Ivan Popov

This plugin lets you attach an extra fee — either a percentage of the cart subtotal or a fixed amount — to any WooCommerce payment gateway or shipping method. Configuration lives under WooCommerce → Settings → Checkout Fee.
Typical use cases:
<ul>
<li>Pass card-processing surcharges to customers paying with specific gateways.</li>
<li>Add a handling fee for Cash on Delivery.</li>
<li>Add a packaging/insurance fee for express shipping methods.</li>
</ul>
Features:
<ul>
<li>Per-method configuration — every payment gateway and shipping method has its own settings.</li>
<li>Choose between a percentage of cart subtotal or a fixed amount.</li>
<li>Optional taxable flag so the fee can be included in tax calculations when required.</li>
<li>Customisable fee label shown to the customer.</li>
<li>Works with the classic checkout and the block-based Cart & Checkout.</li>
<li>Declares compatibility with WooCommerce High-Performance Order Storage (HPOS).</li>
</ul>

Payment and Shipping Method Checkout Fee for WooCommerce

Add a percentage or fixed fee to any WooCommerce payment method and shipping method at checkout.

krishnadas8119

KrishnaDas COD Fee for WooCommerce allows store owners to add a fixed fee when customers select the Cash on Delivery payment method during checkout.
The fee is automatically added to the order total and displayed throughout the WooCommerce order process.
Perfect for stores that want to charge an additional handling or processing fee for Cash on Delivery orders.
<h3>Features</h3>
<ul>
<li>Add a fixed COD fee to WooCommerce orders</li>
<li>Fee applies only when Cash on Delivery is selected</li>
<li>Custom fee label</li>
<li>Custom fee amount</li>
<li>Optional taxable fee support</li>
<li>Automatic checkout total updates</li>
<li>Fee displayed in:
<ul>
<li>Checkout totals</li>
<li>Customer order details</li>
<li>Admin order details</li>
<li>WooCommerce emails</li>
</ul>
</li>
<li>HPOS compatible</li>
<li>Lightweight and easy to configure</li>
<li>WordPress coding standards followed</li>
<li>Translation ready</li>
</ul>
<h3>Documentation</h3>
Plugin Website: 
https://hmsmanager.com/krishnadas-cod-fee-for-woocommerce/
Visit the plugin website for setup instructions, screenshots, FAQs, and support resources.
<h3>Security</h3>
The plugin follows WordPress security best practices.
<ul>
<li>Data sanitization</li>
<li>Output escaping</li>
<li>Direct access protection</li>
<li>WordPress Settings API</li>
<li>Capability checks</li>
</ul>

KrishnaDas Cash On Delivery Surcharge for WooCommerce

Add a fixed Cash on Delivery (COD) fee to WooCommerce orders.

Payment and Shipping Method Checkout Fee for WooCommerce vs KrishnaDas Cash On Delivery Surcharge for WooCommerce