I
ITPER
KSeF & E-INVOICING

Invoices that issue themselves and reach KSeF

Since 1 April 2026, e-invoicing in KSeF — Poland's national e-invoice system — also applies to micro, small and medium companies. I connect your store, website and sales system to KSeF so the document is created and sent without your involvement.

See the scope
Already in forcesince 1 April 2026 for micro, small and medium companies
Rollout without pausing sales

What you get after the rollout

  • An invoice issued automatically once an order is paid
  • Submission to KSeF and a document number without manual work
  • An issuer certificate configured and documented, so you know what to renew
  • A PDF e-mailed to the customer exactly as before
  • Credit notes and returns handled in the same flow
  • A status view: what went through, what is waiting, what needs attention

I am not an accounting firm and I do not give tax advice — I am responsible for the technical side of issuing and sending documents. Tax decisions stay with your accountant.

KSeF compliance
Invoices and credit notes
Issuer certificate
Statuses and alerts
Care after rollout

Why automate invoicing?

The obligation applies to you either way. The question is whether it turns into another evening chore or into a process you never have to think about.

No more issuing by hand

At a few dozen orders a month, issuing invoices alone takes hours. Automation does it at the moment of payment, at any time of day.

Peace of mind with the obligation

The document goes to KSeF in the required format and comes back with a number. Nothing to remember, watch over or catch up on at month end.

Your accountant gets the full set

Documents are complete and in one place. Instead of sending scans, you give your accountant access to an orderly flow.

What the rollout covers

I match the scope to how you sell today and where you keep your books.

Issuing and submission

The invoice is built from order data and goes to KSeF automatically. The customer gets a PDF by e-mail, you see the document number in your panel.

Online salesVAT invoicesKSeF number

Certificate and permissions

I configure the issuer certificate and KSeF permissions, document the renewal dates and show you where to check them.

Issuer certificatePermissionsDeadlines

Buyer data from the register

In business sales the buyer's details are pulled by tax ID and the VAT status is checked against the official list. Fewer mistakes on the document.

Tax IDRegisterVAT list

Credit notes and returns

A returned item or a mistake in an order ends with a credit note issued inside the same flow, not by hand next to the system.

Credit notesReturnsComplaints

Statuses and alerts

You see which documents went through and which got stuck. If a submission fails, you learn about it immediately, not a week later.

Status viewAlertsRetries

Link to your accounting

Documents land where you keep your books — in your accounting software, at your accounting firm, or both at once.

Accounting softwareExportsAccounting firm

Manual invoicing vs automation

The same month of sales, two completely different evenings.

TODAY

By hand, after hours

×Issuing invoices in the evening, after sales close
×Retyping counterparty details from e-mails
×Typos in tax IDs and addresses caught only by the accountant
×Scanned documents circulating by e-mail in several versions
×Rushed catching-up before the deadline
×The risk that a document never reaches KSeF at all
AFTER ROLLOUT

Automatically, in the background

The invoice is created the moment the order is paid
Buyer details pulled from the register by tax ID
The document submitted to KSeF and confirmed with a number
The customer gets a PDF by e-mail without your involvement
Credit notes and returns handled in the same flow
Statuses visible live, errors reported at once

How the KSeF rollout runs

Four stages, during which your sales keep running normally.

01

Document flow audit

I check how an invoice is created today, where you keep your books and what your accountant says about it. A few questions, not a week of work.

02

Certificate and access

We settle the KSeF permissions and configure the issuer certificate so the system can issue documents on behalf of your company.

03

Delivery and testing

I connect the store or sales system, push test documents through and check the error paths: wrong tax ID, missing data, rejected submission.

04

Go live and care

We switch to production and I walk you through the panel and the statuses. Then I watch KSeF-side changes and your certificate renewal dates.

See also

Services that most often go hand in hand with this one.

Integrations & automation

Invoicing, register data, couriers and warehouse connected into one flow that runs without you.

Multichannel sales

Marketplaces, your store and other platforms in one panel, with shared stock and shipping.

Online Stores

Full-scale e-commerce with intuitive management, payments and sales automation.

KSeF — frequently asked questions

The largest companies entered the system on 1 February 2026, and micro, small and medium ones on 1 April 2026. Until the end of 2026 a transitional relief applies to the smallest sales, up to PLN 10,000 a month. The deadlines have been moved before, so ahead of any rollout I confirm the current rules and your scope together with your accountant.
No. Automatic issuing makes sense anywhere the same type of document repeats — including services, subscriptions and orders coming from a form on your website.
They can be brought into the same flow or left with your accounting software. We settle this at the start so documents do not end up duplicated in two places.
No, and that is not the goal. Automation issues and sends documents; your accountant still handles the settlements. Usually it is accountants who want this rollout most, because they finally get a complete set of data on time.
Connecting a typical store usually takes 5–10 working days including tests. Unusual cases take longer: sales across several channels, a custom system or non-standard documents.
Such a document does not disappear quietly. The system retries, flags it in the panel and notifies you so it can be handled straight away. We test the error paths before go-live, because they decide how calm life is afterwards.

Let us check whether your invoices are ready for KSeF

A short conversation is enough to establish what is missing and how much work lies ahead. If everything is already in place, I will tell you so plainly.

Phone
+48 886 126 158
E-mail
itper.pl@gmail.com

Ask about a KSeF rollout

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