Online trade 2 Datev interface for online traders

Create time for important things

Yes, accounting in online commerce is important, but your time is precious. That's why AccountOne prepares

all movements from your sales and incoming payments for your tax advisor. Fully automatic.

How AccountOne works

Keep track of your e-commerce accounting without fearing the complexity. With AccountOne, you can easily record your online sales, incoming payments and fees in individual entries. These postings reflect the payments in your bank account and are seamlessly integrated into DATEV. This means you always have a clear and concise overview of your financial transactions.

Register with AccountOne

Registration is quick and easy. Simply click on the "Register" button and log in with us. Registration is completely free of charge and can be done without providing payment information. You then have a 14-day non-binding trial period.



Our onboarding wizard will guide you through the 'first steps' process. In these steps, you can connect your sales channels, your merchandise management system and your payment service providers to AccountOne.

Invite tax consultant

Invite your tax advisor to AccountOne. If your tax advisor already has an account with us, they will be granted access to your account. You can of course change this at any time. If your tax advisor is new to AccountOne, we will guide them through the system personally.



From here, we take over together with your tax advisor. You can now concentrate again on the things you like to do best and take care of your business.

"With our law firm in the Cologne/Bonn region, we have specialized in online retailers and now support clients throughout Germany digitally and with fully automated accounting processes. We also have AccountOne to thank for the fact that this works so well. With their software solution, they are one of our most important partners when it comes to preparing and processing our clients' sales and payments for accounting purposes.

New marketplaces and payment service providers regularly present us with new challenges, which we overcome together with the AccountOne team. Through great customer service, we are helped within a short time and a solution is found for our clients' accounting."

Connect all your systems to AccountOne:

Not found the right tax advisor yet?

AccountOne Features

AccountOne means being able to map all sales and payment channels on one platform. We developed AccountOne for this purpose in close cooperation with tax firms and online retailers. The result is a high-performance software that can be individually tailored to the needs of both sides. In addition to classic online trading transactions, AccountOne also maps almost all special cases in online trading. We like to face new challenges and master them together with our customers.

Online retailer

AccountOne can be used to service the following types of online merchants:

  • Micro-merchants
  • Small traders
  • Medium traders
  • Large dealers (group)
  • Multichannel retailer
  • Omnichannel retailer
  • Amazon FBA and EFN, PAN-EU
  • Dropshipper
  • SaaS provider
  • App provider
  • Shopify POS

Tax cases

AccountOne can be used to handle the following types of tax cases:


  • Target taxation
  • Actual taxation
  • Small business
  • PAN-EU and EFN
  • OSS & IOSS
  • B2B deliveries
  • (Cross-border) series transactions
  • Amazon Consignment Stock
  • UK deliveries
  • Vouchers
  • Mixed baskets (UST. rate)


AccountOne can be fully customized in the following ways:

  • Account assignment revenues
  • Account assignment debtors
  • Account assignment to expense accounts
  • Account assignment payment accounts
  • Commingling account assignment
  • Account assignment shipments
  • Length of accounts (4-12 digits)
  • Individual booking keys
  • Individual OSS booking keys
  • Contents DATEV Export (additional columns)


Each API import can be customized specifically for the online merchant:


  • Adjustment order date, payment date, delivery date
  • Exclusion of certain orders (e.g. Amazon connected to Shopify)
  • Import of POS data (Shopify POS)
  • B2B UST ID Import
  • Multichannel retailer
  • Omnichannel retailer
  • Import of invoice numbers (e.g. WooCommerce)

Additional functions

AccountOne offers a wide range of additional features:

  • Pro forma invoices
  • Qualified verification of UST-ID numbers
  • Measurement article performance Amazon
  • Amazon inventory valuation
  • Delivery threshold monitoring (Until 06/2021)
  • Power threshold monitoring OSS 
  • Exports VAT Compliance


AccountOne can provide the following exports:

  • Accounting
    • DATEV-compliant exports (EXTF) 
    • Batch processable exports
    • Special exports for BMD
    • Special exports for edrewe
    • Special exports for SAP
  • VAT Compliance
    • Special exports for AccountVAT
    • Special exports for AmaVAT
    • Special exports for DutyPay

What our customers say about us


up to 200 transactions


per month

up to 1.000 transactions


per month

up to 3.000 transactions


per month

up to 15,000 transactions


per month


Put together the package of your choice. For anyone with special requirements, large tech stacks or more than 200,000 transactions per month.


Contact sales team >

You can find a detailed list of prices here.

14 days free & full trial

Includes 3 retrospective monthly exports, full access to the software and access to all support resources (helpdesk, e-mail & telephone)