Invoicing process audit
A map of sales and supplier invoices and the choice of solution.
from 700 PLN
NEXALYQ · KSeF · E-invoicing · n8n
We connect your store, CRM and invoicing system to KSeF, Poland's National e-Invoicing System. Sales invoices go to KSeF automatically, and supplier invoices flow straight into your accounting and archive.
What it covers
An invoice is created from a store order or a CRM deal and sent to KSeF through your invoicing system, with no manual data entry.
We download supplier invoices from KSeF and pass them to your accountant, a spreadsheet or your CRM. Since 1 February 2026, all companies receive invoices through KSeF.
The KSeF number and sending status are saved to the order, and the person responsible hears about any error right away.
Customers get a clear PDF invoice, and copies go to an archive in Google Drive or another agreed place.
We help organise access to KSeF: credentials for the integration and permissions for your accounting office.
n8n sends alerts about rejected invoices and new supplier invoices by e-mail or Telegram.
Scenario
Who it applies to
Since 1 February 2026, all companies in Poland receive invoices through KSeF, and since 1 April 2026 most also issue them there. Companies whose invoices do not exceed PLN 10,000 gross per month have until the end of 2026.
An integration helps most online stores, service companies with a CRM and anyone who issues or receives dozens of invoices a month.
Integrations
The simplest way is to issue invoices in a system that already connects to KSeF. Where that is missing — your own CRM, an unusual store, passing on supplier invoices — we add automation in n8n or use the KSeF API.
Implementation
We check where invoices are created, who issues them and how they reach your accountant.
We pick an invoicing system or an API integration and agree how the integration accesses KSeF.
We test sending, rejections, corrections and downloading invoices in the KSeF test environment.
We switch on the integration, show your team how it works and agree on ongoing support.
Indicative budget
A map of sales and supplier invoices and the choice of solution.
from 700 PLNAutomatic sales invoices with the KSeF number saved to the order.
from 2,500 PLNDownloading invoices, archiving and passing them to your accountant.
from 2,000 PLNThe first consultation is free. Prices are indicative; the final proposal will define the scope and taxes. Invoicing system subscriptions and accounting services are paid by the client at their own rates. We handle the technical side of the integration, not tax advice.
FAQ
All companies have received invoices through KSeF since 1 February 2026. Issuing: the largest companies since 1 February 2026, all others since 1 April 2026. Companies with invoices up to PLN 10,000 gross per month have until the end of 2026.
Not always. Many popular systems already connect to KSeF. We review your current tools and suggest a change only if an integration is not possible.
Yes. An invoice can be created automatically once an order is paid, and the KSeF number is saved to the order.
The integration logs the error and sends an alert so the data can be fixed quickly and the invoice sent again.
Yes. We set up permissions in KSeF or automatic forwarding of invoices to your accounting office.
No. We handle the technical side of the integration. Tax questions are best agreed with your accountant or tax adviser.