This guide details how billing works for Hume products and how to manage billing on your account.

- **Pricing**: See plans and inclusions on our [pricing page](/content/pricing/index.html).
- **Billing**: Update payment methods and change plans in the [billing portal](https://app.hume.ai/billing).
- **Support**: Questions? Email [billing@hume.ai](mailto:billing@hume.ai).

## How billing works

**Hume uses two billing models:**

| Billing model | Applies to | How charges work |
| --- | --- | --- |
| Subscription | TTS, EVI, and Voice features | One subscription includes all three. Each plan has included usage. Overage rates apply after you exceed<br>included usage. |

New accounts start on the **free tier** with **$20 in credits**.

### Subscriptions

Your subscription includes access to [Text-to-Speech (TTS)](https://dev.hume.ai/docs/text-to-speech-tts/overview), [Speech-to-Speech (EVI)](https://dev.hume.ai/docs/speech-to-speech-evi/overview), and [Voice features](https://dev.hume.ai/docs/voice/overview). There is **no** **separate pricing** for TTS, EVI, or Voice features.

- **Start or change a plan** in the [billing portal](https://app.hume.ai/billing).
- Your **billing cycle starts the day you begin a paid subscription** and renews monthly on that same calendar day.
- **Included usage** and plan limits reset at the start of each cycle
- **Upgrades take effect immediately**; downgrades take effect at the next renewal
- **Overage billing** applies when you exceed included usage; see plan rates at our [pricing page](/content/pricing/index.html)

**External LLM usage with EVI**

- Using **Hume managed external LLMs** adds supplemental usage to your bill.
- If you **use your own LLM API key or a custom language model**, Hume **does not charge** for that LLM usage.

## Charges and Invoices

- **Subscription renewals** are charged on your monthly renewal date
- **Additional usage** is charged each time you accrue $44 of usage; to change this threshold, email [billing@hume.ai](mailto:billing@hume.ai)
- You receive an **email receipt** for successful charges and **invoice PDFs** are available in the Platform.

If payment fails, we will notify you and may pause API access until the outstanding balance is settled.

## Manage billing

**Go to Billing in the Platform: [app.hume.ai/billing](https://app.hume.ai/billing)**

- View usage and renewal date
- Update payment methods
- Download invoices
- Change plans

**If you have questions, contact [billing@hume.ai](mailto:billing@hume.ai).**

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