# ProductType

A model the API reference uses in a request or a response. The operation pages link every field typed as this model here.

Classifies the nature of a product for invoicing, tax, and accounting purposes.

## Values

| Value | Description |
| --- | --- |
| `Physical` | Physical goods that are shipped or delivered. |
| `Service` | Professional or managed services billed by time or engagement. |
| `Digital` | Digital goods such as software licenses, downloads, or subscriptions. |
| `Fee` | Flat fees such as setup charges, late fees, or surcharges. |
| `Discount` | Discount line items that reduce the invoice total. |

## See also

- [All documentation](https://devportal.demo.winkpg.io/llms.txt): the machine-readable index of every public page on this site.