tacey
Install on Shopify
A single customer order can represent two opposite fulfillment problems. In one scenario, the order contains items that cannot possibly ship together. In the other, a customer places multiple separate orders that absolutely could ship together. The first case requires splitting one order into many shipments, while the second calls for merging many orders into one. Knowing which workflow to apply is key to an efficient fulfillment operation.
| Feature | Order Splitting | Order Merging |
|---|---|---|
| Purpose | Divide one order into multiple shipments. | Combine multiple orders into one shipment. |
| Typical Trigger | Logistical necessity (e.g., multiple warehouses, pre-orders). | Customer places multiple orders in a short time. |
| Effect on Shipments | One order becomes multiple packages with separate tracking. | Multiple orders become one package with a single tracking number. |
| Cost Impact | Increases shipping and material costs. | Decreases shipping and material costs. |
| Workflow Type | Reactive (responding to order complexity). | Proactive (optimizing for efficiency). |
| Customer Experience | Can cause confusion (multiple packages arriving at different times). | Simplifies delivery and reduces packaging waste. |
What is order splitting in Shopify?
Order splitting is the process of dividing a single customer order into multiple distinct shipments. This means that although the customer paid once, they will receive their items in separate packages, often at different times and with different tracking numbers. It's a common operational necessity for many stores.
Shopify is built to accommodate this reality. If your inventory is spread across multiple warehouses or fulfillment centers, Shopify’s location-based fulfillment naturally creates split shipments. [0] An order containing one item from your Toronto warehouse and another from your Vancouver facility will be routed as two separate fulfillments. This happens automatically based on your location and shipping settings.
The core principle is simple: one order, multiple boxes. The complexity arises from managing the cost and customer communication that this creates. Each split requires its own shipping label and its own tracking updates, adding layers to what started as a single transaction.
When should you split a Shopify order?
You should split an order only when its items physically cannot or should not ship together. This decision is almost always driven by inventory logistics and product characteristics, not by choice. It's a reaction to the realities of your stock and fulfillment network.
One of the most common triggers is fulfilling from multiple physical locations. If a customer orders two products, and each is only stocked in a different warehouse, you have no choice but to split the fulfillment. Each location will receive its own fulfillment request for the items it holds, and they will ship their portion of the order independently.
Another frequent reason is handling backorders or pre-orders. A customer might buy one item that is in stock now and one that will not be available for three weeks. Splitting the order allows you to ship the available product immediately, rather than making the customer wait for the entire order to be ready. This improves the customer's experience, but it doubles your shipping process.
Finally, some products have special shipping requirements that prevent them from being boxed with other items. This could include heavy or oversized products, fragile goods that need specific packaging, or items that require temperature control, like frozen foods. To ensure product safety and integrity, these items must ship alone, forcing a split.
What are the downsides of splitting orders?
The main disadvantages of splitting orders are increased shipping costs, greater operational complexity, and a higher chance of customer confusion. While sometimes necessary, splitting is a workflow that introduces friction and expense at every step of the fulfillment process. Every split shipment is another process to manage and another potential point of failure.
Consider a customer who orders a heavy hoodie and a lightweight t-shirt. If the hoodie ships from your main warehouse but the t-shirt is only at a secondary location, you must split the order.
Shipping them together would involve one package and one base shipping fee. Shipping them separately means paying that base fee twice. Carrier pricing rarely scales linearly with weight; two small packages are almost always more expensive than one larger package of the same total weight. This is because each shipment incurs its own base rate and handling charges, directly increasing your total cost and eroding the order's profit margin. [3]
This highlights a key trade-off: **Margin vs. Immediacy**. You might split an order containing a pre-order item just to send the in-stock product to the customer now. This improves their experience but directly reduces the order's profitability. It is a conscious business decision, not just a logistical one.
The most immediate impact is on your shipping budget. Two packages require two shipping labels, effectively doubling your cost for that order. Even if the combined weight is the same, carrier pricing structures often make two small packages more expensive than one larger one. This erodes the profit margin on the original sale.
Operationally, each split creates more work for your warehouse team and more data for your support team to track. Instead of one tracking number, you now have several associated with a single order. This complicates "where-is-my-order" (WISMO) inquiries, as a customer may receive one package and assume the order is complete, leading to confused and frustrated support tickets.
