Accounting & taxes

Record an expense and charge it on

From a supplier receipt to a line on your customer's invoice.

Last updated 22 September 2026 · More in Accounting & taxes

An expense you paid on a customer's behalf is worth money only if it reaches their invoice. IDup keeps the link so it does.

Where to find itFinance → Expenses.

Step by step

  1. Add the expense with supplier, date, amount, tax and category, and attach the receipt.
  2. Set the customer it belongs to, and mark it billable.
  3. If it relates to a project, set the project as well — it then shows in the project's cost figures.
  4. When you next invoice that customer, the billable expense is offered as a line. Add it and it is marked as invoiced, so it cannot be charged twice.
  5. Recurring costs — rent, subscriptions, insurance — can be set to repeat rather than re-entered.

Categories are worth 10 minutes

Expense categories decide where a cost lands in your accounts and therefore what your reports say. Set them up once under the expense category list, using the accounts your accountant expects, and every later booking is filed correctly without a decision.

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