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.

Merit Aktiva EMTA e-Tax LHV Bank Feed E-invoice DigiDoc Cloud Storage Digital Payroll Zero Paper
100% Paperless
0 Office Visits
Live Real-time Access
API Bank Integration
e-ID Digital Signing
7 yr Digital Retention

What Makes Estonian Accounting Ideally Suited to Being Fully Online

EMTA operates entirely through digital channels
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.
E-ID and Smart-ID enable digital signing of all documents
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.
Estonian banks provide API-based transaction feeds
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.
The Business Register is fully digital
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.
E-invoices (e-arved) are the Estonian standard for B2B
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.
Digital document retention is fully legal
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
Why we use Merit Aktiva and not international tools
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.

1
Sender (your OÜ)
2
E-invoice network
3
Recipient accounting system
4
Confirmation

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

Frequently Asked Questions

For a client using our full outsourced accounting service, you do not need to use Merit Aktiva at all — we handle all data entry and filing within it. Your interaction is limited to the read-only client portal, where you can view your P&L, balance sheet, and issued invoices. The portal requires no accounting knowledge — it is simply a dashboard showing your financial position. If you want to learn Merit Aktiva more actively (for example, to issue your own invoices directly in the system), Merit Aktiva provides Estonian-language tutorials and we are available to walk you through the invoice module in a 15-minute screen-share call. Most clients become comfortable with basic navigation within 1–2 sessions.

Yes — the Raamatupidamise seadus fully permits electronic accounting records stored in cloud systems, provided the data is: legible and accessible throughout the 7-year retention period; protected from unauthorised modification (audit trail maintained); and backed up to prevent data loss. Merit Aktiva meets all three requirements: it maintains an immutable audit log of all changes, is hosted in EU data centres compliant with GDPR and Estonian data protection law (Isikuandmete kaitse seadus), and provides automatic backups. From an EMTA perspective, your filed declarations are also stored in the EMTA e-Tax portal independently of your accounting software — so even if your software provider ceased operations, your EMTA records remain accessible.

For routine monthly accounting, no e-ID is needed from you — your accountant handles all EMTA filings via their own authorisation. The situations requiring your digital signature are: signing the annual report before Business Register submission, signing board resolutions for dividend distributions, and signing the initial service agreement with us. If you do not have an Estonian e-ID, you have three alternatives: (1) Mobile ID or Smart-ID — if you have a registered Estonian phone number; (2) Electronic signature with your home country’s digital ID — Estonia’s e-Äriregister accepts some foreign digital IDs; (3) Notarised power of attorney — for documents requiring a signature, you can grant a notarised power of attorney to someone with an Estonian e-ID. The notarised POA route is the universal fallback and works for all document types.

Yes — we accept any machine-readable format. PDFs are the most common and simplest: forward the email or upload to the shared folder. XML e-invoices from EU suppliers can be imported directly into Merit Aktiva. Word documents we convert manually. The key requirement is that the document contains all mandatory fields for an accounting source document: supplier name, date, amount, description, and VAT number if the supplier is VAT-registered. A foreign supplier who is not VAT-registered sends invoices without VAT — that is correct and acceptable. For EU B2B suppliers where reverse charge applies (the supplier charges 0% VAT and you self-assess), ensure the invoice includes the supplier’s VAT number and a note that reverse charge applies.

We always file by the deadline regardless of late documents — this is our core commitment. In practice: if documents arrive after our internal cut-off (typically 5th of the month for the prior month), we file the TSD and KMD based on the information we have, and correct in the following month if new information arrives. For payroll specifically, we need payroll data by the 3rd — if we do not have it, we file based on the prior month’s payroll and issue a correction amendment the following month. We contact you proactively if documents are missing or late, before the deadline — not after. EMTA accepts corrected declarations with no penalty as long as any additional tax due is paid with interest. Missing documents are never an excuse for a late filing — the filing happens on time and corrections follow.

Ready for fully digital accounting — no paper, no office visits?

Book a free 30-minute consultation. We configure Merit Aktiva, connect your bank feed, set up document workflows, and take over all EMTA filings — entirely online from day one.

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