For EC2 (and related services), the credits available are: AWS provides all the tools and services you need to create a strong, highly available and highly secure cloud infrastructure, but it`s up to you, as a customer, to ensure that best practices are followed, that you adhere to the principles of AWS Well Architected and that you meet your responsibilities under the AWS shared responsibility model. : AWS offers service credits for non-compliance with ALS operating time, but it is important to note that they are not applied automatically. To obtain service credits for downtime, AWS customers must assert a right to credit by opening a business in the AWS assistance centre with the words “SLA credit requirement” in the subject line and specifying the details of the dates and times of defaults or failures for which you use secure credits with protocols and resource IDs for the services concerned. If service credits are available for loss, they are normally used as credit on future invoices for the same service. SLA may depend on different metrics such as availability, response time for open tickets, etc. It is an agreement between the supplier and the customer. AWS SLA for S3 is available. This means that AWS guarantees that it will be 99.9 running times for standard S3 AI memory. Any lower number in your billing cycle means that AWS has not fulfilled its obligation (within the defined levels and limits). It`s also important to make sure your application infrastructure is observable – if you don`t recognize service outages, you can`t make claims against the ALA, so you can no longer get credits. You need to be able to back up your rights with log files, so make sure you know where to get them! In this article, we look at THE SLAs for some of the most commonly used AWS services, including EC2, RDS, EBS, ECS, Fargate and S3, to give you a taste of the offer, but this is only a guide and should not be considered a substitute for reading real SLAs for the services you want to use. Does this mean that if the operating time of a certain service class, say S3 Standard-Infrequent Access, is less than 99.0%, but greater or equal to 95.0% in a given month, we will open a ticket and Amazon will compensate us at 25%? All S3 services have a guaranteed operating life of 99.9%, with the exception of the following services, which are guaranteed for 99% operating time: If you paid $100 for standard S3 memory and the total operating time of the service (in this billing cycle) is 98%, you will receive a credit of $25 to be used in AWS services. AWS support response times are separated from each SERVICE-Uptime-SLAs.