Audiobooks for Indie Authors: ACX, Findaway Voices (Now INaudio), and Getting Started

Audiobooks are one of the fastest-growing formats in publishing, and for many genres, audiobook listeners are a distinct audience from ebook and print readers, people who consume books during commutes, workouts, and chores, often at a higher volume than they read text. For indie authors, audiobooks represent both an additional revenue stream and a way to reach readers who might never have picked up your ebook.

Producing an audiobook is also one of the more involved and costly steps in an indie author's publishing process, with production costs often exceeding what's spent on cover design and editing combined. This guide covers the main platforms, production options, and what to expect from cost and timeline perspectives.

Why audiobooks matter for indie authors

A genuinely different audience: many audiobook listeners primarily or exclusively consume books in audio. For these readers, a book that doesn't exist in audio simply doesn't exist as an option, regardless of how good the ebook or print edition is.

Higher price points, comparable royalty mechanics: audiobooks typically retail for more than ebooks, often $15-$25 for a full-length book, with royalty structures (depending on platform and arrangement) that can make audiobooks a meaningful per-unit revenue source.

Series read-through in audio: like ebooks, audiobook listeners who finish book one in a series often continue to subsequent books, particularly through subscription services like Audible's credit system, where "what should I spend my next credit on" naturally favors an author's existing series.

Library and subscription discovery: audiobooks are heavily used through library apps (Libby/OverDrive) and subscription services (Audible, Spotify's audiobook offerings, Scribd), which can introduce your work to readers who discover you through a channel other than retail browsing.

The audiobook market landscape

Audible (owned by Amazon) is the dominant audiobook retailer and subscription service in the US and several other markets, similar to Amazon's dominance in ebooks. This gives ACX (Audible's self-publishing platform) outsized importance, similar to KDP's importance for ebooks.

But the audiobook market beyond Audible has grown significantly: Apple Books, Spotify (which sells audiobooks and includes audiobook listening in eligible Premium plans), Google Play Books, Kobo, and library platforms (Libby, Hoopla) all represent meaningful audiobook listening. As with ebooks, the "go exclusive with the dominant player or go wide" decision applies to audiobooks too, through ACX's exclusivity options vs. wide distribution through a distributor such as Voices by INaudio.

ACX: Audible's self-publishing platform

ACX (Audiobook Creation Exchange) is Amazon/Audible's platform for producing and distributing audiobooks, conceptually similar to KDP for ebooks.

ACX royalty structure

ACX offers two royalty arrangements. Its rates changed on May 26, 2026: new titles, new users and titles enrolled in the new model earn the rates below, while titles still on the legacy model earn 40% and 25% until that model ends at year-end.

Exclusive distribution (50% royalty): your audiobook is sold only through Audible, Amazon and Apple Books, and you earn 50%.

Non-exclusive distribution (30% royalty): your audiobook is sold through ACX to Audible, Amazon and Apple Books while also being distributed elsewhere (through Voices by INaudio or other channels) for the rest of the audiobook market. In exchange for this flexibility, ACX's royalty drops to 30%.

For listening by Audible members, ACX now calculates royalties on "Member Value": the member's monthly plan revenue after taxes and fees, divided among the titles they listened to in proportion to each title's price, then multiplied by your rate.

This mirrors the KDP Select vs. wide decision in ebooks: exclusivity for a higher royalty rate on the dominant platform, or flexibility for wide reach at a lower rate on that platform.

Production arrangements on ACX

ACX connects authors ("rights holders") with narrators ("producers") through a few different arrangements:

Pay-per-finished-hour (PFH): you pay a narrator a flat rate per finished hour of audio (typically $100-$500+ per finished hour depending on narrator experience and demand), and you retain all royalties. This is an upfront cost but gives you full ownership of royalty income going forward.

Royalty share: the narrator produces your audiobook for no upfront fee, in exchange for a share of ongoing royalties (a 50/50 split; under the new model each side earns 25% of an exclusive title). This eliminates upfront cost but means giving up half your audiobook royalty for the seven years the narrator is paid. Royalty share titles must be distributed exclusively through ACX, and they are harder to find for new authors without an established catalog, since narrators are taking on the risk of unpaid work.

Hybrid arrangements: some narrators offer a reduced PFH rate combined with a smaller royalty share, splitting the risk between author and narrator.

Estimating audio length and cost

A useful rule of thumb: audiobooks run roughly 9,300-9,800 words per finished hour for most fiction at a typical narration pace (some narrators are faster or slower, and nonfiction with heavy technical content can run differently). A 90,000-word novel is roughly 9-10 finished hours. At $200/finished hour PFH (a mid-range rate), that's $1,800-$2,000 for narration alone, before any additional production costs (editing, mastering, ACX's quality review process).

