SOA may refer to:
Accounting and business
Sarbanes-Oxley Act, officially titled the Public Company Accounting Reform and Investor Protection Act of 2002
Society of Actuaries, one of the two main professional societies of actuaries in the United States
State of the art, the highest level of development
Statement of Advice, a document that outlines the recommendation(s) of a financial planner about a particular entity's financial needs
Statement of Account
Engineering
Safe operating area, the voltage and current conditions for a semiconductor to work reliably