Split orders can also create challenges for your analytics. Unless you have a reliable system for tagging and tracking them, a single order that is split into three shipments might appear in some reports as three separate transactions, skewing your order count and average order value (AOV) metrics. [2]
What is order merging in Shopify?
Order merging is the practice of combining multiple, distinct orders from a single customer into one consolidated shipment. It is the direct opposite of splitting. Instead of turning one order into many packages, you turn many orders into one package. This is a proactive measure to simplify fulfillment and cut costs.
The classic scenario happens all the time. A customer places an order at 10 PM. An hour later, before your warehouse team has started picking for the day, they remember something else they need and place a second, separate order. Both orders are going to the same address, paid for by the same person.
Without a merging process, your team would pick, pack, and ship two separate boxes, and you would pay for two separate shipping labels. A merging workflow allows your fulfillment team to spot this situation, combine the items from both orders into a single box, and ship it under one tracking number.
When is merging orders the right decision?
You should merge orders whenever a customer places multiple orders destined for the same address within your fulfillment window. The decision is almost purely financial and logistical. If you can safely fit all the items into one box and the first order has not yet been processed, merging is nearly always the correct choice.
The key is to define a daily fulfillment cut-off time. For example, your warehouse team might process all orders received before 8 AM. This creates a natural window where any orders placed overnight by the same customer are candidates for merging before fulfillment begins.
A concrete first step is to build this check into your daily process. Before printing pick lists, have your fulfillment manager filter all unfulfilled orders by customer name. This simple sort will reveal any duplicates destined for the same address, giving you a clear list of merge opportunities.
The primary benefit is a direct reduction in shipping costs. By combining two or more shipments into one, you eliminate the expense of extra shipping labels. This saving drops straight to your bottom line. Over hundreds or thousands of orders, the accumulated savings can be substantial, especially for stores with a high rate of repeat customers.
Merging also creates a better, simpler experience for the customer. They receive a single package to track and unbox, which is more convenient and generates less packaging waste. It avoids the confusion of receiving two separate boxes on the same day, ordered only hours apart. It feels like a more thoughtful and efficient service.
For your warehouse, merging simplifies everything. The fulfillment team has one consolidated pick list, one box to pack, and one tracking number to manage. This reduces the chance of errors, saves time, and simplifies the entire process from picking to dispatch. Many order merging apps on the Shopify App Store are built to enable exactly this workflow. [4]
How does merging orders affect Shopify data?
A proper merge protects your data by consolidating items onto one order and cancelling the extra one without a refund. This keeps sales and inventory records accurate, as the cancelled order's items are moved to the surviving order, ensuring revenue and stock levels are correctly reported.
This process ensures your financial reporting remains accurate. The customer paid for both orders, and no money is returned. The revenue is correctly attributed to the items, which now all live on the surviving order. Modern merging applications are designed to handle this carefully to prevent any discrepancies in your analytics.
Inventory is also correctly managed. Cancelling the redundant order returns its stock, while adding the items to the primary order draws that same stock back down. The net effect on your inventory levels is zero, which is the correct outcome. The goal is to make the change on the fulfillment side without creating phantom stock or sales figures.
Edge Case: Merging Orders With Different Discounts
Merging gets complicated when discounts are involved. Imagine a customer places one order with a "15% off" flash sale code. An hour later, they place a second order using a "free shipping" code from a different promotion. Now you have two orders with conflicting offers that may or may not be combinable.
Manually merging these is a recipe for error. If you cancel the first order, the customer loses their 15% discount. If you add those items to the second order, they will not get the discount they expected. This creates a pricing error and an inevitable support ticket.
This is where automated tools are critical. A reliable merging app will migrate the line items at their exact post-discount price. It preserves the final price the customer paid for each item, regardless of which order it came from. The financial records remain accurate because the tool respects the original transaction details.
Edge Case: Items in Different Fulfillment Locations
The ability to merge also assumes all items are in one fulfillment location. If a customer’s first order ships from your main warehouse, but their second order contains an item only stocked at a 3PL partner’s facility, they cannot be merged. The system sees them as logistically separate from the start, even if going to the same address.
Can you merge orders manually in Shopify?
