> ## Documentation Index
> Fetch the complete documentation index at: https://docs.flexprice.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Flat fee
The **Flat Fee** model charges a consistent rate for each unit of usage. This straightforward approach ensures predictability for both the business and the customer.
**Example:**
An API service charges **\$0.05 per API call**. If a customer makes **1,000 API calls** during a billing period, their total charge would be:
`1,000 API calls × $0.05 = $50`
This model is ideal when the cost per unit remains constant, regardless of the total usage volume.
