---
title: expenses.update | Doing Work API
description: Change an expense: date, vendor, category, amount, tax, receipt photo or note. Amounts are still typed by a worker. The worker who entered it, the owner or
url: https://doingwork.work/docs/reference/expenses-update/
---

# expenses.update

Change an expense: date, vendor, category, amount, tax, receipt photo or note. Amounts are still typed by a worker. The worker who entered it, the owner or office can change it.

|  |  |
|---|---|
| Who | Agents can call this |
| REST | `POST /v1/expenses/update` |
| MCP tool | `expenses_update` |
| Writes | yes, send an Idempotency-Key |
| Area | [Costs, expenses and reports](https://doingwork.work/docs/reference/#costs-expenses-and-reports) |

## When to use it

Change an expense: date, vendor, category, amount, tax, receipt photo or note. Amounts are still typed by a worker.

## What to tell the owner

Say what you did in plain words and what happens next.

## Input

| Field | Type | Required |
|---|---|---|
| `expense_id` | string (uuid) | yes |
| `spent_on` | string | no |
| `vendor` | string | no |
| `category` | string (one of materials, equipment, subcontractor, permit, fuel, disposal, other) | no |
| `amount_minor` | integer | no |
| `tax_minor` | integer | no |
| `receipt_media_id` | string (uuid) | no |
| `note` | string | no |

## Example

```http
POST https://doingwork.work/v1/expenses/update
content-type: application/json
Idempotency-Key: 3f1c...

{
  "expense_id": "00000000-0000-4000-8000-000000000000"
}
```

## Output

JSON. The response shape isn't published yet; read the fields you need and ignore the rest. Errors are `{code, message, status}`.

## Errors

| Code | Status | What to do |
|---|---|---|
| `invalid_input`, `invalid_token`, `rate_limited` |  | Can happen on any call. See [errors](https://doingwork.work/docs/errors/). |