Specialization · API & Backend Development

DATEV Integration: Send Booking Data to Your Tax Firm Auto­mati­cally

We build the DATEV integration for your online store, ERP or custom software – so invoices, payments and receipts reach your tax firm without retyping. Data is handed over through the official DATEV data formats and interfaces and coordinated with your tax firm.

Initial consultation freeQuote transparent, fixed price if preferredArea API & Backend Development
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Short & clear

A DATEV integration passes booking data such as outgoing invoices, payments, debtors and creditors from your shop, ERP or custom software to DATEV in a structured way – as a file in DATEV format (booking batch, or Buchungsstapel) or through DATEV's official online interfaces. Nano Concepts builds the connection to your system, aligns account coding and workflow with your tax firm, and tests with real receipts. A clearly scoped export is possible in the Starter package from €2,500, multiple data sources in the Professional package from €8,000 – the exact quote follows after the free initial consultation.

DATEV integration with Nano Concepts

A DATEV integration makes sure that booking data from your online store, your ERP or your custom software reaches your tax firm automatically – instead of as a printed list, a pile of PDFs or a manually maintained Excel file. We build the connection so that outgoing invoices, incoming payments, debtors and creditors are handed over in the right format: as a booking batch in DATEV format (Buchungsstapel) that your tax firm imports directly, or through DATEV's official online interfaces when the prerequisites are met. The result is fewer follow-up questions and a month-end close that no longer stalls on the data handover.

01

Many accounting programs, such as those from Lexware, already include a DATEV export. A custom DATEV integration is worthwhile when your system offers no export, when data comes together from several sources, or when the standard export doesn't match the accounts your tax firm works with. Typical cases are shop systems with several payment providers, grown industry-specific solutions and in-house developments that so far only output simple CSV files. We handle the mapping to charts of accounts such as SKR03 or SKR04, tax keys (BU keys), cost centers and document numbers – according to your tax firm's specifications.

02

In terms of accounting, your tax firm remains the benchmark: we align account coding, tax keys and handover rhythm with them before development starts, and technically we take care of everything in between. From our interface and portal projects we know where things get stuck in practice: invoices exported twice, cancellations and credit notes, partial payments, or receipts that only become available days later. We build these cases in from the start and log every handover traceably. Important: we build the technology – this does not replace tax advice.

Story

DATEV integration in 9 slides

Just swipe through: what DATEV integration delivers, what we build for you, and how other companies benefit.

01 / 09

Specialization · API & Backend Development

DATEV Integration. Built around your workflows.

A DATEV integration passes booking data such as outgoing invoices, payments, debtors and creditors from your shop, ERP or custom software to DATEV in a structured way – as a file in DATEV …

  • Free initial consultation
  • Transparent, fixed price if you like
  • Reply usually within 24 hours
nanoconcepts.de
02 / 09

How you can tell

Does this sound familiar?

Typical signs that DATEV integration is worth it:

  1. 01Your accounting team retypes invoices from your shop or ERP for the tax firm.
  2. 02Your system has no DATEV export, or only a CSV file that the tax firm has to rework at great …
  3. 03Your tax firm asks every month about missing receipts or unclear incoming payments.
  4. 04Payments via PayPal, Stripe or marketplaces are hard to match to invoices.
nanoconcepts.de
03 / 09

Your benefit

What you get out of it.

Month-end close without retypingInvoices and payments are captured once and handed over automatically.
Fewer questions from your tax firmComplete data with matching accounts and receipts noticeably reduces the monthly follow-up …
Traceable handoversEvery export is logged: what was handed over when, and which receipts are still missing.
nanoconcepts.de
04 / 09

Scope of services

What we deliver for you.

DATEV integration for your shop, ERP or custom software – booking data and receipts sent to your tax firm …

  1. DATEV export as booking batch
  2. Debtor & creditor master data
  3. Receipt handover
  4. Account coding & mapping rules
  5. Combine shop, ERP & payment data
  6. Validation log & error messages
nanoconcepts.de
05 / 09

Use cases

Here's what that looks like in practice.

