Loading...
Promise the cloud provider steady usage, get a lower price in return.
Quick Definition
Commitment-based discounts lower cloud costs in exchange for committing to a level of usage over one or three years. Reserved Instances and Savings Plans are common examples, offering significant savings over on-demand pricing for predictable, steady-state workloads.
Commitment-based discounts trade flexibility for price. You promise a provider one or three years of usage, through Reserved Instances, Savings Plans, or committed use contracts, and pay 30 to 70 percent less than on-demand rates.
These discounts are the largest single savings lever for steady workloads, and the easiest to get wrong. Commit to more than you use and the unused commitment is pure waste; commit to less and you overpay on-demand for the gap. The craft is measuring your stable baseline first and tracking utilization and coverage continuously, summarized in the effective savings rate.
Example. A company analyzes six months of usage and finds a steady floor of 200 instances. It commits to 180, leaving headroom for change, and covers spikes with on-demand and Spot. The blend cuts compute cost 38 percent with minimal lock-in risk.
Commitments deserve quarterly review, not an annual guess. The FinOps guide covers rate optimization strategy in depth.
Savings Plans and flexible commitments suit changing workloads; Reserved Instances suit stable, predictable ones. Many companies blend both.
As close to 100 percent as possible. Unused commitment is money spent on nothing, so most teams target above 95 percent.
Partially. Some types allow exchanges or resale, but flexibility is limited, which is why baseline analysis comes first.