You issue the invoice once. Working out the month's tax, filing the declaration with the tax office and bringing back the official proof it was accepted — that part of the deal is already ours.
Overview
14 days with every feature unlocked, no card. After that your account moves to the free plan — not to a paid one.
Pick your legal form and you will see both columns of the deal. We say this up front, before you open an account — not after.
On the ryczałt we run the whole month: the invoice, the contributions worked out, a declaration already sitting at the tax office with its UPO. On the tax scale and the flat tax, invoicing and the whole of VAT already work — the ledger itself does not yet.
Ryczałt — the whole month · tax scale and flat tax — invoices, KSeF and VAT
Create an accountSending an invoice to KSeF is the price of entry today — even the Ministry's free app does it. The difference shows when the gateway stops answering. You turn the automation on once, deliberately; after that we see to it that the document gets through, comes back with its number, and keeps the official proof of receipt beside it.
The contractor comes from GUS by NIP; the VAT white list is checked and saved with the date.
The moment you issue it, if the automation is on.
Straight back onto the document. And if it is rejected, we say so plainly.
The official confirmation of receipt (UPO) stays with the invoice, its signature verified with the Ministry.
We do not cap KSeF sends — not even on the free plan.
Your VAT registers build themselves out of your invoices, with nothing retyped. That is where the tax comes from, and the declaration, and the official proof it was accepted.
August 2026
SettledA contractor in Berlin or Kyiv gets the document in their own language — out of the same invoice you are issuing anyway. Ten templates, ten document languages.
One thing, plainly: edit the set itself and every invoice sitting on it is redrawn — which is why the look you use for exports belongs in a set of its own.
None of this touches the FA(3) XML: the template, the colour and the language change nothing in what goes to KSeF.
Bold · Ukrainian
A huge title, the total on colour
You connect an assistant to your company over the open MCP protocol — it gets more than a hundred tools, the same operations you click yourself. It works on your documents themselves, not on a copy.
Claude · Claude Code · Cursor · ChatGPT
You authorize once through OAuth, with no keys to copy across — and the assistant connects on the paid plans, not the free one.
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The contract, the acceptance protocol and the delivery proof sit with the invoice they belong to — you drag them onto the document.
Only the invoice XML reaches KSeF — the contract and the protocol stay in Biurko.
Today Biurko closes the month for a firm on the ryczałt. Each further step widens that promise — and we give no dates: a step reaches this page only once you can click it.
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Leave your email address and step straight in — no card, no password. Give us your NIP and the demo stands on your own company from the GUS registry, not a made-up one; no Polish company of your own — leave the field empty and we'll open it on an example micro-company. Inside, a work history already in place: invoices, registers, the tax worked out, filings and KSeF statuses.
You're in as soon as you send
We use your name, your email address and — if you give it — your NIP only to open a demo account for you, let you in and write to you about that demo. They aren't added to a newsletter or shared with anyone outside Biurko. We delete the demo account, along with this data, automatically once the demo ends. The exact date is in the email we send you. Full details are in the Privacy Policy.
You can object to the processing of your data and ask us to delete it at any time — write to contact@itcompass.io.
What belongs on an invoice, how KSeF works in practice, and what the ryczałt and the JPK files ask of you.
Poland's national e-invoicing system is entirely Polish-only, meaning that API errors and official receipts require translation. Using software with a multilingual interface helps foreign entrepreneurs avoid costly errors in tax fields and split payment settings. Biurko solves this by storing language preferences individually for each user.
The right e-invoicing tool must align with your operational processes. For inventory, payroll, or full statutory accounting, traditional ERP systems or comprehensive platforms are recommended. Biurko is designed specifically for direct KSeF integration, multi-entity management, and automated workflows.
The mandatory split payment mechanism applies to B2B invoices exceeding PLN 15,000 gross that contain at least one item from Annex 15 of the VAT Act. Failure to comply triggers a 30% VAT penalty, income tax cost disallowance, and personal fiscal-penal liability. Learn how to handle MPP transfers and KSeF requirements.
Straight answers: what works today, and what is not there yet.
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