Multi-NIP under one login
One Biurko, all your companies. Full data isolation, one click between bookkeeping clients.
ACME Sp. z o.o.Quack StudioNiedzwiedz Brewing+2
Open beta Everything for 0 PLN
Invoice. KSeF. Peace of mind.
Build the platform with us.
Biurko is in open beta. We work with Polish companies, accounting offices and freelancers so that mandatory KSeF takes a single click.
Beta ends in11 days · on 01.07.2026
GDPR·EU hosting·TLS 1.3·AES-256
Biurko
OPEN
BETA
2026
BETA
2026
To
You · <Your company>
FA/04/2026/0142
Sent · UPOBuyerACME Sp. z o.o.
NIP5252469789
Gross total12,300.00 PLN
UPOreceived · 14:32
Valid until
01.07.2026
Price
0.00 PLN
Serial BIURKO–0142–KSEF
Comparative breakdown
KSeF-native vs. bolted-on KSeF — the difference you feel.
Four areas where a platform built in 2026 outpaces tools that bolted a KSeF module on top last year.
Aspect
Legacy 2008 + bolted-on KSeF
Biurko · KSeF-native
Issuing FA(3)
Export XML → manual upload
Native FA(3) · ZAL · ROZ · UPR from a single screen
Multiple companies
Separate account per company
Multi-NIP under one login, full data isolation
KSeF outage
Error on screen, manual retry
Offline-queue + auto-retry · UPO catches up later
Roadmap influence
Release notes twice a year
Build-in-public · you suggest, we ship
How it works
Three steps to your first e-invoice.
Median time from sign-up to first UPO in beta: 10 minutes 24 seconds.
STEP
01
01
Connect your company to KSeF
Paste the token; NIP auto-imports full data from GUS. ~2 minutes.
KSeF token
eyJhbGciOi…
NIP · auto-import from GUS
ACME Sp. z o.o.
5252469789 · ul. Marszałkowska 1, Warszawa
STEP
02
02
Issue an FA(3) invoice
Form validates FA(3) live. ZAL, ROZ, UPR from one screen.
Buyer
ACME Sp. z o.o.
Variant
FA(3)Line items
Development · 30h4,500 PLN
Hosting · April 20262,100 PLN
STEP
03
03
Send to KSeF in one click
UPO comes back automatically. If KSeF is down, the invoice stays queued.
FA/04/2026/0142
Sent · UPOUPO refUPO-2026-04-14-A7F2
Duration14:32 · 4s
What you get in beta · 0 PLN
All features. No paid add-ons.
KSeF from day one
Token auth, retry, UPO. Offline queue when MF is down.
Sent · UPO
UPO ref · 2026-04-14-A7F2
Sending QueuedFA(3) + ZAL · ROZ · UPR
FA(3)ZALROZUPR
NIP-based GUS auto-import
Type the NIP — address, REGON, KRS fill themselves.
Role control + audit trail
Secure sign-in, role control, full event trail.
Realtime KSeF statuses
WebSockets. Invoice status updates itself — no F5.
GDPR · EU hosting · offline queue
Lithuania, TLS 1.3, AES-256. KSeF down — invoices queued.
PL · EN · UK interface
For Ukrainian and international teams in Poland.
Who it is for
Solo or team — Biurko scales with you.
JDG · sole proprietorship
For freelancers
First e-invoice in 5 minutes. No need to read KSeF docs.
- Type the client NIP — address auto-fills from GUS
- Three service templates + recurring after launch
- Invoice → KSeF in one click
- PDF + UPO link in the client email
SOLO · 19 PLN / mo after beta · 50% lifetimeJoin the beta
2–5 companies · accounting firm
For small teams
Multi-NIP under one login. Roles, isolation, audit.
- One Biurko = all your companies
- Roles: admin · accountant · user
- Full cross-company audit trail
- Context switch in one click
TEAM · 49 PLN / mo after beta · 50% lifetimeJoin the beta
Pricing
Simple, Transparent Pricing
Plans that activate after the public launch on :date. Join the open beta in the meantime — it is free and includes everything.
Every plan free until the end of beta.
Beta participants keep a 50% lifetime discount after public launch.
