Cloud Migration: Avoiding the 5 Most Common Mistakes

Introduction

Moving your infrastructure to the cloud is one of the highest-impact decisions a growing business can make. When done correctly, it delivers scalability, cost efficiency, and resilience. When done badly, it creates downtime, security exposure, and unpredictable bills.

Here are the five mistakes we see most often.

Mistake 1: Lift-and-Shift Without Optimisation

Simply moving your existing servers to the cloud without re-architecting workloads means you pay cloud prices for on-premise efficiency. Always assess each workload for cloud-native alternatives.

Mistake 2: Underestimating Data Transfer Costs

Cloud providers charge for data egress (moving data out). Many businesses are shocked by their first bill. Model your data flows before migrating.

Mistake 3: No Disaster Recovery Strategy

The cloud isn't a backup. You still need a defined RTO and RPO, tested regularly. Assume failure and design for recovery.

Mistake 4: Ignoring Identity and Access Management

Cloud environments need robust IAM from day one — multi-factor authentication, conditional access policies, and privileged identity management.

Mistake 5: No Cloud Cost Management

Without tagging, budgets, and alerts, cloud spend can spiral. Implement FinOps practices early, not as an afterthought.

Working With Module IT

We provide cloud migration strategy, execution, and ongoing optimisation — with cost governance built in from the start.