Audiobooks are the fastest growing slice of book sales in the US. Listeners now spend more on audio than on ebooks in many categories. If you have a published book and you are not in audio yet, you are leaving real money on the table.
ACX, which stands for Audiobook Creation Exchange, is the platform Amazon runs to connect authors and rights holders with narrators and producers. It is also the gateway to selling on Audible, Amazon, and Apple Books, which together cover most of the English-language audiobook market.
This guide walks through how ACX actually works, from setting up an account to picking a narrator, surviving production, and getting paid.
ACX Eligibility
ACX is open to authors, publishers, narrators, and producers in the US, UK, Ireland, and Canada. You need a tax ID, a bank account in one of those countries, and the audio rights to the book you want to produce.
That last point trips up authors who signed traditional publishing deals. If your contract gave the publisher all rights including audio, you cannot put the book on ACX yourself. Check your contract before you do anything else. If you self-published, audio rights are usually still with you.
Books need to be available for sale somewhere already. ACX will not produce audio for unpublished manuscripts. The book has to exist as an ebook, paperback, or hardcover that listeners can buy if they want the print version.
Setting Up an ACX Account
Account setup is straightforward. You sign in with an Amazon account, accept the terms, fill out a tax interview, and add payment details. The tax piece takes ten minutes if you have your ITIN or SSN handy. If you are based outside the US but want to sell on Audible US, you fill out a W-8BEN to claim the reduced withholding rate under your country’s tax treaty.
Once your account is live, you claim your title. ACX pulls your book in from Amazon when you enter the ASIN. If it does not appear, the book is either too new (give it a week after publication) or has a metadata mismatch you need to fix in KDP first.
Picking a Production Path
ACX gives you three ways to get an audiobook made.
Do It Yourself
If you have a quiet space, a decent microphone, and the patience to learn audio editing, you can narrate your own book. This is more work than most authors expect. A finished hour of audio takes six to eight hours of recording and editing for a beginner, and the technical bar from ACX is firm. You will need to meet RMS, peak, and noise floor specs that home setups often miss.
Self-narration works best for memoir, where your voice is part of the appeal, and for nonfiction by a recognized expert. Fiction is harder. Voicing multiple characters across a novel takes craft most authors do not have.
Royalty Share
You hire a narrator who agrees to be paid in royalties instead of cash. Both parties split the royalties on Audible fifty-fifty for seven years. After seven years, the rights revert to you. This option costs nothing upfront and is popular with authors who do not have the budget for production but have a book that sells.
The catch is that experienced narrators only take royalty share deals on books they think will earn. If your book has weak sales, no platform, and no marketing plan, the narrators who audition will be mostly beginners. You get what you pay for.
ACX also offers a Royalty Share Plus option, where you pay a small per-finished-hour fee on top of the royalty split. This widens the pool of narrators willing to work with you.
Pay for Production
You pay the narrator a flat fee per finished hour and keep all the royalties yourself. Rates as of 2026 typically run from one hundred fifty to four hundred dollars per finished hour for capable working narrators, with higher rates for SAG-AFTRA and union talent. A seven-hour audiobook at three hundred dollars per finished hour costs about twenty-one hundred dollars.
This is the right path if you can afford it. You keep more of the long-term revenue, you have full control over the timeline, and you do not split rights for seven years.
Finding a Narrator
You post your book and a sample script of fifteen hundred to two thousand words. Narrators audition by recording the script. You listen, decide who fits, and offer them the project.
The sample script you choose matters more than authors realize. Pick a passage that shows range: a section with dialogue, a section with description, and if applicable, a scene with emotional weight. Avoid the first chapter if it is unusually slow or atypical of the book.
When you listen to auditions, set aside an hour and listen to all of them in a row. Make a shortlist of three to five. Sleep on it. The voice that grabbed you on first listen is not always the one that will sustain across seven hours.
Listen for These Things
Pace and clarity come first. Can you follow the sentences without rewinding? Pronunciation accuracy comes next. If your book has technical terms or proper names, send those words to your top candidates and ask for a short recording before you commit. Character voices come third for fiction. They should be different enough to follow, but not so cartoonish that they pull you out of the story.
What you cannot judge from a fifteen-minute audition is consistency over a long book. That is why references and past work samples are useful. Ask shortlisted narrators for a link to a finished audiobook they have produced.
The Production Timeline
Once you offer the role and the narrator accepts, ACX gives them a deadline (usually thirty to sixty days) to deliver the first fifteen minutes. You review that and either accept or send notes. After approval, they produce the rest in batches.
The standard timeline for a seven to ten hour book is two to four months from contract to final delivery. Some narrators move faster. Some take longer. Build slack into your launch plan.