Finance & InsuranceAn insurance broker transfers commission statements from different insurers, collected from its brokerage management …
Industry & ManufacturingA machinery manufacturer hands over outgoing invoices including cost centers from its ERP as a monthly DATEV booking …
Retail & E-CommerceAn online retailer combines orders, refunds and payouts from its shop and payment services and hands them over with …
nanoconcepts.de
06 / 09

Process

A clear process. No surprises.

  1. 01
    Alignment with your tax firmTogether with you and your tax firm, we clarify which data is handed over …
  2. 02
    Analyze data sourcesWe examine where invoices, payments and receipts originate today – shop …
  3. 03
    Build export & mappingWe program the handover, account assignment and validation rules, and …
  4. 04
    Test import with real receiptsYour tax firm imports a test period. We reconcile any discrepancies …
nanoconcepts.de
07 / 09

Common question

Good question. Clear answer.

How much does a DATEV integration cost?

Nano Concepts

That depends on how many data sources are connected and how well your existing system provides the data.

All questions & answers
nanoconcepts.de
08 / 09

Packages

Three packages. One plan.

  • Starterfrom €2,500Ideal for landing pages, simple web applications and prototypes.
  • Professionalfrom €8,000For complex web applications, portals and tailor-made software …
  • EnterpriseCustomFor large projects, system landscapes and long-term development …

Non-binding guidance – you will receive your quote after the free initial consultation. View pricing

nanoconcepts.de
09 / 09

Let's get started

Unlock your full potential.

Tell us about your project – we usually get back to you within 24 hours with an initial assessment.

TOGETHER. DIGITAL. SUCCESSFUL.

nanoconcepts.de
01 / 09

Typical signs that DATEV integration is worth it

  • Your accounting team retypes invoices from your shop or ERP for the tax firm.
  • Your system has no DATEV export, or only a CSV file that the tax firm has to rework at great effort.
  • Your tax firm asks every month about missing receipts or unclear incoming payments.
  • Payments via PayPal, Stripe or marketplaces are hard to match to invoices.
  • The month-end close is regularly delayed because the data handover stalls.
Scope of services

What we deliver for you

DATEV integration for your shop, ERP or custom software – booking data and receipts sent to your tax firm automatically.

DATEV export as booking batch

Your software generates booking batches in DATEV format that your tax firm can import into DATEV without rework.

Debtor & creditor master data

Customer and supplier accounts are transferred with unique account numbers so that every booking is assigned cleanly.

Receipt handover

Invoices and receipts are provided to match the bookings – via the routes DATEV provides, for example if your tax firm works with DATEV Unternehmen online.

Account coding & mapping rules

Revenue accounts, tax keys, cost centers and payment methods are assigned according to your tax firm's specifications – including for credit notes and cancellations.

Combine shop, ERP & payment data

We connect data from your online store, merchandise management system and payment services such as PayPal or Stripe into one consistent handover.

Validation log & error messages

Before every handover, the integration checks mandatory fields and duplicates. Anomalies appear in the log instead of only surfacing during the import at your tax firm.

Your benefits

Why companies choose us

Month-end close without retyping

Invoices and payments are captured once and handed over automatically. Your accounting team gains time for review instead of data entry.

Fewer questions from your tax firm

Complete data with matching accounts and receipts noticeably reduces the monthly follow-up questions.

Traceable handovers

Every export is logged: what was handed over when, and which receipts are still missing.

Your system stays

You don't have to switch shop or ERP just because a suitable DATEV export is missing.

Use cases

DATEV integration in your industry

Here's what DATEV integration looks like in typical industries – concrete examples from everyday business.

Industry & Manu­fac­turing

A machinery manufacturer hands over outgoing invoices including cost centers from its ERP as a monthly DATEV booking batch, instead of having the tax firm re-book lists.

Learn more

Retail & E-Commerce

An online retailer combines orders, refunds and payouts from its shop and payment services and hands them over with receipts in DATEV format.

Learn more

Logistics

A freight forwarder exports freight invoices from its transport software together with the debtor master data, ready for the tax firm to import into DATEV.

Learn more

Healthcare & Care

A physiotherapy practice hands self-pay invoices from its practice software to the tax firm in a structured way – without sending diagnoses or treatment details.

