> ## Documentation Index
> Fetch the complete documentation index at: https://heygen-1fa696a7.mintlify.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Enterprise Billing — Dollar-Based

> Buy HeyGen API capacity in dollars, not credits. Enterprise dollar-based billing lets your team forecast spend across avatars, video agent, translation, and.

| Model               | How It Works                                                | Best For                                                      |
| ------------------- | ----------------------------------------------------------- | ------------------------------------------------------------- |
| Usage-Based Billing | Monthly Minimum Commitment (MMC) with overage billing       | Teams with predictable, recurring API usage                   |
| Dollar Packages     | Purchase an annual pool of dollars upfront under a contract | Teams that prefer a fixed annual spend with flexible drawdown |

Both models authenticate with an **API Key** (`x-api-key` header). Check your balance at any time with `GET /v3/users/me → wallet`.

## Usage-Based Billing

Usage-based billing pairs a flat Monthly Minimum Commitment (MMC) with per-second usage billing. If you exceed the included usage in a given month, overage is billed at a slightly higher rate.

### How It Works

1. **Monthly Minimum Commitment (MMC):** A flat fee charged monthly, regardless of usage.
2. **Included Usage:** Each tier includes a pool of usage dollars per month at your contracted rate.
3. **Overage:** Usage beyond the included pool is billed at the overage rate per second.

For pricing details and available tiers, [contact our sales team](https://www.heygen.com/contact-sales).

## Dollar Packages

Dollar packages let you purchase a fixed annual pool of dollars under a contract. Your balance is drawn down as you use the API throughout the year.

### How It Works

1. **Annual Contract:** You agree to a total dollar amount for the contract term (typically 12 months).
2. **Drawdown:** Your balance is consumed per second as you use HeyGen's API.
3. **Balance Tracking:** Monitor your remaining balance at any time via `GET /v3/users/me → wallet`.

For packaging options and contract terms, [contact our sales team](https://www.heygen.com/contact-sales).