When the full audiobook is delivered, you have fifteen business days to listen and approve, request edits, or reject. Use that time. Listen on the device most of your readers will use, usually phone speakers or earbuds. Catch every pronunciation mistake, fluff, breath, or pacing issue before approval, because edits get harder once the book is live.
Technical Standards
ACX enforces technical specs that catch a lot of first-time producers off guard. Every chapter file needs to sit between RMS values of -23 dB and -18 dB, with peaks no higher than -3 dB and a noise floor no higher than -60 dB. Files have to be constant bit rate at 192 kbps or higher, 44.1 kHz, in MP3 format. Each file needs room tone of at least one second at the head and tail, plus a spoken section header at the start naming the chapter.
If you are working with a professional narrator, they handle this. If you are narrating yourself, expect to spend real time learning the specs and reworking files until they pass. ACX rejects files that fail any of the requirements, and the back-and-forth can stretch your timeline by weeks.
Royalty Models
ACX gives you a choice between exclusive and nonexclusive distribution.
Exclusive means the audiobook is sold only through Audible, Amazon, and iTunes. You earn 40 percent royalties on each sale.
Nonexclusive means you can sell the audiobook anywhere, including Kobo, Google Play, Spotify, Findaway Voices, libraries, and your own website. You earn 25 percent royalties on Audible, Amazon, and iTunes sales.
The math depends on how much you can sell elsewhere. For most authors, especially first-time audiobook publishers, exclusive earns more in the short term because Audible is by far the biggest audiobook retailer. But you give up the chance to sell on platforms that pay better per unit, and you lock yourself in for seven years.
If you have a back catalog and an audience that buys outside Audible, nonexclusive is worth the math. If this is your first audiobook and you have no audio sales history, exclusive is the safer start.
Bounties & Promo Codes
Two parts of the ACX royalty system get overlooked.
Bounties pay you seventy-five dollars when an Audible listener uses your book as the first audiobook on a new trial membership. If you market your audiobook to readers who have never used Audible, you can earn meaningful side income from bounties on top of royalties.
Promo codes let you give your audiobook away free to reviewers, podcasters, and your audience. Exclusive titles get one hundred US codes and one hundred UK codes per six months. Nonexclusive titles get twenty-five each. Use them. Audiobook reviews on Audible move sales, and getting fifty real listeners reviewing in your first month is one of the best launch moves available.
Marketing the Audiobook
A finished audiobook does not sell itself. Your covers, descriptions, and categories work the same on Audible as on Amazon, but audio buyers behave differently from ebook buyers. They are commuters, gym-goers, dog walkers, and people who hate scrolling. They want hooks they can hear in the sample.
The first five minutes of your audiobook is the sample Audible shows on the product page. If your book opens slowly, consider pairing the sample with a different excerpt that has more energy. ACX lets you upload a separate retail sample.
Podcast appearances are the highest leverage audio marketing channel. If your book is in a category podcasters cover, getting on three or four podcasts in launch week often outperforms paid ads dollar for dollar.
Beyond podcasts, three other channels move audio sales. Email lists are first. Listeners who already trust your voice in writing convert into audio buyers at high rates if you give them a reason. A short email with a sample clip lands better than a text-only promo.
Bookstagram and BookTok work for fiction, especially in romance, fantasy, and YA. Audio is harder to demo on visual platforms, but creator-led video reviews of audiobooks have become their own subgenre.
Audiobook newsletters like AudaCity, AudioFile Magazine, and Chirp’s daily deals reach buyers who specifically want audio. Submission processes vary, and lead times can stretch to three months, so plan ahead.
Mistakes to Avoid
Picking a narrator on price alone is the first one. The cheap option usually requires a re-recording six months later when sales stall. Pay once.
Skipping the test pages is the second. Always have the narrator record a short test from your book, not just the audition script, before you sign. Some narrators have great sample reels but fall apart on dense or technical text.
Approving the audiobook without listening end to end is the third. Pronunciation errors, dropped sentences, and consistency issues sneak through batch reviews. Listen to the final cut as one continuous experience.
Forgetting to update your sales page is the fourth. Many authors finish the audiobook and never mention it on their website or in their email list. Sales depend on people knowing the audio version exists.
Going exclusive without doing the math is the last one. Exclusive locks you in for seven years. Spend an hour modeling sales under both options before you click.
After Launch
Audio sales build slowly. Where ebook launches spike and decline, audiobooks usually start small and grow as reviews accumulate and the algorithm learns. Expect month three to outperform month one. Keep promoting. Keep using your promo codes. The audiobook you launch this year will still be earning royalties five years from now if you keep it visible.
If your first audiobook does well, the second one is easier. Narrators know your work. You know the process. The technical specs that took weeks to nail the first time take an afternoon. By book three, audio becomes a normal part of every release plan, not a separate project to dread.
