> ## Documentation Index
> Fetch the complete documentation index at: https://rain-sandbox-trial.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Industry Codes (KYB)

> How to classify a business with a NAICS industry code when creating a corporate application, including the two-tier selection and code format.

When creating corporate applications, you must provide an industry code that classifies the business. Rain uses NAICS (North American Industry Classification System) codes for this purpose.

Both 2017 and 2022 NAICS classification versions are supported.

## How it works

Industry selection uses a two-tier system:

1. **Major industry:** select from one of 20 broad industry categories.
2. **Specific industry:** choose a specific industry within that category.

The final `industry` value is a 6-digit NAICS code that identifies the business type.

The API validates `industry` against Rain's accepted NAICS list and returns a `400` for any other value. The industry's title (for example, `Soybean Farming`) is also accepted in place of the code, but titles are capped at 50 characters in the accepted list, so send the code. The field is optional: an application without it is accepted, but Rain recommends sending it.

## Major industry categories

Select from one of these 20 major categories:

| Code  | Category                                         |
| ----- | ------------------------------------------------ |
| 11    | Agriculture, Forestry, Fishing and Hunting       |
| 21    | Mining, Quarrying, and Oil and Gas Extraction    |
| 22    | Utilities                                        |
| 23    | Construction                                     |
| 31-33 | Manufacturing                                    |
| 42    | Wholesale Trade                                  |
| 44-45 | Retail Trade                                     |
| 48-49 | Transportation and Warehousing                   |
| 51    | Information                                      |
| 52    | Finance and Insurance                            |
| 53    | Real Estate and Rental and Leasing               |
| 54    | Professional, Scientific, and Technical Services |
| 55    | Management of Companies and Enterprises          |
| 56    | Administrative and Support and Waste Management  |
| 61    | Educational Services                             |
| 62    | Health Care and Social Assistance                |
| 71    | Arts, Entertainment, and Recreation              |
| 72    | Accommodation and Food Services                  |
| 81    | Other Services (except Public Administration)    |
| 92    | Public Administration                            |

## NAICS code format

NAICS codes are 6-digit numbers where:

* The first 2 digits identify the major industry sector
* The remaining digits provide increasing specificity

For example, within the Agriculture, Forestry, Fishing and Hunting sector (11):

* `111110`: Soybean Farming
* `111140`: Wheat Farming
* `111310`: Orange Groves

For the full list of NAICS codes, refer to the [official NAICS website](https://www.census.gov/naics/).

## What's next

<Columns cols={2}>
  <Card title="Occupation codes (KYC)" icon="briefcase" href="/docs/occupation-codes">
    The consumer-side code for the occupation field.
  </Card>

  <Card title="Verification requirements" icon="shield-check" href="/docs/verification-requirements">
    What a business application requires.
  </Card>
</Columns>