Your Auditor Found Unreported Income: Immediate Steps

Reconstruction is where these disclosures are won or lost. Bank deposits are the anchor: every inflow classified as revenue, refunds, or non-income with the method shown. Customer records, supplier purchase volumes that imply sales levels, and point-of-sale or platform reports corroborate. Where records are genuinely incomplete, engage a tax agent for the quantification methodology — the FTA will test your figures against third-party data regardless, so the method must be defensible. Never disclose a deliberately low partial figure hoping it passes: understated disclosure of unreported income is worse than a careful full one.

The 20-business-day clock is unforgiving here because quantification takes time. Start the reconciliation on discovery day, engage professional help immediately if records are messy, and file by day 15 with the most complete accurate figures the window allows. A late disclosure still beats non-disclosure by a wide margin — but non-disclosure of unreported income, once discovered, is the scenario most likely to attract the harshest end of the penalty range and, in extreme cases, criminal referral considerations. The asymmetry is total: disclose.

Article 10 of Federal Decree-Law No. 28 of 2022 on Tax Procedures (as amended) requires a voluntary disclosure where a tax return, tax assessment, or refund claim understated the tax due, and Article 10 of Cabinet Decision No. 74 of 2023 sets the deadline: within 20 business days of becoming aware where the understatement exceeds AED 10,000; an error of AED 10,000 or less is corrected in the next tax return instead. The clock starts on awareness, not on the date the error happened: an invoice mistake from two years ago only starts the clock on the day you actually discover it. Business days are UAE working days, so Fridays, Saturdays, Sundays, and UAE public holidays do not count. In practice, the single most important habit is writing down the discovery date the day it happens — an internal memo or email recording what was found, by whom, and when — because that date is what the 20-day count is measured against if the FTA ever asks.

An FTA-registered tax agent can prepare and file the voluntary disclosure on your behalf through EmaraTax, and for complex errors — multi-period corrections, related-party adjustments, designated-zone treatments — professional preparation materially reduces the risk of a second, corrective disclosure. The legal responsibility stays with the taxable person: the agent files for you, but the declaration is yours. If you already have an agent, tell them the moment you suspect an error rather than after you have decided what the right figures are — the 20-business-day clock runs from awareness, and the days you spend deciding are days the clock is already counting.