E-Invoice. Mandatory from 2025 . Integrated into voiceOne.
Since 1 January 2025, all German companies must be able to receive e-invoices — from 2027 also to send them (over €800 k/year) and from 2028 all of them. voiceOne creates XRechnung 3.0 and ZUGFeRD 2.3.2 directly from the phone conversation and hands off to DATEV. No second tool, no per-invoice price.
What you need to know in 2025
E-invoicing obligation in 3 stages. Those who start too late lose orders to competitors who can already deliver — and are forced by the tax office to file a supplementary declaration.
Stage 1 since 01.01.2025
All German B2B companies must be able to receive e-invoices. PDF is no longer enough — XRechnung or ZUGFeRD becomes mandatory.
Stage 2 from 01.01.2027
You must be able to issue e-invoices — Word/PDF is no longer enough.
Stage 3 from 01.01.2028
Sending obligation for all B2B companies — including micro-businesses. Without e-invoicing capability, no more B2B business.
Avoid tax penalties
Incoming invoices without e-invoicing conformity are no longer input-tax deductible from 2028. You pay 19 % on top because your supplier was too late.
What voiceOne can do
A complete e-invoicing pipeline — receiving, creation, dispatch, archive.
XRechnung 3.0 + ZUGFeRD 2.3.2
Standard-compliant creation of both formats. Mandatory fields are checked automatically (Leitweg-ID for public authorities, VAT ID, delivery date). Validation against official KoSIT schemas.
- Hybrid PDF/A-3 with ZUGFeRD
- Pure XML XRechnung
- Validation before dispatch
Create an invoice on the phone
The customer calls, wants an invoice — the AI captures line items, quantity, price during the conversation. After hanging up, the XRechnung draft is ready for approval.
- Speech-to-invoice conversion
- Article master-data suggestion
- VAT logic automatic
Incoming e-invoices automatically
XRechnung and ZUGFeRD attachments are detected automatically, converted into the internal format, validated and submitted for approval. Duplicate detection, OCR fallback for legacy PDFs.
- IMAP connection to your mailbox
- Peppol receipt via provider
- GoBD archiving 10 years
Handover without double entry
XML export in the DATEV receipt-transfer format. Your tax adviser pulls the invoices directly — no double entry, no transmission errors.
- Receipt-transfer XML
- DATEV Unternehmen online
- OPOS accounts automatically
Leitweg-ID & public-sector clients
Invoices to federal, state and municipal bodies via ZRE / OZG-RE. Mandatory Leitweg-ID check, Peppol dispatch, status messages.
- ZRE connection
- Peppol Access Point
- Leitweg-ID database
GoBD-compliant 10-year archive
Immutable storage with hash chain and audit log. Process documentation as a template. Fully auditable during a tax audit.
- Hash chaining per receipt
- Audit log with timestamp
- Read-only tax adviser access
voiceOne vs. sevDesk vs. lexoffice
An honest comparison. We don't do e-invoicing on its own — we do it as part of a telephony workflow.
| Feature | voiceOne | sevDesk | lexoffice |
|---|---|---|---|
| Create XRechnung 3.0 | Yes | Yes (from S package) | Yes (from L package) |
| Create ZUGFeRD 2.3 | Yes (hybrid PDF/A-3) | Yes | Yes |
| Receive + parse e-invoice | Included | OCR, no native parser | Native parser |
| Capture from phone call | Yes (USP) | No | No |
| DATEV export | Document transfer + OPOS | Included | Included |
| Routing ID / Peppol | Included | Add-on | Add-on |
| GoBD archive | Included | Included | Included |
| Telephony Integration | Complete stack | No | No |
| Classic accounting depth | Solid for SMEs | Very mature | Very mature |
How our customers deploy it
Three real e-invoicing workflows from our customer base.
Plumbing company in Köln
A customer calls, asks for the invoice for the last repair. The AI pulls up the job in the CRM, asks for the number of hours and materials, creates a ZUGFeRD invoice, mails it to the customer immediately. Before: the secretary typed in the evening, the customer got the invoice 3 days later.
RVG invoices in Frankfurt
A client calls about a fee note. The AI checks RVG fee items in the file, creates an RVG-compliant XRechnung with Leitweg-ID (for public-authority clients). DATEV export nightly.
Time tracking Berlin
Consultants log their hours by calling the voiceOne mailbox („Today 4 hrs project Müller AG, coaching"). Month-end: the AI generates an XRechnung per client, checks hourly rates and sends automatically once approved.
Included in the voiceOne plan
Get in touch with us for a bespoke quote. We configure volume, users and add-ons to suit your sector.
Request an e-invoicing consultation
30 minutes with our accounting consultant. We review your current pipeline and show the migration path.
Frequently asked questions
Become 2025-ready in 14 days.
No credit card needed, no setup fee. Full functionality including an AI phone assistant.