429 RESOURCE_EXHAUSTED ("Your prepayment credits are depleted") but AI Studio Billing page is inaccessible

chatbotservice_LNU · June 5, 2026, 6:53am

Title:

429 RESOURCE_EXHAUSTED (“Your prepayment credits are depleted”) but AI Studio Billing page is inaccessible

Hello,

I am experiencing an issue with Gemini API billing and access.

Environment:

Google Cloud Project: Countec-AI
Workspace Domain: countec.co.kr
Gemini API enabled
Active Cloud Billing account attached
API key valid

What works:

client.models.list()

What fails:

client.models.generate_content()
client.models.embed_content()

Error:

429 RESOURCE_EXHAUSTED

“Your prepayment credits are depleted. Please go to AI Studio at https://ai.studio/projects to manage your project and billing.”

What I have already verified:

Billing account is active.
Gemini API is enabled.
API key authentication works.
Google AI Studio service is enabled in Workspace Admin Console.
Incognito mode tested.
models.list() succeeds.
generate_content() and embed_content() both fail.

Google Cloud Billing Support reviewed the case and advised that:

The project appears to be operating under Gemini API Tier 1 / Tier 2.
These tiers require a prepayment balance.
A depleted prepayment balance causes the 429 error.
However, Billing Support cannot access AI Studio internal billing information.

My problem:

I cannot access the AI Studio Billing page to view or replenish the prepayment balance.

Questions:

How can I view the current prepayment balance?
How can I add prepayment credits if AI Studio Billing is inaccessible?
Is there a known synchronization issue between Google Cloud Billing and AI Studio billing?
Can someone verify whether this project is associated with a depleted prepayment balance?

Thank you.

faizanali · June 5, 2026, 6:55am

I also got and a lot of other people are also getting this error

Anand_Parmar · June 5, 2026, 8:16am

Facing same issue & Didn’t found any solutions

Jon_Matthews · June 17, 2026, 11:28am

Hi,

I’m wondering what happens when you try to access the AI studio billing page? Is an errors shown? Any screenshots you can provide would be helpful.

julia_evelia_mena_de · July 14, 2026, 2:34am

Subject: Manual billing sync request – 429 “prepayment credits are depleted” despite active payment (project gen-lang-client-05558059..)

Hi team,

I’m requesting a manual billing sync for my project, as I’m stuck in a billing mismatch state that I can’t resolve from my side.

Details:

Project ID: gen-lang-client-05558059..
Billing Account ID: 01B9B0-00C0B6-8972..
Cloud Billing shows an active Visa card linked to this billing account, and a confirmed payment of COP 300,000 has already gone through.
Despite this, the Gemini API keeps returning:
429 RESOURCE_EXHAUSTED
“Your prepayment credits are depleted.”
When I try to fix it myself via AI Studio’s “Set up Prepay” page, the page loads blank and never renders the setup form, so I have no way to configure or verify the prepay status from the UI.

The billing account itself appears active and funded on the Google Cloud side, but this doesn’t seem to be reflected on the AI Studio / Gemini API side.

Could someone please manually sync the billing status for this project so the prepay credits are recognized? Happy to provide any additional screenshots or details needed.

Thank you very much for your help.Subject: Manual billing sync request – 429 “prepayment credits are depleted” despite active payment (project gen-lang-client-05558059..)