E-Invoicing for Small Businesses in Germany: What § 19 UStG 'Kleinunternehmer' and Micro-Firms Must Do
Germany's e-invoicing mandate is often described as a big-company topic — wrongly. The duty to receive structured e-invoices has applied to every business in Germany since January 1, 2025, with no minimum size: a one-person consultancy, a small German subsidiary of a foreign group, or a freelancer with a single German business customer is covered exactly like a corporation. When a supplier sends an XRechnung or ZUGFeRD invoice, a small business must be able to accept and process it under Section 14 of the German VAT Act (UStG).
The genuine relief sits on the issuing side. 'Kleinunternehmer' — small entrepreneurs who use the VAT exemption of Section 19 UStG (from 2025: up to €25,000 prior-year turnover and €100,000 current-year turnover) — are exempt from the obligation to issue e-invoices and may continue billing with paper or PDF. Small businesses above the § 19 threshold get no such carve-out: they follow the general phase-in and must issue structured e-invoices for domestic B2B supplies from 2028 at the latest (from 2027 if turnover exceeds €800,000).
In practice, even exempt small businesses feel the mandate through their customers: German enterprise clients increasingly ask all suppliers for structured invoices, and quoting the § 19 exemption does not make an accounts-payable portal accept your PDF. The low-effort answer is conversion rather than new software — services like Taxlayer convert PDF invoices to compliant ZUGFeRD e-invoices automatically, so a small operation can meet customer requirements without an ERP project. What the format rules mean financially is covered in our guide to German e-invoicing penalties.
Your checklist
- 1Check your § 19 UStG status: confirm whether you qualify as a Kleinunternehmer under the current thresholds — only this status exempts you from the duty to issue e-invoices.
- 2Set up e-invoice reception now: ensure a monitored email address can receive XML and ZUGFeRD files — this has been mandatory for every German business since January 2025, small or not.
- 3Get a viewer for structured invoices: install or bookmark a free XRechnung/ZUGFeRD viewer so incoming XML invoices can be read, checked and booked.
- 4Know your issuance deadline if you are above § 19: plan for mandatory e-invoice issuance from January 1, 2028 (or 2027 above €800,000 prior-year turnover) for domestic B2B supplies.
- 5Ask your key business customers what they expect: many accept PDF from small suppliers during the transition, others already require ZUGFeRD or XRechnung regardless of your legal status.
- 6Use conversion instead of new billing software: convert PDF invoices to ZUGFeRD automatically if customers demand structured formats and your invoicing tool cannot produce them.
- 7Archive received e-invoices correctly: store the XML files unchanged and retrievable for the statutory retention period under German bookkeeping rules (GoBD) — printing them out is not compliant.
- 8Recheck your status yearly: growing past the § 19 thresholds ends both the VAT exemption and the e-invoicing carve-out, so build the format switch into your growth planning.
Frequently asked questions
Are German small businesses exempt from e-invoicing?
Only partially. Kleinunternehmer under Section 19 of the German VAT Act (UStG) are permanently exempt from the obligation to issue structured e-invoices. The obligation to be able to receive e-invoices applies to all businesses in Germany since January 1, 2025, including the smallest — there is no size threshold on the reception side.
Who counts as a Kleinunternehmer under § 19 UStG?
A business whose turnover did not exceed €25,000 in the previous calendar year and does not exceed €100,000 in the current year (thresholds applicable since 2025) and that applies the small-entrepreneur scheme, meaning it charges no VAT on its invoices. The status is a VAT election with its own conditions — exceeding the thresholds ends it and, with it, the e-invoicing exemption for issuance.
What does a small business need to receive e-invoices?
At minimum an email inbox that accepts XML and PDF attachments and a way to display the structured data, for example a free XRechnung or ZUGFeRD viewer. The received XML file must then be archived unchanged for the statutory retention period. No special transmission network or expensive software is legally required for basic compliance.
Our small German subsidiary belongs to a foreign group. Does the small-business exemption help us?
Usually not. The § 19 UStG small-entrepreneur scheme has its own conditions and is rarely available or attractive to group subsidiaries, since it also removes input VAT deduction. A German subsidiary that does not use the § 19 scheme follows the general e-invoicing timeline: reception since 2025 and issuance from 2027 or 2028 depending on turnover.