> ## Documentation Index
> Fetch the complete documentation index at: https://docs.plude.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Fee

> The fee price model is the simplest and most common in subscription businesses. Customers such as Netflix and Shopify apply this pricing model.

Selecting this price model allow you to define a **fixed fee** price, a **per-seat** price or combine both.
The *fee* price model allow setting `feeAmount`, `unitAmount` or both.

## Fee amount

By setting the fee amount, any *quantity* which is not 0, will result in application of the `feeAmount` amount.

**Example: settings `feeAmount` to 15000 USD**

| quantity | calculation |     result |
| :------- | :---------- | ---------: |
| 10       | 1 x 15000   |  15000 USD |
| 0        | 0 x 15000   |      0 USD |
| 90       | 1 x 15000   |  15000 USD |
| -40      | -1 x 15000  | -15000 USD |

Hint: When creating a `price`, a request body may be as follows:

```json theme={null}
...
"priceModel": "fee",
"pricing": {
    "usd": {
        "unitAmount": 0,
        "feeAmount": 15000
    }
}
...
```

## Unit amount

By setting the unit amount, quantity will resulting in application of `unitAmount` x `quantity`.

**Example: setting `unitAmount` to 4500 USD**

| quantity | calculation |      result |
| :------- | :---------- | ----------: |
| 10       | 10 x 4500   |   45000 USD |
| 0        | 0 x 4500    |       0 USD |
| 90       | 90 x 4500   |  405000 USD |
| -40      | -40 x 4500  | -180000 USD |

Hint: When creating a `price`, a request body may be as follows:

```json theme={null}
...
"priceModel": "fee",
"pricing": {
    "usd": {
        "unitAmount": 4500,
        "feeAmount": 0
    }
}
...
```

## Both fee and unit

By setting both parameters, quantity will result in a combined price.

**Example: setting `unitAmount` to 4500 USD and `feeAmount` to 10000 USD**

| quantity | calculation         |    result |
| :------- | :------------------ | --------: |
| 10       | (10 x 4500) + 10000 | 45000 USD |
| 0        | (0 x 4500) + 0      |     0 USD |

Hint: When creating a `price`, a request body may be as follows:

```json theme={null}
...
"priceModel": "fee",
"pricing": {
    "usd": {
        "unitAmount": 4500,
        "feeAmount": 10000
    }
}
...
```

<Note>
  It's important to note, that a combination will still only produce one (1) **invoice line**.
</Note>