Today is Microsoft’s free event called AzureCon, I happened to stumble across a brief session that talks about planning migrations of on-premises servers to Azure IaaS and how to get the most out of your money when moving these services to Azure. I liked the breakdown in cost analysis and explanations on how using the same amount of resources for your VMs in Azure as you do on-premises can result in extra costs since your VMs may run more efficiently using Azure’s hardware.

Session: https://azure.microsoft.com/en-us/documentation/videos/azurecon-2015-azure-iaas-proper-sizing-and-cost/

Azure Cost Estimator Tool: http://blogs.technet.com/b/cbernier/archive/2015/03/26/microsoft-azure-cost-estimator-version-2-2.aspx