Endless aisle is a retail strategy that lets in-store shoppers buy products that aren’t stocked at that location. When a customer wants a different size, color, or variant, a store associate can find the item at another store or warehouse and complete the sale in person.
Out-of-stock items can send customers elsewhere. AlixPartners found that two-thirds of consumers will leave a store or ecommerce site and shop with another retailer when the item they want isn’t available. Endless aisle gives retailers a way to recover those sales without stocking every SKU in every store.
This guide explains what the endless aisle is, how to set it up with Shopify POS, and how to measure return on investment (ROI).
What is endless aisle?
Endless aisle is a retail strategy that lets in-store shoppers buy products that aren’t stocked in that location. Store associates use inventory data, point-of-sale (POS) systems, and fulfillment settings to complete the sale.
Unlike ecommerce or buy online, pick up in-store (BOPIS), an endless aisle order begins in a physical store. The order can ship to the customer’s home, ship to a store for pickup, or ship from another warehouse.
Endless aisle purchases can work in three ways:
- Associate-led ordering through Shopify POS
- Customer-led browsing through QR codes
- In-store kiosk ordering
With Shopify POS, associates build in-store carts, add products, and add customer profiles. When an item isn’t available for pickup, associates place an order that ships to the customer. Shopify POS syncs with the Shopify admin, allowing store owners to manage orders and inventory across retail locations and online stores.
How endless aisle works in retail
Endless aisle connects the in-store shopping experience to inventory from other locations. Here’s the step-by-step endless aisle process.
- A customer wants an item that isn’t available in-store
- The associate checks inventory and product options
- The customer chooses delivery or pickup
- The order routes to the right fulfillment location
1. A customer wants an item that isn’t available in-store
Endless aisle can apply when a shopper finds a product in-store, but the size, color, or variant they want isn’t stocked at that location. The same workflow can apply to warehouse-stocked, online-only, or bulky items.
With Shopify POS, store staff can complete the sale and arrange shipment to the customer without asking the customer to restart the purchase online.
2. The associate checks inventory and product options
For endless aisle to work, store staff need accurate inventory visibility across retail stores, warehouses, and other fulfillment locations.
Shopify’s multilocation inventory setup lets retailers track stock by location, so associates can check whether another location has the item available.
3. The customer chooses delivery or pickup
Once the item is confirmed, the associate can help the customer choose a fulfillment method. In Shopify, that can include shipping the order to the customer or combining carryout items with shipped items in the same transaction if that workflow is enabled.
This keeps the in-store transaction connected to available inventory outside the local shelf. The associate can complete the transaction even when the local store doesn’t have the exact item.
4. The order routes to the right fulfillment location
In Shopify, shipped POS orders follow the store’s order routing configuration, similar to online orders. Store owners can prioritize locations, apply fulfillment rules, and configure shipping settings so orders route to an eligible store or warehouse based on the store’s routing rules.
Endless aisle depends on a shared catalog, accurate location setup, inventory availability, and fulfillment configuration.
Benefits of endless aisle for retailers
Endless aisle in retail achieves these outcomes:
Capture sales
Store staff can place an order for home delivery when a product isn’t available at that location. Sportswear brand Elite Eleven averages more than 30 ship-to-customer orders per day through endless aisle, according to founder and CEO Benn Martiniello.
“With Shopify POS and endless aisle, we can provide customers with the option to ship products that are not in-store, directly to their homes,” says Benn. “We are averaging over 30 ship-to-customer orders per day, which are sales we may have missed without this functionality.”
Expand assortment
Endless aisle lets stores sell products that aren’t physically stocked in a store or showroom. Oz Hair & Beauty grew its online product range to more than 15,000 items and used Shopify POS to support ship-to-home orders. Within a year, in-store sales increased from about 5% to 20% of overall sales.
“Because we no longer need extensive developer input and third-party POS integrations, we quickly grew the retail side of our business and launched seven stores,” says Anthony Nappa, CEO and chief customer officer of Oz Hair & Beauty.
Improve associate-led selling
Associates can sell items from other locations during an in-store interaction. Bared Footwear’s endless aisle fulfillment now represents 4% of in-store orders, giving associates another way to complete orders when the right item isn’t on the shelf.
“With Shopify, we have a unified commerce platform that makes the holistic experience we want to offer customers possible without burdening our team with clunky workarounds or high-risk situations,” says Alexandra McNab, COO of Bared Footwear.
Reach hybrid shoppers
Gen Z shoppers often discover products online and buy in stores. Deloitte’s Q3 2025 retail trends report found that 64% of Gen Z use social media to research products, while 73% shop in person at least once a week.
For retailers, this means product discovery and purchase may happen in different channels. Endless aisle gives store teams a way to connect those moments when a shopper visits a store but the exact product, size, or color isn’t available on the shelf.
What endless aisle technology do retailers need?
