Top 5 Things Revenue Looks for When Reviewing an Irish SME’s VAT Returns
At Lane OConnor we believe that VAT deserves far more respect than it typically receives. For many SME owners, the bi-monthly VAT return is a routine chore, completed quickly and forgotten just as fast. Yet VAT is one of the areas Revenue examines most closely, and its capacity to do so has grown enormously. Modern data analytics allow returns to be reconciled against payroll filings, customs data, annual accounts and third-party information at a scale that was impossible only a few years ago, meaning inconsistencies that once went unnoticed now surface quickly. With a phased roll-out of electronic invoicing for business-to-business transactions also under way, visibility is only increasing. Understanding what Revenue looks for is not about gaming the system. It is about making sure honest businesses do not create avoidable problems through carelessness.
Here are the five areas that most commonly attract attention when VAT returns are reviewed.
1. Consistency Across All Your Filings
The first and most fundamental check is whether the story told by the VAT returns matches the story told everywhere else. Sales declared for VAT should reconcile sensibly with the turnover in the annual accounts and the annual Return of Trading Details. Purchases should align with the cost base. Wage costs in the accounts should correspond with payroll submissions.
When these figures diverge without explanation, questions follow. Common innocent causes include timing differences, exempt income or accounting adjustments, but if the business cannot explain the difference readily, an enquiry can escalate. The discipline is simple: reconcile VAT returns to the accounts at least annually, ideally when preparing the Return of Trading Details, and document the reasons for any differences while they are fresh.
2. The Validity of Input VAT Claims
Reclaimed VAT is effectively money paid out by the State, so input credits receive particular scrutiny. Two issues arise repeatedly. The first is documentation: a valid VAT invoice is required to support a claim, and claims based on statements, quotes or nothing at all do not survive examination. The second is deductibility: certain costs carry restricted or no VAT recovery, with entertainment expenses and passenger vehicles among the well-known examples, and VAT on costs relating to exempt activities or private use is not recoverable either.
Businesses that claim everything without applying these rules build up an exposure with every return. A periodic review of what is being reclaimed, and the paperwork behind it, is one of the most valuable VAT health checks an SME can perform.
3. Whether the Correct Rates Are Being Applied
Ireland operates multiple VAT rates, and applying the wrong one is among the most common and expensive VAT errors. Businesses with mixed supplies face the greatest risk: a food business selling items at different rates, a contractor working across different types of supply, or a retailer with a broad product range can easily default to habit rather than the correct treatment.
Undercharging VAT is the dangerous direction, because the shortfall remains the business’s liability whether or not it was collected from customers, and it accumulates silently across every affected sale until corrected. Rate changes announced in budgets add further risk for businesses that fail to update systems promptly. Wherever there is doubt about the correct rate on a product or service, resolving it definitively, with professional advice if needed, is far cheaper than discovering the answer during an intervention.
4. Cut-Off, Timing and Basis of Accounting
Reviews also examine when VAT is being accounted for, not just how much. Businesses using the invoice basis must account for VAT when invoices are raised, not when payment arrives, while those authorised to use the cash receipts basis must apply it correctly and remain within its conditions. Deposits and advance payments trigger VAT obligations that are frequently overlooked, and sales pushed into a later period to ease cash flow create exactly the kind of pattern that analytics are designed to detect.
Consistency and accuracy of timing matter because interest applies to VAT paid late, even where the error is purely one of timing. Clean cut-off procedures at each period end remove the risk.
5. The Quality of the Underlying Records
Finally, everything above depends on records. Businesses must retain the documentation behind their returns for six years, and a review will test whether the records genuinely support the figures filed. Organised digital records, reconciled ledgers and invoices that can be produced on request transform an intervention from an ordeal into an inconvenience. Fixed penalties apply for failures to keep proper books and records, but the greater cost of poor records is the inability to defend figures that were probably correct all along.
Prevention Is Cheaper Than Correction
For Irish SMEs, the direction of travel is clear: more data, more matching, more visibility. The businesses with nothing to fear are those whose VAT processes are accurate, consistent and documented. A periodic VAT review, carried out calmly and professionally before Revenue ever asks a question, is a modest investment that removes one of the most avoidable risks in Irish business.
If you would like to discuss your business, contact us on or email marie@laneoconnor.com or visit laneoconnor.ie
Disclaimer: This article is based on publicly available information and is intended for general guidance only. While every effort has been made to ensure accuracy at the time of publication, details may change and errors may occur. This content does not constitute financial, legal or professional advice. Readers should seek appropriate professional guidance before making decisions. Neither the publisher nor the authors accept liability for any loss arising from reliance on this material.
