Google Cloud Spend Caps: The Emergency Brake Your Cloud Bill Needs

28East

Oct 6

3 min read

Until now, a Google Cloud budget could warn you about overspending, but it couldn't stop it. Google's new Spend Caps change that. Here's how they work and what they mean for your business.

Google Cloud Spend Caps Explained

Spend Caps are a new feature in Google Cloud Budgets, currently in Public Preview.It works by allowing you to set a monthly limit for a single service in a single project. When spending reaches 100% of that limit, Google Cloud pauses new usage for that service.

Three things make Spend Caps useful:

They're non-destructive: Your data and resources are not deleted, and other services keep running.
They warn you early: Billing admins and project owners get email alerts at 50% and 80%.
They're easy to reverse: Usage stays paused until you lift the cap in the billing console, which takes one click.

Spend Caps vs Budget Alerts

A budget alert is just a notification. It emails you when spending crosses a set percentage, but your app keeps running and costing money.If the alert fires at 2 am on a Saturday, nothing changes until someone logs in or a custom script steps in.

A Spend Cap acts on its own. Here's how the two compare:

Services That Support Spend Caps

Spend Caps are gradually rolling out over the Google Cloud suite. These services already support this feature:

Gemini API.
Gemini Enterprise Agent Platform (formerly Vertex AI).
Cloud Run.
Cloud Run functions.
Firebase services such as Firebase AI Logic, Firebase App Hosting and Cloud Functions for Firebase.

Notice a theme in this initial lineup? Google is targeting generative AI tools and serverless workloads first, and that focus makes sense. AI costs can be unpredictable, where one prompt can trigger complex processing and a runaway bill. To protect developers, Google says caps on these AI services kick in within minutes of hitting your limit.

The Pros and the Limits

For most teams, Spend Caps are a big step forward. They give you a safety net to build and test with AI without the fear of a runaway bill. But there are limits you should know about:

They're not instant: Cost data takes time to process, so set your cap slightly below your true spending ceiling.
Commitments still bill: Committed Use Discounts, provisioned throughput, and flat subscriptions continue as contracted.
The scope is narrow: Each cap covers one project and one service per calendar month. You can't set one cap across your whole organisation.
Some services are missing: Compute Engine, BigQuery, Cloud Storage and Kubernetes Engine aren't supported yet.

What This Means for 28East Customers

Many of our customers combine Google Maps Platform with tools like Gemini and BigQuery to build smarter location tools.

If you use Gemini or Cloud Run, you can cap those costs today. Google Maps Platform isn't on the supported list yet, so you'll need other controls for your Maps spend.

The good news is that strong options already exist for services without Spend Caps:

API daily quotas: Cap how many requests an API takes each day. Once it hits the limit, it stops until tomorrow. You'll find this under APIs & Services > Quotas, and it works for Google Maps Platform APIs too.
Automated shut-offs: Link a budget alert to a script that acts for you. When spending crosses your limit, it can switch off billing or stop servers, even outside business hours.

The safest setup usually combines Spend Caps, quotas and automated alerts. Getting that mix right takes some know-how, and that's where a local partner helps.

Take Control of Your Cloud Costs

As a Google Maps Premier Partner, 28East helps South African businesses get more from Google Cloud without surprise bills. Our Google-trained support team can help you set up budgets, Spend Caps and quotas that fit how you actually use the platform. When you open your Google Cloud account through us, you also get local billing and local support.

Ready to protect your cloud budget? Get in touch with our team today.