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# How can I attach my expenses to an invoice?

When you’re working on an official project, you might incur an expense on behalf of the customer. You can attach the expenses to an invoice if your customer has agreed to pay for your expenses such as labor costs, travel expense..,etc.

**Prerequisite:** Mark your expenses as billable to associate the expense to an invoice.

To attach expenses to an invoice:

*   Click **Sales** in the left sidebar.
*   Select **Invoices** from the dropdown.
*   Click **\+ New** in the top right corner.
*   Select the customer from whom you’ve incurred the expense.
*   Click **unbilled expense** below the item table.
*   Select the expenses you want to associate with the invoice.
*   Click **Add**.

You can add up to 200 expenses to an invoice.