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Real Estate

A property management company hands rent receipts and maintenance costs to DATEV with cost centers per property, so evaluations per property are possible.

Learn more

Finance & Insurance

An insurance broker transfers commission statements from different insurers, collected from its brokerage management software, to the bookkeeping in DATEV.

Learn more

Services & Consulting

A consulting firm hands over fee invoices from its project software with project cost centers, so the tax firm can evaluate revenue per client engagement.

Learn more

Skilled Trades

A skilled-trades business exports interim and final invoices from its trades software so that the tax firm can book them without rework.

Learn more

Startups

A SaaS startup hands over subscription invoices and Stripe payouts automatically in DATEV format, so bookkeeping keeps pace with growth.

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Education & Research

An academy hands over course fees, installment payments and credit notes from its registration system to the tax firm, with a unique debtor number per participant.

Learn more

Tourism & Hospitality

A hotel hands over daily closings from its POS and hotel software to DATEV, with separate revenue accounts for accommodation and food and beverage.

Learn more

Media & Creative Industries

A publisher hands over subscription and advertising revenue from its sales system, broken down by revenue type, to the tax firm in DATEV format.

Learn more
Process

How your project works

  1. Alignment with your tax firmTogether with you and your tax firm, we clarify which data is handed over, in which format, with which accounts and at what rhythm.
  2. Analyze data sourcesWe examine where invoices, payments and receipts originate today – shop, ERP, payment services – and which interfaces those systems offer.
  3. Build export & mappingWe program the handover, account assignment and validation rules, and document the logic in a traceable way.
  4. Test import with real receiptsYour tax firm imports a test period. We reconcile any discrepancies together until the bookings are correct.
  5. Go-live & maintenanceAfter sign-off, the handover runs regularly. Changes to accounts, tax rates or format specifications are implemented as part of maintenance.

Technologies & tools

DATEV format (booking batch)DATEV Unternehmen onlineSKR03 / SKR04CSV / XMLRESTWebhooksLaravelPythonPostgreSQL
FAQ

Frequently asked questions about DATEV integration

That depends on how many data sources are connected and how well your existing system provides the data. A clearly scoped DATEV export from a single system can often be implemented in the Starter package from €2,500; connecting several sources such as shop, ERP and payment services falls under the Professional package from €8,000. You will receive the exact quote after the free initial consultation.

A single export is often live within a few weeks – provided the account coding rules have been agreed with the tax firm. The duration is influenced most by coordination and test imports, not by programming. That's why we build a test period into the plan from the start.

There are two basic routes: your software generates a file in DATEV format that your tax firm imports, or the data is transferred via DATEV's online interfaces. The online interfaces come with DATEV's own access and approval requirements, which we check with you and your tax firm in advance. Which route fits better depends on the data volume and on how your tax firm works.

Yes. DATEV is designed to accept booking data from third-party software – typically via the documented DATEV format. We make sure your shop, ERP or in-house development produces this data completely and correctly.

Lexware programs usually offer their own DATEV export, so a new development is typically not necessary. A custom integration makes sense when data from your shop, ERP or in-house developments has to be merged or prepared before the handover. We'll go through this honestly with you in the initial consultation.

No. Your tax firm decides which accounts, tax keys and workflows are correct – we implement those specifications technically. Our work does not replace tax advice; it makes sure the agreed data arrives reliably and completely.

Solutions

DATEV Integration for your target audience

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18 · Scenario · approx. 50 seconds

The invoice mountain

Month end, 400 incoming invoices – and Sabine types up every one. AI reads number, date and amount automatically; Sabine just checks and keeps an eye on discount deadlines.

ServiceAI document processingForAccounting & administration
Read transcript

End of the month.
400 incoming invoices.
Sabine types up every one.
Number. Date. Amount.
One typo: one zero too many.
Early-payment discounts? Missed.
Money left on the table.
Here’s what’s going wrong.
Retyping is not accounting.
NANO CONCEPTS lets AI read along.
Data extracted. Automatically.
Sabine just reviews.
All fields recognized.
Discount deadline in view.
End of the month.
Sabine leaves on time.

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