Updated 25 September 2026

WooCommerce cart guide

How to add multiple WooCommerce products to the cart with one button

Create one fixed bundle with the products, exact variations, and quantities every customer must receive. One Add to cart action adds your complete preset, with its products and quantities already chosen.

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v0.1.0 · 54 KB · WordPress 6.8+ · WooCommerce 9.9+ · PHP 8.2+ · GPL-2.0-or-later

Opens the GitHub release page.

Need help installing? Follow the installation steps.

Try the live demo Release notes and checksum View source on GitHub

WooCommerce product page showing a fixed bundle and one Add to cart button — **One bundle action** Customers see every required item and add the complete fixed bundle from one product page. Open full-size One bundle action image

Example: a workshop starter kit

You sell a notebook and two blue marker sets to workshop attendees. Instead of finding three items, shoppers open the starter kit and select Add to cart once.

The cart shows the kit as one clear group. Each item keeps its own line, so prices, stock, tax, and shipping stay correct.

WooCommerce cart showing a fixed bundle container and its required component lines — **Cart structure** One product-page action creates a clear bundle group with native component lines. Open full-size Cart structure image

One bundle line

The parent line groups the purchase without adding a second price or tax charge.

A total from item prices

The total is the current price of each component multiplied by its fixed quantity.

Stock checked per item

WooCommerce checks the total quantity of each item in the cart, and checks it again before checkout.

Use a fixed bundle when every item is required

The key question is who chooses the contents. A fixed bundle fits when you define the complete set before the shopper arrives.

Comparison of fixed bundles and customer-selected WooCommerce products
Question	Fixed bundle	Customer-selected products
Who chooses the products and quantities?	The store owner chooses every required simple product or exact variation, and its fixed quantity.	The shopper chooses from a grouped product, order form, or configurable product.
What does the cart action add?	It adds the bundle line and all required component lines together.	It adds only the products and quantities that the shopper selects.
Best fit	Starter kits, repair kits, gift sets, and product packs with fixed contents.	Product lists, build-your-own kits, mix-and-match boxes, and optional add-ons.

Compare grouped products and fixed bundles Read the official WooCommerce comparison

Set up one-button bundle add to cart

Start with real WooCommerce products. Their price, stock, tax, and shipping settings stay the source of truth.

Prepare the products

Check the price, stock, tax, and shipping data of each simple product or exact variation.
Create a Bundle product

Add a new product, enter its customer-facing content, and choose Bundle in Product data.
Add items and quantities

Select each required product or exact variation. Set its fixed quantity, then save the bundle.
Test on a staging site

Open the product page and select Add to cart. Check each item, quantity, total, and stock result.

Follow the complete setup guide

Multiple-product cart questions

What does the cart show after one click?

The cart shows a zero-value line with the bundle name and one line for each required item. The item lines keep the detail WooCommerce needs for orders and refunds.

Can the bundle include a specific product variation?

Yes. You choose one exact existing variation, such as a size or colour, and its fixed quantity.

How is the bundle price calculated?

The price is the sum of the current item prices multiplied by their quantities. See how bundle pricing works.

What happens when one item is out of stock?

Shoppers cannot buy the bundle when a required quantity is unavailable and WooCommerce backorders are not allowed. Stock is checked again before checkout.

Create your first bundleSet up a bundle product step by step. Grouped product or bundleChoose the right buying flow for a kit. Bundle exact variationsInclude a set size or colour in the kit. Bundle stockSee how the kit follows item stock. Bundle pricingSee how the kit total is calculated. Bundle or variable productChoose between a kit and product options. Product kitsPlan starter kits, refill kits, and gift sets. Sell products in packsOffer multipacks of one product. A free bundles optionCompare a free option for fixed kits.

Also from we-wp: Advanced Invoices creates numbered PDF invoices from your WooCommerce orders. Advanced Quotes turns price requests into paid orders.

Want the full picture? See what Advanced Bundles Free includes.

Add the complete kit from one product page.

Download Advanced Bundles Free and install it on a staging site. Then test one Add to cart action with your real products.