If you have undeclared income, an error in a filed return, or a tax liability you know exists but have not yet addressed, a voluntary disclosure to Revenue is almost certainly your best option. It is not a pleasant process, but it is a far better one than waiting for Revenue to find the issue themselves - and the difference in outcome, measured in penalties and stress, can be enormous.
I have guided many clients through voluntary disclosures over the years. The consistent experience is that people who come forward early get treated proportionately. People who are found late pay for the delay in every sense.
What Is a Voluntary Disclosure?
A voluntary disclosure is a formal process by which a taxpayer proactively tells Revenue about an underpaid or undeclared liability, before Revenue has identified it. Revenue’s Code of Practice for Revenue Audits and other Compliance Interventions sets out the specific rules and penalty rates that apply.
The critical distinction in the voluntary disclosure framework is between:
Unprompted voluntary disclosure. You contact Revenue of your own initiative, before Revenue has made any contact with you about the issue. This produces the lowest penalty rates - often nil or a nominal percentage.
Prompted voluntary disclosure. Revenue has contacted you - typically an audit notification letter - but you make a disclosure of the liability before the audit examination begins. This produces reduced (but not nil) penalty rates.
Once Revenue has begun the substantive examination of your records, the voluntary disclosure window has passed. Any liability identified at that stage is subject to full audit penalty rates. For a detailed walkthrough of what happens during a Revenue audit, see our guide to Revenue audits.
What Can Be Disclosed?
A voluntary disclosure can address virtually any type of underpaid Irish tax:
Income tax on undeclared income - rental income, freelance earnings, foreign income, cash sales, investment income. Corporation tax shortfalls - underreported profits, disallowed expense claims, capital gains not included. VAT - errors in VAT returns, under-declarations, failure to register when required. PAYE - unreported benefit-in-kind, director’s loan issues, payroll processing errors. Capital Gains Tax - gains on property or investments not declared. RCT - Relevant Contracts Tax issues in the construction sector. Crypto asset gains - undeclared CGT on cryptocurrency disposals.
The scope of the disclosure should be comprehensive. A voluntary disclosure that addresses some liabilities while leaving others undisclosed creates a situation where a subsequent Revenue audit on the same period can attract full penalties on the undisclosed items.
The Penalty Framework: Why Timing Matters So Much
Revenue’s penalty structure for tax defaults has three tiers based on behaviour:
Careless behaviour. You made an error without reasonable care but without any intention to evade. Example: claiming a personal expense as a business expense through carelessness, or failing to register for VAT when you should have done so.
Deliberate behaviour. You knew the liability existed and chose not to declare it, or you actively took steps to reduce your tax through means you knew were not permitted.
The penalty rates for each behaviour category then depend on whether the disclosure was unprompted, prompted (after audit notification but before examination), or discovered by Revenue:
| Behaviour | Unprompted | Prompted | Audit Finding |
|---|---|---|---|
| Careless (no significant consequences) | Nil | Nil to 3% | Up to 20% |
| Careless (significant consequences) | Nil | Nil to 10% | Up to 40% |
| Deliberate | Nil to 10% | 10% | Up to 100% |
These percentages are applied to the additional tax found. On a substantial liability - say 50,000 euro of underpaid tax - the difference between a nil penalty on an unprompted disclosure and a 100% penalty on a Revenue audit finding is 50,000 euro. The interest (at 8% per annum from when the tax was originally due) applies in all cases regardless of the disclosure route.
This penalty framework is the reason I consistently advise clients who know they have an exposure to act before Revenue contacts them. The financial benefit of coming forward unprompted is measurable and often very significant.
How the Process Works
Step 1: Quantify the liability accurately.
Before contacting Revenue, you need to know what you owe. This means going back through your records for all relevant years, identifying every underpaid or undeclared liability, and calculating the tax, interest, and applicable penalty. Getting this right matters - an incomplete disclosure that misses items Revenue later identifies undermines the voluntary disclosure and can affect the penalty treatment.
This is where working with an accountant is essential. The quantification process is detailed and technical, and an error in the calculation can create problems later.
Step 2: Prepare the disclosure.
A voluntary disclosure is a written document submitted to your local Revenue district or to the relevant Revenue compliance unit. It sets out the tax head(s) involved, the years or periods covered, the nature of the under-declaration, the amount of additional tax, the calculated interest, and the applicable penalty.
The tone and accuracy of the disclosure document matter. A clear, complete, professionally prepared disclosure signals good faith and typically results in a straightforward processing.
Step 3: Submit and make payment.
The disclosure is submitted to Revenue along with (or very shortly followed by) payment of the tax, interest, and penalty. Revenue will review the disclosure and, if satisfied it is complete, issue confirmation that the matter is settled.
If Revenue has questions about the disclosure, they will raise them. These are typically straightforward to address with proper documentation. If Revenue considers the disclosure to be incomplete, they may convert the matter to a formal audit - which is why thoroughness at the quantification stage matters.
Step 4: Receive the settlement.
Once Revenue is satisfied the disclosure is complete and payment has been received, they issue a settlement confirmation. For disclosures above a certain threshold, Revenue publishes details in the tax defaulters list in Iris Oifigiuil - the official state gazette. This publication threshold is currently 35,000 euro in tax, interest, and penalties combined. Disclosures below this threshold are not published.
The Publication Question
The tax defaulters list is a concern for many clients considering a voluntary disclosure. Being published on this list - which appears quarterly and is widely circulated - has reputational implications for some businesses.
The position on publication for voluntary disclosures is more favourable than for audit findings. Unprompted voluntary disclosures where the combined liability (tax, interest, and penalty) is below 35,000 euro are not published. Even above this threshold, the publication entry for a voluntary disclosure typically notes that the matter was settled under the voluntary disclosure regime, which is a factual distinction from a case where Revenue found the issue.
The calculation of whether a disclosure will breach the publication threshold is something your accountant should work through with you before the disclosure is submitted.
Crypto, Rental Income, and Specific High-Risk Areas
Revenue has specific compliance programmes targeting particular areas of underdeclaration. Current priority areas include:
Crypto assets. Revenue receives exchange data through the EU’s DAC8 framework. Irish crypto investors with significant undisclosed CGT are increasingly receiving Revenue letters. If you have unreported crypto gains from prior years, the window for an unprompted voluntary disclosure is narrowing.
Rental income. Revenue has been running targeted landlord compliance programmes for several years, cross-referencing property registration data against income tax returns. Landlords who have not declared rental income are consistently being identified.
Foreign income. The Common Reporting Standard (CRS) means Revenue receives automatic data from financial institutions in over 100 countries about accounts held by Irish residents. Foreign income that was not declared is increasingly visible to Revenue.
In each of these areas, the voluntary disclosure route is significantly preferable to waiting to be found. Understanding how Revenue selects businesses for audit can help you assess your own risk.
The Bottom Line
If you know you have an undeclared liability - from any source, for any period - act now. The longer you wait, the more interest accumulates, the greater the risk that Revenue finds it first, and the worse the penalty outcome becomes.
The first step is a confidential conversation with your accountant to quantify what is actually owed. That conversation is not an admission of anything - it is the beginning of the process of resolving the issue in the most favourable way available to you.
Paddy Malone FCA AITI
Paddy is the principal of Malone & Co. Chartered Accountants in Dundalk. A Fellow of Chartered Accountants Ireland and a Chartered Tax Consultant with the Irish Tax Institute, he has been advising businesses across County Louth and the North-East for over 35 years.