At Upflow, we consider outstanding invoices to be at-risk when they are 90-days past due. After that, the probability of getting paid drastically decreases, and you need to prepare for some write-off. It's therefore really important to closely monitor the invoices that venture into this danger zone.
On your dashboard, you will be able to see the at-risk rate which is the percentage of your billed invoices in a given month that is left unpaid after 90 days.
This graph is actually a reversed measure of the paid <90 days column of your billing cohorts.
Any questions about this graph? Please let us know.