No, Shopify does not provide a native, one-click feature for merchants to merge two separate paid orders. [1] This limitation is a common point of discussion in merchant communities and is the primary reason that a market for order merging apps exists. Attempting to do this by hand is not recommended.
The manual workaround is cumbersome and fraught with risk. It would involve cancelling and fully refunding one order, then using an order editing function to add the items from the cancelled order to the remaining one. This creates confusing records for both you and the customer, and it can easily lead to accounting errors or inventory mismatches. [1]
Because the process is so prone to error, most merchants rely on third-party applications to handle merging. These tools connect to the Shopify API to perform the item migration and order cancellation steps in a controlled, automated way, ensuring that all data remains consistent and accurate throughout the process.
How can Tacey simplify order merging?
Tacey simplifies order merging with a dedicated tool that lets merchants safely combine two paid orders from the same customer into one shipment. From the Tacey admin, you can turn a complex manual process into a few clicks, preventing errors and saving time on a common fulfillment task.
The process is clear and auditable. You select the two orders you wish to combine, and Tacey presents a confirmation step showing which order will absorb the other. Once confirmed, the items from the secondary order are moved to the primary one, and the secondary order is cancelled in Shopify. The cancellation happens without a refund, preserving the original payments.
This approach directly attacks the unnecessary expense of multiple shipments. By combining orders pre-fulfillment, you immediately save on shipping labels and packaging materials. Tacey’s system is built to ensure that this operational shortcut does not corrupt your sales or inventory data, keeping your reports clean. For stores with frequent repeat buyers, this is a simple way to protect margins.
The best operational tools are the ones that remove a decision you shouldn't have to be making. Deciding whether to pay for two boxes to the same front door is one of those decisions.
Because the feature set is the same across all plans, order merging is available to every merchant using Tacey, from new stores to high-volume operations. You can review the different order volume tiers on the pricing page.
So, split or merge: Which workflow wins?
Neither workflow is inherently better; they are purpose-built tools for solving opposite logistical problems. The right choice depends entirely on the situation presented by the order, not on a preference. You should use splitting for one complex order and merging for multiple simple orders from the same customer.
The decision framework is straightforward. You should split an order if it contains items that simply must ship separately. This is a workflow forced by circumstances like multiple fulfillment locations, pre-order items mixed with in-stock products, or products with special packaging needs. It is a reactive, necessary process.
Conversely, you should merge orders when a single customer places multiple orders that can and should ship together. This is a proactive workflow designed to reduce costs and simplify operations. If two orders are going to the same person and the first one is still in the fulfillment queue, merging is almost always the smart financial move.
Before your next fulfillment run, look at the orders from the past week. How many times does the same customer name appear on sequential orders that shipped in different boxes? Each one of those instances represents a direct, tangible cost that a simple order merge workflow could have saved.
Frequently asked questions
Does splitting an order create a new order number?
No, splitting an order does not create a new order number. The original order number remains the same, but it will have multiple fulfillment orders and tracking numbers associated with it within the Shopify admin.
Can customers choose to split their own shipment?
Typically, no. Splitting is a fulfillment decision made by the merchant based on logistics. While some advanced checkouts can offer split shipping options (e.g., for pre-orders), it is not a standard feature for most stores.
Does merging orders refund the customer's shipping on the second order?
This depends on the app and your policy. Most merging apps simply cancel the second order without any refund, as its items are now part of the first shipment. Some merchants choose to manually refund the second shipping charge as a courtesy.
What's the difference between merging and bundling?
Merging combines multiple separate orders into one shipment post-payment. Bundling allows a customer to purchase multiple products together as a single item or package at the point of sale, creating just one order from the start.
Do I need Shopify Plus to split or merge orders?
No. Order splitting is possible on all Shopify plans if you use multiple inventory locations. Order merging is not a native Shopify feature on any plan and requires a third-party app, which are generally available to all merchants.
How do I track a split shipment?
Each part of a split shipment will have its own unique tracking number. You and your customer can track each package individually through the carrier's website. The order status page in Shopify should display all associated tracking numbers.
Will merging orders mess up my tax reporting?
No, as long as it's done correctly. A proper merge cancels the duplicate order but does not refund it, so the total revenue and taxes collected remain accurate. The line items are simply consolidated under a single order ID for fulfillment.
Install on Shopify
