> ## Documentation Index
> Fetch the complete documentation index at: https://docs.smokeball.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Expenses

[**@smokeballdev/smokeball-client-sdk**](./../../../../README)

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# Interface: Expense

The expense entity from Smokeball.

## Properties

### activityCode

> **activityCode**: `string`

Activity code for the expense

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### description?

> `optional` **description**: `string`

Detailed description of the expense

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### expenseDate

> **expenseDate**: `string`

Date of the expense

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### finalized

> **finalized**: `boolean`

Whether expense is finalized

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### id

> **id**: `string`

Expense id

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### invoiceId

> **invoiceId**: `string`

Associated invoice ID

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### isBillable

> **isBillable**: `boolean`

Whether expense is billable

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### isInvoicedExternally

> **isInvoicedExternally**: `boolean`

Whether expense is invoiced externally

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### isWrittenOff

> **isWrittenOff**: `boolean`

Whether expense is written off

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### origin

> **origin**: `string`

Where the expense originated from

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### outputTax?

> `optional` **outputTax**: `number`

Output tax amount in dollars

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### price

> **price**: `number`

Price of the expense in dollars

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### quantity

> **quantity**: `number`

Quantity of the expense in units

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### staffId

> **staffId**: `string`

Associated staff member ID

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### subject

> **subject**: `string`

Short description of the expense

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### tax?

> `optional` **tax**: `number`

GST amount in dollars (AU only)

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### taxExempt

> **taxExempt**: `boolean`

Whether tax is exempt

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### taxInclusive

> **taxInclusive**: `boolean`

Whether amount is GST inclusive (AU only)

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### taxOutOfScope

> **taxOutOfScope**: `boolean`

Whether tax is out of scope

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### taxZeroRated

> **taxZeroRated**: `boolean`

Whether tax is zero rated

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### updatedByUserId

> **updatedByUserId**: `string`

ID of user who last updated the expense