DATEV

What Is DATEV?

German accounting has a problem that no Silicon Valley startup can solve. Tax law in Germany is among the most complex in Europe, with over 40 different tax types, mandatory electronic filing via ELSTER, and chart-of-accounts standards (SKR03 and SKR04) that foreign software simply does not support. For sixty years, one organisation has owned this problem: DATEV eG.

Founded in 1966 by 65 tax agents in Nuremberg, DATEV is a registered cooperative (eingetragene Genossenschaft) — not a startup, not a corporation, and emphatically not for sale. Membership is restricted to tax advisors, auditors, and attorneys. This structure means no private equity firm can acquire it, no investor can pressure it to cut corners, and its 8,900 employees serve their members rather than shareholders. The cooperative generated EUR 1.44 billion in revenue in 2023 and processes a significant share of all German tax returns.

DATEV's software covers the full spectrum: financial accounting (Kanzlei-Rechnungswesen), payroll (LODAS and Lohn und Gehalt), annual financial statements, document management, and the cloud-based Unternehmen online portal for business-advisor collaboration. More than 2.8 million German businesses interact with DATEV-powered systems through their tax advisors.

Key Features

German Tax Integration

DATEV's deepest advantage is its direct integration with German fiscal infrastructure. ELSTER electronic tax filing is built in, not bolted on. VAT prepayment returns, trade tax declarations, income tax returns, and annual financial statements flow directly from the accounting system to the Finanzamt. The system maintains all mandatory German chart-of-accounts standards, with industry-specific variants for over 200 business types. No other accounting platform matches this depth of German regulatory coverage.

The Advisor-Client Ecosystem

DATEV Unternehmen online is the bridge between businesses and their tax advisors. Companies capture receipts (via smartphone scan or email forwarding), import bank transactions, and share documents through a cloud portal hosted in DATEV's own German data centres. The tax advisor accesses the same data in Kanzlei-Rechnungswesen, processes the accounting, and files returns — all within a single ecosystem. This tight coupling eliminates the data exports and format conversions that plague multi-tool workflows.

Payroll Processing

German payroll is notoriously complex: church tax, solidarity surcharge, social insurance contributions, and regional variations create a compliance minefield. DATEV's payroll modules (LODAS for cloud-based processing, Lohn und Gehalt for on-premise) handle the full calculation and filing chain. Regulatory updates — and there are many — arrive automatically. For businesses with employees across multiple German states, this automation is not optional but essential.

DATEVconnect and the Partner Ecosystem

The DATEV Marktplatz hosts over 400 certified integrations from third-party providers. DATEVconnect online provides REST API access for pushing invoices, receipts, and booking records from external systems like Xentral, Personio, or Shopify. Authentication uses DATEV's SmartLogin app (two-factor via QR code). The developer portal documents the Rechnungsdatenservice API for invoice transfer and DATEVconnect Kontobuchungen for posting batches.

Data Security and German Hosting

All DATEV data lives in the cooperative's own data centres in Nuremberg and Feucht. No data leaves Germany. The company holds ISO 27001 (information security), ISO 27701 (privacy management), ISO 27017 (cloud security), and ISO 20000 (IT service management) certifications. For German businesses handling sensitive financial data, this is the gold standard.

Pricing

DATEV's pricing is the platform's most frustrating aspect for outsiders. Core products like Kanzlei-Rechnungswesen and LODAS are priced through the cooperative and typically accessed via a tax advisor relationship. Individual businesses cannot simply sign up for a subscription.

The exception is DATEV Unternehmen online, available directly to businesses at EUR 10.50 per month. This covers cloud-based document exchange, receipt capture, and bank transaction import — essentially the collaboration layer between a company and its Steuerberater. Storage costs scale with volume.

DATEVasp, the fully hosted desktop environment, bundles all DATEV applications with managed infrastructure and automatic updates. Pricing is custom and typically negotiated through the advisory firm. For a small business working with a DATEV-connected tax advisor, the effective cost is often bundled into the advisor's monthly fee. The total cost of ownership is competitive for the German market, but opaque compared to the transparent per-seat pricing of lexoffice or sevDesk.

EU Compliance & Privacy

DATEV is about as EU-compliant as software gets. A German cooperative, headquartered in Nuremberg, with German-only data centres and ISO certifications across security, privacy, and cloud operations. There are no US parent companies, no transatlantic data transfers, and no ambiguity about jurisdiction.

The cooperative structure adds an additional layer of institutional stability. DATEV cannot be acquired — its legal form as an eG (eingetragene Genossenschaft) prevents investor takeovers. For organisations evaluating long-term vendor risk alongside GDPR compliance, this is a structural guarantee that no SaaS startup can offer.

ISO 27701 certification specifically validates DATEV's privacy management system against GDPR requirements, making the certification directly relevant rather than just an adjacent security marker.

Who It's Best For

German tax advisory firms (Steuerberatungskanzleien) managing multiple clients' accounting, tax, and payroll. DATEV is the industry standard, and deviating from it creates friction with the Finanzamt and with clients.

German SMEs working with a tax advisor who need a structured document exchange and collaboration workflow. Unternehmen online at EUR 10.50 per month is the lowest-friction path.

Enterprises requiring German data sovereignty for financial data. The combination of cooperative ownership, German-only hosting, and comprehensive ISO certifications satisfies the most demanding compliance requirements.

Organisations outside the DACH region should look elsewhere. DATEV's value is inseparable from the German regulatory framework it was built to serve.

The Verdict

DATEV is not a product you choose — it is a system you enter. For German tax professionals and the businesses they serve, it remains unmatched in regulatory depth, institutional stability, and data sovereignty. The interface is dated, the pricing is opaque, and the cloud transition is incomplete. But no competitor offers DATEV's combination of ELSTER integration, cooperative independence, and sixty years of German tax expertise. The question for German businesses is not whether DATEV is the best accounting software. It is whether your Steuerberater uses anything else.

Frequently Asked Questions

Is DATEV GDPR compliant?

Yes. DATEV eG is a German cooperative with all data centres in Nuremberg and Feucht, Germany. The company holds ISO 27001, ISO 27701 (privacy management), and ISO 27017 (cloud security) certifications. No data is processed or stored outside Germany.

Can businesses use DATEV without a tax advisor?

DATEV Unternehmen online is available directly to businesses for EUR 10.50 per month. However, the full accounting suite (Kanzlei-Rechnungswesen, LODAS) is designed for tax professionals. DATEV's cooperative membership is restricted to tax advisors, auditors, and attorneys.

How does DATEV compare to lexoffice or sevDesk?

lexoffice and sevDesk are self-service cloud accounting tools aimed at freelancers and small businesses. DATEV is a professional-grade system built for tax advisors managing hundreds of clients. The products serve fundamentally different users. If you handle your own accounting, choose lexoffice or sevDesk. If you work with a Steuerberater, DATEV is likely already involved.

Does DATEV have an API?

Yes. DATEVconnect online provides REST API access for data exchange, and the Rechnungsdatenservice API enables invoice and receipt transfer from third-party systems. The DATEV Developer Portal documents all available interfaces. Authentication requires SmartLogin (two-factor).

Is DATEV suitable for businesses outside Germany?

DATEV is optimised for the German tax and regulatory framework, including SKR chart of accounts, ELSTER filing, and German payroll law. It has limited utility outside the DACH region. Businesses in other EU countries should consider Holded (Spain), Billomat, or country-specific alternatives.