Online Accounting for Estonian OÜs
How fully digital, cloud-based accounting works for Estonian companies — Merit Aktiva setup, EMTA e-Tax integration, bank feeds, e-invoices, digital document storage, and how to manage everything without paper or office visits.
What Makes Estonian Accounting Ideally Suited to Being Fully Online
The Estonian Tax and Customs Board (EMTA) has operated a fully digital e-Tax portal since 2001. All TSD declarations, KMD returns, information requests, and correspondence are handled electronically. There is no requirement to visit an EMTA office for any routine tax matter.
Estonia’s digital identity infrastructure — the e-ID card, Mobile ID, and Smart-ID — allow legally binding electronic signatures on any document. Annual reports, board resolutions, service agreements, employment contracts, and EMTA submissions are all signable digitally without printing.
LHV Pank’s LHV Connect API, SEB’s banking API, and Coop Pank’s data export enable automatic daily transaction feeds into accounting software. For most OÜs, bank statement reconciliation is fully automated — no manual data entry.
Company registration, annual report filing, shareholder changes, and board member updates all happen through the e-Äriregister portal. A notarised physical visit is only required for specific corporate actions involving notarially verified transactions.
The Estonian e-invoice (e-arve) standard allows businesses to send structured XML invoices directly to accounting systems via the Finbite or Telema network. For government suppliers, e-invoicing is mandatory. For B2B, it eliminates manual invoice capture and reduces errors.
The Raamatupidamise seadus (Accounting Act) allows accounting records to be kept in electronic form throughout the 7-year retention period. No physical archive of paper invoices or receipts is required — cloud storage of PDF and digital originals is legally sufficient.
What does ‘online accounting’ mean for an Estonian OÜ? It means your entire accounting workflow — from capturing invoices to filing EMTA declarations to signing the annual report — happens digitally, without printing, posting, or office visits. Your accountant works in Merit Aktiva connected to EMTA via API. You interact through email, a shared document folder, and your bank’s internet portal. The end result is the same as traditional accounting, but faster, cheaper, and accessible from anywhere in the world.
Section 1 — The Digital Tool Stack
Every task in the accounting workflow — which tool handles it and what you need to do
Your Role vs Your Accountant’s Role in the Online Workflow
In a well-set-up online accounting workflow, your monthly involvement is under 30 minutes. The table below shows every accounting task, the tool that handles it, where data lives, and — crucially — what action you need to take versus what your accountant handles automatically. The green ‘What You Need to Do’ column shows how minimal your input actually is.
| Task | Tool Used | Where It Lives | What You Need to Do |
|---|---|---|---|
| Monthly bookkeeping | Merit Aktiva | Cloud — accessible from browser anywhere | Nothing — your accountant posts transactions; you can view in real time |
| Bank transaction import | LHV Connect API / SEB / Coop bank feed | Automatic — daily feed from Estonian bank | Connect bank feed once during setup; runs automatically thereafter |
| Sales invoice creation | Merit Aktiva invoice module | Cloud — create from browser or mobile | Create invoice in Merit Aktiva or send PDF; your accountant captures it |
| Purchase invoice capture | Email forward / Google Drive upload | Email or shared cloud folder | Forward supplier email invoices to accounting email address |
| Expense receipt submission | Email photo or app upload | Email or shared cloud folder | Photograph receipt with phone; send to accounting email immediately |
| EMTA KMD filing (VAT return) | Merit Aktiva → EMTA e-Tax API | EMTA e-Tax portal — filed electronically | Nothing — your accountant files via esindusõigus delegation by 20th |
| EMTA TSD filing (payroll) | Merit Aktiva payroll → EMTA e-Tax API | EMTA e-Tax portal — filed electronically | Confirm payroll changes by 3rd of month; your accountant files by 10th |
| E-invoicing (e-arve) | Merit Aktiva e-invoice module | Estonian e-invoice network (Telema, Finbite) | Your accountant enables e-invoice sending; clients connect their system |
| Annual report signing | DigiDoc4 + e-ID card / Mobile ID | Local signing tool + email delivery | Sign the PDF we prepare using your e-ID; takes under 2 minutes |
| Business Register filing | e-Äriregister portal | Business Register online system | Your accountant files via portal; you confirm details before submission |
| Document retention | Merit Aktiva + cloud backup | Cloud — GDPR-compliant storage | 7-year retention automated; no physical filing cabinets needed |
| Payroll slips to employees | Merit Aktiva payroll module | Email delivery to employee | Nothing — slips generated and emailed by your accountant after TSD filing |
| Dividend resolution signing | DigiDoc4 + e-ID / Mobile ID | Digital signature container (.bdoc) | Sign board resolution document using e-ID; email to accountant |
Section 2 — Merit Aktiva: Estonia’s Standard Accounting Platform
Why Merit Aktiva is the right choice and how it is configured for your OÜ
What Merit Aktiva Provides
Merit Aktiva is an Estonian cloud accounting platform built specifically for Estonian legal, tax, and reporting requirements. Unlike international platforms that require Estonian-specific configuration workarounds, Merit Aktiva has EMTA integration, Estonian payroll, e-invoice support, and the Estonian annual report format built in natively.