Voices by INaudio (formerly Findaway Voices): wide audiobook distribution

Findaway Voices, the long-standing aggregator for distributing audiobooks beyond Audible, left Spotify on August 1, 2025 and now operates independently as INaudio, with the author platform called Voices by INaudio. Through one upload, it can distribute your audiobook to more than 30 platforms, including:

• Apple Books
• Spotify
• Kobo
• Google Play Books
• Library platforms (OverDrive/Libby, Hoopla, and others)
• Various international audiobook retailers

How Voices by INaudio works

You upload your finished audio files (the same files you'd use on ACX, typically MP3 files per chapter meeting specific quality requirements) along with your metadata and cover art. Voices by INaudio distributes to its retail and library network, and you receive royalty reports and payments through their platform.

Royalty rates: you receive 80% of what each partner pays INaudio, with no upfront or subscription fees. INaudio puts typical partner rates at 40% to 50% of list price for a la carte sales and 30% to 40% for subscription listening, and it charges no fee on Spotify sales made through it.

Combining ACX non-exclusive with Voices by INaudio: a common wide audiobook strategy is ACX non-exclusive (30% royalty on Audible, Amazon and Apple Books under the new model) combined with Voices by INaudio for everything else, delivering to Apple Books through only one of them. This mirrors the ebook wide strategy of KDP plus D2D.

Producing your audiobook: the process

1. Prepare your manuscript for narration

Audiobook narrators work from your finished manuscript, but a "narrator's script" sometimes differs slightly from the print/ebook version: footnotes, complex tables, and certain visual elements (a recipe formatted as a table, for instance) need to be adapted for audio. For most fiction, this adaptation is minimal; for nonfiction with heavy visual elements, more planning is needed.

2. Decide on narration approach

Single narrator: most fiction uses one narrator who voices all characters and narration. Choosing a narrator whose voice and performance style fits your book's tone and genre matters significantly, listeners are sensitive to narrator-book fit.

Multiple narrators / dual POV: books with alternating points of view (common in romance and some YA) often use two narrators, one per POV character. This is more complex to produce and typically costs more.

Full cast: rare for indie audiobooks due to cost, but used for some highly produced projects, particularly in audio drama-adjacent formats.

3. Audition and hire a narrator

ACX's platform allows you to post your project and invite narrators to audition with a sample of your text. Review auditions for voice quality, pacing, character differentiation (if your book has dialogue from multiple characters), and overall fit with your book's tone. Many narrators also maintain demos and profiles outside ACX (on their own websites or through narrator directories) if you're sourcing talent independently for non-ACX production.

4. Production and quality requirements

ACX has specific audio quality requirements (file format, noise floor levels, RMS levels for consistent volume, no clipping) that all audiobooks must meet before approval. Professional narrators typically handle their own recording, editing, and mastering to meet these specifications; if you're recording yourself (some nonfiction authors narrate their own books), you'll need to either learn audio editing or hire a sound engineer for post-production.

5. Quality control review

Both ACX and Voices by INaudio review submitted audio for technical quality (meeting the audio specifications) and, in ACX's case, for content matching the approved text. This review can take 1-2 weeks. Files that don't meet specifications are returned for correction before resubmission.

AI narration: an emerging option

AI-generated narration has become a viable option for some indie authors, particularly for nonfiction, lower-budget projects, or as a way to test whether an audiobook edition generates enough interest to justify investing in human narration later.

Where AI narration is available: some platforms (including certain ACX-adjacent tools and dedicated AI audiobook services) offer AI voice generation from your manuscript text, at a fraction of the cost of human narration.

Quality considerations: AI narration quality has improved significantly, but listener reception varies by genre. Nonfiction listeners are often more accepting of AI narration than fiction listeners, who tend to value performance and character voicing that current AI narration handles less convincingly than skilled human narrators, particularly for dialogue-heavy fiction.

Disclosure: where AI narration is used, transparency with listeners (and compliance with each platform's current policies on AI-narrated content, which have evolved and continue to evolve) is important. Policies on AI narration vary by platform and change over time; check current requirements on ACX, Voices by INaudio, and any other platform before using AI narration for audiobook production. See our guide on using AI tools responsibly for the broader disclosure and copyright considerations that apply across text, cover art, and narration.

A reasonable framing: AI narration can be a way to offer an audio edition for books where human narration economics don't work (a low-volume backlist title, for example), while reserving human narration investment for titles where you expect the strongest audiobook demand (typically your lead titles or series openers).

Audiobook rights and contracts with narrators

When you hire a narrator through ACX, you're entering into a contract that governs the relationship for the life of the audiobook (royalty share agreements typically run a minimum of 7 years, with automatic renewal unless either party opts out at renewal time). Understanding the basics of these agreements before signing matters.

What the contract covers: the royalty split (or PFH payment), the territories and exclusivity terms, the narrator's credit and any promotional rights, and the process for handling revisions (if you need to update the audiobook because the text changed, for example).

Exclusivity and ACX: ACX's standard agreements are tied to ACX's distribution terms (exclusive 50% or non-exclusive 30% under the new model). If you choose exclusive distribution, your narrator agreement is also bound by that exclusivity for the audiobook's distribution.

What happens if a narrator becomes unavailable: in a royalty share arrangement, if a narrator can no longer fulfill obligations (rare, but contracts should address this), the agreement typically has provisions for how royalties continue or how the relationship can be dissolved. Reading the standard ACX agreement terms (available during the platform's audition and offer process) before committing helps you understand what you're agreeing to, particularly for the multi-year royalty share commitment.