MonthlyAnnual Save 20%
Free
Up to 10 invoices per month — enough to try Biurko without commitment
0,00PLN/month
0,00 PLN billed annually
This is for you if
You are trying KSeF — solo, up to 10 invoices a month.
- 1 users
- 1 companies
- Unlimited invoices per month
- KSeF submissions: 10/mo · receive unlimited
Most Popular
Solo
For sole traders and freelancers with unlimited invoicing
19,00PLN/month
228,00 PLN billed annually
+ VAT 23%
This is for you if
You invoice regularly from a sole proprietorship and want full KSeF + automations.
- 1 users
- 1 companies
- Unlimited invoices per month
- Unlimited KSeF submissions
- All features
Team
For small teams up to 5 members and 5 firms under one NIP
49,00PLN/month
588,00 PLN billed annually
+ VAT 23%
This is for you if
You handle 2–5 companies under one account and need roles + audit trail.
- 5 users
- 5 companies
- Unlimited invoices per month
- Unlimited KSeF submissions
- All features
Scale
Unlimited everything, multi-NIP, SSO and dedicated support
149,00PLN/month
1 788,00 PLN billed annually
+ VAT 23%
This is for you if
Accounting firm / scale company — you want unlimited multi-NIP and SSO.
- Unlimited users
- Unlimited companies
- Unlimited invoices per month
- Unlimited KSeF submissions
- All features
Build with us
A roadmap you write together with us.
Beta participants pick the order after launch. Tell us what we ship next.
Planned
- AI inbox + OCR for cost invoices
- PSD2 — bank reconciliation
- JPK_V7 / JPK_FA / SAF-T
- Webhooks API
- Recurring invoices
- SSO for SCALE
In progress
- RR — flat-rate farmer invoices
Done
- KSeF — auth, send, UPO retrieval
- FA(3) + ZAL · ROZ · UPR
- Multi-NIP under one login
- Auto-import from GUS by NIP
- KOR — correction notes
- Purchase invoices · KSeF auto-pull · cost categories
- VAT margin
- MCP server for AI models
Latest from the Blog
Stay up to date with the latest news, tips and insights.
· IT
Mandatory KSeF for Small Businesses: What Actually Changed
The first quarter of mandatory KSeF in Poland: what actually changed for small businesses, where errors show up, and how to prepare for 2027 penalties.
· IT
Will KSeF Deadlines Be Postponed Again? What's Actually Left
KSeF — Poland's mandatory national e-invoicing system — was delayed so many times that "I'll wait, they'll probably push it again" became a default strategy for a lot of companies. For a while it even paid off: the original July 2024 date really did slip. The catch is that the two dates that mattered most have already passed. Since 1 February 2026, large companies invoice through KSeF, and since 1 April 2026, so does essentially everyone else. The system is live, it's mandatory, and no one is rolling it back. Anyone still waiting for "one more postponement" is waiting for something that, for the core obligation, isn't coming. Below: what is genuinely still in play for 2026 and 2027, why betting on another delay is now the most expensive option, and how to set your business up so no date surprises you.
· IT
Fixed Establishment and KSeF: When Foreign Companies Must E-Invoice
From 1 February 2026, Poland's largest taxpayers — and from 1 April 2026, almost everyone else — must issue invoices through KSeF (Poland's national e-invoicing system). If your company is foreign-owned or foreign-headquartered, the first question is simpler than it looks: does this obligation apply to you at all? The answer doesn't turn on whether you hold a Polish NIP (tax ID) or who owns the company. It turns on whether you have a fixed establishment (FE) in Poland that takes part in your sales. On 28 January 2026, Poland's Ministry of Finance (MF) issued official tax guidance clarifying exactly when that obligation arises — and when it doesn't. Here's where the line falls, and what it means for you and your Polish trading partners.
FAQ
Frequently Asked Questions
What works today, what's on the roadmap, and how the open beta works.
KSeF (Krajowy System e-Faktur) is the Polish Ministry of Finance's central system for issuing and receiving e-invoices in the structured FA(3) format. The mandate covers large VAT payers from 1 February 2026 and all remaining VAT-registered businesses from 1 April 2026. Biurko helps you get fully ready for the switch.