The E-Invoice Plumberpowered by formatklar
No panic — just a duty.Hourly rate €80 net · 100 % remote

Your invoices. One pipe.

PDF, scan, CSV — that is how invoices arrive today. Since 2025 you must be able to receive e-invoices, from 2027 send them too: structured XML under EN 16931, not just a PDF attachment.

FRAME 1 / 4RECIPIENTCOMPANY · AUTHORITYINBOXPDFCSVScanPDFPDFCSVScanPRESSUREBR-DE-15BR-CO-10BR-DE-1XRechnungZUGFeRDONE OF THE TWOFKFKLet me take a look …Running!
Free check — 15 minutesTry the workbenchFree · no sign-up · checking unlimited
Servers in Germany
Files are not stored
Errors explained in plain language
Technical checks — not tax advice

The hero’s tool belt

Three tools, all in the browser, nothing is stored. Checking is free without limit — creating and correcting hand you the finished document.

Check

Upload an XRechnung or ZUGFeRD file and see within seconds whether the recipient will accept it — with the error code and a one-sentence explanation.

Free without limit

Create

PDF invoice in, the AI reads amounts, tax rates and routing ID, you check the fields — out comes the e-invoice your recipient asks for.

PDF → XRechnung or ZUGFeRD

Correct

Upload a rejected e-invoice, errors are marked and explained in half a sentence, you fix them and download the checked file again.

Error code → plain language

Same prices as the Plumber.

Same board, same team — only the cape is new. All prices net, support by the hour with no minimum. Call-back via the contact form.

Request a call-back
Free check, 15 minutes€0
Quick start e-invoicing€400
Integration into your systemfrom €1,590
Data migration of existing invoices€640/day
Hourly rate — remote, when no fixed price fits€80/h
On-site visit, first hour incl. travel€100
All prices net, plus VAT. On site: first hour €100 incl. travel, 50 km around Achern — then €80/h.
Design variant “The E-Invoice Hero” — same brand, same prices, only the story is new.To the Plumber home page