Simple Invoice & Billing Generator

Simple Invoice & Billing Generator — Overview

A focused, ready-to-deploy PHP and MySQL invoicing tool for small businesses, freelancers, and agencies who need to create, number, and track invoices without paying a monthly subscription to a SaaS billing platform. Add your clients, build an invoice line by line, and move it through Draft, Sent, and Paid — with totals and tax calculated automatically and a running view of what's still outstanding.

Who This Is For

• Freelancers and small service businesses invoicing a handful to a few dozen clients and tired of Word/Excel invoice templates.
• Developers and agencies who need a clean invoice data model as the base for a client's billing project.
• Shops and clinics that want simple, sequentially numbered invoices without a full accounting suite.

This is a straightforward invoicing tool, not a full accounting or GST-filing system — there are no recurring invoices, multi-currency support, or automatic tax-return generation out of the box. Those are realistic customizations for a PHP developer to add on the included schema.

Key Features

Sequential Auto-Numbering

Every invoice gets the next number in sequence (INV-0001, INV-0002, ...), claimed inside a database transaction so two invoices created at the same moment can never receive the same number.

Automatic Totals You Can Trust

Line-item amounts are always calculated on the server from quantity times rate, and the invoice subtotal, tax, and total are recomputed every time an item is added or removed. Nothing depends on a browser-submitted total.

Draft, Sent, Paid — With Guard Rails

Invoices move forward only: Draft to Sent to Paid. Items can be added or removed only while an invoice is a Draft, so once an invoice has been sent, its numbers stay final and can't be quietly edited.

Clients and a Live Dashboard

Keep client records, filter invoices by status, and see your outstanding amount and this month's paid total at a glance.

What's Included

The full, unobfuscated PHP source and a MySQL schema file ready to import, with the default admin login already seeded. Setup takes about 10-15 minutes on any standard PHP + MySQL hosting.

Technical Requirements

PHP 7.4+ (verified compatible with current PHP 8.x), MySQL 5.7+ or MariaDB 10+, and the mysqli extension. Plain PHP, no framework dependency, easy to read and extend.

Exact Buy & Setup Process

Step 1 — Buy Now

Click Buy Now, enter your name, email, and phone, and pay via Razorpay (UPI, cards, netbanking, wallets).

Step 2 — Get Your Download

The download link appears instantly and is emailed to you — valid 7 days, up to 5 downloads.

Step 3 — Upload and Configure

Extract the zip, upload to your hosting, create a MySQL database, and update the four values in config.php.

Step 4 — Import and Log In

Import sql/schema.sql via phpMyAdmin, log in with the default admin (admin / admin123), and change the password immediately.

Frequently Asked Questions

Does it handle GST?

It applies a single tax percentage you choose per invoice and shows subtotal, tax, and total. It does not split CGST/SGST/IGST or generate GST returns — that would be a customization.

Can I print or download an invoice as a PDF?

The invoice page is a clean printable view you can save as PDF from your browser's print dialog. Built-in PDF generation is a realistic add-on for a developer.

Can I edit an invoice after sending it?

No — that's deliberate. Items can only change while an invoice is a Draft, so sent and paid invoices stay final and auditable.

Is the commercial license included?

Yes — every purchase includes a genuine commercial license for your own business or client work.

Is it verified on PHP 8?

Yes — linted clean, with the core totals and status logic tested before listing.

Do you offer a refund?

Purchases are non-refundable once paid — see the refund policy. If something is genuinely wrong, raise an issue from your orders page and we'll help fix it.

Is support included?

Yes — email support is included with every purchase.