Stripe Integration with Fakturownia.pl: A 2026 Guide

Why do you need a Fakturownia and Stripe integration?

Fakturownia.pl is a popular Polish invoicing system for issuing invoices, receipts and warehouse documents. It enables JPK file generation, managing multiple companies under one account and maintaining sales records in various currencies. The platform has also announced full integration with the National e-Invoice System (KSeF), which will allow automatic sending and receiving of structured e-invoices. Stripe, on the other hand, is a global payment gateway that accepts payments from around the world but does not offer Polish VAT invoices or KSeF integration. Sellers of digital products and online services must therefore ensure that every Stripe transaction is properly invoiced in Fakturownia and submitted to the government system.

From 2026, e-invoicing via KSeF becomes mandatory for Polish entrepreneurs: large companies must use KSeF from 1 February 2026, most small and medium enterprises from 1 April 2026, and micro-entrepreneurs from 1 January 2027. Thanks to KSeF integration, Fakturownia allows you to send an invoice with one click without logging into the ministry portal. If you use Stripe, it is worth connecting it with Fakturownia through a dedicated integration — this will make it easier to issue compliant e-invoices and meet the new tax obligations.

Why can't you rely on a native Stripe to Fakturownia connection?

Stripe focuses on payment processing; it does not generate Polish VAT invoices and does not transmit data such as NIP numbers, VAT rates or buyer addresses. Transaction confirmations sent to customers (so-called receipts) do not meet Polish invoice requirements and are certainly not structured e-invoices required by KSeF. Manually downloading reports from Stripe and entering them into Fakturownia is time-consuming, error-prone and does not scale with a larger number of transactions. Once KSeF takes effect, invoices will need to be sent to the system almost immediately after sale, making manual operations practically impossible.

The solution is a dedicated integration platform (SaaS) — such as Striptu. Our tool receives information about each Stripe payment (via webhook/API) and automatically creates a sales invoice in Fakturownia. Since Fakturownia has a free KSeF integration, the invoice registered in the accounting system can be sent to the government database with one click, and the user does not need to visit the ministry portal.

How does Striptu work?

Striptu is a Polish SaaS that automates invoice issuance based on payments from platforms such as Stripe, Kajabi or ThriveCart. Our tool works in three simple steps: after a Stripe transaction, we receive data via webhook, generate a VAT invoice in the integrated accounting system (e.g. Fakturownia.pl) and pass it on for further processing. This means creators do not need to manually re-enter data or worry about compliance with Polish regulations.

Step 1 — Connect Striptu with Stripe

To connect your Stripe account in Striptu, you need a Secret API Key. In the Stripe dashboard, go to Developers → API keys, generate a Secret Key (starting with `sk_...`) and copy it. Then in the Striptu dashboard, select the Stripe integration, paste the copied key and click Start connection; our platform will automatically create the webhook, so you do not need to configure it manually. Remember that the Secret Key is shown only once — if you lose it, generate a new one.

Step 2 — Connect Striptu with Fakturownia.pl

After enabling the Fakturownia integration, open the service in the Striptu dashboard and go to the Settings tab. In the Fakturownia section, enter:

* Account/company name — just the Fakturownia account subdomain (without the dot and extension).
* API Token — copied from the Fakturownia dashboard.

Then click Test connection. You can find the API Token in Fakturownia.pl: in the menu Settings → Account settings → Integration, click "View API tokens" and use an existing token or generate a new one. After confirming the integration, we will be able to save invoices in your Fakturownia account.

Step 3 — Configure additional options

* Automatic email sending — after issuing an invoice, we can ask Fakturownia to send the PDF to the customer's email address. This feature requires enabling email sending in the Fakturownia dashboard.
Default VAT rate — if you do not use Stripe Tax, Stripe only passes the gross amount without tax information. In this case, we will use the rate from the Default VAT rate* field (e.g. 23%) to calculate net and VAT values on the invoice. This is a fallback solution and works only with a single, fixed domestic rate; for foreign sales or multiple VAT rates, you should enable Stripe Tax and assign the appropriate rates.
* Test payment — make a test transaction in Stripe test mode and check whether the invoice appeared in Fakturownia and whether the integration works correctly.

Subscription and multi-currency support

Striptu treats recurring payments the same as one-time payments — if Stripe charges a subscription instalment, the system automatically generates the next invoice. Our tool passes country, language and currency information to Fakturownia, which allows issuing invoices in the appropriate currency and language and applying the correct VAT rates. This lets you conduct international sales without manual conversion.

Benefits of Stripe → Fakturownia → KSeF automation

* Time savings — our integration collects Stripe transactions and transfers them to Fakturownia automatically. Invoices are issued immediately after a Stripe transaction completes, so you do not need to manually enter data or export files.
* Legal compliance — by using systems prepared for KSeF (like Fakturownia), you can be sure that invoices contain all required fields and can be sent to the government system. Fakturownia enables automatic sending and receiving of invoices to KSeF without logging into the portal.
* Fewer errors — our integration transfers only the necessary data for the VAT invoice; depending on your configuration, you can add a NIP number or order comments. The automated process minimises the risk of missing transactions or incorrectly filling out documents.
* Fast document delivery — Fakturownia can send the invoice PDF via email to the customer and simultaneously submit the e-invoice to KSeF. The customer receives proof of purchase almost immediately, and you fulfil your tax obligation.
* Future-readiness — thanks to KSeF integration, you are prepared for mandatory e-invoicing from 2026. Early implementation allows you to test processes and avoid problems during the transition period.

Pricing and support

Striptu offers a simple subscription model. The Stripe – Fakturownia integration can be configured in a few minutes, and the first 10 transactions are free, allowing you to test the service risk-free. The monthly subscription costs 29 PLN, and the annual plan — 290 PLN — provides approximately 15% savings. The integration does not require a credit card for the initial setup and does not require technical skills. If you have questions, you can count on technical support via chat, email or an online meeting.

Summary

Integrating Stripe with Fakturownia.pl is the best way to automatically issue Polish VAT invoices and send them to KSeF. Since Stripe does not offer invoicing features compliant with Polish law, you need to use an external accounting system. Fakturownia is a proven tool with KSeF support, and Striptu makes it possible to connect it with a global payment gateway in a few simple steps: you obtain the Stripe API key, add the Fakturownia API token and configure your preferences. As a result, every Stripe transaction produces a correct VAT invoice, which Fakturownia can send to the customer and to KSeF. Automation saves time, reduces errors and ensures regulatory compliance — so it is worth implementing today to gain a competitive advantage and peace of mind in accounting.