Work out build minutes cost instantly with clear inputs, formula shown and shareable results.
Hosted CI bills per runner minute, multiplied by a size factor — a 4-vCPU runner typically costs twice a 2-vCPU one and an 8-vCPU four times. That multiplier is why moving to a bigger runner only saves money if it cuts duration by more than the price increase, which is worth checking rather than assuming.
CI cost
minutes = builds x average duration; cost = minutes x price per minute x runner size multiplier
Only if the build parallelises well enough that duration falls faster than the multiplier rises. A single-threaded build on an 8-vCPU runner costs four times as much for the same duration.
Not running work that does not need running: path filters so unrelated changes skip suites, and cancelling superseded runs on the same branch.