Understanding 95th-percentile billing

IP transit is billed on the 95th percentile of your traffic rather than peak or average. Here's how it works.

Every five minutes we record your inbound and outbound throughput. At the end of the month we take all the samples for each direction, sort them, and discard the highest 5%. The value at the 95th percentile is your billable rate.

This means short spikes — a backup job, a traffic burst — don't blow up your bill, because roughly 36 hours' worth of the busiest five-minute samples are excluded. You're charged on the higher of your inbound and outbound 95th-percentile figures, subject to your committed minimum.