Best Invoicing Software 2026 — Ranking

Why Good Invoicing Software Is Essential in 2026

From April 1, 2026, KSeF (National System of E-Invoices) became mandatory for all VAT taxpayers. This means every issued invoice must be automatically sent to the government system. Without proper software, this task takes many hours and error risk grows exponentially.

Good invoicing software means not only faster invoicing, but primarily:

• Automatic KSeF integration (without manual sending)
• Time savings — instead of 30 minutes per invoice, just 2 minutes
• Error reduction in taxes and accounting
• Automatic VAT and tax calculation
• Archiving and tax office reporting
• Integration with accounting systems

In this article, we analyzed 15+ popular invoicing software. Here are TOP 10 worth your attention in 2026.

1. Fakturownia — Best for KSeF Automation

Price: 18.99 PLN/month (start), 49.99 PLN/month (pro), 99.99 PLN/month (business)

KSeF: Full automation — invoices send to KSeF without clicking

Free plan: Yes, 3 invoices/month unlimited time

Fakturownia is Poland's oldest and most popular invoicing platform. Main advantage: complete KSeF automation — each issued invoice reaches the government system without additional actions.

Interface is intuitive. Fill in customer data, select goods/services, and Fakturownia calculates VAT, sends to KSeF and generates PDF. Everything in seconds.

For whom: Micro-entrepreneurs, freelancers, small businesses needing no advanced accounting.

Pros: Intuitive interface, fast KSeF sending, free plan, Polish support, PayPal/Stripe integration.

Cons: No warehouse integration, limited reporting for advanced users.

2. inFakt — Best Free Software

Price: 0 PLN (free forever)

KSeF: Supported, but requires manual sending (not automatic)

Free plan: Yes, no time limits or invoice limits

inFakt is a brilliant offer for startups and JDG wanting to avoid software costs. Program is fully free with no hidden fees, supports all invoice types: VAT, margin, prepayments, final invoices.

Biggest advantage: no limits — issue 1 or 1000 invoices, you always pay 0 PLN. KSeF supported but not automatic — manual document submission required.

For whom: Starting JDG, micro-businesses, freelancers with few transactions.

Pros: Completely free, intuitive, high Google Play rating (4.7/5), KSeF support.

Cons: No automatic KSeF sending, limited reports, no warehouse integration.

3. wFirma — For Full Business Automation

Price: 19 PLN/month (invoices), 49 PLN/month (comprehensive), 79 PLN/month (max)

KSeF: Full automation (sending + receiving)

Free plan: No, but 30 days free trial

wFirma is solution for businesses wanting more than just invoicing. Program handles: invoices, KPiR (Cash Book), JPK-VAT, full KSeF automation, and customer management.

KSeF integration is completely automatic — documents send without your intervention. Additionally wFirma retrieves invoices from KSeF, easing VAT settlement.

For whom: Small businesses wanting KSeF support + simple accounting, JDG and LLC.

Pros: Full KSeF automation (sending + receiving), KPiR in software, JPK-VAT, intuitive, technical support.

Cons: No free version, more expensive than Fakturownia on higher plans, limited third-party integrations.

4. iFirma — For Advanced Users

Price: 39 PLN/month (start), 69 PLN/month (standard), 119 PLN/month (pro)

KSeF: Full support, automatic sending

Free plan: 30 days free

iFirma is Polish online platform for full business management. Besides invoicing: KPiR, JPK-VAT, tax returns, warehouse management, multi-currency and e-commerce integration (WooCommerce, Prestashop, OpenCart).

Solution for businesses outgrown startup stage but not yet needing full accounting software.

For whom: Small enterprises, online shops, businesses with teams.

Pros: Full KSeF automation, e-shop integration, multi-currency, warehouse, KPiR, JPK.

Cons: Higher start price (39 PLN/month), no free version, steep learning curve.

5. FakturaXL — Best for Up to 10 Invoices/Month

Price: 0 PLN for 10 invoices/month (forever!), 49 PLN/month (unlimited)

KSeF: Supported, automatic sending

Free plan: Yes, no time limit for 10 invoices/month

FakturaXL for small businesses avoiding invoicing software costs. Free plan allows 10 invoices monthly forever — no time limits.

Interface simple. Choose invoice template, fill data, program automatically sends to KSeF. All in one place.

For whom: Micro-businesses with fewer transactions, startup JDG.

Pros: Free without time limits, automatic KSeF sending, simple interface, VAT handling.

Cons: 10 invoice/month limit (paid plan 49 PLN), no advanced reports.

6. Comarch — For Advanced Firms and Accounting Offices

Price: From 200 PLN/month (on request)

KSeF: Full integration, automation + reporting

Free plan: No, but testing available

Comarch is ERP for large and medium businesses. Not just invoicing — complete business management system: invoices, accounting, HR, payroll, warehouse, production, sales, customer support (CRM).

For businesses with 10+ employees, growing, complex processes.

For whom: Medium and large firms, accounting offices, production companies.

Pros: Complete ERP, full business automation, KSeF + JPK + tax reporting integration, accounting office support.

Cons: Expensive, requires implementation (2-4 weeks), staff training, not for small businesses.

7. Symfonia eBiuro — Cloud-Based Comprehensive Platform

Price: From 59 PLN/month (invoices), 99 PLN/month (full accounting)

KSeF: Full integration, automatic sending

Free plan: 30 days free

Symfonia for accounting offices and small businesses. Handles: invoices, KPiR, JPK-VAT, taxes, HR, payroll, warehouse.

Main advantage: cloud-based — no installation, no backups, access from any device.

For whom: Accounting offices, businesses delegating accounting, remote teams.

Pros: Cloud-based, full KSeF integration, JPK, KPiR, accounting office support, multi-user access.

Cons: More expensive than Fakturownia, learning curve, limited e-commerce integration.

8. Best Options for Small Shops

For small shops and point-of-sale, options include integrations with warehouse systems, receipt handling, and thermal printer support. These allow fast digitalization of sales.

9. Government Taxpayer App — Zero-Cost Option

Price: 0 PLN (within KSeF)

KSeF: Native system, no integration

Free plan: Completely free

Tool created by Ministry of Finance. Every VAT taxpayer has access to Taxpayer App — web interface for issuing, receiving and viewing invoices in KSeF.

Completely free but very basic — no advanced reports, no warehouse integration, no automation.

For whom: Medium businesses issuing 5-20 invoices monthly without advanced features.

Pros: Completely free, official government system, secure, access from any device.

Cons: No third-party integration, all manual, no accounting reports.

10. aFaktury — Simple Online Software

Price: 0 PLN (free), 39 PLN/month (pro)

KSeF: Supported, manual sending

Free plan: Yes, no limits

Polish online invoicing software. Free version has all basics: invoices, JPK, KSeF integration. No payment required.

For whom: Micro-businesses, JDG wanting free software.

Pros: Completely free, Polish support, KSeF support, simple interface.

Cons: No automatic KSeF sending, limited reports, smaller user community.

Comparison Table of TOP 10 Software

How to Choose the Right Software?

For micro-businesses (1-3 invoices/week): inFakt, FakturaXL, aFaktury — free options

For small businesses (automatic KSeF needed): Fakturownia, wFirma — affordable automation

For growing businesses: iFirma, Symfonia — comprehensive features

For enterprises with complex needs: Comarch, Wistim — full ERP