Delinquency
Money billed and not collected, and how overdue it is.
Delinquency is the balance that has been invoiced and not paid, usually reported by how long it has been outstanding — thirty, sixty, ninety days.
For parking specifically it is worth tracking separately from other dues, because the lever is different: a parking balance is attached to a space and a permit, both of which can be suspended, which makes it one of the few charges a residential property can actually enforce without going to a collections agency.
See also
- Proration — Charging for part of a billing period rather than all of it.
- Ancillary revenue — Income from services beside the rent — parking, storage, pets.
Parking, handled.
Permits, guest passes, enforcement, contracts and monthly billing for the building you actually manage.