You won’t be charged twice for TTS. If Retell is using ElevenLabs as the voice provider, the voice generation cost comes from ElevenLabs, while Retell still charges for call handling and infrastructure. In terms of usage, ElevenLabs is character-based, and in most real setups it roughly translates to about $0.10–$0.30 per minute of generated speech depending on the model. So compared to your current ~$0.175 per interaction, it may go slightly higher, but the jump is usually tied to better voice quality and consistency rather than duplicate fees. If you want a tighter estimate, I can map it directly to your average call length. @Luke