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INVOICING SOFTWARE FOR SOLE TRADERS
Invoicing Software for Sole Traders — How to Choose
Running a sole proprietorship and looking for invoicing software? Before you pick one, work out what you actually need: the KSeF obligation, how many invoices you issue a month, and whether you need an accounting module at all. This guide is an honest comparison of the options — from free tools to paid subscriptions.
No credit card. 3 free invoices a month, no time limit.
What a Sole Trader Actually Needs from Invoicing Software
From April 2026, issuing invoices through KSeF is mandatory for active VAT payers, and from January 2027 it will also cover micro-businesses issuing invoices up to PLN 10,000 a month. Receiving invoices through KSeF is already mandatory now, regardless of company size. Whatever software you pick has to support KSeF from day one — not "on the roadmap".
A typical sole proprietorship issues a handful of invoices a month, sometimes a dozen or so, rarely more. That matters, because most invoicing software prices by invoice volume rather than by feature set. Before you pay for a package built for hundreds of invoices a month, check how many you actually issue in a typical month.
If you work with an external accountant or bookkeeping firm, you don't need a full accounting module in your invoicing software — KSeF-compliant invoicing and data export are enough. Paying for VAT ledgers or generating JPK files only makes sense if you handle your own bookkeeping.
Those are two different sets of needs, and it's worth separating them from the start. A sole trader issuing a handful of invoices a month with an external accountant usually ends up paying for features they will never touch when they pick software built for a mid-sized company with its own finance team. A simpler, cheaper KSeF-compliant invoicing tool is usually all you need — and the budget you save is better spent on something invoicing software normally doesn't do: keeping track of whether clients actually paid.
See what KSeF is and when it becomes mandatoryDecision Checklist: What to Check Before You Choose
Before you commit to a specific program, answer these four questions. It takes two minutes, and it can save you months of paying for features you never use — or worse, for a small invoice limit you will have to upgrade out of anyway.
How many invoices do you issue per month?
A handful is fine on a free plan. A dozen or more — check the limits on paid plans before you hit them.
Do you need an accounting module, or just invoicing?
With an external accountant, plain invoicing is enough. Without one, look for software with VAT ledgers and JPK export.
What is your monthly budget?
PLN 0, a few złoty, or a few dozen — the price difference usually maps to the invoice limit and extra features you get.
Does the software support KSeF already?
Receiving invoices through KSeF is already mandatory. Issuing becomes mandatory from April 2026 (VAT payers) and January 2027 (micro-businesses). Software without full KSeF integration is a problem that catches up with you faster than you think.
An Honest Comparison: What Invoicing for a Sole Trader Really Costs
There is no single best answer to "which invoicing software for sole traders" — there is a set of trade-offs. If you are after the lowest possible price, you will find cheaper options than Terminovo, and that is fine — some sole traders genuinely just need invoicing. If you want invoicing that chases the payment itself when a client is late, that is where the difference starts.
| Software | Price | What you get |
|---|---|---|
| Terminovo Free | PLN 0 | 3 issued invoices a month, unlimited KSeF receiving, no reminders |
| iFirma (Free) | PLN 0 | up to 3 invoices a month, no payment reminders |
| Faktura.pl (free KSeF) | PLN 0 | free KSeF invoicing, no payment reminders |
| Fakturownia | from PLN 12.49/mo* | basic invoicing package, no built-in reminders |
| inFakt (Invoices) | from PLN 4.99/mo* | basic invoicing package, no built-in reminders |
| Terminovo Invoices Only | PLN 29/mo | 75 invoices a month, KSeF, no reminders (available from the Starter plan) |
* price with annual billing, per the provider's own pricing page.
Terminovo is not the cheapest pure invoicing option — the Invoices Only plan (PLN 29/month for 75 invoices) costs more than the basic packages from Fakturownia or inFakt. The difference shows up when a client pays late: from the Starter plan (PLN 49/month), Terminovo automatically emails and texts payment reminders instead of leaving that to you. That's a transparent price ladder — PLN 0, PLN 29, PLN 49 — and if the debt grows and reminders aren't enough, higher plans (from PLN 119/month) add formal payment demands too.
Also considering wFirma? Check our wFirma alternatives comparison
In Short: How to Choose Invoicing Software for a Sole Trader
If you issue a handful of invoices a month and have an accountant, you don't need a full accounting system — simple KSeF-compliant invoicing, free or for a few złoty a month, is enough. If you're starting to run into clients who pay late more often, that's the signal it's worth paying more for software that chases the payment for you instead of doing it manually every time an invoice goes overdue.
Frequently Asked Questions
Does a sole trader need paid invoicing software?
No. Free plans — including the Terminovo Free plan — let you issue a handful of invoices a month at PLN 0, with no credit card required. A paid plan only makes sense once you exceed the free invoice limit or need extra features, such as automated payment reminders.
How many invoices does a typical sole trader issue per month?
Most sole proprietorships issue anywhere from a few to a dozen or so invoices a month. If that describes you, a free plan or a cheap subscription is usually enough — there is no need to pay for a package built for hundreds of invoices you will never issue.
Does a sole trader have to use KSeF?
Yes. Receiving invoices through KSeF is already mandatory for every business. Issuing invoices through KSeF becomes mandatory from April 2026 for active VAT payers, and from January 2027 it will also cover micro-businesses issuing invoices up to PLN 10,000 a month.
What if a client doesn't pay?
Invoicing software alone won't solve that — you need something that reminds the client automatically. From the Starter plan (PLN 49/month), Terminovo sends a series of email and text reminders once an invoice is overdue, so you are not manually writing and calling every time.
Start Issuing Invoices for Free — No Card Required
See how KSeF invoicing works in Terminovo. Start with 3 invoices a month at PLN 0, and when a client pays late, Terminovo sends the reminder for you.
Create your free accountNo credit card. 3 free invoices a month, no time limit.
Questions about paid plans? See pricing