$99 Websites + Website Design: Best PHP Invoicing and Billing Scripts

Do you want to automate your billing and invoicing process and receive payment faster? PHP invoicing scripts will streamline your billing and invoicing process and make it more efficient.

These scripts come with customizable templates that help you build professional invoices. They can also automatically attach and send PDF invoices to your customers via email once a transaction is complete. In addition, they have built-in tax reporting and deductions and multiple payment processing options that make it easy to receive payments from customers.

PHP invoice systems can be web-based or self-hosted on your server.

In this post, we'll look at some popular PHP invoicing scripts that are available on CodeCanyon.

Classic Invoicer — Classic Invoice is an example of Invoicing PHP scripts available on CodeCanyon.

Bestselling Invoice PHP Scripts on CodeCanyon

For a low-cost payment, you can purchase one these high-quality premium PHP invoicing scripts that come with a wealth of features and support from developers.

Also think about incorporating live chat PHP scripts on your website to help you provide well-rounded customer services that will keep your clients coming back.

Bestselling Invoice Management PHP Scripts

Best Invoicing PHP Scripts

Let's look at the nine PHP invoicing scripts on CodeCanyon that stood out for me.

1. iBilling—CRM, Accounting and Billing Software

If you're looking for intuitive and complete invoicing system then iBilling Invoice will help you create invoices quickly, track payments, and get paid faster online. You can send invoices directly to the customer from the portal. The invoice is accessable from anywhere with a unique invoice URL and an authentication token. The customer can download a PDF invoice with a single click.

With this PHP invoicing web application you can create recurring invoices, accept partial payments, attach invoice transactions with bank accounts. You can integrate it with payment gateways to make it easy for customers to pay their invoices online.

You can set your income goal and see a full history of your invoices including related transactions and sent email log.

2. Simple Invoice Manager

Simple Invoice Manager - Invoicing Made Easy

Simple Invoice Manager is a multilingual PHP-based web application that allows you to manage your invoices, payments, quotations, and customers. It has a simple and easy to use interface. The dashboard has two levels of users admin and sales. You can manage users and allow customers to log in, view their invoices, update their details, and make payments.

Invoices can be customized by adding logos, emails, telephone numbers, and tax rates. You can add products so you can easily add them to invoices. Simply create sales and sending a PDF invoice by email. You have the option to set up recurring invoices. Customers can make payments online using PayPal and Skrill.

3. Geo POS: Point of Sale, Billing and Stock Manager Application

Geo POS is a comprehensive system packed with all the features needed to run a business, including a comprehensive point of sale solution, CRM, HRM, invoicing, inventory management, and more.

When it comes to invoicing, you can create and track invoices, add custom tax and discount rates per product, and send quotes with proposal then convert approved quotes into invoices. You can get paid online for your invoice by sending a unique invoice links with email.

In addition, you can create proforma invoices, delivery notes, and select tax types for invoices. The invoice system is integrated with the stock manager to show what's in stock for particular products.

The application has a ready-to-use REST API server, so you can link it with other applications. It integrates with popular payment gateways including Stripe, 2Checkout, PayPal, RazorPay, SecurePay, and more.

4. Hosting Billing—Domain and Web Hosting Invoicing System With CMS

Hosting Billing is a client management and invoicing system for web hosting and domain registration resellers. It comes packed with features that are designed to automate your daily tasks, saving you time and money.

Some features include:

clients can view and pay invoices in their selected currencies
4 domain search APIs
5 pricing table designs to choose from
block system that you can use to customized web page layouts

This invoicing systems is compatible with multiple payment gateways that make it easy to collect payment.

5. Classic Invoicer

Classic Invoicer is a responsive web-based invoicing and client management system helps you create custom invoices and send them to your clients by email. You can add customers using the simple client management system, create customized invoices, and manage and track your income through detailed reports.

In addition you can products to make it easy to bill them on an invoice, add taxes, manage access to system users according to roles. This system is built using Laravel 5 framework. It uses jQuery and MySQL database.