| Merit Aktiva Feature | What It Does | Estonian Compliance Benefit |
|---|---|---|
| EMTA e-Tax API | Directly submits TSD and KMD declarations from Merit Aktiva to EMTA without re-entering data | Eliminates manual data transfer; reduces filing errors; provides submission confirmation directly in software |
| Estonian payroll module | Calculates TSD-compliant payroll: social tax (33%), income tax (22%), employer and employee UI, II pillar pension | Pre-configured Estonian tax rates; no manual rate updates when EMTA changes basic exemption (€700/month for 2026) |
| E-invoice (e-arve) module | Sends and receives Estonian standard e-invoices via Finbite and Telema networks | Required for Estonian government suppliers; eliminates manual invoice capture from B2B partners using e-invoicing |
| Estonian chart of accounts | Pre-built RTJ and IFRS-compatible chart of accounts for Estonian OÜs | Correct account codes for Business Register annual report format; no mapping required |
| Annual report generation | Generates the majandusaasta aruanne in the format required by the Business Register | Directly produces the PDF for e-Äriregister submission; RTJ micro/small/medium entity formats supported |
| Bank feeds | Direct integration with LHV Connect API, SEB, Swedbank, and Coop Pank | Daily automatic transaction import; reduces manual bank reconciliation to exception handling |
| Client portal | Read-only access for OÜ owner to view real-time accounts, issued invoices, and filed declarations | You can check your P&L and balance sheet at any time without waiting for a monthly report |
| Multi-user access | Accountant has full access; OÜ owner has read-only or co-owner access; bookkeeper roles configurable | Secure role-based access; audit trail of all changes; no shared passwords |
Software Comparison — Merit Aktiva vs Alternatives
Accounting Software Comparison — Estonia Focus
| EMTA API integration | ||||
| Estonian payroll (TSD) | ||||
| E-invoice (e-arve) | ||||
| Estonian annual report | ||||
| LHV bank feed | Partial | |||
| Client read-only access | ||||
| Mobile app | ||||
| Estonian language UI | ||||
| Monthly price (approx.) | €20–45 | €15–30 | €30–65 | €25–80 |
International accounting platforms (Xero, QuickBooks, Sage) lack native EMTA integration, Estonian payroll calculation, e-invoice support, and Business Register annual report export. Merit Aktiva eliminates these steps and provides a single system for all Estonian compliance tasks.
Section 3 — EMTA’s Digital Services
Every digital service EMTA provides and how your accountant uses them
The EMTA e-Tax Portal — What Is Available
The EMTA e-Tax portal (e-MTA, accessible at emta.ee) is the single point of contact for all Estonian tax administration. Once your accountant is granted esindusõigus (authorised representative access), they can perform all of the following on your behalf without requiring your involvement:
| EMTA Digital Service | What It Does | Access Method | When Used |
|---|---|---|---|
| e-Tax portal (e-MTA) | Central filing hub for TSD, KMD, income declarations, information requests | Log in with e-ID, Mobile ID, or Smart-ID; or via esindusõigus delegation by accountant | Every month for TSD and KMD; when EMTA contact is needed |
| TSD declaration filing | Submit monthly payroll tax declaration — social tax, income tax, UI, II pillar | EMTA e-Tax portal → Declarations → TSD | By 10th of each month following payroll period |
| KMD declaration filing | Submit monthly VAT return — output VAT, input VAT, net position | EMTA e-Tax portal → Declarations → KMD | By 20th of each month (if VAT-registered) |
| OSS module | File quarterly One-Stop-Shop VAT return for EU B2C sales | EMTA e-Tax portal → OSS module | Within 30 days of each quarter end |
| Töötamise register | Register employees before first day; update employment status changes | EMTA e-Tax portal → Employment Register | Before each new hire; on termination; any status change |
| Esindusõigused (representations) | Grant or revoke accountant access to file on OÜ’s behalf | EMTA e-Tax portal → Company settings → Representations | Once on setup; revoke on accountant change |
| Tax debt overview | Check outstanding EMTA balances, interest, and payment status | EMTA e-Tax portal → Tax accounts | Monthly to confirm TSD/KMD payments received |
| Advance ruling application | Request binding EMTA ruling on tax treatment of specific transaction | EMTA e-Tax portal → Applications → Advance ruling | When novel transaction has uncertain tax treatment |
| Information requests | Respond to EMTA queries about declared income, transactions, or tax positions | EMTA e-Tax portal → Correspondence | When EMTA sends a query; handled by accountant via esindusõigus |
How EMTA Sends You Information
EMTA communicates with OÜs through the e-Tax portal’s messaging system — not by postal mail for most communications. Important notices (audit selections, information requests, assessment decisions) appear in the portal’s inbox. Your accountant monitors this on your behalf via the esindusõigus delegation and flags anything that requires your decision or awareness.
