Everything a growing business needs to bill with confidence.
Trex Billing Suite is built for practical daily operations across many categories: quick invoices, accurate stock or service records, clear party ledgers, secure account access, and protected workspace records.
Sales invoices
Create customer invoices with product or service, quantity, sale price, received amount, due amount, and invoice number.
Inventory and service control
Track product name, SKU, service name, sale price, purchase price, stock quantity, and low-stock levels in one place.
Customer and supplier parties
Maintain party records with phone, email, type, opening balance, and updated balance after billing.
Receivable visibility
Record paid amount during invoicing and keep pending dues visible from dashboard summaries.
Private workspace storage
Every registered business receives a protected data folder connected to the account owner.
Shared hosting ready
Built with PHP, server-side sessions, `.htaccess` protection, and standard shared-hosting friendly routing.
Invoice flow that keeps stock and dues connected.
Sales billing is not only a printable bill. In any business, every sale affects product stock or service records, customer dues, cash collection, and future reporting. Trex Billing Suite keeps these records connected from the moment an invoice is saved.
The selected entry carries SKU, stock, sale price, purchase cost, or service value.
The system checks stock and uses the entered quantity for total calculation.
Received amount and due amount are stored with the invoice.
Stock reduces, party balance updates, and dashboard totals refresh.
Large enough for serious work, simple enough for daily use.
Sales and invoices
- Invoice number sequence
- Customer selection
- Product, service, quantity, and price entry
- Paid and due amount tracking
- Invoice history table
Inventory
- SKU and product or service name
- Sale and purchase prices
- Current stock quantity
- Minimum stock level
- Stock value summary
Parties
- Customer and supplier types
- Phone and email records
- Opening balance
- Running balance
- Party list for quick search
Security and storage
- Password-based login
- CSRF protection on forms
- Password hashes in account database
- Workspace folder per business
- Direct file access blocked
Dashboard numbers that help owners check the business quickly.
The dashboard focuses on the key numbers a business owner usually checks first: total sales, today's activity, inventory value, receivable amount, invoices, and low-stock products.
Know the total value of saved invoices in the workspace.
See pending dues created from partially paid invoices.
Estimate inventory value using purchase cost and available stock.
Use audit records to understand important workspace actions.