---
title: "Form Company"
method: POST
path: "/accounts/{id}/form_company"
tags: ["Accounts"]
---

# Form Company

`POST /accounts/{id}/form_company`

Starts an LLC or C-Corp formation for a business account. Defaults to an LLC; set `entity_type` to `c_corp` to form a C-Corp, which additionally requires `share_structure` and officer `roles` on every founder. On submission, the application is validated and the response returns a hosted checkout URL. Once paid, the filing is submitted. Track progress through the account's [`company_formation`](/api-reference/beta/accounts/retrieve-account) field on Retrieve Account.

## Headers

- `Idempotency-Key` string

## Request body

- object
  - `business_address` object — Company mailing address. Required unless `use_registered_agent` is `true`.
    - `city` string, required
    - `country` string, required — Two-letter ISO 3166-1 country code, for example `US`.
    - `line1` string, required — First line of the street address.
    - `line2` string — Second line of the street address.
    - `postal_code` string, required — Postal or ZIP code.
    - `state` string, required — State or region code, for example `CA`.
  - `business_name` string, required — Legal name for the new company.
  - `business_phone` string — Business phone number in E.164 format, for example `+12125550100`. Required unless `use_registered_agent` is `true`.
  - `business_type` string, required — High-level business category, from the Whop business taxonomy. Valid values are listed on [business types and industries glossary](/api-reference/beta/accounts/account#business-types-and-industries-glossary).
  - `business_website` string — Company website URL.
  - `entity_suffix` 'LLC' | 'L.L.C' | 'L.L.C.' | 'Limited Liability Company' | 'Inc' | 'Inc.' | 'Incorporated' | 'Corp.' | 'Corporation' | 'C Corp' | 'C Corporation' | 'CCorp' | 'Company' — Legal entity ending appended to `business_name`. LLC formations accept `LLC`, `L.L.C`, `L.L.C.` or `Limited Liability Company` and default to `LLC`; C-Corp formations accept `Inc`, `Inc.`, `Incorporated`, `Corp.`, `Corporation`, `C Corp`, `C Corporation`, `CCorp` or `Company` and default to `Inc.`. Unrecognized values fall back to the default for the entity type.
  - `entity_type` 'llc' | 'c_corp' — Legal entity type to form. Defaults to `llc`.
  - `expedite_ein` boolean — Request expedited EIN processing for an additional fee. Available only when no founder supplies an SSN.
  - `formation_state` 'AL' | 'AK' | 'AZ' | 'AR' | 'CA' | 'CO' | 'CT' | 'DE' | 'DC' | 'FL' | 'GA' | 'HI' | 'ID' | 'IL' | 'IN' | 'IA' | 'KS' | 'KY' | 'LA' | 'ME' | 'MD' | 'MA' | 'MI' | 'MN' | 'MS' | 'MO' | 'MT' | 'NE' | 'NV' | 'NH' | 'NJ' | 'NM' | 'NY' | 'NC' | 'ND' | 'OH' | 'OK' | 'OR' | 'PA' | 'RI' | 'SC' | 'SD' | 'TN' | 'TX' | 'UT' | 'VT' | 'VA' | 'WA' | 'WV' | 'WI' | 'WY', required — Two-letter code of the US state (or `DC`) to form the company in.
  - `founders` object[], required — The company's founders. Exactly one must be marked `is_primary` — the responsible party for the filing.
    - `address` object, required — Founder's personal address.
      - `city` string, required
      - `country` string, required — Two-letter ISO 3166-1 country code, for example `US`.
      - `line1` string, required — First line of the street address.
      - `line2` string — Second line of the street address.
      - `postal_code` string, required — Postal or ZIP code.
      - `state` string, required — State or region code, for example `CA`.
    - `date_of_birth` string — Formatted as `YYYY-MM-DD`.
    - `email` string, required
    - `first_name` string, required
    - `is_primary` boolean, required — Marks the responsible party for the filing. Exactly one founder must be primary.
    - `last_name` string, required
    - `ownership_percentage` number — The founder's ownership share: greater than `0`, at most `100`. Shares across founders must total `100`. Required when `entity_type` is `llc`; ignored for C-Corps.
    - `phone` string, required — Phone number in E.164 format, for example `+12125550100`.
    - `roles` string[] — Officer roles held by the member — one member can hold several. Required (at least one role) for every member when `entity_type` is `c_corp`; ignored for LLCs. Across all members every role must be covered; `president`, `secretary` and `treasurer` may each be held by only one member, while `director` may repeat.
    - `ssn` string — The founder's US Social Security Number. Leave empty if the founder is not a US resident. Non-US founders can request expedited EIN processing via the `expedite_ein` option.
  - `industry_group` string, required — Industry group, from the Whop business taxonomy. Valid values are listed on [business types and industries glossary](/api-reference/beta/accounts/account#business-types-and-industries-glossary).
  - `industry_type` string, required — Specific industry vertical, from the Whop business taxonomy. Valid values are listed on [business types and industries glossary](/api-reference/beta/accounts/account#business-types-and-industries-glossary).
  - `share_structure` object — Authorized share structure. Required when `entity_type` is `c_corp`; ignored for LLCs.
    - `number_of_shares` integer, required — Number of shares the company authorizes. Must be greater than `0`.
    - `value` number, required — Par value per share, in USD. Must be greater than `0`; fractional values like `0.01` are allowed.
  - `use_registered_agent` boolean — Use the registered agent's address as the company address instead of `business_address`.

## Response `200`

application accepted and checkout created

- object
  - `checkout_session_id` string, required — Checkout session ID, prefixed `ch_`.
  - `checkout_url` string, required — Hosted checkout URL. Send the buyer here to pay for the formation; the filing is submitted once payment completes.
  - `currency` string, required — Always `usd`.
  - `total` integer, required — Total due at checkout in USD cents.

## Other responses

- `400` — Invalid Parameters
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Resource not found
- `409` — Conflict

---

[API](https://skmtc.net/whop/apis/whop-api.md) · [All operations](https://skmtc.net/whop/apis/whop-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/whop/whop-api/revisions/c363cb2feb95/schema)