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It looks like your Azure free trial account may have hit one of the specific thresholds or limitations that trigger a switch from using credits to charging your payment method. Even though you have remaining credits, there are a few possibilities that could explain why the credit balance now shows $0.0 and why your card is being billed for the upcoming period.
One potential reason is that Azure free credits are applied only to certain types of charges or within certain usage limits. For example, if your VM ran in a configuration that exceeds the free trial’s included quota or if a resource type isn’t fully covered by the free trial, the system may start charging the card directly even if the credit balance should technically cover it. Another possibility is that the displayed $0.0 is a temporary glitch in the portal. Sometimes the Home screen cache or the billing API doesn’t immediately reflect remaining credits, while the Payment Methods page still shows them.
Azure also enforces a trial-to-paid transition. When your trial expires, or when your free credits are allocated but not automatically applied to ongoing billing periods, charges may begin appearing on your credit card. If your trial is still active (typically 30 days from May 11, so ending around June 10, 2026), your free credits should still be applied, but if you enabled “Pay-As-You-Go” or exceeded a soft limit in the VM usage, the system may preemptively bill your card to ensure continuity of service.
To verify, you can check detailed usage and credit application with this command in Azure CLI:
az consumption usage list --start-date 2026-05-11 --end-date 2026-05-15 --output table
This will show daily usage, the applied credit, and any portion billed to your card. Another check is to see your subscription state:
az account show --query "{Name:name, State:state, SpendLimit:spendLimit}" --output table
The SpendLimit field indicates whether free credits should automatically prevent charges. If it shows Off, your card can be billed even if you technically have credits remaining.
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hth
Marcin