GCP ยท Free tool
GCP Committed Use Discount calculator
Plug in your on-demand Compute Engine spend, pick Resource-based or Flexible, choose 1 or 3 years, and see what a CUD returns. Defaults reflect typical 2026 GCP list prices. Override the discount field if you have an enterprise quote.
Result
Adjust the inputs on the left to see your projected savings.
Monthly savings
$0
Effective discount applied
0%
Total commitment
$0
On-demand without CUD
$0
Total savings over term
$0
Payment cadence
Monthly
How the math works
Eligible monthly spend is on-demand spend times coverage. The CUD discount applies to that eligible portion. Uncovered spend stays at on-demand rates and is excluded from savings.
Total commitment is eligible monthly spend times the discounted rate, multiplied by 12 for 1-year or 36 for 3-year. GCP CUDs are billed monthly across the term so there is no upfront fee and no break-even. The CUD saves money from month one.
Resource-based CUDs lock specific vCPU and memory amounts in a single region. Flexible CUDs apply across regions and machine families at a lower discount. Defaults reflect GCP public pricing for general-purpose Linux machines as of 2026.
Math looks reasonable. The next question is what your project looks like: unused CUDs, regions where the locked CUD is stranded, machine-family migrations that broke coverage. Cloud Horizon scans for all of it inside the free 14-day audit, no card.
Frequently asked
Resource-based or Flexible CUD?
Resource-based locks specific vCPU and memory in a single region for 1 or 3 years and saves up to ~55%. Flexible (spend-based) CUDs apply across regions and machine families and save up to ~46%. Resource-based for stable workloads tied to a SKU. Flexible when the workload mix shifts.
Is there an upfront option?
No. GCP CUDs are billed monthly across the term, so the break-even is month one for every CUD. No payback period to worry about, just commitment fit.
How does it interact with Sustained Use Discounts?
CUDs apply first, then Sustained Use Discounts (SUDs) apply only to the portion not covered by a CUD. Most teams that buy CUDs see SUD value drop because the CUD already discounts the long-running portion.
What if my enterprise rate is higher?
GCP enterprise customers and partners often see larger discounts. Override the discount field with the figure from your billing console for an accurate projection.
If a calculator does its job
It tells you the answer. Then it gets out of the way.
Calculators model CUDs in isolation. The real account has stranded commitments, machine-family migrations, and dual-coverage waste. Cloud Horizon scans for all of it.