Quotas - Amazon Certificate Manager
General quotasAPI rate quotas
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Quotas

The following Amazon Certificate Manager (ACM) service quotas apply to each Amazon region per each Amazon account.

To see what quotas can be adjusted, see the ACM quotas table in the Amazon General Reference Guide. To request quota increases, create a case at the Amazon Web Services Support Center.

General quotas

The following general service quotas apply to your Amazon account when using ACM.
    Item Default quota
    Number of ACM certificates

    Expired and revoked certificates continue to count toward this total.

    Certificates signed by a CA from Amazon Private CA do not count toward this total.

    		 2500
    Number of ACM certificates per year (last 365 days)

    You can request up to twice your quota of ACM certificates per year, region, and account. For example, if your quota is 2,500, you can request up to 5,000 ACM certificates per year in a given region and account. You can only have 2,500 certificates at any given time. To request 5,000 certificates in a year, you must delete 2,500 during the year to stay within the quota. If you need more than 2,500 certificates at any given time, you must contact the Amazon Web Services Support Center.

    Certificates signed by a CA from Amazon Private CA do not count toward this total.

    		 Twice your account quota
    Number of imported certificates 2,500
    Number of imported certificates per year (last 365 days) Twice your account quota
    Number of domain names per ACM certificate

    The default quota is 10 domain names for each ACM certificate. Your quota may be greater.

    The first domain name that you submit is included as the subject common name (CN) of the certificate. All names are included in the Subject Alternative Name extension.

    You can request up to 100 domain names. To request an increase to your quota, create a request in the Service Quotas console for the ACM service. Before creating a case, however, make sure you understand how adding more domain names can create more administrative work for you if you use email validation. For more information, see Domain validation.

    The quota for the number of domain names per ACM certificate applies only to certificates that are provided by ACM. This quota does not apply to certificates that you import into ACM. The following sections apply only to ACM certificates.

    		 10

    API rate quotas

    The following quotas apply to the ACM API for each region and account. ACM throttles API requests at different quotas depending on the API operation. Throttling means that ACM rejects an otherwise valid request because the request exceeds the operation's quota for the number of requests per second. When a request is throttled, ACM returns a ThrottlingException error. The following table lists each API operation and the quota at which ACM throttles requests for that operation.

    Note

    In addition to the API actions listed in the table below, ACM can also call the external IssueCertificate action from Amazon Private CA. For up-to-date rate quota information on IssueCertificate, see the endpoints and quotas for Amazon Private CA.

    Requests-per-second quota for each ACM API operation

    API call Requests per second

    AddTagsToCertificate

    5

    DeleteCertificate

    10

    DescribeCertificate

    10

    ExportCertificate

    5

    GetAccountConfiguration

    1
    GetCertificate

    10

    ImportCertificate

    1

    ListCertificates

    8

    ListTagsForCertificate

    10

    PutAccountConfiguration

    1

    RemoveTagsFromCertificate

    5
    RenewCertificate

    5

    RequestCertificate

    5

    ResendValidationEmail

    1

    UpdateCertificateOptions

    5

    For more information, see Amazon Certificate Manager API Reference.