E-invoicing becomes mandatory.
We are already ready.
From 1 January 2027, Slovak businesses exchange invoices electronically — via the Peppol network, with tax authority reporting. Billtree already issues invoices in Peppol BIS 3.0 (EN 16931) today.
10 invoices per month free — forever. No credit card.
This is how every invoice travels from 2027 — Billtree speaks this format today.
What changes from 2027?
XML instead of PDF
The invoice becomes a structured electronic document (Peppol BIS 3.0) delivered straight into the recipient's system — not an email attachment.
Digital postman
Invoices are delivered via a certified provider that validates them and reports to the tax authority automatically.
Reporting within 15 days
Both issued and received invoices must be reported. Fines: up to €10,000, repeated violations up to €100,000.
Issuing is mandatory for VAT payers from 2027; receiving must work for ALL businesses — including non-VAT payers.
The system can be tested without penalties. The ideal time to switch — calmly, not in panic.
Domestic B2B and B2G transactions electronically only.
E-invoicing mandatory across the EU (ViDA).
PRODUCT TOUR
And invoicing stays simple
An invoice in 2 minutes
Customer, items, done. Numbering, mandatory fields and the PDF are automatic — with the structured e-invoice generated in the background.
Paid in seconds
Every invoice has a public page: PDF, bank details and a QR code — customers pay from their banking app. Reminders run automatically.
ARTIFICIAL INTELLIGENCE
An assistant that actually works
It knows your entire database, issues invoices, sends emails — you just ask. Receipts? Snap a photo, AI books it.
Your office in your pocket
Installable web app (PWA) + Android app: invoice at your customer's site, snap receipts on the go.
PRICING
Simple, honest pricing
No card at signup · Cancel anytime · Your data on EU servers (Frankfurt)
E-invoicing FAQ
Who does the mandate apply to?+
VAT payers must issue electronically from 1 Jan 2027 for domestic B2B/B2G. ALL businesses must be able to receive e-invoices — including non-VAT payers.
What will I need?+
Invoicing software that generates Peppol BIS 3.0 XML (Billtree does today) and a certified digital postman for delivery — we're building the integration for the voluntary phase.
Does Billtree work in Hungarian?+
Yes — the app runs in Hungarian, English and German (Slovak is coming). Ideal for businesses in southern Slovakia.
Why switch now?+
The voluntary phase runs from Q2 2026 — switch now and test calmly. December 2026 will be a rush at every provider.
Don't wait for the December 2026 panic.
Switch to Billtree now — free, no strings attached.
Start for free