Purchase Order Plugin for WooCommerce 1.1.1

A **Purchase Order (PO)** plugin for WooCommerce typically serves one of two main purposes: it either adds "Purchase Order" as a **payment method** for B2B customers at checkout, or it helps you **manage your own inventory** by generating POs for your suppliers. 

Depending on which side of the transaction you need to manage, here are the best options for 2026. 

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### 1. For Accepting POs (Customer Payment Method) 

If you sell to schools, government agencies, or businesses that need to enter a PO number during checkout to pay you later via invoice, these are the top choices. 

* **WooCommerce Purchase Order Gateway**: The official extension by WooCommerce. It is a "plug and play" solution that adds a simple PO number field to the checkout. 
* **Best For:** Simple B2B checkout where you just need to collect a reference number. 
* **Key Feature:** Automatically sets orders to "On Hold" until you manually verify the PO and mark it as paid. 


* **Purchase Orders for WooCommerce (Free)**: A highly-rated free alternative found on WordPress.org. 
* **Best For:** Small stores on a budget. 
* **Key Feature:** Includes fields for company name and address specifically for the PO, and is fully compatible with High-Performance Order Storage (HPOS). 


* **B2BKing**: A massive B2B suite that includes a PO gateway as just one of its 100+ features. 
* **Best For:** Wholesale stores that also need tiered pricing, tax exemptions, and "Request a Quote" functionality. 



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### 2. For Managing Inventory (Buying from Suppliers) 

If you need to generate POs to send to **your vendors** to restock your own shop, you need an inventory management plugin. 

* **WooCommerce Purchase Order (by Infosoft)**: This manages the entire procurement lifecycle. 
* **Best For:** Stores with complex supply chains. 
* **Key Feature:** Generates PDF/Email POs to send to vendors and tracks "Pending vs. Received" stock automatically. 


* **ATUM Inventory Management (Free/Premium)**: The most advanced free inventory tool for WooCommerce. 
* **Best For:** High-volume retailers. 
* **Key Feature:** Its "Purchase Orders" premium add-on allows for bulk restocking based on low-stock triggers. 



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### Comparison of Popular PO Gateway Plugins 

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### 💡 Summary Recommendation 

* **If you just want to let customers enter a PO number:** Start with the **Purchase Orders for WooCommerce** free plugin. It covers 90% of basic B2B needs. 
* **If you are building a full wholesale site:** Invest in **B2BKing** or **B2B for WooCommerce**. These allow you to enable POs only for "Wholesale" users while keeping standard credit card checkout for everyone else. 
* **If you need to restock your warehouse:** Look at **ATUM** to manage your inward-bound supply. 

**Would you like me to find the specific documentation on how to limit the Purchase Order payment method so it only shows up for certain user roles (like "Wholesalers")?**