Free credit expired and the pay-as-you-go upgrade fails with this error: We can't upgrade your subscription right now.

Create an Azure subscription-management/billing support request to have Microsoft complete or unblock the pay-as-you-go conversion, because the documented portal upgrade has already failed repeatedly and the subscription remains disabled.

Request reactivation and upgrade

1. In the Azure portal, open Help + support.
2. Select New support request.
3. Choose an issue type related to Billing or Subscription management.
4. Select Cairn Tech - Platform.
5. State:
   • The free credit expired.
   • The subscription is Disabled.
   • Upgrade subscription repeatedly returns “We can't upgrade your subscription right now.”
   • No payment prompt or confirmation appears.
   • You want the existing subscription converted to pay-as-you-go and reactivated.
6. Include a screenshot of the error, the subscription ID, the approximate time of the latest attempt, and the signed-in account—but do not post those identifiers publicly.

Azure provides subscription-management support without requiring a paid technical support plan.^1^ A closely matching disabled-subscription case required the billing team to initiate backend reactivation after self-service reactivation was unavailable.^2^

The normal upgrade workflow is Subscriptions → Cairn Tech - Platform → Upgrade subscription, followed by adding a payment method, possible phone verification, naming the subscription, choosing a support plan, and selecting Upgrade.^3^ Since you already used that route and it never reached the payment stage, refreshing or repeating it is unlikely to provide additional diagnostic information.

Owner versus billing permissions

The Owner role shown under the subscription is an Azure RBAC role. It controls resources and role assignments; it does not necessarily make that identity the billing administrator. Billing roles separately control the billing relationship, including payment methods and other billing operations.^4^

Check the billing identity as follows:

1. Open Cost Management + Billing → Billing scopes.
2. Check whether a billing scope associated with this subscription is listed.
3. Alternatively, open Subscriptions → Cairn Tech - Platform → Settings → Billing properties.
4. Look for Account Admin. If it is absent, the account may use a Microsoft Customer Agreement, whose billing roles are managed differently.^5^

If another identity is the billing administrator, that person should perform or approve the upgrade. For a Microsoft Online Service Program account, the Account Administrator is authorized to change subscription billing; subscription Owner alone does not establish that authority.^6^

The Cost Management warning therefore confirms that your current identity lacks access to that particular billing scope, but it does not by itself prove that permissions caused the generic upgrade error. Include the billing-role result in the support request so the billing team can distinguish authorization from an account or payment-profile block.

Credits, funds, and charging after reactivation

An expired Azure free-account credit cannot be replenished through the upgrade workflow. Unused introductory credit is retained only for the original 30-day period; credit remaining after that period is lost.^7^

A standard individual pay-as-you-go subscription is consumption-based: charges accrue for the services consumed rather than drawing from a generic user-added balance. Some specific products support prepaid reservations or commitments, but those purchases are discounts or commitments for matching services—not general-purpose Azure credit.^8^

Before asking support to activate the subscription, review existing resources through Subscriptions → Cairn Tech - Platform → Resources and delete anything no longer required. After the upgrade:

• Existing nonfree resources can be enabled again and begin generating charges.
• Only eligible services, tiers, and quantities remain free during any applicable 12-month benefit period.
• Usage beyond those limits is charged at pay-as-you-go rates.^9^

Most resources resume automatically after reactivation. Check each service and restart it only if necessary. If resource management is still unavailable more than 30 minutes after the subscription becomes active, contact Azure Billing Support again.^10^

References

1. Create an Azure support request
2. Can't enable or upgrade my subscription to a Pay-As-You-Go subscription - Microsoft Q&A
3. Upgrade your Azure free account or Azure for Students Starter account
4. Compare AWS and Azure accounts
5. Add or change Azure subscription administrators
6. Manage access to billing information for Azure
7. Create services included with Azure free account
8. Architecture strategies for getting the best rates from providers
9. Avoid charges with your Azure free account
10. Reactivate a disabled Azure subscription