The Wachstumschancengesetz: What the E-Invoicing Mandate Means for Your Business

Updated: 2026-08-02

The Wachstumschancengesetz (Growth Opportunities Act) is the reason e-invoicing is on every German finance team’s agenda. It amended the VAT Act and thereby made the electronic invoice binding for business-to-business transactions.

What the law actually changes

The core of the amendment is § 14 UStG. It now distinguishes two kinds of invoice:

• the e-invoice — issued, transmitted and received in a structured electronic format that complies with EN 16931 and allows electronic processing;
• the other invoice — everything else, meaning paper and every unstructured electronic format.

The decisive consequence: a PDF is not an e-invoice. It falls into the “other invoice” category, even when sent by email. The reasoning is explained in E-Invoice vs. PDF.

Which transactions are covered?

The obligation applies to supplies between domestic businesses (B2B). Both issuer and recipient must be established in Germany. Not covered are:

• invoices to private individuals (B2C)
• small-value invoices up to €250 (§ 33 UStDV)
• travel tickets (§ 34 UStDV)
• certain tax-exempt transactions under § 4 No. 8–29 UStG

Company size, by contrast, is irrelevant. Small businesses under § 19 UStG and freelancers are covered too — see E-invoicing for small businesses and for freelancers.

The transition rule in § 27 (38) UStG

The law separates receiving from sending — and only sending has transition periods:

The rules are further detailed by the Federal Ministry of Finance letters of 15/10/2024 and 15/10/2025. The full timeline is in E-Invoice Deadlines.

Why the receiving obligation is the urgent part

The transition periods tend to obscure the fact that receiving already applies today — with no relief whatsoever. As soon as a supplier switches to e-invoicing, you must be able to accept the file, read it, and retain the structured record. Plain email suffices for receipt; what matters is that you can then open and validate the file.

Missing this is not only a risk for input VAT deduction — it simply means incoming invoices pile up unprocessed.

What to do now

1. Secure receipt: designate a dedicated invoice email address and communicate it internally.
2. Make incoming files readable: an XRechnung or ZUGFeRD file can be opened and checked against EN 16931 right in the browser — no upload, no account.
3. Settle archiving: what must be retained is the structured original, not a printout. See Archiving e-invoices.
4. Plan for sending: depending on prior-year turnover you have until end of 2026 or end of 2027. The five-step guide walks through the changeover.

Check your first e-invoice

The fastest route to certainty: take an incoming invoice you have already received and validate it against EN 16931 and the German business rules. Validation runs entirely locally in the browser — the invoice never leaves your machine.