Automation · E-Invoice

Generate e-invoices automatically and send them format-compliant.

E-invoice automation means generating XRechnung and ZUGFeRD directly from your inventory-management, ERP, or invoicing system, validating them against EN 16931 standard before sending, and automatically routing them to customer, portal, or Peppol network. NordFlux builds this outbound path for you and optionally integrates inbound receipt as well. You see each invoice and approve onward yourself.

The problem

From 2027, PDFs via email no longer count as invoices everywhere.

Everyone must receive e-invoices from 2025 already—that's known. In outbound, most businesses keep sending PDFs, and the switch to structured formats gets pushed to later.

  • 01XRechnung sounds like XML and tech, and nobody on the team knows how a finished invoice from your system becomes a format-compliant file.
  • 02For each e-invoice a new portal, a new tool, a new subscription, and in the end the digital path costs more than the paper used to.
  • 03Customers already demand XRechnung or ZUGFeRD in a specific profile today, and every rejection due to format error delays your cash.
  • 04Deadlines 2027 and 2028 loom, but nobody has yet explained clearly whether and when you yourself must issue.
Use cases
01

Generate, validate, and send e-invoices: the complete outbound path.

We don't automate a single export but the journey of the invoice from your system to the customer's inbox. We combine these five building blocks to fit your workflow.

01

Generate XRechnung and ZUGFeRD from your system

The structured file emerges automatically from inventory, ERP, or invoicing software: XRechnung as pure XML or ZUGFeRD as PDF with embedded XML, in the profile per EN 16931. Your office staff creates the invoice as usual; the format arises in the background.

Savings 2–5 h per week
02

Format validation before sending

Every invoice is automatically validated against EN 16931 before sending, including mandatory fields and arithmetic consistency. So no invoice goes out that the customer rejects for a format error, and you learn of mistakes before the customer does.

Effect no format error
03

Auto-fill mandatory data

Routing path ID for public clients, buyer reference, correct tax rates, and payment details are drawn from your master data and set correctly per customer. This saves you manually entering fields that otherwise stay blank in the XML and invalidate the invoice.

Effect complete invoice
04

Send through the right channel

The finished e-invoice automatically goes where the customer needs it: via email, into a supplier portal, or over the Peppol network. The channel hangs on the customer master record; nobody needs to remember who expects which format over which path.

Savings no manual upload
05

Legally sound archiving

The structured original of every e-invoice is stored in a GoBD-compliant, immutable way, not just a PDF printout. In an audit, you retrieve the machine-readable file exactly as sent, including proof of sending.

Effect audit-ready filed
Solution paths

How NordFlux generates and legally sends e-invoices.

There's no single right tool. We choose based on what already runs at your end and which systems need to be integrated.

Flexible & self-hosted
n8n as invoice hub

n8n connects your invoicing system, format generation, validation, and sending into one path and can run on a German server if you wish. Good if data sovereignty matters to you or many systems and customer channels come together.

Deadlines & formats
What the law actually requires

Since 2025, all domestic businesses must receive e-invoices; issuing mandates kick in staggered in 2027 and 2028 (Source: German Federal Ministry of Finance). We clarify what applies to your business concretely before building anything.

Inbound and outbound
One invoice process instead of two island solutions

Outbound and inbound invoices run through the same automation base with us, so no second tool and no duplicate effort emerge. If more than just invoice sending is broken at your end, look at total process automation.

How we work

The 30-day model.

From first conversation to running e-invoice path in 30 days, fixed price instead of open timesheets.

1

Free initial analysis

60 minutes, no obligation: we look at which system your invoices come from, which formats your customers need, and what the law means for you.

2

Concept and fixed price

You get a concrete proposal: which path we build, which formats and channels we connect, and what it costs. A number, no surprises.

3

Build with real invoices

We build the automation and test it with your actual outbound invoices, validate the generated XRechnung against EN 16931, and trial-send to a test channel. You see every milestone.

4

Handoff and operations

Your team learns the path, gets documentation, and knows where to intervene. If a format or customer channel changes, we adjust as needed.

The other direction

E-invoices also land at your end.

If not outbound but the flood of inbound invoices is your bottleneck, look at the inbound path: capture, validation, approval, and handoff to accounting. Both directions run through the same base with us.

View invoice inbound automation
Free initial analysis

Will you send format-compliant e-invoices from 2027?

In the free initial analysis, we clarify when the issuing mandate applies to you and how your invoice outbound becomes format-compliant. 60 minutes, no obligation, no sales pressure.

  • Fixed price instead of open timesheets
  • Your invoice data stays in Germany
  • You stay in control of each invoice
Common questions
05

What decision-makers often ask about e-invoices.

Ab wann muss mein Unternehmen E-Rechnungen ausstellen?

Seit dem 1. Januar 2025 müssen alle inländischen Unternehmen im B2B-Bereich E-Rechnungen empfangen können. Für das Ausstellen gelten Übergangsfristen: Unternehmen mit mehr als 800.000 Euro Vorjahresumsatz müssen ab dem 1. Januar 2027 E-Rechnungen ausstellen, alle übrigen ab dem 1. Januar 2028 (Quelle: Bundesfinanzministerium). Das ist keine Rechtsberatung, im Zweifel klärt Ihr Steuerberater die genauen Fristen für Ihren Fall.

Was ist der Unterschied zwischen XRechnung und ZUGFeRD?

XRechnung ist ein reines XML-Format, ZUGFeRD ab Version 2.0.1 ist ein Hybrid aus einem PDF mit eingebetteter XML-Datei. Beide erfüllen die europäische Norm EN 16931 und gelten damit als E-Rechnung im Sinne der Pflicht (Quelle: Bundesfinanzministerium). Welches Format sinnvoll ist, hängt vom Kunden ab: öffentliche Auftraggeber verlangen meist XRechnung, viele Geschäftskunden nehmen ZUGFeRD, weil sie die Rechnung zusätzlich als PDF sehen.

Können wir E-Rechnungen aus unserem bestehenden System erzeugen?

In den meisten Fällen ja, ohne dass Sie Ihr Rechnungsprogramm wechseln müssen. Wir setzen die Formaterzeugung entweder auf eine vorhandene Schnittstelle Ihres Systems oder auf die exportierten Rechnungsdaten auf und wandeln sie in XRechnung oder ZUGFeRD um. Ob eine direkte Anbindung möglich ist oder ein Zwischenschritt nötig wird, klären wir in der Erstanalyse an Ihrem konkreten System.

Was kostet die Umstellung auf E-Rechnung?

Sie bekommen nach der kostenlosen Erstanalyse einen Festpreis, der von Ihrem Ausgangssystem, den geforderten Formaten und den Versandkanälen abhängt. Ein reiner ZUGFeRD-Export per E-Mail ist etwas anderes als eine Strecke mit mehreren Formaten, Peppol und Portalversand. Der Festpreis steht, bevor Sie sich entscheiden, und ändert sich während des Projekts nicht.

Müssen wir E-Rechnungen auch empfangen und verarbeiten können?

Ja, die Pflicht zum Empfang von E-Rechnungen gilt für alle inländischen Unternehmen bereits seit dem 1. Januar 2025 (Quelle: Bundesfinanzministerium). Empfangen allein reicht in der Praxis aber nicht, die Rechnungen wollen auch ausgelesen, geprüft, freigegeben und gebucht werden. Diese Eingangsseite bauen wir auf derselben Basis, damit Ausgang und Eingang zusammenpassen.

Automate e-invoices | NordFlux