# Aggregated Burstable 95th

You use first and pay afterward by month. If you have a base commit rate, you need to pay that part first. The system samples the peak bandwidth of all your instances in one bandwidth cluster of a city each month, and discard the top 5% of the samples. The highest value left is taken as the billable bandwidth.

{% hint style="info" %} <mark style="color:blue;">**Note**</mark>

<mark style="color:blue;">For this kind of network billing method, the instances calculated in a bandwidth cluster are located in only one city.</mark>

<mark style="color:blue;">Please distinguish from the</mark> [<mark style="color:purple;">**Regional Aggregated Burstable 95th**</mark>](https://docs.console.zenlayer.com/welcome/pricing/network-billing/regional-aggregated-burstable-95th)<mark style="color:blue;">. The instances with this kind of billing method are located in a more broad region, covering several cities usually.</mark>
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<table data-full-width="false"><thead><tr><th width="179.33333333333331">Billing Model</th><th width="240">Billing Item</th><th>Description</th><th data-hidden>Example</th></tr></thead><tbody><tr><td>Burstable 95th with commitment</td><td>95th percentile bandwidth usage of all instances in one bandwidth cluster</td><td>You pay the bandwidth commitment first and usage exceeded the base commit rate will be post paid by Mbps.</td><td></td></tr></tbody></table>

{% hint style="info" %} <mark style="color:blue;">**Note**</mark>

<mark style="color:blue;">You will not be billed for a bandwidth cluster if no instances are added in.</mark>
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