way to understand copy editing is to see the kinds of changes an editor makes.

Correcting grammar and punctuation

Before:

Neither of the guards were watching the gate, its hinges squeaked as Lena pushed it open.

After:

Neither of the guards was watching the gate. Its hinges squeaked as Lena pushed it open.

The edit corrects subject-verb agreement and separates a comma splice into two sentences. The action and the author’s style remain unchanged.

Clarifying an ambiguous sentence

Before:

When Priya met Hannah after she left work, she seemed upset.

After:

When Priya met Hannah after work, Hannah seemed upset.

The original leaves the reader unsure who left work and who seemed upset. If the surrounding text did not make the answer clear, the editor would query the sentence instead of assuming.

Applying a consistent style

Imagine that a manuscript contains all three of these forms:

e-mail
email
E-mail

Unless there is a reason for the variation, the editor will choose one form—probably email in modern general writing—and use it throughout. The decision will be recorded on the style sheet so the proofreader can preserve it.

Querying continuity

Chapter two:

Daniel locked the red bicycle outside the station.

Chapter four:

Daniel recognised his blue bicycle beside the station entrance.

The editor cannot know whether the bicycle changed, whether Daniel owns two bicycles, or whether one colour is simply an error. Rather than silently choosing one, they might add: “Earlier the bicycle is red. Should the colour be changed here?”

This is an important part of copy editing. The best edit is not always a correction; sometimes it is the right question asked in the right place.

Querying a factual claim

Original:

The first modern Olympic Games took place in Paris in 1896.

Edited:

The first modern Olympic Games took place in Athens in 1896.

This is a straightforward factual correction that can be verified easily. If the claim were disputed, dependent on a specialist interpretation, or central to the author’s argument, the editor should query it and provide the source rather than quietly changing it.

When is a manuscript ready for copy editing?

A manuscript is ready for copy editing when its content and structure are settled. You should be happy with the plot, characters, chapters, arguments, and overall organisation of the book. Any developmental editing and substantial line editing should already be complete.

The manuscript does not have to be perfect. Correcting the remaining sentence-level problems is the reason you are hiring a copy editor. However, you should not still be planning to remove chapters, rewrite the ending, change the point of view, or add thousands of new words.

Copy editing material that will later be deleted is a waste of money. More importantly, major rewriting after the copy edit can introduce new errors into passages the editor has never seen. If you know that the book still has structural problems, deal with those first.

Before sending the manuscript to the editor:

  • combine the complete book into the agreed file format;
  • remove old comments, highlighting, and rejected revisions unless the editor needs them;
  • run your own final self-edit and spellcheck;
  • identify the form of English you want to use;
  • provide notes about unusual names, invented terms, deliberate stylistic choices, or series continuity;
  • include footnotes, references, tables, captions, and any other material covered by the quotation; and
  • keep a secure copy of the file you send.

You should also tell the editor about your publication deadline. A rushed edit is more expensive and may not be possible, especially since experienced editors often book projects months in advance.

How much does copy editing cost and how long does it take?

Copy editors charge by the word, hour, manuscript page, or complete project. A fixed project price is often the easiest option for an author because you know the total cost before work begins. However, the editor will still calculate that fee by considering the word count, the likely editing speed, and the level of intervention required.

The Editorial Freelancers Association’s 2026 rate chart reports fiction copy-editing rates of 2.0–2.7 US cents per word, or $40–$50 per hour. At the per-word rate, a 60,000-word novel would cost roughly $1,200–$1,620.

For a UK comparison, the Chartered Institute of Editing and Proofreading’s suggested minimum rates list £37.11 per hour for copy editing from 1 March 2026. The CIEP stresses that this is a suggested starting point rather than a compulsory fee.

These figures are useful benchmarks, not promises about what your edit will cost. The final quotation will depend on:

  • the length and condition of the manuscript;
  • the amount of intervention required;
  • the genre and complexity of the text;
  • the need to check references, tables, quotations, or specialist terminology;
  • the editor’s experience and subject knowledge;
  • the file format and the way the book has been prepared; and
  • the deadline.

A clean 60,000-word romance novel will probably be faster to edit than a 60,000-word history book containing hundreds of citations. Two books with the same word count can therefore attract very different quotations.

The same factors determine the schedule. An editor may be able to work through several thousand words a day, but copy editing involves more than reading. They must check questions, maintain the style sheet, revisit earlier decisions, and leave enough concentration for the final chapters. For a full-length book, it is sensible to expect the work to take several weeks rather than several days.

When comparing quotations, compare the service as well as the total. A cheaper quote may exclude a style sheet, reference checking, or a review of your answers to queries. Ask each editor to state exactly what is included so that you are comparing like with like.

How to choose a copy editor

A good copy editor needs more than an excellent grasp of grammar. They must know when a rule applies, when an exception is justified, and when changing a sentence would damage the author’s meaning or voice.

Start by looking for an editor with relevant experience. A fiction editor should understand dialogue, point of view, and narrative continuity. An editor working on academic or specialist non-fiction may need experience with a particular citation system or subject. Genre knowledge is useful because conventions that suit a business book may be completely wrong for a fantasy novel.

Ask for a sample edit. For copy editing, this should normally show tracked changes and queries on a short section of your own manuscript. The purpose is not to get free editing. It allows the editor to assess the work, and it allows you to see whether their approach is accurate, clear, and respectful of your voice. Some reputable editors charge for a substantial sample, so a paid sample is not automatically a red flag.

