I suggest the add of a new custom tag type, for Tasks (not for Working units) which allows to mark the task as paid.
The new tag "does not propagate" to the Work units, as it's useful to keep track whenever a Task is completed and paid. Then the new custom tag can allow the user to enter the paid date.
I use WorkingHours in combination with SubTotal, which allows me to mark an invoice as paid, very nice.
Meanwhile, in WorkingHours, it would be very useful to mark the tasks as paid (which I can do even now, with the normal tag system, adding "paid" tag) but with the possibility to add the paid date, so that it's easy, later on, to associate incomes and bank transfers to each task.
And then, it's not useful to propagate the pay status (paid - not paid) to the Work units, but it's useful to see it in the tasks.
Maybe I'm not the only one interested in this feature. In case, you may think about it.
Thanks, Greg
WorkingHours version: 2.10.26
Operating system: iOS and macOS
Device model: MacBook Pro