1 Understand What to Expect

Read Revenue's Code of Practice for Revenue Audits
Available at revenue.ie — sets out your rights and obligations.
Consider making a qualifying voluntary disclosure
If you know there are undeclared amounts, a voluntary disclosure before audit opens significantly reduces penalties.
Engage your accountant immediately
You have the right to be represented throughout the audit.
Confirm the audit scope and years under review
Revenue typically audits the most recent 4 years.

2 Gather Financial Records

All bank statements for the audit period (personal and business)
All sales invoices issued during the audit period
All purchase invoices and receipts
Cash sales records (till rolls, cash book)
Revenue scrutinises cash businesses closely.
Mileage logs for all years under audit

Director loan account statements
Revenue scrutinises director loans and personal expenses through the company.
List of any Benefits in Kind provided to directors
Board minutes approving salary, dividends and expenses

Keep all responses factual and concise
Never guess — say "I will check and confirm".
Have your accountant present at all meetings
Request any agreement in writing before signing
Pay any settlement within agreed timeline
Delays after settlement attract further interest.
Implement improvements to prevent future issues