Before booking, confirm:

  • the precise level of editing;
  • the files and supporting documents you will receive;
  • whether a style sheet is included;
  • whether the editor will review your responses to queries;
  • the start date and delivery date;
  • the price and payment schedule;
  • the cancellation terms; and
  • how the manuscript will be stored and kept confidential.

These details should be recorded in a contract or written agreement. Be cautious if an editor cannot explain their process, refuses to provide any evidence of relevant work, pressures you to pay immediately, or promises an implausibly fast turnaround. A very low price can also indicate that the editor has underestimated the time required or intends to rely on automated checking instead of reading the book carefully.

You should also ask whether the editor uses artificial intelligence. Spellcheckers and established editorial tools have long formed part of an editor’s workflow, but generative AI creates additional questions about confidentiality, data processing, accuracy, and consent. An editor should tell you whether any part of your manuscript will be uploaded to an external service and obtain your agreement before doing so. If you do not want generative AI used on your book, put that condition in the contract.

Finally, choose someone with whom you can communicate. Copy editing involves judgement, and you may need to discuss changes or answer detailed questions. The cheapest or most qualified editor on paper is not necessarily the right editor for your book if you cannot work together effectively.

Qualifications

There is no single licence or qualification that someone must hold before calling themselves a copy editor. In the United States, ACES states explicitly that there is no formally recognised national certification standard. The UK also has several respected training routes rather than one compulsory professional examination.

Qualifications are useful evidence, but they are not proof of ability on their own. A certificate shows that an editor has completed a particular programme. It does not tell you whether they have edited a full novel, understand your genre, communicate well with authors, or keep their knowledge up to date.

UK training and professional recognition

Common UK routes include:

  • The Chartered Institute of Editing and Proofreading copyediting courses. The CIEP offers three progressive courses: Copyediting 1: Introduction, Copyediting 2: Headway, and Copyediting 3: Progress. The second and third courses are assessed, and students receive certificates when they complete the courses.
  • The Institute of Publishing’s distance-learning courses. Its Essential Copy-Editing course is tutor guided and fully assessed, leading to a certificate of achievement. It is designed as an in-depth course rather than a short introduction.
  • A degree or postgraduate qualification in publishing, English, linguistics, journalism, or a specialist subject. These can provide useful knowledge, but an English degree is not the same as practical copy-editing training. Editing requires additional skills such as applying a brief, using Track Changes, querying an author, constructing a style sheet, and preparing a manuscript for production.

CIEP membership can provide another useful signal, but you need to look at the grade. Anyone can join at Entry-Level, whereas Professional and Advanced Professional membership requires evidence of training, experience, and competence. The grade therefore tells you more than the words “CIEP member” on an editor’s website.

US training and certificates

Common American options include:

  • The University of Chicago’s online Editing certificate. This is a multi-course, non-credit programme covering practical editing, electronic tools, working with authors, and The Chicago Manual of Style.
  • The Poynter ACES Certificates in Editing. The programme offers introductory, intermediate, and advanced certificates covering areas such as grammar, clarity, verification, ethics, editorial technology, and professional practice.
  • University publishing, journalism, communications, or subject-specific programmes. These may be valuable when supported by practical editorial training and experience relevant to the type of book being edited.

Professional membership of ACES or the Editorial Freelancers Association can show that an editor participates in the wider editorial community, but membership alone is not a qualification or guarantee of ability. Unlike the higher CIEP grades, general membership does not represent an assessment of an individual’s copy-editing competence.

What should an author look for?

When assessing qualifications, ask what the training actually involved. An assessed course containing practical editing exercises and individual feedback provides stronger evidence than an unassessed webinar accompanied by a completion badge.

I would look for a combination of:

  • specific training in copy editing rather than a general claim to be good at English;
  • experience editing complete books in the relevant genre or subject;
  • knowledge of the appropriate style manual and form of English;
  • confidence with Track Changes, author queries, and style sheets;
  • recent continuing professional development;
  • testimonials or references from relevant clients; and
  • a strong sample edit of your own manuscript.

For specialist non-fiction, subject expertise may be as important as general editorial training. An editor working on a medical, legal, scientific, or academic book needs to understand its terminology, evidence, and referencing conventions. This does not always mean they need the highest possible degree in the subject, but they should be honest about the limits of their knowledge and know when to query rather than guess.

Ultimately, qualifications help you create a shortlist. The sample edit, relevant experience, and clarity of the editor’s process should help you make the final choice.

What happens after copy editing?

When the edited manuscript is returned, do not simply accept every change at once. Work through the file carefully, answer the editor’s queries, and consider each substantial alteration. This is your opportunity to catch misunderstandings and make the final decisions about your book.

At the same time, avoid making unnecessary last-minute rewrites. Any new passage you add has not been copy edited. If a query requires a substantial addition, ask whether the editor can check the revised material before the manuscript moves forward.

Once every query has been resolved and the changes have been reviewed, create a clean master file. Keep the tracked version as a record, but send the clean, agreed version for typesetting or ebook conversion.

Formatting is not a neutral process. Text can be omitted, duplicated, moved, or given the wrong style. Page breaks can create awkward headings, italics can disappear, and ebook conversion can introduce its own display problems. This is why copy editing is not the final step.

The formatted print pages and ebook should receive a proofread before publication. The proofreader is not there to repeat the copy edit or rewrite the book. They provide the last pair of eyes, checking that the words you approved have survived the production process and that the reader receives the cleanest possible version of your work.