Simple Invoices

    What is Simple Invoices

    Simple Invoices is a web-based invoice management system: free, open-source, and self-hosted. It lets you create, manage, and send invoices from any device with a browser. No app installation required.

    It's built on a traditional LAMP stack (PHP + MySQL/MariaDB/PostgreSQL/SQLite) and has been running since 2005, making it one of the longest-running open-source invoicing projects.

    Installation → Get Simple Invoices running

    Key Capabilities

    • Create invoices: Itemised (line-by-line) or total-style invoices
    • Manage customers & billers: Detailed client and vendor records with custom fields
    • Track payments: Record payments, accept online payments via 9 gateways
    • Recurring invoices: Automate repeat billing on any schedule
    • Multi-language: 41+ languages, per-invoice language settings
    • Multi-currency: 40+ currencies with locale-aware formatting
    • Multi-domain: Run multiple isolated invoice workspaces from one install
    • PDF invoices: Generate professional PDFs with your logo
    • Email invoices: Send invoices with PDF attachments via SMTP
    • Reports: Sales, debtor, profit, and aging reports with charts

    How It Works

    1. Set up billers (your company details) and customers
    2. Add your products or services
    3. Create an invoice: select biller, customer, items, tax, and preferences
    4. Send via email with PDF attachment, or download/print the PDF
    5. Track payments and view reports

    Next Steps