There’s a lot written about how to get started on ACX. There’s not much written about how it actually works once you’re inside it. This post covers the details most guides leave out, from why titles get stuck in review to how royalties actually move and what the platform will and won’t do when things go sideways.
The Two Review Stages Most Authors Don’t Know About
Most people think ACX has one review. It has two, and they work very differently.
The first stage is called the Pending Review. This only happens when you open a title for auditions, and it’s a rights verification check. The most common reason a title gets stuck here is a missing audition script, which is the manuscript excerpt producers use to record their sample. If you didn’t upload it during the claiming process, ACX will email you to ask for it. That email frequently lands in the junk folder. If you miss it, the review just sits there and the clock keeps running without you knowing why. Check your spam before you assume something is wrong on ACX’s end.
The second stage is the Quality Assurance Review. This one happens after production is complete and payment has been exchanged. The QA review can take up to ten business days, and any correction you make during that window restarts the clock from zero. You don’t pick up from day seven. You go back to day one.
Three Things Have to Match Exactly
The ACX quality team checks three elements against each other before a title can go live:
- Cover art: the title and narrator name as they appear on the image
- Internal metadata: what ACX has on file for the listing
- Audio opening and closing credits: what the narrator actually says at the start and end of the recording
All three have to be exact. A narrator’s full name on the cover and a shortened version in the audio credits is enough to stall the review. Same with a title that reads slightly differently across those three locations. And because any correction restarts the ten business day QA clock, one small mismatch can cost you weeks.
Cover art borders are another common flag. ACX requires the image to fill the entire square with no empty space, no frame, no band around the edge.
Why Your Royalties May Not Have Arrived Yet
ACX pays royalties the last week of the following month, so January royalties arrive at the end of February. But there’s a minimum threshold most authors don’t know about, and it’s the reason a live title can look like it’s earning nothing.
If you earn less than $10 in a given month, that amount rolls over. If it keeps rolling and never clears ten dollars, it accumulates until you reach $50 total, at which point ACX releases the full amount regardless. A newer title can look completely silent on the royalty side while it’s actually building toward that threshold. Check your royalty statement, which ACX sends alongside every payment, for the full itemized breakdown.
The 96% Rule That Affects WhisperSync
WhisperSync lets a reader switch between the Kindle ebook and the audiobook and pick up in the same place. Think of it like a bookmark that works across two formats at once. It’s automatically enabled when your title goes live, but it only functions if the ebook and the audiobook have at least a 96% text match.
If you cut content, added bonus material between chapters, or made meaningful changes between the written and recorded script, you may fall below that threshold. The title still publishes and sells, but WhisperSync is quietly disabled. That’s a decision worth making before production starts.
Pay for Finished Hour: How Payment Actually Works on ACX
ACX gives rights holders two ways to pay a narrator. With Pay for Finished Hour (also called Pay for Production or P4P), you pay the narrator a flat rate per hour of completed audio when you approve the final files and you keep all of your royalties. With Royalty Share, you pay nothing upfront and instead split your royalty earnings 50/50 with the narrator for seven years. Royalty Share is only available if you choose exclusive distribution through ACX. Neither option is wrong, but they lead to very different financial outcomes depending on how well your book sells.
If you’re going the Pay for Finished Hour route, here’s what to know before you sign anything.
Budget before you start. ACX estimates that roughly 9,300 words equals one finished hour of audio. Divide your manuscript word count by that number to get a production length estimate. Industry standard rates run around $200 PFH for narration and another $200 PFH for post-production work like editing, mixing, and mastering. A 60,000-word book is roughly six and a half finished hours, which puts a full production in the $2,600 to $5,200 range depending on who you hire and what their rate covers.
ACX calculates the total, but you send the money. When the narrator submits the final audio, ACX multiplies the actual finished run time by the agreed PFH rate and shows you the amount owed. But ACX does not process the payment. You and the narrator need to agree on an external platform, PayPal or Zelle or whatever works for both of you, and settle it directly. That agreement needs to be in writing before production begins, because ACX can’t intervene in payment disputes after the fact.
Know the cancellation terms. If you sign a PFH contract and need to cancel before approving the final audio, ACX’s standard terms require you to pay the narrator a cancellation fee equal to 50% of the estimated production total. That’s a meaningful number on a longer project, so vet your narrator carefully before you sign.
If a dispute comes up, ACX’s role is limited. If a producer goes silent after you’ve paid, ACX will email them twice to encourage them to confirm receipt. After the second email, they hand you the producer’s direct information and step back. The contract exists through ACX, but the money does not, and that distinction matters if something goes wrong.
How to Spot a Bad Actor Before You Sign
ACX is an open marketplace, and not everyone on it is legitimate. A few things to watch for:
- Any producer who asks for payment before submitting audio files. That’s a red flag. Terminate the contract.
- Profile photos that look like stock images. A real narrator will have a real photo.
- Samples that all sound identical with no change in inflection or pacing. That’s often AI-generated audio, which ACX does not accept.
If you suspect a submitted file contains AI narration, you can contact ACX and ask their team to test it. They handle detection and cancellation. You don’t have to manage it yourself.
The safest route is to filter your talent search by Audible Approved Producers. Type AAP in the Find Talent search and you’ll get a list of producers who go through a yearly vetting process and maintain at least a 4.5 star rating to stay in the program.
The Voice Replica Program Is Still Active
If you’re open to AI narration, or if a client is asking about it, the Voice Replica program through ACX is still running and has expanded since its initial beta launch. To find participating narrators, type voice replica in the Find Talent dashboard, listen to samples, and make a direct offer without going through the standard audition phase. That direct offer option was added in a July 2025 update to the program.
It’s worth understanding what you’re actually hiring when you go this route. Voice replica narrators are real people who submitted recordings to ACX, which used that audio to build a high-quality clone of their voice. Before your audiobook goes to QA, the narrator reviews the finished production and edits it for pronunciation errors and pacing. The credit on the product listing will show as “[Narrator Name]’s voice replica,” so your readers can see exactly how the book was produced.
On the compensation side, voice replica projects support three payment structures: royalty share, Pay for Finished Hour, or a blended model that combines both. Under the royalty share model, you as the rights holder receive 30% of Audible net sales receipts and the narrator receives 10%. That’s a different split than a standard royalty share deal with a human narrator, so factor it into your decision before you commit.
If you’re also a narrator and want to offer your own voice as a service through the program, ACX accepts requests at acxbeta@acx.com. Have a fully registered account with a completed tax interview before you reach out.
The thing the platform doesn’t tell you is that most delays are preventable. Fill out every field. Upload every file. Make sure your cover art, metadata, and audio credits match exactly. The authors who hit walls are almost always missing something small that nobody told them to look for.
If you want someone who knows the platform in your corner, that’s exactly what we do at WestSky. Visit our publishing page to learn more, or reach out directly if you’d like to talk through where you are.