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Key Vault pricing

Safeguard and maintain control of keys and other secrets

Azure Key Vault enables Azure subscribers to safeguard and control cryptographic keys and other secrets used by cloud apps and services. Azure Key Vault provides two types of containers:

  • Vaults for storing and managing cryptographic keys, secrets, certificates and storage account keys.
  • Managed HSM pool for storing and managing HSM-backed cryptographic keys

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Prices are estimates only and are not intended as actual price quotes. Actual pricing may vary depending on the type of agreement entered with Microsoft, date of purchase, and the currency exchange rate. Prices are calculated based on US dollars and converted using Thomson Reuters benchmark rates refreshed on the first day of each calendar month. Sign in to the Azure pricing calculator to see pricing based on your current program/offer with Microsoft. Contact an Azure sales specialist for more information on pricing or to request a price quote. See frequently asked questions about Azure pricing.

Vaults

Vaults are offered in two service tiers – standard and premium.

Standard Premium
Secrets operations $-/10,000 transactions $-/10,000 transactions
Certificate operations1 Renewals –$- per renewal request.
All other operations –$-/10,000 transactions
Renewals –$- per renewal request.
All other operations –$-/10,000 transactions
Managed Azure Storage account key rotation (in preview) Free during preview.
General availability price: $- per renewal2
Free during preview.
General availability price: $- per renewal2
1Key Vault does not issue certificates or resell certificates from CAs. Key Vault provides the ability to simplify and automate certain tasks on certificates that you purchase from public CAs, such as enrol and renew.

2Storage account keys are stored as ‘secrets’ in Key Vault, and therefore, operations charges (see ‘Secrets Operations’ row above) will apply on any operation performed on these keys, including a renewal. See the FAQs below for more details on how operations are defined.

Software-protected keys

Standard Premium
RSA 2048-bit keys $-/10,000 transactions $-/10,000 transactions
Advanced key types:

RSA 3072-bit, RSA 4096-bit and Elliptic-Curve Cryptography (ECC) keys
$-/10,000 transactions $-/10,000 transactions

HSM-protected keys

Standard Premium
RSA 2048-bit keys N/A $- per key per month1 + $-/10,000 transactions
Advanced key types1:

RSA 3072-bit, RSA 4096-bit and Elliptic-Curve Cryptography (ECC) keys
N/A
First 250 keys $- per key per month
From 251 – 1500 keys $- per key per month
From 1501 – 4000 keys $- per key per month
4001+ keys $- per key per month
+ $-/10,000 transactions
1Only actively used HSM protected keys (used in prior 30-day period) are charged, and each version of an HSM-protected key is counted as a separate key. See FAQs below for more details. Billing will commence from 1 November 2018.

Managed HSM pools

Hourly usage fee per HSM pool
Standard B1 $-

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Key Vault details

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  • You can store the following types of keys and secrets in Key Vault:

    • Keys can be imported or generated in HSMs and are always locked to the boundary of the HSM. When you ask the Key Vault service to decrypt or sign with a key, the operation is performed inside an HSM.
    • You can also encrypt using keys in HSMs. In this case, cryptographic operations are performed in software, as opposed to being inside an HSM. These computations are performed in Azure compute roles.
    • Secrets are data (under 10 KB) such as passwords or .PFX files that your application can store and retrieve in plain text. The Key Vault service persists secrets encrypted using an HSM-backed key and provides an access control layer over them.

    In addition to keys and secrets, you can also store and manage SSL/TLS certificates that you've purchased from public CAs, and automatically enrol or renew them via Key Vault if the public CA is currently supported by Key Vault.

  • Every successfully authenticated REST API call counts as one operation.

    Examples of operations for keys: create, import, get, list, back up, restore, delete, update, sign, verify, wrap, unwrap, encrypt and decrypt. Note that the price charged for an operation may vary based on the type of key (for example, operations performed on a 2048-bit RSA key vs a 4096-bit RSA key are billed against different meters with different prices, as described in the pricing section above).

    Examples of operations for secrets: create/update, get, list.

    Examples of operations for certificates: create and update policies and contacts; import, renew or update certificates. Note that a certificate renewal operation has a separate cost from all other operations on certificates.

  • Operations against all keys (software-protected keys and HSM-protected keys), secrets and certificates are billed at a flat rate of $- per 10,000 operations, except certificate renewal requests, which are billed at a rate of $- per renewal. Examples: A) You perform 2,000 operations with HSM-protected keys, 1,000 operations with software-protected keys and 500 operations with secrets during a billing cycle. You will be billed for 3,500 operations during that billing cycle. B) In a given billing cycle, you perform 500 operations on 20 certificates, and 2 of these certificates are also renewed by Key Vault. You will be billed for 500 operations and 2 certificate renewal requests.

  • Each key that you generate or import in an Azure Key Vault HSM will be charged as a separate key. You will get charged for a key only if it was used at least once in the previous 30 days (based on the key’s creation anniversary date). Note that if you store multiple (historical) versions of a given key, then each version is treated as a separate key for billing purposes.

    Examples:

    • You add three HSM protected keys in your key vault. Over the next 30 days, you use the first key 10,000 times, the second key once, and you do not use the third key at all. For this 30-day period, you will get billed for 2 HSM key units. For example, if these are 2048-bit RSA keys, you will get billed 2 x $-/key/month = $-, and if these are 3072-bit RSA keys, you will get billed 2 x $-/key/month = $-.
    • You have one HSM-protected key in your key vault. You have five historical versions of that key because you have changed the value of the key four times. In the last 30 days, you used two of those versions, and did not touch the other three. For a 2,048-bit RSA key, you will get billed $- in this example, while for advanced key type, you will get billed $- in this example.
    • Note that any operations performed on HSM-protected keys will be charged separately, and will apply in addition to the HSM key charges.
  • No, there is no set-up fee for Azure Key Vault.

  • HSM key charges are not pro-rated based on the length of time that it has been enabled for. We will only charge for an HSM key if it is used at least once in the previous 30 days, based on the key’s creation anniversary date.

  • Yes, you can grant use of keys stored in Key Vault to any app, hosted anywhere (Microsoft Azure, third-party cloud, on-premises).

  • No. Only the key owner gets billed.

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