Prior Version(s) of AWS Transit Gateway Service Level Agreement – Not Currently In Effect

Last Updated: March 19, 2019

This AWS Transit Gateway Service Level Agreement (this "SLA") is a policy governing the use of AWS Transit Gateway ("Transit Gateway") and applies separately to each account using Transit Gateway. In the event of a conflict between the terms of this SLA and the terms of the AWS Customer Agreement or other agreement with us governing your use of our Services (the "Agreement"), the terms and conditions of this SLA apply, but only to the extent of such conflict. Capitalized terms used herein but not defined herein shall have the meanings set forth in the Agreement.

Service Commitment

AWS will use commercially reasonable efforts to make each Transit Gateway available with a Monthly Uptime Percentage, during any montly billing cycle, of at least 99.95% (the "Service Commitment"). In the event a Transit Gateway does not meet the Service Commitment, you will be eligible to receive a Service Credit as described below.

Service Credits

Service Credits are calculated as a percentage of the total charges paid by you for the applicable Transit Gateway for which the Monthly Uptime Percentage fell within the ranges set forth in the table below:

Monthly Uptime Percentage Service Credit Percentage
Less than 99.95% but greater than or equal to 99.0% 10%
Less than 99.0% but greater than or equal to 95.0% 25%
Less than 95.0% 100%

We will apply any Service Credits only against future Transit Gateway payments otherwise due from you. At our discretion, we may issue the Service Credit to the credit card you used to pay for the billing cycle in which the Unavailability occurred. Service Credits will not entitle you to any refund or other payment from AWS. A Service Credit will be applicable and issued only if the credit amount for the applicable monthly billing cycle is greater than one dollar ($1 USD). Service Credits may not be transferred or applied to any other account. Unless otherwise provided in the Agreement, your sole and exclusive remedy for any unavailability, non-performance, or other failure by us to provide Transit Gateway is the receipt of a Service Credit (if eligible) in accordance with the terms of this SLA.

Credit Request and Payment Procedures

To receive a Service Credit, you must submit a claim by opening a case in the AWS Support Center. To be eligible, the credit request must be received by us by the end of the second billing cycle after which the incident occurred and must include:

  1. the words “SLA Credit Request” in the subject line;
  2. the dates and times of each Unavailability incident that you are claiming;
  3. the affected Transit Gateway ARNs and Transit Gateway attachment ID.
  4. the billing cycle and AWS regions with respect to which you are claiming Service Credits
  5. your request logs that document the errors and corroborate your claimed outage (any confidential or sensitive information in these logs should be removed or replaced with asterisks)

If the Monthly Uptime Percentage of such request is confirmed by us and is less than the Service Commitment, then we will issue the Service Credit to you within one billing cycle following the month in which your request is confirmed by us. Your failure to provide the request and other information as required above will disqualify you from receiving a Service Credit.

AWS Transit Gateway Service SLA Exclusions

The Service Commitment does not apply to any unavailability, suspension or termination of Transit Gateway, or any other Transit Gateway performance issues: (i) caused by factors outside of our reasonable control, including any force majeure event or Internet access or related problems beyond the demarcation point of Transit Gateway; (ii) that result from any actions or inactions by you or any third party (e.g., misconfiguring Transit Gateway route tables, VPC security groups, VPC route tables, VPC configurations, or credential settings, etc.); (iii) that result from your equipment, software or other technology and/or third party equipment, software or other technology (other than third party equipment within our direct control); (iv) that result from you not following the guidelines or exceeding the limitations described in the Transit Gateway Documentation on the AWS Site; or (v) arising from our suspension or termination of your right to use Transit Gateway in accordance with the Agreement (collectively, the “AWS Transit Gateway SLA Exclusions”). If availability is impacted by factors other than those used in our Monthly Uptime Percentage calculation, then we may issue a Service Credit considering such factors at our discretion.


  • "Availability Zone" and "AZ" mean an isolated location within an AWS region identified by a letter identifier following the AWS region code (e.g., us-west-1a).
  • "Monthly Uptime Percentage" is calculated by subtracting from 100% the percentage of the monthly billing cycle in which the applicable Transit Gateway was Unavailable. If the applicable Transit Gateway has only been configured for part of the month, the Transit Gateway is assumed to be 100% available for the portion of the month that it was not configured. Monthly Uptime Percentage measurements exclude Unavailability resulting directly or indirectly from any AWS Transit Gateway SLA Exclusion.
  • A "Service Credit" is a dollar credit, calculated as set forth above, that we may credit back to an eligible account.
  • "Unavailable" or "Unavailability" is when all attempts to connect to and from a Virtual Private Cloud through a Transit Gateway attachment fail in more than one Availability Zone for a period of greater than 60 consecutive seconds.