Key Takeaways
- DATEV is used by over 95% of German tax advisors to prepare their clients' accounts and returns.
- Every German VAT return reaches the Finanzamt through ELSTER, whichever software prepared it. What the tax office checks is the content of the return.
- Generic accounting software (QuickBooks, Xero, SAP) cannot export DATEV-compatible formats without custom conversion, this creates delays and errors.
- Vaytax generates DATEV-native files directly from client data, enabling direct import by the tax advisor without manual re-entry or reformatting.
Sources: BZSt, UStG, EU VAT Directive 2006/112/EC.
If you're a foreign company doing business in Germany, you'll inevitably encounter DATEV. It is the software most German tax advisors work in, so the format your data arrives in decides how smoothly an advisor can take it over.
What Is DATEV?
DATEV eG is a German software cooperative founded in 1966, originally by and for tax advisor (licensed tax advisors). Today, it is the dominant tax and accounting software ecosystem in Germany, used by over 95% of all tax advisor and Wirtschaftsprüfer (auditors).
Think of DATEV not as a single product, but as an entire ecosystem:
- DATEV Unternehmen online, The cloud platform where businesses and their advisors exchange documents
- DATEV Kanzlei-Rechnungswesen, The core accounting module used by tax offices
- DATEV ELSTER integration, Direct electronic submission to German tax authorities
- DATEV Datenservice, Standardised data import/export formats
When a German tax advisor says they "use DATEV," they mean their entire workflow, from receiving your data to validating it to filing your returns, runs through this system.
Why DATEV Matters for Foreign Companies
Here's the reality most foreign companies don't learn until it's too late: the Finanzamt cares whether what you file is right, complete and on time.
Every German VAT return reaches the Finanzamt through ELSTER, the tax authority's own electronic filing system, whichever software prepared it. What draws follow-up questions is the content: figures that do not add up, missing supporting documents, or returns filed late. Over 95% of German tax advisors use DATEV to prepare their clients' figures, which is why a DATEV-ready export matters when you work with one.
For foreign companies registered for German VAT, this matters because:
- You're already under more scrutiny as a non-resident taxpayer
How DATEV Works in Practice
The typical DATEV workflow for VAT compliance follows a clear chain:
- Data collection, The company (or its provider) prepares transaction data: sales, purchases, intra-community deliveries, and reverse charges
- Import into DATEV, The tax advisor imports the data into DATEV Kanzlei-Rechnungswesen using a standardised format (typically DATEV-CSV or XLSX)
- Validation, DATEV runs automatic checks: tax codes, VAT rates, account assignments, and plausibility checks
- Review & correction, The tax advisor reviews flagged items and corrects any issues
- ELSTER submission, The completed UStVA (VAT return) is submitted electronically to the Finanzamt via DATEV's built-in ELSTER interface
This entire pipeline is designed for consistency and traceability. Every step is logged, every change is documented, and the final submission carries the digital signature of a licensed advisor.
The DATEV ZMSD Format
At the technical level, DATEV structures VAT-related data in a specific format known as ZMSD (EU sales list (Zusammenfassende Meldung) Stammdaten). This format has two core components:
- Stammdaten (master data), Company details, VAT registration numbers, tax office assignments, and fiscal year configuration
- Bewegungsdaten (transaction data), The actual VAT transactions: amounts, tax codes (Buchungsschlüssel), counter-accounts, and dates
Both components must follow DATEV's prescribed field structure, encoding, and validation rules. Even small deviations, a wrong date format, a missing tax code, an improperly mapped account, will cause the import to fail or require manual correction.
⚠ Generic accounting exports don't work. A CSV export from QuickBooks, Xero, or even SAP is not DATEV-compatible out of the box. The field structure, tax code mappings, and encoding requirements are specific to DATEV. Without proper formatting, your tax advisor must re-enter everything manually, which costs time, money, and introduces errors.
What Foreign Companies Typically Get Wrong
We see the same mistakes repeatedly:
1. Using generic accounting software without DATEV integration
Most international accounting tools (QuickBooks, Xero, FreshBooks, Zoho Books) have no DATEV export capability. The data they produce must be manually translated before a German tax advisor can use it. This creates delays, increases costs, and raises error risk.
2. Assuming the tax advisor will "figure it out"
Even a good tax advisor can only work with the data they receive. If your transaction data arrives in a non-standard format, they'll spend billable hours reformatting it, or worse, make assumptions that lead to incorrect filings.
DATEV vs. Non-DATEV Workflow: A Comparison
| DATEV Workflow | Non-DATEV Workflow | |
|---|---|---|
| Data format | DATEV-native XLSX/CSV with correct field mapping | Generic CSV or manual spreadsheets |
| Import | Direct import into DATEV, seconds | Manual re-entry or custom conversion, hours |
| Validation | Automatic DATEV plausibility checks | Manual review only, higher error risk |
| Cost to you | Lower, no manual rework needed | Higher, advisor charges for reformatting |
| Error rate | Low, automated checks catch issues | Higher, manual processes introduce mistakes |
| Audit readiness | Complete, documented record | Fragmented records, harder to reconstruct |
How Vaytax handles it
Vaytax was built for foreign companies that need their German VAT handled the way a German tax advisor would handle it. Here is how it works:
- You confirm your figures in our English client area: copy last month, upload your sales report, or type them in.
- A licensed German tax advisor reviews the return.
- We file it through our own direct connection to ELSTER, the German tax authority's filing system. ELSTER's own checks run before it leaves.
- ELSTER answers with its official receipt number, which you see on the return in your dashboard.
The result: your returns reach the Finanzamt in the same electronic form every German tax advisor's filings take, with a receipt for each one. Every filing is checked, documented and traceable, so if the Finanzamt ever has questions, the full record is on file.
Related guides:
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Frequently Asked Questions
Why does DATEV matter for foreign sellers in Germany?
DATEV is the dominant accounting and tax software in Germany, used by most licensed tax advisor firms to prepare their clients' figures. For a foreign seller it matters mainly at the handover: if your bookkeeping can be exported in a DATEV-ready format, a German tax advisor can take it over without re-entering it. The return itself reaches the Finanzamt through ELSTER, the tax authority's filing system, whichever software prepared it; Vaytax files through its own direct connection to ELSTER.
Do I need DATEV myself as a foreign seller?
No. DATEV is an enterprise software stack used by the Steuerberater. As a Vaytax customer you never log into DATEV or pay a DATEV licence. We file your returns through our own direct connection to ELSTER, under our tax advisor's authorisation; you only see the English client area, the ELSTER receipt for each return and the resulting Bescheide.
Can my old accountant export DATEV data so I can switch?
Yes. DATEV supports standard export formats (DATEV CSV, ASCII-Postversandformat) that any DATEV-enabled firm can read. When switching to Vaytax, your prior accountant exports your prior-period filings, usually as a DATEV export, and we continue from there. The switch typically takes one to two weeks including power of attorney (Vollmacht) change-of-authority paperwork with the Finanzamt.
Does Vaytax use DATEV for every customer?
Not for filing. Since September 2026 we file German returns (monthly and quarterly returns, the annual return and the EC sales list) through our own direct connection to ELSTER, the German tax authority's filing system. You confirm your figures in the English client area, and each return shows its ELSTER receipt there.
What is the difference between DATEV and ELSTER?
DATEV is the accounting and tax-prep software the Steuerberater uses. ELSTER is the Finanzamt's electronic filing portal. DATEV prepares the return; ELSTER receives it. Filings flow DATEV → ELSTER → Finanzamt.