Thank you for posting here in Community, @Elizabeth 1.

As for now, the only way to add a markup to an estimate is to enter an additional line item. But this is a great suggestion, rest assured that this will be escalated to our developers to have another way of adding % markup.

In the meantime, you can follow the steps above given by my colleague HoneyLynn_G on adding a markup.

For your future reference, click the article on how to enter a billable expense. Enter billable expenses.

Feel free to fill me in if there’s anything else you need, I’ll be glad to help. Have a good day!