6. Neo Billing—Accounting, Invoicing and CRM Software

Neo Billing is a comprehensive billing and accounting and CRM application available in 21 languages. It manages all aspects of a business. When it comes to invoicing: invoices can include custom tax rates and discount rates per product. You can send quotations with proposal via email and convert quotes to invoices. You can receive online payments with a unique invoice link. You have access to records of invoices with specific customer including income and expense by customer.

7. Workice—The Ultimate Freelancer CRM

Workice is a web based invoicing and projects management tool for freelancers and small businesses. You can create and send invoices, estimates, track time or expenses and accept online payments.

You can create estimates and convert them to invoices when it's approve by a client. Invoices can be converted to PDFs and emailed to customers. You'll be notified when clients view invoices. You can also create recurrent invoices, send invoice reminders and securely charge your client's credit card. Payments can be received in advance. You can also choose to receive partial payment.

With Workice, you can sign and send contracts to clients for approval. It will automatically send reminders to your clients to remind them to review your contracts. Your clients can sign and approve contracts with legally binding online signatures. It will auto convert contract to project once it’s signed by client.

8. Invoicer—Invoices Generator App

Generate PDF invoices, orders, quotes and receipts from your browser by using Invoicer. You don't need to write any single line of code to use this web application. It just takes a few clicks to add clients and email them invoices.

You can customize your invoices to express your brand identity by adding custom colors and your custom logo. You can add unlimited items with automatic paging. You can include taxes per item and discount per item in percentage or flat rate. There are unlimited fields for taxes, shipping, and handling.

No installation is required. You just need to upload files and start using the application. It comes with detailed documentation and free lifetime updates.

9. m'Manager—Invoices Management System

m'Manager is built specifically for freelancers. This PHP invoicing management system will help you manage your business, automatically create and send your invoices and estimates, keep track of your turnover, tax and items sale performances.

You can customize your invoices to include tax rates and discount rates. When you change something on the invoice autocomplete will update all the fields. Your invoices and quotes numbering can include custom prefixes. You can also create recurring invoices.

There are color codes to tell you the status on an invoice or quote. Clients can approve or decline quotes by hitting a button on the quote email. You will receive notification on your dashboard informing your of the client's decision.

This multilingual PHP invoicing application supports multiple currencies. You can get paid easily thanks to multiple payment gateways it supports like Stripe, Mollie, Ingenico ePayments, and Paypal.

Free PHP Invoicing Scripts

If your budget is tight there are free PHP invoicing scripts you can download and set up for an efficient invoicing and billing system that will make your clients happy. Free PHP scripts come in all size and shapes. Some have enterprise-level features while others have limited features that allow you to get started.

1. InvoicePlane

InvoicePlane is a free, self-hosted open source invoicing application that helps you manage your quotes, invoices, clients, and payments. This highly rated invoicing script has been downloaded over 100,000 times from 193 countries.

You can customize InvoicePlane to make sure it fits your needs by selecting from different themes, set amount formats, modify email and PDF templates or many more. Your clients can pay their invoices by using one of 25 different online payment providers like PayPal, Stripe or even using Bitcoin via Coinbase. InvoicePlane is translated into many languages by community members

2. Invoice Ninja

Invoice Ninja Free and Open Source Invoicing, Expenses & Time-Tracking

Invoice Ninja is a free and open source invoicing, expenses and time-tracking app built with Laravel and Flutter. It offers a plethora of great features, including custom branded invoice design, recurring invoicing and auto-bill clients, real-time quote creation and custom proposals, expense reporting and so much more!

Invoice Ninja is also capable of handling online payments from more than 40 payment gateways, including Stripe, PayPal and WePay. It also accepts payments using credit cards, ACH, Bitcoin and more. Get paid online, organize project workflows with Kanban Boards, and track time online via your Webapp account.

3. BambooInvoice

BambooInvoice is free open source invoicing software intended for small businesses and independent contractors. This easy to use invoicing application has a clean interface that allows you to create invoices, add tax rates, and track your invoices. You can generate detailed reports that include graphs. It is available in 11 languages and is compatible with all modern browsers.

