Deloitte's guidance for companies facing their first external audit is refreshingly unglamorous: secure genuine management commitment, organize the accounting records early, identify complex areas such as revenue recognition and equity transactions before the auditors do, and give the finance team both the expertise and the bandwidth to own the process. As the authors put it, "Financial statement audits are seldom 'one and done.'"
We would add one thing from our own practice: audit readiness is mostly a bookkeeping design question. When transactions are related to business performance and balance sheet items as they are recorded, audit compliant specifications can be produced automatically instead of reconstructed in December. Our rule of thumb: if management can explain every material balance from its own reporting, the auditor can too. We prepare clients by automating those specifications with our software and keeping the file ready all year, so the clean opinion follows from how the finance function works rather than from overtime.