Fauran Invoice Manager helps small businesses manage their day-to-day billing operations directly from wp-admin, with a modular architecture and dynamic branding that adapts to your company details:

Categories and services catalog — organize services under categories, with per-service pricing and variants
Invoices — create standard and custom invoices, with tax, discount, and partial-payment support
Customer management — customer records are created or matched automatically from invoice data, with running stats (total invoices, total spend, balance due)
Reminders and follow-ups — schedule a follow-up date per invoice; a dedicated Follow-ups screen surfaces what’s due
Price snapshots — past invoices always show the price that was charged at the time, even if a service’s catalog price changes later
PDF export and printing — print-friendly invoice/receipt templates and PDF generation for invoices and reports
WhatsApp messaging — send reminder, follow-up, and invoice messages to customers directly via WhatsApp
Reports — payment and balance-due reporting, exportable to PDF
CSV import/export — bulk import customers from CSV, export customer data back out
Dynamic branding — company name, logo, address, and footer text flow through to invoices, receipts, and PDFs
Extensible — a set of action/filter hooks lets developers customize behavior without editing core files (see “For Developers” below)

Why This Plugin

Most invoicing plugins either lock core billing features behind a paywall or bring more complexity than a small business actually needs. Fauran Invoice Manager focuses on the day-to-day essentials — catalog, invoices, customers, reminders, and reports — in one modular, self-contained plugin:

No external SaaS account or API key required to create and print invoices
Dynamic branding means it looks like your business, not a generic template
Price snapshots protect the accuracy of past invoices when catalog prices change
Action/filter hooks let developers extend it without touching core files

How It Works

Set up your catalog — categories and services, each with its own price and optional variants.
Create an invoice (standard or custom), picking catalog items or entering custom line items, with tax, discount, and partial-payment support.
The plugin automatically creates or matches a customer record from the invoice’s contact details and keeps running stats (total invoices, total spend, balance due) up to date.
Optionally set a follow-up date on the invoice; it will surface on the Follow-ups screen, and reminders can be sent to the customer via WhatsApp.
Print or export the invoice as a PDF, and track payment/balance-due activity from the Reports screen.

Requirements

WordPress 6.6 or later (tested up to 7.0)
PHP 7.4 or later
MySQL/MariaDB with permission to create custom tables (the plugin creates its own tables for invoices, customers, services, categories, payments, and reminders on activation)
No third-party API keys or paid services required for core functionality

For Developers

Fauran Invoice Manager exposes the following action and filter hooks. Full documentation and usage examples are available at devmubs.com/plugins/fauran-invoice-manager/docs.

Actions

faurinma_before_save_invoice — fires before an invoice is saved (create or update), before validation.
faurinma_after_save_invoice — fires after an invoice has been saved (create or update).
faurinma_before_delete_invoice — fires before an invoice and its related rows are deleted.
faurinma_after_delete_invoice — fires after an invoice and its related rows have been deleted.

Filters

faurinma_invoice_data — filters the raw invoice submission data before it’s persisted.
faurinma_invoice_number — filters the generated invoice number before it’s saved.
faurinma_company_logo — filters the company logo URL used on invoice/receipt templates.
faurinma_pdf_output — filters the final PDF bytes before they’re streamed to the browser (invoices and reports).
faurinma_show_powered_by — filters whether the “Powered by Fauran Invoice Manager” credit is shown.
faurinma_powered_by_text — filters the “Powered by” credit text.
faurinma_currency_list — filters the list of available currencies.