Expert Integration Services for German E-Invoicing Projects
Get guided services to connect your systems with German e-invoicing, from assessment and design to testing and go-live. Create and receive structured EN 16931 invoices, align tax data with UStG rules and keep original files ready for GoBD record-keeping.
Trust Badge Row:
- Discovery and Readiness Assessment Workshops
- System Connection and Data Mapping Setup
- Structured Invoice Testing Before Go-Live
- User Training and Launch Support Sessions
- Ongoing Monitoring and Rule Update Support
What German E-Invoice Integration Services Typically Include
Integration services help you move from your current invoicing setup to structured e-invoicing without building everything yourself. A typical project covers assessment, solution design, system connection, testing, training and launch. The goal is invoices that follow EN 16931, as Section 14 UStG requires for e-invoices, and records that meet GoBD expectations.
Every business in Germany has had to be able to receive e-invoices since 1 January 2025. Issuing duties start on 1 January 2027 above prior-year turnover and on 1 January 2028 for others. Projects need time for planning and testing, so confirm your own dates with the BMF or your tax advisor.
Integration Services Offered for German E-Invoicing
Readiness Workshop
Review your invoice types, customer groups and systems to define which formats and deadlines apply to you.
Solution Design
Plan the data flow, formats, delivery channels and approvals before any technical work begins.
System Connection
Connect your ERP, billing or accounting tools and map their fields to EN 16931 business terms.
Test and Go-Live
Run sample invoices through validation and agree launch steps before real customers receive files.
Team Training
Show finance, IT and billing users how to create, review, receive and correct structured invoices.
Post-Launch Support
Monitor early invoices, resolve rejected files and adjust settings after the first live billing runs.
Project Inputs to Prepare Before Services Begin
- List every system that creates or stores invoices.
- Name a project owner in finance and in IT.
- Collect samples of each invoice type you issue.
- Note all VAT cases, including exemptions and reverse charge.
- Identify customers that need XRechnung or ZUGFeRD.
- Decide how supplier e-invoices will be received today.
- Agree target dates linked to your issuing deadline.
Choose a Service Model That Fits Your Team
Some companies want a full project led by the service team, while others prefer to guide their own developers with expert support. Define which tasks belong to your team and which to the service team, such as mapping, testing, approvals and training, so responsibilities are clear from the first workshop.
2nd Paragraph (≈255): Advintek supports e-invoicing workflows for Germany. Before the project starts, confirm the service scope, supported formats, delivery channels, system connectors and timelines, and review current guidance from the Federal Ministry of Finance (BMF).
Project Delivery Controls
Scope Definition
Write down which entities, invoice types and systems are included so nothing is missed or assumed.
Sign-Off Gates
Require approval from responsible teams before configuration changes reach the live invoicing process.
Milestone Reviews
Hold checkpoints after design, testing and launch so finance, IT and tax teams can confirm progress.
Handover Documents
Receive mapping tables, test results and process notes that support GoBD procedural documentation.
Guidance for Project Owners and Technical Teams
Advintek helps teams plan the project, test invoice flows and keep German e-invoicing records organised from day one.
For Project Owners and Finance Leaders
- Set clear scope, milestones and responsibilities.
- Align the project plan with your issuing date.
- Keep tax decisions with the right internal owners.
For IT, ERP and Tax Teams
- Review field mapping and VAT treatment in workshops.
- Test with real invoice samples before go-live.
- Keep original structured files in GoBD-aligned storage.
Discuss Your German E-Invoice Integration Scope
Share your systems, entities, invoice types and timeline. Then agree a phased plan covering assessment, design, connection, testing, training and support, so your integration is ready before the issuing date that applies to your business.
Frequently Asked Questions
1. What are German e-invoice integration services?
They are project services that connect your existing systems with e-invoicing so structured invoices following EN 16931 can be created, sent, received and stored. They usually cover assessment, design, setup, testing, training and support, so your team does not have to handle every technical step alone.
2. What steps does an integration project usually follow?
Common steps are a readiness review, solution design, system connection and field mapping, testing with sample invoices, user training, go-live and early support. The exact order and length depend on your systems, invoice types and customers. Ask for a written plan with milestones before you start.
3. Who needs to be involved from our side?
You usually need a project owner, finance users who know the invoice process, IT or ERP staff, and your tax advisor for VAT questions. Include people who handle supplier invoices as well, because receiving e-invoices has applied to every business since 1 January 2025.
4. Can the services be delivered in phases?
Yes. Many companies start with receiving and storing supplier e-invoices, then add invoice creation and validation. The issuing duty starts on 1 January 2027 above €800,000 prior-year turnover and on 1 January 2028 for others. Plan the phases with your tax advisor or the BMF guidance.
5. How are existing invoices handled when we switch?
Invoices issued before the switch must still be kept for the legal retention period, which is eight years under the Fiscal Code and Section 14b UStG. Agree before the project starts where old files stay and how they can be retrieved. Check your plan with your tax advisor.
6. What testing should the services include?
Testing should cover standard and reduced VAT, exemptions, credit notes, public sector customers and inbound supplier files. Review validation results and readable views, and ask key customers to confirm they can process your files. Fix mapping gaps before the first live invoice is sent.
7. What support follows go-live?
Ask about monitoring of early invoices, handling of rejected files, user questions and settings changes. The first billing runs often show cases that tests missed. Agree contact routes and response expectations in writing, so your team knows who to reach when an invoice fails.
8. How are rule and format updates handled?
German e-invoicing guidance and format versions change over time, such as updates from the BMF and KoSIT. Ask how changes are tested and released, who informs you, and how you keep a record of which rule version applied to each invoice. Confirm this before signing any agreement.
9. Who stays responsible for invoice compliance after the project?
The invoice issuer remains responsible for the content and tax treatment of each invoice under the UStG. Services can set up validation, mapping and storage, but your team still makes the tax decisions. Review responsibilities in your agreement and confirm special cases with your tax advisor.
10. Can Advintek provide e-invoice integration services in Germany?
Advintek offers e-invoicing solutions for the German market. Before implementation, verify the service scope, supported formats, system connectors and timelines. Confirm your legal obligations with the Federal Ministry of Finance (BMF) or your tax advisor, as the rules are being introduced in stages.
