Dear Community, Can you help us trying to find out why our account has Cloud Spanner charges, but we don’t have any Spanner service in use. Today a new charge appeared for around US$20 in our account, and it appears on billing but If we search on the Spanner tab for services, we don’t have any acti…

Hey @Carlos_AcelerAi , Do you use Vertex AI RAG Engine? If so, it could be where those mystery charges are coming from. Vertex AI RAG Engine uses a Cloud Spanner database under the hood to manage its data. This is called RagManagedDb. This Spanner instance lives in a Google-managed project, not di…

I am facing the same problem, and I dont know if used RAG Engine of Vertex AI, but I used Vertex AI, so now my question is how can remove it from billing, it charged me for 40$.

Hello, have you created a billing support case? One of our customer has 550$ cumulative charge appeared from september 4 to today. So, I’d love to hear your update. Recently there were two more charges comes from gemini models. (1. nano banana release incident, 2. gemini 2.5 pro charge appears with…

Hey Andrew, but after 90 days (free tier passed), it doesn’t shows up any charges. Somehow at sep 4 shows up the usage. Especially, not free tier but enterprise tier pricing shows up.

I believe the default is actually the Scaled tier.

Need help to identify Cloud Spanner charges on our billing account

Google Cloud Database

LeoK October 31, 2025, 10:26am 10

Hello guys, just in case, I’ve made a guide on how to troubleshoot and stop these weird/unexpected Cloud Spanner costs.

Topic	Replies	Views
Fix Unexpected Cloud Spanner Charges Generative AI & Foundational Models vector-search	272	October 30, 2025
Managed spanner in Vertex AI RAG Engine Database cloud-spanner	69	February 19, 2026
Observability and Billing Transparency for Vertex AI RAG Engine Agents rag	54	February 19, 2026

Need help to identify Cloud Spanner charges on our billing account

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