Audit
Learn what an audit is in Ireland, the main types, what triggers a Revenue audit and how to prepare.
Published Monday 17 August 2026
Table of contents
Key takeaways
- In Ireland, an audit can mean a statutory audit of company accounts under the Companies Act 2014 or a Revenue compliance intervention checking your tax returns.
- Small companies may qualify for audit exemption if they meet at least two of three size thresholds in the current and preceding financial year: turnover of €15 million or less, balance sheet total of €7.5 million or less, or 50 employees or fewer.
- Revenue selects cases for audit using risk analysis, data matching and real-time analytics, so accurate record-keeping is your best defence.
- Qualifying disclosures made before Revenue contacts you can reduce penalties and protect you from publication on the list of tax defaulters.
What is an audit?
An audit is an independent examination of financial records to confirm they are accurate and comply with relevant laws. For Irish businesses, this typically means either a statutory audit of company accounts required by the Companies Act 2014 or a Revenue compliance intervention that checks whether your tax returns are correct.
A statutory audit gives shareholders, lenders and other stakeholders confidence that the financial statements present a true and fair view of the company. A Revenue audit, on the other hand, focuses on tax compliance and can review VAT, PAYE, income tax or corporation tax records.
Types of audits in Ireland
Irish businesses may encounter different types of audits depending on their size, structure and circumstances.
- Statutory (company) audit: a formal examination of annual financial statements by a registered statutory auditor, required for companies that do not qualify for audit exemption
- Revenue tax audit or compliance intervention: an examination by Revenue to verify the accuracy of tax returns and ensure compliance with tax law
- Internal audit: an in-house review of financial controls and processes, often conducted by larger organisations to identify risks and improve efficiency
- External audit: an independent review performed by an auditor outside the organisation, covering either statutory requirements or specific engagements such as grant compliance
Who needs an audit? Audit exemption and thresholds
Not every Irish company needs a statutory audit. A small company qualifies for audit exemption if it meets at least two of the following three criteria in both the current and preceding financial year:
- annual turnover of €15 million or less
- balance sheet total of €7.5 million or less
- 50 employees or fewer
Micro companies have lower thresholds: €900,000 turnover, €450,000 balance sheet total and 10 employees. These thresholds were set by SI 301/2024 from 1 July 2024. From 16 July 2025, a company only loses audit exemption if it files its annual return late more than once in a five-year period. PLCs and certain regulated entities, such as insurance undertakings and credit institutions, cannot claim the exemption regardless of size.
What triggers a Revenue audit?
Revenue uses a range of methods to identify cases for compliance intervention.
- REAP (Revenue's risk evaluation, analysis and profiling system), which scores taxpayers based on risk indicators
- real-time VAT and PAYE analytics that flag unusual patterns
- third-party data matching, for example comparing your returns with information from banks, other government departments or business partners
- a small number of randomly selected cases
- late or missing returns
The audit process
Revenue operates a three-level Compliance Intervention Framework. Level 1 supports voluntary compliance through guidance and reminders. Level 2 includes risk reviews and Revenue audits. Level 3 covers investigations into suspected fraud or evasion. The levels are not sequential, and Revenue may move directly to any level based on the nature of the risk.
If you are selected for an audit, Revenue notifies you in writing and outlines the taxes and periods under review. You then gather your records and work with your accountant or tax adviser to prepare. Revenue examines the relevant returns, and at the conclusion of the process, it issues findings. You can find full details in the Code of Practice for Revenue Compliance Interventions.
How far back can Revenue go?
Revenue generally has four years from the end of the year of assessment to raise or amend an assessment. However, there is no time limit where fraud or neglect is suspected, or where no return was filed. To protect yourself, you should keep tax and accounting records for at least six years after the end of the relevant accounting period.
Common issues Revenue finds
Many Revenue interventions turn up the same recurring errors. Knowing where mistakes tend to happen helps you check your own returns before Revenue does.