| EMTA Communication Type | Delivered Via | Urgency | Your Accountant’s Action |
|---|---|---|---|
| Information request (teabenõue) | e-Tax portal messages | Medium — typically 30 days to respond | We draft the response and submit; flag to you if your input is needed |
| Assessment (maksuotsus) | e-Tax portal + registered mail | High — legal document with appeal deadlines | We review immediately; advise on response; appeal if warranted within deadline |
| Audit notification (maksukontroll) | e-Tax portal + registered mail | High — respond and cooperate | We coordinate the audit; prepare documentation; attend as your representative |
| Refund notification | e-Tax portal | Low — informational | We confirm receipt; verify amount is correct; notify you |
| Reminder on outstanding declaration | e-Tax portal | High — deadline may have passed | We investigate immediately; file if missed; calculate interest due |
Section 4 — Bank Feeds and E-invoices
Automating the data-heavy parts of accounting
LHV Connect API — The Gold Standard Bank Feed
LHV Pank’s LHV Connect API is the most complete bank integration available for Estonian accounting software. It provides a direct daily feed of all transactions from your LHV business account into Merit Aktiva — including transaction amounts, counterparty names, payment references, and timestamps. This eliminates the need to manually download and upload bank statements each month.
Once configured (a one-time setup between LHV and Merit Aktiva), the feed runs automatically. Your accountant reviews and categorises the auto-imported transactions, applies any matching rules (e.g. monthly SaaS subscription always maps to the same expense account), and reconciles the balance. The result: bank reconciliation takes minutes rather than hours.
| Bank | Feed Method | Setup Required | Update Frequency | Best For |
|---|---|---|---|---|
| LHV Pank | LHV Connect API (native Merit Aktiva integration) | One-time API connection in LHV portal + Merit Aktiva | Daily automatic | Primary recommendation for most Estonian OÜs |
| Coop Pank | CSV export / API (Merit Aktiva integration available) | One-time connection; some manual config | Daily or on-demand | Good alternative; lower fees |
| SEB | SEB Connect API (available with business account) | One-time SEB portal setup | Daily | Works well; slightly more complex setup |
| Swedbank | CSV export; limited API support | Manual CSV export and import | Manual — on each statement download | Less automated; acceptable for low-volume companies |
| Wise Business | CSV export; no direct Merit Aktiva API | Manual CSV import each month | Manual | For international payments; supplement with Estonian IBAN at LHV |
E-invoicing (E-arve) — How It Works
The Estonian e-invoice (e-arve) is a structured XML invoice that transfers directly between accounting systems via the Finbite or Telema network — eliminating the need to email PDF invoices and manually enter them on the recipient’s side. For government and large corporate clients, e-invoice capability is often required. For other B2B relationships, it speeds up invoice processing and eliminates entry errors.
Document Capture Without Scanning or Paper
Online accounting is only fully paperless if source documents are captured digitally at the point of receipt. For an Estonian OÜ using our online accounting service, the recommended document flow eliminates all paper handling.
| Document Type | How to Send It to Us | Time Required | Why This Format |
|---|---|---|---|
| E-mail invoices from suppliers | Forward the email as-is to your accounting email address | 10 seconds per invoice | Email timestamp = document date; original format preserved; searchable archive |
| PDF invoices received by post (rare) | Photograph with phone or scan; email to accounting address | 30 seconds | Physical documents should be digitised immediately; originals may be discarded after scanning per Raamatupidamise seadus |
| Cash register receipts (kassatšekid) | Photograph immediately; email to accounting address | 30 seconds | Paper receipts fade; photograph the same day; include the description of what was purchased in the email subject line |
| Fuel receipts | Photograph at the pump; email with vehicle registration in subject | 30 seconds | Fuel deductibility requires vehicle + business purpose documentation |
| Bank statement | Automatic via bank feed (LHV) or CSV download (others) | 0–2 minutes | Bank feed eliminates this entirely for LHV clients |
| Payroll changes (new hire, salary change) | Email to accountant with the details | 5 minutes | Employment register must be updated before first day of work; earlier notice = cleaner TSD filing |