Frost Invoice
Complete self-hosted invoicing & billing system for small businesses
Invoices, Quotes & Credits
Create professional invoices, convertible quotes (one-click convert to invoice), and credit notes with line items, tax, and notes.
Client Self-Service Portal
Customers log in to view invoices, track payment history, download PDFs, and pay online. Admin can impersonate any client account.
Online Payments
Accept credit and debit cards via Stripe or Square. Invoices auto-update to paid when the webhook confirms payment.
Agent / Employee Roles
Give staff limited access to manage clients and invoices without exposing settings, expenses, or financial data. No delete permissions.
Email System
Send invoices, quotes, and credits by email with customizable HTML templates and placeholder variables. PHP mail or SMTP.
Reports & Expenses
Track one-time and recurring expenses by category. View financial reports with charts. Export everything to QuickBooks CSV.
Branded PDF Generation
Invoices, quotes, and credits render as professional PDFs with your logo, business info, and line items. Live preview in the editor.
Security Hardened
CSRF protection, rate limiting, prepared statements, bcrypt passwords, session hardening, security headers, and account lockout.
Client Portal Management
Invite clients to the portal, send password resets, and log in as any client from the admin panel to see exactly what they see.
Tax & Totals
Configurable sales tax rate auto-applied to all invoices and quotes. Server-side calculation prevents client-side tampering.
Public Splash Page
Professional landing page for your business with hero, features, contact info, and portal sign-in. Fully customizable from settings.
Easy Installation
4-step browser installer. Upload, create a database, run the wizard. Works on any cPanel, CyberPanel, or LAMP host. No SSH needed.
See It in Action
Real screenshots from the live demo
What's Included
Simple, transparent pricing
Buy once, use forever. Optional renewal for ongoing support.
Frost Invoice is a professional, self-hosted invoicing and billing platform built for small businesses, freelancers, and service shops. Create invoices, send quotes, issue credits, accept online card payments via Stripe and Square, generate branded PDFs, and manage clients — all from a clean Bootstrap 5 admin panel. No monthly fees. You own your data.
Key Features
- Invoices, quotes (convertible to invoices), credit notes
- Full client management with CRUD
- Client Portal — customers log in to view invoices, track payments, and pay online
- Agent / Employee Roles — give staff limited access to create invoices and manage clients without exposing settings, expenses, or financials
- Online card payments via Stripe or Square with automatic status updates
- Email system — send invoices, quotes, and credits by email (PHP mail or SMTP). Customizable templates with placeholders
- Branded PDF generation with your logo
- Expense tracking, recurring expenses, financial reports
- QuickBooks-compatible CSV export
- Privacy Policy & Terms of Service management
- 4-step installation wizard — no SSH required
- Security hardened: CSRF protection, rate limiting, prepared statements, session hardening, security headers
- PHP 8.1+, MySQL/MariaDB, works on any cPanel or CyberPanel host
What’s Included
Your purchase includes the complete application, instant license delivery, and email support. Install on 1 domain (can be moved anytime from your account). Optional $29/year support & updates renewal available — not required to keep using the software.