Annual Reports & Deadlines for Estonian OÜs: A Compliance Calendar
Every recurring obligation an Estonian OÜ has, laid out by date.
The annual report is the compliance obligation most e-resident founders underestimate, usually because they conflate "no activity" with "no filing required." Estonia requires every company to submit a report each year regardless of whether it did anything during that year. Missing the deadline triggers a predictable escalation: reminders, then formal warnings, then fines on the company and personally on each board member, then in persistent cases the deletion of the company from the register. This guide covers the rules, the deadlines, and what the filing actually involves in practice.
Who must file
Every company registered in the Estonian Commercial Register must submit an annual report. This means:
- Active OÜs with revenue and activity
- Dormant OÜs with zero transactions
- Newly registered companies, even in their first partial year
- Companies owned or managed by e-residents, on exactly the same terms as locally-owned companies
There is no exemption based on size, revenue, nationality of the owner, or whether the company is currently generating income. If the company exists in the register, the report is due.
Deadlines
| Situation | Deadline |
|---|---|
| Financial year ended 31 December 2025 | 30 June 2026 |
| Financial year ended on any other date | Six months after that end date |
| Company registered mid-year (e.g. October 2025) | First financial year can run up to 18 months; a company registered October 2025 with a calendar year files its first report by 30 June 2027, covering October 2025 through December 2026 |
Many founders who register mid-year assume their first deadline is six months after their registration date. It isn't. The deadline is six months after the end of their first financial year, which for a calendar-year company may be 18 months away. Confirm your first financial year end date with your accountant at registration, not when the filing window opens.
What the annual report actually contains
The exact requirements depend on company size. Most e-resident OÜs qualify as micro-entities, which have the simplest requirements. A company qualifies as micro if it does not exceed two of the following three thresholds in two consecutive years: total assets of €175,000; net turnover of €350,000; average of ten employees during the financial year. Most solo or small remote businesses fall comfortably within this.
For a micro-entity, the annual report typically includes:
- A balance sheet showing the company's financial position at year end
- A profit and loss statement (income statement) for the year
- Notes to the financial statements (simplified for micro-entities)
- A management report: a narrative description of activity, or for dormant companies, a statement confirming no activity took place and what plans exist for the company
- A profit distribution proposal and shareholder resolution
For a zero-activity company, the "management report" section still needs to be completed, briefly explaining why the company was inactive and what the intentions are. It's a genuine document, not just a checkbox.
The XBRL format requirement
Since 2022, the Estonian Business Register only accepts annual reports in XBRL format. PDF, Word, and Excel submissions are no longer valid. XBRL is a machine-readable structured data format conforming to the Estonian accounting taxonomy. In practice, this means you either use accounting software that generates valid XBRL output (several Estonian cloud accounting platforms handle this), or you use an accountant who does it for you.
The report must also be digitally signed before submission, using an e-Residency card, Mobile-ID, or Smart-ID. For e-resident founders, the e-Residency card covers this requirement.
What happens if you miss the deadline
Missing the deadline triggers a predictable escalation sequence under the Estonian Commercial Code:
- The Business Register issues a formal reminder
- If unfiled, a formal warning follows
- Fines of up to €3,200 can be imposed on the company and on each board member personally
- In persistent cases, the company can be forcibly deleted from the Commercial Register
Beyond fines, there are practical downstream consequences. Banks and EMIs regularly check the reporting status of their clients. A company with a missing or overdue annual report is a visible compliance flag that can result in account review or closure. Late filing is also visible in the public Business Register, since all Estonian annual reports are publicly accessible once filed.
Full compliance calendar for a typical OÜ
Annual report filing is the most prominent obligation, but it isn't the only recurring compliance item for an active company.
| Obligation | Frequency and deadline |
|---|---|
| Annual report | Yearly, within 6 months of financial year end (usually 30 June for calendar-year companies) |
| VAT return (if VAT registered) | Monthly, by the 20th of the following month via e-MTA portal |
| Payroll tax return / TSD (if paying salaries or board member fees) | Monthly, by the 10th of the following month |
| Corporate income tax on distributions | Declared and paid when a distribution is made, via e-MTA |
| Security/defence tax (2026 to 2028, companies with profit) | Quarterly advance payments based on prior year profits |
| VAT registration threshold check | Ongoing monitoring, register when taxable annual turnover exceeds €40,000 |
Frequently asked questions
My company did nothing all year. Do I really have to file?
Yes. A zero-activity or dormant company still requires an annual report. The filing is called a zero report and it must include a balance sheet, profit and loss statement, notes, and a management report explaining the inactivity. The state fee for filing is nil, but you still need to prepare and submit the document correctly.
Can I file the annual report myself without an accountant?
Yes, for a dormant or very simple company with minimal transactions. You need to understand the XBRL format requirement and Estonian accounting basics, or use an accounting platform that handles the export for you. As activity increases (VAT registrations, dividends, employees, complex transactions), professional accounting becomes practically necessary rather than optional.
What does annual report preparation typically cost?
For a fully dormant company with no transactions, some accountants offer zero-report preparation as a flat-fee service starting around €50. For an active company that has been properly bookept throughout the year, annual report preparation is usually included in or adjacent to the ongoing monthly accounting fee. The cost of getting it wrong or missing the deadline consistently exceeds the cost of professional support.
Does e-Residency card expiry affect my ability to file?
Yes, practically. The annual report must be digitally signed, and your e-Residency card is your signing mechanism. If your card has expired and you haven't renewed it, you lose the ability to sign documents for the company, which can block the filing itself. Renewing before expiry rather than after is considerably easier.