---
title: "Update an invoice line item"
method: PATCH
path: "/v1/finance/invoices/{invoiceId}/lineItems/{lineItemId}"
tags: ["Invoices"]
---

# Update an invoice line item

`PATCH /v1/finance/invoices/{invoiceId}/lineItems/{lineItemId}`

## Request

- Base URL: `https://api.bigchange.com`
- URL: `https://api.bigchange.com/v1/finance/invoices/{invoiceId}/lineItems/{lineItemId}`
- Auth: HTTP bearer

Update the details of a single line item (required scope finance:write)

## Path parameters

- `invoiceId` integer, required
- `lineItemId` integer, required

## Headers

- `Customer-Id` integer, required

## Request body

- UpdateInvoiceLineItemModel: represents a model for updating an invoice line item
  - `quantity` number, double: The quantity of the invoice line item<br/><br/>Optional: Omit to retain current value
  - `description` string: Description of the invoice line item<br/><br/>Optional: Omit to retain current value
  - `taxId` integer, nullable: Tax identifier (must exist and not be deleted for customer). Nullable<br/><br/>Optional: Omit to retain current value or provide null to unset
  - `unitCost` number, double, nullable: Unit cost (nullable, non-negative)<br/><br/>Optional: Omit to retain current value or provide null to unset
  - `unitSellingPrice` number, double: Unit selling price (non-negative)<br/><br/>Optional: Omit to retain current value
  - `nominalCodeId` integer, nullable: Nominal code identifier (must exist and not be deleted for customer)<br/><br/>Optional: Omit to retain current value or provide null to unset
  - `departmentCodeId` integer, nullable: Department code identifier (must exist and not be deleted for customer)<br/><br/>Optional: Omit to retain current value or provide null to unset

## Response `204`

No Content

## Other responses

- `400`: Bad Request
- `403`: Forbidden
- `404`: Not Found
- `422`: Unprocessable Content
- `500`: Internal Server Error

---

[API](https://skmtc.dev/bigchange/apis/bigchange-dx.md) - [All operations](https://skmtc.dev/bigchange/apis/bigchange-dx/llms.txt) - [OpenAPI document](https://skmtc.dev/bigchange/apis/bigchange-dx/revisions/b262bfdb1dd0?raw)