Moving from on-premises to AWS is one of the most common cloud migrations. This guide breaks down the complete 3-year TCO — what it costs, what you save, and how to model it accurately.
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30-45% total cost reduction over 3 years. Biggest savings: hardware refresh elimination ($500-$2,000/server every 3-5 years), DC overhead (power, cooling, space) and rightsizing to actual utilisation.
4 vCPU / 16GB → m6i.xlarge ($0.192/hr on-demand, $0.116/hr 3yr RI). TCOIQ automates mapping from your RVTools or Azure Migrate export.
1-year RI: 28-35% saving. 3-year RI: 40-42% saving. 100-server environment at $150K/year on-demand → $87-90K/year with 3yr RIs.
Hardware amortisation, DC rent/power, cooling, hardware maintenance, OS/hypervisor licences. Typically $2,000-$6,000 per server per year eliminated.
AWS: best for Linux-heavy, cloud-native. Azure: best for Windows Server (Hybrid Benefit saves 40%). OCI: 40-60% cheaper for Oracle workloads. TCOIQ compares all 5 simultaneously.
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