You pay per character, you ship per minute
At 150 words per minute and about 5.8 characters per word, one minute of speech is roughly 870 characters. A 10-minute video is 8,700 characters — cheap on most plans. The cost only becomes real once you multiply by regenerations and volume.
Regeneration is the silent budget killer
Mispronounced names, wrong emphasis, unnatural pauses — each fix means regenerating the segment and paying again. Teams routinely generate 1.4–2× their published audio. Fixing pronunciation with phoneme tags up front is cheaper than regenerating the whole take.
- • Generate per-paragraph, not per-video, so a fix costs one paragraph.
- • Use pronunciation/phoneme tags for names and jargon.
- • Lock the voice and settings before batch production.
- • Keep a glossary of problem words for the whole channel.
AI voice versus a human voice actor
Professional voiceover runs $50–$500 per finished minute depending on usage rights. AI lands at cents. The genuine trade-offs are emotional range, brand risk, and licensing — check that your provider's terms permit commercial use and, if you clone a voice, that you have documented consent from its owner.
Related guides
Long-form playbooks on the same topic, written by the RevenueLab editorial team.
FAQ
How much does AI voice generation cost per minute?
One minute of speech is roughly 870 characters. At $150 per million characters that's about $0.13 per minute of generated audio, or around $0.18 with a 40% regeneration rate. Editing labour usually costs more than the audio itself.
How many characters is a 10-minute video?
About 8,700 characters at a normal 150-word-per-minute narration pace. Faster delivery (170+ wpm) pushes that towards 10,000.
Is AI voiceover cheaper than a voice actor?
By 100× or more on raw cost — cents versus $50–$500 per finished minute. The gap narrows once you count editing time, and human VO still wins for emotionally demanding or brand-critical work.
What does voice cloning cost?
Instant cloning is typically bundled into a $5–$30/month plan. Professional cloning that needs 30+ minutes of source audio usually sits on a higher tier, $99+/month. Both bill generation separately, per character.
How do I cut my TTS bill?
Reduce regenerations (the biggest waste), generate at paragraph granularity so fixes are cheap, trim filler words from scripts, and check whether a lower-tier voice model is indistinguishable for your use case — many are, at a fraction of the price.
Can I use AI voice commercially?
Depends entirely on your provider's licence and plan tier. Many free tiers explicitly forbid commercial use, and cloned voices require documented consent from the voice's owner. Read the terms before you publish or monetise.
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Written by Sam Doshi and the RevenueLab editorial team. We don't sell the data feeds this tool is built on.
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