My Microsoft Azure free trial recently ended, and I upgraded to a pay-as-you-go subscription so I could continue practicing with services that require a billable subscription. Shortly afterward, I received a €6.27 charge for usage dated September 1–30, even though I still had about $165 in trial credit remaining.
Before the trial ended, I tried to delete anything I created, and I didn't knowingly leave any billable services running. The charge appears to include Azure App Service (€1.73), SQL Database (€1.65), Azure Database (€1.45), and Storage (€1.17). The App Service charges occurred between September 23 and 27, at roughly €0.40 per day.
I thought the remaining trial credit would cover this usage, and I wouldn't have upgraded if I had known it could result in a real card charge. Why wasn't the usage covered by the available credit, and how can I dispute or investigate the charge? The support assistant hasn't been able to resolve the issue.
2 Answers
The remaining balance and the services shown as free aren’t always the same thing. Trial credits have eligibility rules, quotas, and expiration or subscription-status conditions. Once you convert the subscription to pay-as-you-go, usage can be billed according to the normal rates, and some charges from the previous billing period may be invoiced afterward. The billing details should show whether these were ineligible services, usage beyond a quota, or charges generated after the trial ended. If the dates genuinely fall within the trial and the resources were eligible, ask Azure billing support for a credit or correction and include the detailed invoice lines.
Start by opening Cost Management and Billing and checking the usage details for the exact dates. Free trial credit only covers eligible services and usage within the trial’s limits; it doesn’t necessarily cover every resource or charge. Deleting an app or database may also leave related storage, disks, snapshots, IP addresses, or other resources behind. Identify the exact meter that produced each charge, then contact billing support and request a manual review. There should be a path to open a billing case rather than relying only on the automated assistant.
The charge breakdown shows App Service, SQL Database, Azure Database, and Storage. I assumed the unused credit shown in the account would automatically cover those costs, so I didn’t realize they could become card charges after upgrading.
The App Service line is especially suspicious because it accumulated small daily charges for several days. Even if the main app was removed, a related resource may have remained active. I’d check the resource group, storage accounts, databases, disks, snapshots, and networking resources individually before disputing the invoice.