I just noticed recently that Nuno, our Oxygen Icons superhero, drawn some icons for KDE financial apps. This is a first result to some work we performed with the other KDE Financial guys during last year's Sprint in Frankfurt. So, first things first, thanks Nuno for working on this :).
These are the icons I could spot that are directly finance related (I may have skipped some)
I used some of them in Skrooge to see how it looks, and here is the result (in the dock on the left):
I might not have used them as the name suggest, as some of them are not directly applicable to Skrooge. For example I used view-incomes-category for budget: we don't need an icon for income categories (but we need one for categories, regardless of income of expenses notions), and the visual seemed to fit quite well with the budget concept. At least, it works for me...
Constructive feedback appreciated :)
(On a side note, you are also looking at the current state of the plasma-based dashboard, that should be available somewhen in the future)