Best Invoicing Software 2026 – Ranking and Pricing

What to look for when choosing invoicing software in 2026?

Key criteria: KSeF compliance (mandatory from February 2026), debt recovery features, pricing model, ease of use, integrations, and support. How much does invoicing software cost, and which option is the cheapest? We answer both questions in this ranking.

The 7 best options compared

1. Terminovo - KSeF invoicing from PLN 0 (3 invoices/month) or PLN 29/month for 75 invoices - the only tool in this ranking that combines invoicing with automated payment recovery (reminders from PLN 49/month). Best for small and medium B2B companies that want invoices to actually get paid.

2. Fakturownia - Powerful API, e-commerce integrations. PLN 29–79/month + PLN 30 for debt recovery module. Read full review.

3. InFakt - Simple interface, accountant collaboration. PLN 39–79/month. No debt recovery module. Read full review.

4. wFirma - Full accounting + HR + payroll. Modular pricing from approx. PLN 19/month net, typically PLN 68–148/month. Basic reminders only - no automated sequences. Read full review.

5. iFirma - Cheapest subscription at PLN 19/month, but capped at 10 invoices/month. No debt recovery features. Read full review.

6. Faktura.pl - Human-led telephone debt recovery from PLN 199/month + commission.

7. Symfonia - Full ERP from PLN 300/month. Overkill for small businesses.

How much does invoicing software cost in 2026?

Prices for Polish invoicing software span a wide range - from PLN 0 for basic KSeF invoicing, through PLN 19–79/month for simple sole-trader tools, up to PLN 300–600/month for full ERP systems with warehouse and HR modules. Invoicing itself is one cost, but if you also want automated reminders for overdue payments, most tools add PLN 30–200/month for a separate debt recovery module.

The cheapest invoicing software with full KSeF support is currently Terminovo - the Free plan (PLN 0, 3 invoices/month) or the Invoices Only plan (PLN 29/month, 75 invoices), with no add-on fees for features you don't need. If you also want automated debt recovery, reminders start at PLN 49/month - still less than what many competitors charge just for their debt recovery add-on.

A cheap invoicing tool is defined by its price tag. A good one is defined by how many of your invoices actually get paid on time. One in three B2B invoices in Poland is paid late (Intrum, European Payment Report 2025) - a cost no price comparison table shows.

Summary

For most small and medium B2B companies, Terminovo is the best choice: KSeF invoicing from PLN 0, automated debt recovery from PLN 49/month. See pricing.

Frequently asked questions

How much does invoicing software cost?

Prices start at PLN 0 for basic invoicing (e.g. Terminovo's Free plan - 3 invoices/month) and go up to PLN 300–600/month for full ERP systems. Simple sole-trader tools typically cost PLN 19–79/month, and if you also want automated payment reminders, most programs add PLN 30–200/month for a separate debt recovery module - unless you pick a tool where reminders are already included, like Terminovo (from PLN 49/month).

What is the cheapest invoicing software with KSeF?

Several tools let you start free — Terminovo (3 issued invoices/mo, unlimited KSeF receiving), iFirma and Faktura.pl all have free KSeF tiers. Pure-invoicing subscriptions can be cheaper than Terminovo (Fakturownia from PLN 12.49/mo, inFakt Faktury PLN 4.99/mo on annual billing), but none of them leads to automated payment reminders. You pick the Invoices Only plan (PLN 29/month, 75 invoices) when you want invoicing with a built-in path to soft debt collection — the only combination of its kind in this ranking.

Is free invoicing software enough for a sole trader?

It depends on how many invoices you issue. If you issue up to 3 invoices a month, a free plan (e.g. Terminovo Free) is enough - it supports KSeF and lets you receive invoices without limit. If you issue more, or need automated payment reminders, you'll want a paid plan such as Invoices Only (PLN 29/month) or a plan with reminders from PLN 49/month.