Annual Report Services for Estonian OÜs

An OÜ registered in October has its first financial year running from October to the end of the following December — a 15-month period (assuming a standard 31 December year-end). However, under the Raamatupidamise seadus, the first financial year can run up to 18 months. The deadline for the first annual report is 6 months after the end of that first financial year. So if registered in October 2025 and the first financial year ends 31 December 2026, the first annual report is due by 30 June 2027. Some OÜs choose to set a shorter first financial year to get into a regular annual rhythm — we advise on the optimal financial year structure at registration.

File immediately. Two years of missing annual reports means two outstanding fines from the Äriregister and, more urgently, the OÜ is approaching the threshold where the register can initiate compulsory dissolution proceedings. The good news: even very late filing is better than never filing. We prepare the overdue annual reports for the two missing years (two separate annual reports at our late filing rate), file them in order, and handle the communication with the Äriregister about the outstanding penalty notices. The Äriregister does have discretion to reduce fines when the overdue reports are submitted proactively. We recommend acting now — compulsory dissolution, once initiated, requires a court process to reverse.

Yes — OÜs can have any 12-month financial year, not just the calendar year. Non-calendar year-ends are common for seasonal businesses, subsidiaries of foreign companies that need to align with a parent’s reporting period, or OÜs that simply want to spread their accountant’s workload away from the standard June peak. The financial year change requires an amendment to the OÜ’s articles of association (põhikiri) — we handle this. The annual report deadline remains 6 months after the chosen year-end regardless of when that falls. If you change to a 31 March year-end, your annual report deadline becomes 30 September. We advise on the pros and cons of non-calendar year-ends during the initial consultation.

For most Estonian OÜs — no. The audit obligation under the Raamatupidamise seadus applies to medium and large companies. An audit is mandatory if the OÜ exceeds at least two of the following thresholds: revenue €5 million, total assets €2.5 million, or an average of 50 employees; or exceeds at least one of the following thresholds: revenue €15 million, total assets €7.5 million, or an average of 180 employees. Micro-entities and small companies (covering almost all early-stage and SME OÜs) do not require a statutory audit. A voluntary audit is permitted — some OÜs commission one for investor relations, lending purposes, or shareholder comfort — but it is not legally required. If your OÜ is approaching the audit threshold, we flag this in advance so you can plan.

XBRL (eXtensible Business Reporting Language) is the digital reporting format required by the Estonian Business Register for annual report submission. When we prepare your annual report through the e-aruandlus portal, the financial statements are automatically structured in XBRL format by the portal’s built-in tools. You do not need to understand or create XBRL yourself — this is handled as part of the submission process. What matters is that the underlying financial data is correct; the XBRL tagging is a technical submission format. We work directly in the e-aruandlus portal, where the financial data entry automatically generates the required XBRL output for submission to the Äriregister.