- VAT timing errors, such as claiming or accounting for VAT in the wrong period
- expense claims that mix business and personal costs, for example travel, mileage and home-to-work journeys
- payroll and PAYE errors, including misclassifying workers or under-reporting benefits
- under-declared income, particularly cash sales or income from other sources
- VAT on cross-border trade, where goods and services from other EU countries are not self-accounted correctly
Qualifying disclosures and penalties
If you discover an error in a tax return, making a qualifying disclosure can reduce the penalties you face. An unprompted qualifying disclosure, made before Revenue contacts you about an audit, attracts lower penalties than a prompted disclosure made after notification. A qualifying disclosure also gives protection from publication on Revenue's quarterly list of tax defaulters, provided the total tax settlement does not exceed the €50,000 publication threshold.
How to prepare for an audit
Good preparation reduces stress and helps an audit run smoothly. Follow these steps to stay audit-ready.
- Keep thorough records of all income, expenses and supporting documents.
- Reconcile your accounts regularly to catch errors early.
- Separate business and personal finances so transactions are clear.
- Document expenses and claims with receipts, invoices and explanations, for example noting the business purpose of travel costs.
- Review returns before filing to ensure accuracy.
- Work with an accountant or registered statutory auditor who understands your business.
- Keep records for at least six years after the end of the relevant accounting period.
Your rights and obligations during a Revenue audit
During a Revenue audit you have specific rights and duties, which are set out in Revenue's Code of Practice and Customer Service Charter.
- the right to be told what taxes and periods are being examined
- the right to representation by an accountant, tax adviser or statutory auditor
- the right to reasonable time to prepare documents and responses
- the duty to cooperate fully and provide requested records
What happens after an audit?
Once an audit concludes, there are typically three possible outcomes. Revenue may confirm that no additional liability arises. Alternatively, you and Revenue may reach an agreed settlement covering any underpaid tax, interest and penalties. If you disagree with the findings, you can appeal the assessment to the Tax Appeals Commission.
Why audits matter
Audits play an important role in the Irish business environment.
- Compliance: audits help ensure businesses meet their legal and tax obligations. According to the Revenue Commissioners, more than 272,000 audit and compliance interventions in 2024 recovered €591 million in tax, interest and penalties.
- Credibility: audited accounts can strengthen your position when applying for loans or attracting investors.
- Better decisions: the audit process often highlights areas for improvement, helping you refine your financial controls and make more informed choices.
Keep your records audit-ready with Xero
Xero helps you maintain accurate, organised records year-round. Automated bank reconciliation matches transactions daily, digital document capture stores receipts and invoices in one place, and customisable financial reports give you a clear view of your finances. When you're ready to simplify your bookkeeping, get one month free and see how Xero can support your business.
FAQs on audits
Here are answers to common questions Irish business owners have about audits.
Do I need an audit for my small company?
You may qualify for audit exemption if your company meets at least two of three size criteria in both the current and preceding financial year. Check the thresholds and ensure your annual return is filed on time to retain exemption.
How many years can Revenue go back?
Revenue can generally go back four years. Where fraud, neglect or a failure to file is involved, there is no time limit.
How long do I need to keep my records?
You should keep tax and accounting records for at least six years after the end of the relevant accounting period. Some business contracts or grant conditions may require longer retention.
What is the difference between a statutory audit and a Revenue audit?
A statutory audit examines whether a company's financial statements give a true and fair view under the Companies Act 2014. A Revenue audit checks that your tax returns are accurate and that you have paid the correct amount of tax.
What is a qualifying disclosure?
A qualifying disclosure is a written statement to Revenue admitting a tax underpayment before, or shortly after, you are notified of an audit. It can reduce penalties and protect you from being named on the list of tax defaulters.
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Disclaimer
This glossary is for small business owners. The definitions are written with their requirements in mind. More detailed definitions can be found in accounting textbooks or from an accounting professional. Xero does not provide accounting, tax, business or legal advice.