7 Best Free Invoice Software in 2026: The Complete Guide to Free Invoicing

You need to send invoices. You do not want to pay €30/month for the privilege. Fair enough.

The good news: there are genuinely good free invoice software options in 2026. The bad news: "free" does not always mean what you think. Some tools limit you to 5 invoices per month. Others charge transaction fees. A few are truly generous.

This guide compares the 7 best free invoicing apps honestly — what you actually get for free, where the catches are, and which one fits your situation best.

Quick Comparison Table

1. KipBill — Best Free Invoice Software: A Complete Platform with AI

Free plan includes: Unlimited invoices, unlimited quotes, credit notes, 5 clients, 3 templates, withholding tax (IRPF), multiple tax rates per line, AI assistant (10 messages/month), receipt scanning with line-by-line extraction

KipBill is not a simple free invoicing tool. It is a complete invoicing and financial management platform that offers more for free than most paid software.

What makes KipBill stand out:

Invoicing & AI (Free Plan):

• Unlimited invoices with withholding tax support
• Unlimited quotes convertible to invoice with one click
• Credit notes for cancellations and refunds
• Multiple tax rates per line item
• Voice invoice creation in 12 languages
• Chat-based creation for invoices, quotes, expenses, and credit notes
• Receipt scanning with per-item tax detection
• File upload (Excel, CSV) with AI parsing
• Business queries ("How much did I invoice this month?")
• WhatsApp sharing and file attachments (PDF, images, CSV)

Financial Management (from Starter - €3/month):

• Recurring invoices (weekly, bi-weekly, monthly, quarterly, yearly)
• Auto-reminders for overdue invoices
• Bulk email sending

Professional Platform (from Pro - €5/month):

• Multi-user up to 100 with 3 roles (Admin, Editor, Viewer)
• Multiple businesses per account
• Online payments via Stripe Connect
• Partial payment tracking
• Client portal with custom domain
• E-signatures
• Full REST API (v1) — invoices, quotes, expenses, products, clients
• Custom SMTP and email open tracking
• Custom branding and number prefixes

Reports & Accounting (Pro):

• Profit & Loss (P&L) report
• Tax report with breakdown by rate
• Income report by client and period
• Aging report for overdue analysis
• CSV export for everything

Client & Product Management:

• Client groups with shared defaults (currency, language, payment terms)
• Per-client currency and language
• Product/service library with inventory tracking
• Vendor management

International:

• 12 native languages, 30+ currencies, 25 industry-specific templates, bank details (IBAN, SWIFT) on invoices

The free plan has no time limit and no credit card required.

Best for: Freelancers, consultants, and businesses that need a complete invoicing platform — not a basic tool.

Try KipBill free →

2. Wave — Best Free Invoice Maker for North American Solopreneurs

Free plan: Unlimited invoices, unlimited quotes, unlimited clients, basic reports

Wave has been the go-to free invoicing app for years. Core invoicing is free with no invoice or client limits.

The catch: Wave makes money through payment processing (2.9% + $0.60 per transaction). If clients pay by bank transfer, Wave costs nothing. Card payments add up fast.

Limitations: Only 2 languages, no withholding tax, no AI, no multi-user with roles, no API, no client portal, US/Canada focused.

Best for: Solopreneurs in the US/Canada receiving bank transfers.

3. Zoho Invoice — For Zoho Ecosystem Users

Free plan: 5 invoices/month, 5 quotes, 5 clients, time tracking

Solid but restrictive. Shines in Zoho ecosystem integration. No AI, no line-by-line receipt scanning.

Best for: Zoho ecosystem users with fewer than 5 clients.

4. Invoice Ninja — Best Free Self-Hosted Invoicing

Free plan: Unlimited everything (self-hosted)

Open-source and genuinely free if you host it yourself. Requires technical knowledge (server, domain, PHP maintenance). Hosted version costs $10/month.

Best for: Developers who want full control.

5. Factura Directa — For Spanish Micro-businesses

Free plan: 3 invoices/month, 3 clients

Very limited free tier. Solid for Spanish compliance (Modelo 303, 347, SII) but essentially a trial.

Best for: Spanish freelancers testing the platform.

6. Billin — For Spanish Freelancers

Free plan: 30 invoices/year, unlimited clients, Modelo 303 preparation

30 invoices per year (~2-3/month). Good for Spanish tax compliance. No AI, no API, no multi-user (except €83/month plan), no client portal, Spanish only.

Best for: Spanish freelancers with very few invoices who prioritize tax compliance.

7. Contasimple — Basic Invoicing + Accounting

Free plan: 5 invoices/month, 10 clients, basic accounting, expense tracking

Combines invoicing with basic accounting. 5 invoices/month is restrictive but includes expense tracking. No AI, no API, no multi-language.

Best for: Spanish freelancers wanting basic accounting bundled with invoicing.

What "Free" Really Means: Exposing Hidden Costs

1. Invoice Caps

Many tools advertise "free" but limit to 3-5 invoices/month. KipBill and Wave offer truly unlimited.

2. Payment Processing Fees

Wave's invoicing is free, but card payments cost 2.9% + $0.60. On €10,000/year, that is €296 for "free" software.

3. Feature Gates

Recurring invoices, auto-reminders, multi-currency, PDF export — many platforms charge for these basics.

4. No Multi-User

Most free plans are single-user. KipBill's Pro plan (€5/month) supports up to 100 users with admin/editor/viewer roles.

5. No Withholding Tax

For freelancers in Spain and other countries with withholding tax requirements, a tool without this is useless for B2B invoicing. KipBill includes it free.

6. No Reports

Most free invoicing tools have no P&L, tax, or aging reports. KipBill Pro includes all four.

Advanced Feature Comparison (Free Plans)

Which Free Invoice Maker Should You Choose?

Choose KipBill if:

• You want the most complete free invoicing platform available
• You need withholding tax support
• You want AI-powered invoice creation by voice and chat
• You need receipt scanning with line-by-line extraction
• You want a platform that scales (multi-user, API, Stripe, client portal)
• You invoice internationally (12 languages, 30+ currencies)
• You want P&L and tax reports when you scale to Pro

Choose Wave if:

• You are in the US or Canada
• You need unlimited clients free
• You do not need withholding tax, AI, or multi-language
• Clients pay by bank transfer

Choose Invoice Ninja if:

• You are a developer comfortable with self-hosting
• You want open-source with no limits

Choose Billin or Contasimple if:

• You are a Spanish freelancer with very few invoices
• You need built-in Modelo 303 compliance

The Bottom Line

For most freelancers and small businesses, KipBill offers the best free invoicing platform available. Not just unlimited invoices — but withholding tax, credit notes, multiple tax rates, AI assistant with 45+ tools, receipt scanning with per-item tax detection, 12 languages, and 30+ currencies.

And when you grow, KipBill grows with you: multi-user up to 100, P&L and tax reports, Stripe payments, client portal, e-signatures, REST API, inventory tracking, vendor management — all from €3/month (Starter) or €5/month (Pro).

No other free plan offers this combination.

Start invoicing free with KipBill →