Retailers need connected store, inventory, and fulfillment systems to launch an endless aisle. In Shopify, the core capabilities look like this:
| Requirement | Why it matters | Shopify capability |
|---|---|---|
| Unified product catalog | Customers need consistent product information across in-store and online channels. | Uses a shared admin to manage product data for in-store and online selling. |
| Inventory visibility across locations | Staff need to know whether another store or warehouse can fulfill an item. | Syncs inventory across locations and gives staff visibility into stock across the business. |
| Connected POS and ecommerce | Orders, inventory, and customer data need to stay aligned in one system. | Shopify POS and online selling run from one back office with connected data. |
| Location management | Retailers need to track stock across stores, warehouses, and other fulfillment points. | Lets retailers set up multiple locations and track inventory separately at each one. |
| Shipping and fulfillment | Shipped orders must be fulfilled from the right location. | Uses order routing rules to determine how shipped orders are fulfilled. |
| Staff permissions | Staff need the right access without exposing sensitive information. | Uses staff roles, PINs, location assignment, and permissions to control access. |
| Hardware and mobile selling | Associates need to serve customers anywhere on the floor. | Supports mobile selling and works with connected hardware such as barcode scanners. |
Shopify is one example of a platform built for this kind of unified commerce workflow. It combines POS, ecommerce, inventory, and order management in one system, which gives store owners an endless aisle solution without relying on disconnected tools.
In practice, that means store associates can access product and inventory information across locations and still complete the sale when the item isn’t available in-store.
How to set up endless aisle with Shopify POS
When an item is out of stock in-store, staff can still save the sale by ordering it from another location or warehouse. With Shopify POS, staff can check inventory across locations, add the item to the cart, and ship the order to the customer’s address.
Here’s how to set up endless aisle:
- Decide which products you’ll sell through endless aisle. Choose items you don’t always want stocked in-store, such as online-only products, extended sizes or colors, warehouse inventory, bulky items, or long-tail variants.
- Make sure your retail location uses Shopify POS Pro. Shipping for in-store customers is available only for locations on Shopify POS Pro.
- Set up your locations. In your admin, configure the locations where you stock inventory, fulfill orders, and sell in person. Set up your retail store and warehouse as separate locations if they serve different roles.
- Assign inventory to the correct locations. For endless aisle, make sure the inventory you want to sell is stocked at the location that should fulfill shipped orders.
- Configure fulfillment behavior. If you have multiple active locations, decide how online and shipped orders should be fulfilled. Use a default location, prevent certain locations from fulfilling online orders, or set up order-routing rules to prioritize locations.
- Set up shipping rates. In your admin, configure them under Shipping and delivery. These rates are what staff will see in Shopify POS when creating a ship-to-customer order. If no applicable shipping rate exists for the cart, no rate is displayed.
- Use ship-to-customer in Shopify POS.
- In Shopify POS, add items to the cart.
- Add or select the customer.
- Add or confirm the customer’s shipping address.
- Choose the shipping method.
- Take payment and complete checkout.
- Use ship and carry out when only part of the order should ship. Items in the cart default to carry out. If part of the order should ship, staff can change those items to Ship and complete the sale in one transaction.
- Add a smart grid shortcut for faster checkout. If you often ship the full cart, add the “Ship all items” tile to the POS smart grid so associates can launch the workflow quickly.
- Train staff on the customer conversation. Use a simple script, such as, “We don’t have that size in this store, but we can order it for you here and ship it to your home.”
After setup, track whether endless aisle helps recover sales that would have been lost to out-of-stock items.
- Start with order attribution, including the percentage of in-store revenue generated by ship-to-customer transactions.
- Track average order value to see whether staff-assisted orders include products that aren’t physically available in store.
- Compare conversion rates against in-store inventory levels to see whether customers still complete purchases when local stock is low.
Review these metrics to adjust inventory by location and identify where staff need more product training.
Endless aisle ROI: how to build the business case
The return on investment (ROI) for endless aisle starts with recovered sales, or purchases customers make after an item isn’t available in-store.
Start with monthly revenue:
Estimated monthly endless aisle revenue = out-of-stock requests x conversion rate x average order value
For example, a store gets 200 out-of-stock requests per month. Store staff convert 25% of those requests into ship-to-customer orders, and the average order value is $120.
200 x 25% x $120 = $6,000 in estimated monthly endless aisle revenue
Then estimate profit after costs:
Incremental profit = estimated endless aisle revenue x gross margin – fulfillment costs – software, hardware, and training costs
Using the same example, a 45% gross margin creates $2,700 in gross profit. If fulfillment costs are $900 and monthly software, hardware, and training costs are $500, the store has $1,300 in incremental profit.
$6,000 x 45% – $900 – $500 = $1,300 in incremental profit
Endless aisle FAQ
What does endless aisle mean in retail?
Endless aisle is a retail strategy that lets in-store shoppers buy products that aren’t physically available at that location. The order can ship to the customer, route from another store or warehouse, or be prepared for pickup.
What is an example of endless aisle?
A shopper visits a shoe store and finds the right style, but the store doesn’t have the right size. The associate checks inventory in Shopify POS, confirms the size is available at a warehouse, completes the sale in store, and ships the shoes to the customer.
What are the benefits of endless aisle?
Endless aisle gives retailers a way to recover sales when items are out of stock in store. It also lets stores show more products without adding floor space, gives associates more options during customer conversations, and connects in-store shopping with fulfillment from other locations.
Is endless aisle only for large retailers?
No. Smaller retailers, showrooms, pop-ups, and growing brands can use endless aisle if they have connected inventory and fulfillment. Large retailers may use advanced order routing and store fulfillment, but the basic workflow starts with POS, inventory tracking, and shipping setup.
