{"id":25213,"date":"2026-11-08T12:16:01","date_gmt":"2026-11-08T12:16:01","guid":{"rendered":"https:\/\/atalnetworks.com\/?p=25213"},"modified":"2026-11-08T12:16:01","modified_gmt":"2026-11-08T12:16:01","slug":"95th-percentile-vs-unmetered-bandwidth","status":"publish","type":"post","link":"https:\/\/atalnetworks.com\/fr\/95th-percentile-vs-unmetered-bandwidth\/","title":{"rendered":"95th-Percentile Billing vs Unmetered Bandwidth: Which Costs Less?"},"content":{"rendered":"

Three servers can each transfer 64.8 TB in a month and pay $150, $250, or $1,150 under the same 95th-percentile contract. A flat-rate unmetered plan costs $300 in all three examples. The difference comes from how long each server runs at higher speeds.<\/span><\/p>\n

95th-percentile billing costs less when your measured rate stays below the break-even point for the two quotes. Unmetered bandwidth costs less when percentile charges exceed the flat monthly price.<\/b> Check that both plans can carry your peak traffic before you compare prices.<\/span><\/p>\n\n\n\n\n\n\n\n\n
What to compare<\/b><\/th>\n95th-percentile billing<\/b><\/th>\nFlat-rate unmetered bandwidth<\/b><\/th>\n<\/tr>\n<\/thead>\n
What sets the bandwidth bill<\/span><\/td>\nThe measured rate, the minimum commit, and any overage<\/span><\/td>\nThe quoted monthly bandwidth fee<\/span><\/td>\n<\/tr>\n
What can change the bill<\/span><\/td>\nSustained peaks, traffic direction, and how the provider combines samples<\/span><\/td>\nA change to the plan, port, or other billed services<\/span><\/td>\n<\/tr>\n
Where it can cost less<\/span><\/td>\nA low baseline with brief bursts, or steady traffic below break-even<\/span><\/td>\nSustained or recurring usage above break-even<\/span><\/td>\n<\/tr>\n
What limits throughput<\/span><\/td>\nThe port speed and any burst limit<\/span><\/td>\nThe port speed, available capacity, and service terms<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

How does 95th-percentile billing work?<\/span><\/h2>\n

In a common billing model, the provider measures your average traffic rate every five minutes. At the end of the billing period, it removes the highest 5% of readings. The highest remaining reading is your <\/span>measured 95th-percentile rate<\/b>. Your contract uses that rate to calculate the charge. <\/span>Cloudflare WAN bandwidth measurement<\/span><\/a><\/p>\n

For a complete 30-day cycle with one valid reading every five minutes:<\/span><\/p>\n

    \n
  1. Collect 8,640 readings.<\/span><\/li>\n
  2. Sort the readings from highest to lowest.<\/span><\/li>\n
  3. Remove the first 432 readings.<\/span><\/li>\n
  4. Use the 433rd reading in the original list as the measured rate.<\/span><\/li>\n<\/ol>\n

    A <\/span>bandwidth commit<\/b> is the rate you agree to pay for under a commit-and-overage contract. If you commit to 100 Mbps and measure 80 Mbps, you still pay the minimum. If you measure 140 Mbps, the provider charges for 40 Mbps of overage under that model. The port and service terms set how high you can burst. <\/span>NoBull Networks billing comparison<\/span><\/a><\/p>\n

    Which traffic does the provider count?<\/span><\/h3>\n

    Ask whether the provider counts outbound traffic only, takes the higher direction in each interval, calculates each direction separately and takes the higher result, or adds the two directions. Inbound traffic enters your connection. Outbound traffic leaves it. Provider rules differ by service. <\/span>Cloudflare WAN measurement<\/span><\/a> \u00b7 <\/span>BytePlus bandwidth package billing<\/span><\/a><\/p>\n

    The order matters. Suppose inbound traffic jumps during 4% of the intervals. Outbound traffic jumps during a different 4%. Calculating a percentile for each direction can remove both sets of spikes from their respective lists. Taking the higher rate in each interval first puts high readings in 8% of one list. Some high readings then remain after the discard.<\/span><\/p>\n

    The same issue applies to multiple ports. If your contract pools ports, combine the rates for each matching timestamp before sorting. If it bills ports separately, calculate each port under its own rules. Adding individual port percentiles can give a different result from calculating the percentile of the combined traffic. <\/span>Ingenuity Cloud Services bandwidth pooling<\/span><\/a><\/p>\n

    What happens when bursts last longer than 5% of the month?<\/span><\/h3>\n

    In the 30-day example, 432 readings represent 36 hours of five-minute intervals. Those readings can come from several days. The provider removes the highest readings across the full cycle.<\/span><\/p>\n

    Suppose your baseline is 100 Mbps and every high reading is 1,000 Mbps. With 432 high readings, the measured rate stays at 100 Mbps. With 433 high readings, one high reading remains. The measured rate rises to 1,000 Mbps. Under the sample prices below, the bandwidth bill rises from <\/span>$150 to $1,050<\/b>.<\/span><\/p>\n

    Ask how your provider rounds the discard count and treats missing readings, partial months, and the billing time zone. If your bursts start or end within a five-minute interval, the recorded average can differ from the burst rate.<\/span><\/p>\n

    What does unmetered bandwidth include?<\/span><\/h2>\n

    On a flat-rate unmetered plan, you pay a fixed bandwidth fee for the service described in your quote. The quote and service terms define the port speed, any guaranteed rate, and any fair-use or traffic-shaping rules. Check whether the port or upstream capacity is shared and what throughput the provider commits to. A 10Gbps port gives you the port\u2019s rated speed. A throughput guarantee requires its own terms. <\/span>How to choose a 10Gbps dedicated server<\/span><\/a><\/p>\n

    A plan with a monthly TB allowance uses a third billing model. The provider counts transfer volume against that allowance. If your quote includes a TB allowance, use a volume-based comparison alongside the two models here. <\/span>10Gbps with 100TB vs unmetered<\/span><\/a><\/p>\n

    Same 64.8 TB, three different bandwidth bills<\/span><\/h2>\n

    We use two sample plans with 10Gbps ports. Both ports can carry the rates shown. The prices are illustrative. Common server fees, taxes, and other charges are excluded from both columns.<\/span><\/p>\n