Back to home
All guides
🔴
Google Cloud Platform · FinOps Field Guide

GCP Cost Optimization: The Complete Guide for FinOps Teams (2026)

GCP's pricing model is the cleanest of the big three — but that doesn't mean cheap. The two biggest GCP cost levers (Committed Use Discounts and BigQuery slot management) are dramatically underused. Here's the 11-pattern playbook.

24%
Average waste in GCP bills
40%
BigQuery share of waste
14 days
Median time-to-savings

The 11 patterns

01

Committed Use Discounts (CUDs)

High impactLow effort20-57%

1-year or 3-year commitments on vCPU + memory. Resource-based CUDs apply to any matching VM. Coverage target: 70% of baseline.

02

BigQuery slot reservation (vs on-demand)

High impactMedium effort20-40%

If you process >5TB/month, switch from on-demand to reserved slots. Edition: Standard for ad-hoc, Enterprise for production.

03

BigQuery query optimization

High impactMedium effort30-60% on BQ

Partition + cluster every table >100GB. Use `SELECT *` only when you mean it. `INFORMATION_SCHEMA.JOBS_BY_PROJECT` reveals the worst queries.

04

Sustained Use Discounts (automatic)

Low impactNone effort20% on compute

Automatic for any VM running >25% of the month. Free money — just verify it's applying.

05

Preemptible / Spot VMs

High impactMedium effort60-91%

Cloud Run jobs, GKE node pools, Dataflow workers. 24h max lifetime — design for it.

06

Right-size VMs (Recommender)

High impactLow effort15-30%

GCP Recommender API surfaces resize candidates. `gcloud recommender recommendations list --recommender=google.compute.instance.MachineTypeRecommender`.

07

Cloud Storage class transitions

Medium impactLow effort40-80%

Lifecycle rules on buckets: Standard → Nearline at 30d, → Coldline at 90d, → Archive at 365d.

08

GKE Autopilot for spiky workloads

Medium impactHigh effort25-50%

Pay per pod-second, not per node. Massive win for batch/event-driven workloads. Standard mode wins for steady-state.

09

Cloud SQL right-sizing + HA toggle

Medium impactMedium effort20-50%

HA = 2x cost. Enable only on prod. Right-size CPU/memory based on Cloud SQL Insights.

10

Network egress audit

Medium impactMedium effortvaries

Cloud CDN cuts egress by 60% on cacheable content. Premium → Standard tier saves on intercontinental traffic.

11

Budget alerts + Pub/Sub auto-actions

High impactMedium effortprevents runaway

Billing budget → Pub/Sub topic → Cloud Function that disables non-prod project at 95% threshold. Industry-leading guardrail.

Free audit

Run a free GCP cost audit

CARTIE AI runs all 11 patterns against your GCP project. Read-only viewer role, no agents.

Get the audit

THE FINOPS BRIEF

3 cost-saving tips, every Tuesday.

Built for finance & engineering teams who are tired of paying for cloud they don't use. No fluff. Just what works.

Unsubscribe anytime. We never sell your data.

We value your privacy. Cookies help us improve your experience. Learn more

Install CARTIE AI

Add to your home screen for quick access and offline support