---
title: "Adds a expense category"
method: POST
path: "/api/v1/expense_categories"
tags: ["expense_categories"]
---

# Adds a expense category

`POST /api/v1/expense_categories`

## Request

- Base URL: `https://demo.invoiceninja.com`
- URL: `https://demo.invoiceninja.com/api/v1/expense_categories`
- Auth: none declared. Required headers: `X-API-TOKEN`, `X-Requested-With`
- TypeScript: <https://skmtc.dev/invoiceninja/apis/invoice-ninja-api-reference/docs/api/v1/expense_categories/post.ts> (a function with typed inputs; its response is checked against the schema)

Adds an expense category to the system

## Query parameters

- `include` string

## Headers

- `X-API-TOKEN` string, required
- `X-Requested-With` string, required

## Response `200`

Returns the saved invoice object

- ExpenseCategory
  - `id` string: The expense hashed id
  - `name` string: The expense category name
  - `user_id` string: The user hashed id
  - `is_deleted` boolean: Flag determining whether the expense category has been deleted
  - `updated_at` integer: The updated at timestamp
  - `created_at` integer: The created at timestamp

## Other responses

- `401`: Authentication error
- `403`: Authorization error
- `422`: Validation error
- `default`: Unexpected Error

## Changes

- **2026-04-20** `69a36036d334`: 1 info
  - the response optional property `id` became read-only for the status `200`
- **2024-06-06** `8e82a2bd77e0`: 1 breaking, 2 info
  - the response's body type changed from no type to `object` for status `default`
  - added the optional property `code` to the response with the `default` status
  - added the optional property `message` to the response with the `default` status
- **2024-06-05** `e61df65649e2`: 1 breaking, 2 warning
  - the response's body type changed from `object` to no type for status `default`
  - removed the optional property `code` from the response with the `default` status
  - removed the optional property `message` from the response with the `default` status
- **2024-03-07** `71171a40d629`: 5 breaking, 13 info
  - the response's body type changed from no type to `object` for status `200`
  - the response's body type changed from no type to `object` for status `401`
  - the response's body type changed from no type to `object` for status `403`
  - the response's body type changed from no type to `object` for status `422`
  - …14 more
- **2024-02-18** `88bbc1f38ff7`: 5 breaking, 13 warning
  - the response's body type changed from `object` to no type for status `200`
  - the response's body type changed from `object` to no type for status `401`
  - the response's body type changed from `object` to no type for status `403`
  - the response's body type changed from `object` to no type for status `422`
  - …14 more

[Operation history](https://skmtc.dev/invoiceninja/apis/invoice-ninja-api-reference/changes/api/v1/expense_categories/post.md)

---

[API](https://skmtc.dev/invoiceninja/apis/invoice-ninja-api-reference.md) - [All operations](https://skmtc.dev/invoiceninja/apis/invoice-ninja-api-reference/llms.txt) - [OpenAPI document](https://skmtc.dev/invoiceninja/apis/invoice-ninja-api-reference/revisions/bcda1f823746?raw)