Cloud bills creep. A service over-provisioned 'just to be safe' in 2023 is still burning cash in 2026, and nobody remembers why. The good news: most of that waste is recoverable without touching reliability.
Right-sizing is the fastest win. We pull two weeks of utilisation data and discover the majority of instances run under 20% CPU. Moving to correctly-sized and graviton/ARM types routinely cuts compute a third on its own.
Autoscaling does the rest. Scale-to-zero for batch and dev environments, request-based scaling for web tiers, and spot instances for anything fault-tolerant. The key is good health checks so scaling never trades cost for downtime.
Then make spend visible. Per-team tagging and a cost-per-feature dashboard turn an abstract bill into something engineers can actually own. When people see the number move, they keep it moving.
We've repeatedly taken 40% off a bill in a single quarter — and the observability you add along the way pays dividends long after.