Revisions after publication: if you make substantive changes to your book's text after the audiobook is produced (a new edition, for example), coordinating an audio update with your narrator is a separate negotiation; minor changes are often not worth re-recording, while major content changes may require it.

International audiobook markets

Audiobook consumption varies by country, similar to ebook platform preferences. Audible has significant presence not just in the US but also the UK, Germany, France, and other markets, each with localized storefronts. For non-English audiobooks or international rights, the considerations multiply: a translated audiobook requires both a translation of the text and a narrator fluent in the target language, effectively a separate production.

For English-language audiobooks, ACX and Voices by INaudio distribution covers the major English-speaking markets (US, UK, Canada, Australia) through their standard distribution. Authors targeting non-English markets typically need separate production and rights arrangements for each language, a significant undertaking usually reserved for authors with established sales data justifying the investment.

Pricing and royalty expectations

Audiobook pricing is largely set by the platform (Audible uses a credit system where listeners redeem monthly credits, decoupling "price" from a simple dollar amount for many purchases) or follows retail pricing conventions similar to print books ($15-$25 for a full-length audiobook on platforms with direct retail pricing).

Realistic royalty per sale: on ACX exclusive (50% under the new model) for a book priced around $20, an outright sale might yield up to about $10 in royalty, less after any retailer discounts. Listening by Audible members is paid on Member Value rather than per copy, so it can be higher or lower than an outright sale depending on how members use their plans.

Recouping production costs: for a $2,000 PFH production cost at roughly $6-10 royalty per sale, recouping costs requires several hundred sales, which for most indie titles takes months to years, not weeks. This is why audiobook production is often approached as a longer-term investment, particularly for series where audiobook listeners who finish book one are likely to buy subsequent books, spreading the production cost's payoff across the whole series' audiobook sales.

Audiobook marketing considerations

Audiobook listeners discover books somewhat differently than ebook or print readers:

Audible's algorithm and "also-bought": similar to Amazon's ebook recommendations, Audible's platform surfaces related titles based on listening patterns. A growing audiobook catalog benefits from cross-title visibility, similar to ebook backlist effects.

Sample listening: Audible provides sample clips (similar to "Look Inside" for ebooks). A strong narrator performance in the opening minutes matters for converting browsers to buyers.

Reviews matter: audiobook-specific reviews (which often comment on narration quality separately from the writing) influence purchase decisions. A well-written book with a poorly-received narration performance can underperform its ebook counterpart, which is part of why narrator selection matters so much.

Promotional tools: ACX and Audible occasionally run promotional pricing programs for audiobooks, similar to Kindle Countdown Deals. Voices by INaudio and other distribution channels have their own promotional opportunities, generally less developed than Audible's.

Frequently asked questions

Do I need an ISBN for my audiobook?

Audiobooks generally don't require an ISBN for ACX distribution (Audible assigns its own identifiers). For wide distribution through Voices by INaudio, an ISBN may be requested for some retail partners; check current requirements during setup.

Can I narrate my own audiobook?

Yes, particularly common for nonfiction, memoir, and self-help, where the author's voice adds authenticity. You'll need recording equipment that meets ACX's technical specifications (a quality microphone, a quiet recording space, and either editing skills or a hired audio editor for post-production).

How long does audiobook production typically take?

From hiring a narrator to a finished, approved audiobook, 2-4 months is common for a full-length novel, accounting for narration time (a narrator typically records multiple finished hours per week, not all at once), editing, mastering, and the platform review process.

Can I use ACX and Voices by INaudio (formerly Findaway Voices) together?

Yes, with ACX's non-exclusive option (30% royalty under the new model), which allows you to also distribute through Voices by INaudio. ACX exclusive (50% royalty) does not permit distribution elsewhere for the audiobook, similar to how KDP Select restricts ebook distribution.

What genres benefit most from audiobooks?

Fiction genres with strong series readership (romance, fantasy, thriller, mystery) and nonfiction in self-help, business, and memoir tend to perform particularly well in audio, partly because these genres' readers are more likely to be habitual audiobook/podcast listeners already.

Should a new author prioritize audiobook production?

For most brand-new authors, audiobook production is a significant upfront cost relative to uncertain initial demand. Many authors prioritize building an ebook/print catalog first, then add audiobooks for titles or series that show strong reader engagement, where the audiobook investment is more likely to pay off across a series' lifetime.

The bottom line

Audiobooks represent a genuine additional revenue stream and audience for indie authors, but they come with production costs and timelines that are higher than ebook or print formatting. ACX (with its exclusive/non-exclusive royalty choice) and Voices by INaudio, formerly Findaway Voices (for wide distribution) cover the major platforms. For most authors, audiobook production makes the most sense once a title or series has shown reader demand in ebook and print, making the audiobook a strategic addition to an existing catalog rather than a first investment.

For the broader wide-distribution context that audiobooks fit into, see our guides on going wide vs KDP Select and library distribution. To prepare your manuscript and metadata for every format, get started in LiberScript.