Quick take Savings Plans win on flexibility. Reserved Instances still win on raw discount for narrow, well-predicted workloads. The break-even is not a number, it is a question about your roadmap. If you only have two minutes: 3-year No-Upfront Compute SP is the safe default for compute-heavy accounts in 2026. Standard EC2 RIs beat SPs by 1 to 4 percentage points on commitment discount, but lock you into instance family. Anything below 70% utilization turns the commitment into a cost, not a disc