Audit Analytics recently released its Twenty-Year Review of Audit and Non-Audit Fee Trends report. Using data from the Audit Analytics SEC Audit Fees database, this report provides a detailed analysis and comparison of trends in audit and non-audit fees disclosed by SEC-registered companies between 2002 and 2021. Analyzing both the audit and non-audit fees paid to external auditors is of interest because it provides insights into both audit risk and auditor independence.