FREE TOOL · NO SIGN-UP

What's your optimal commitment posture?

Every cost dashboard shows your current Savings-Plan or Reserved-Instance coverage. Almost none answer the question that actually matters: "What coverage % should I target?"

Fill three numbers below → see the optimal band, the annual $ delta, and exactly how much incremental SP/RI to buy. The math is shown — nothing hidden.

Workload drifts? See thecontinuous rebalancer →
Your numbers
Three values from your last cost dashboard.
$

≈ $1.2M / year

%

From your CUR / Cost Explorer / Azure Cost Mgmt.

Or set the spend coefficient of variation directly: % CV

Your optimal posture
Your CV (10.0%) suggests a stable workload with mild seasonality. Mid-high commitment is appropriate.
You're leaving money on the table.

Recommended coverage band

45% – 55%

Sweet spot: 50% · You're at 38.9%

Annual savings opportunity

+$37,296/yr

From $131K (today) → $168K (at 50%)

Recommended action

To reach the 50.0% sweet spot, increase your annual AWS 1Y commitment by approximately $133,200.

Annual savings at every coverage point
Discount used: 28% (AWS · 1y term).

Today

$131K

Low band (45%)

$151K

Sweet spot (50%)

$168K

High band (55%)

$185K

The math (transparent on purpose)

Optimal band is set by your spend volatility (CV %). Stable workloads can safely commit a high share; volatile workloads need flexibility:

  • CV < 5% → 60–70% (rock-steady, commit aggressively)
  • CV 5–15% → 45–55% (stable + mild seasonality)
  • CV 15–30% → 30–40% (mixed / growing fast)
  • CV > 30% → 15–25% (volatile / spiky / batch)

Annual savings = monthly spend × 12 × coverage × discount. Discounts are public industry numbers (Jan 2026 snapshot): AWS 1y SP ≈ 28%, AWS 3y ≈ 47%, Azure RI 1y ≈ 30%, Azure 3y ≈ 55%, GCP CUD 1y ≈ 25%, GCP 3y ≈ 55%.

Why we built this: the question "what % SP/RI coverage should I target?" is the most under-served question in FinOps. Apptio and Cloudability answer it for $50K/year. We make the math free.

Coach FAQ

Still have questions? Email hello@cartieai.com — replies within 4 business hours.

See full FAQ

Install CARTIEAI

Add to your home screen for quick access and offline support