BambooInvoice is built usingPHP7.x and needs a database (MySQL and MySQLi 5+ are known to work, and drivers are included for MSSQL, Postgre, OCI8, SQLite, and ODBC). In order to generate PDFs, you'll need the DOM extension enabled.

4. PHP Invoice Script

PHP Invoice Script is a self-hosted, open source PHP and MySQL invoicing that allows you to send invoices to customers and also keep a history of those invoices. You can add and manage customers, create and send unlimited invoices, add products to catalog section and assign them to categories, add taxes in the tax section, create unlimited staff accounts and determine access according to roles. You can also get weekly, monthly or annual invoice reports from invoice management section.

5. PHP Billing System

PHP Billing System is an online invoice script that is based on PHP-MySQL and CodeIgniter. Using this system you can create and manage invoices, quotes, customers, and view reports. Customer can login to view invoices and quotes then request them to be sent by email.

Creating Terms of Payments That Get Fast Payments

Cash is the life blood of small businesses. Terms of payment are concerned with the time-frame of payment. In short, getting paid on time so you can pay your bills and keep your business open.

What does getting paid on time mean? You have to define this clearly in a way that leaves no doubt about when and how you expect to be paid.

But words you choose to use on an invoice can make it easy or difficult to get paid. You want your clients to keep coming back by creating win-win situation between you and the client.

So how do you ensure your invoices get paid fast?

Transparent Contracts

No one likes hidden surprises. It's important that the client agrees with you on payment terms explained in the contract. For big projects make clear you expect first 50% of the payment before the project begins and the remaining 50% after the project has been handed over to the client.

Professional Invoices

A professional invoice done right creates trust, removes confusion and minimizes chances that clients will question what they've billed for. You need to make sure the professional invoice does the following:

displays your business logo, name, address, telephone, and email
show client details like name, address, telephone, and email
invoice number for tracking and communication with client
clearly explained line items of services you're billing
including amount and currency billed for each line item
shows taxes and discount information
shows the grand total so the client is clear about the total amount they should pay
explains terms of payment clearly stated without any ambiguity
lists methods of payment
has a friendly note thanking clients for their business

Payment Due Dates

Be very clear about when you expect to be paid. You can write, for example, payment due on September 30, 2021. Writing out the month and date gives a sense of urgency. It also ensures the client won't overlook the due date.

Explain Commonly Used Invoice Payment Terms

If you have to use payment terms like "Net 30" or "Payment due upon receipt" then an additional line explaining exactly what they mean goes a long way to avoid confusion. Even then, it is always advisable to add the exact date the payment is due.

Invoicing and payment terms Payment terms - commonly used invoice payment terms and their meanings — Source: nibusinessinfo.co.uk

Offer Discounts on Early Payment

Offer incentive that encourage customers to make early payments. For example, you can offer 1% to 5% discount to encourage them to pay before an invoice is due.

Methods of Payment

Be very specific about your preferred method of payment: cash, checks, credit cards, bank transfer, online payments, mobile payments, or automatic payments.

Choose How You'll accept Payment — Source: sba.gov

Make it convenient for your clients to pay you and you'll be surprised how quickly they do it. Some methods you can use to make it easy for clients include:

integrating payment gateways like PayPal, Stripe, and more
asking clients about their preferred method of paying
adding a hyperlink of payment portal in your invoice or on the email with PDF invoice

Also understand that clients have more confidence that data and private financial information is secure when they use payment gateways like Paypal, or Stripe.

Polite Thank You Note

Polite communication maintains positive relationships. Have a note section that thanks your customer for doing business with you

Ask for an Online Review or Testimonial

You can also go a step further leave a link asking clients to leave an online review or testimonial on your website.

Get Your Invoicing Script Now!

The PHP invoicing scripts I've covered in this post are just a few that stood out for me. But you can find more PHP invoicing scripts on CodeCanyon. You can also have look at our PHP CRM scripts.