What is the difference between kitting and assembly?

Think of assembly as putting a product's parts together. Kitting is a different job. It means taking separate, finished items and packing them together. For example, a warehouse might assemble a product and include a charger and instruction booklet in one kit. The kit may have its own SKU for inventory tracking.

Can kitting increase average order value?

Bundling related products gives customers a reason to purchase more than one item at a time. For example, a skincare brand might offer a cleanser, moisturizer, and serum as a set. Whether that increases average order value depends on the bundle price and whether customers see value in buying the products together.

Worker checking eCommerce shipping boxes and order details during fulfillment

When Kitting & Custom Packaging for eCommerce Is Worth It (and How 3PLs Handle It)

Branded boxes and curated bundles can make your products feel more valuable, but they also add work to every order you ship. Someone has to assemble the kits, store the custom mailers, track each component, and pack every box the same way during your busiest week of the year. Before investing in custom packaging for eCommerce, you need a clear read on whether that extra effort will come back as larger orders, repeat customers, and fewer damaged shipments.

Below, we break down when kitting and custom packaging earn their cost, when they don’t, what drives the price, and how a fulfillment partner can take the work off your team’s plate.

What Is Kitting in eCommerce Fulfillment?

Kitting involves grouping separate products or components together before an order ships. An eCommerce business might sell the group as a single item, with its own SKU, even though the warehouse pulls several products to put it together.

Common examples include:

Product bundles
Starter kits
Subscription boxes
Promotional kits
Gift sets
Seasonal bundles
Multi-part products

Kitting can happen at two points in the process. With pre-kitting, kits are assembled in batches ahead of demand and stored as finished goods, ready to pick like any other SKU. With on-demand kitting, components stay on the shelf separately, and the kit is assembled once an order comes in. Most brands use a mix of both depending on volume. The step-by-step kitting process starts with planning the kit and assigning it a SKU, which matters for inventory tracking later on.

What Is Custom Packaging for eCommerce?

Custom packaging for eCommerce is packaging designed around your brand or product, rather than pulled from a generic stock box. It can be as simple as a printed mailer or as involved as a multi-piece presentation box.

It typically includes:

Branded shipping boxes or mailers
Inserts that keep products from shifting around
Tissue paper, stickers, or branded seals
Thank-you cards, product guides, or care instructions
Samples and discount cards for a future purchase
Boxes with extra padding for fragile items
Trays or compartments for products sold as a set

Packaging also needs to protect the order and make a good impression. A sturdy box with the right amount of cushioning helps prevent damage in transit. Branded details, on the other hand, influence how the order looks when the customer opens it. You can combine both, but each serves a different purpose. Shipping damage can tell you whether the packaging is doing its job, while customer feedback and repeat orders can offer clues about the unboxing experience.

A custom box isn’t always necessary to make an order feel special. A sticker on the mailer or a small card tucked in with the product may be enough. The box itself still needs to fit the item and keep it from getting damaged on the way to the customer. Otherwise, extra space and unnecessary packing materials can drive up shipping costs. Packaging inserts are worth considering if you want to add branded details without paying for custom boxes.

What Is the Difference Between Kitting and Custom Packaging?

Kitting changes what goes in the box. Custom packaging changes the box itself and how the contents are presented.

Kitting	Custom Packaging
Combines multiple products or components	Changes or customizes product presentation
Creates a bundle or kit	Creates a branded unboxing experience
Focuses on product configuration	Focuses on packaging and presentation
Can simplify future order fulfillment	Can improve brand presentation
Often involves additional warehouse labor	Can involve additional materials and packing steps

Many brands use both together. A subscription box is, by definition, a kit, and it almost always ships in custom packaging. A holiday gift set usually needs a printed box and a fitted insert to hold the kitted products in place.

When Is eCommerce Kitting Worth It?

Kitting tends to pay off when customers regularly buy certain products together or when your offer depends on a specific combination of items. These are the situations where it usually makes sense.

You Sell Product Bundles

Selling products together can encourage customers to add more to their carts. For example, a skincare brand might offer a cleanser, moisturizer, and sunscreen as one package. If that bundle sells regularly, the warehouse can assemble a batch ahead of time. Staff can then pull the finished kit when an order comes in instead of collecting each product separately.

You Offer Subscription Boxes

Subscription orders often include the same products month after month, making them a good fit for kitting. The warehouse has a set list of items to work from, so staff can assemble several boxes in one run and check each one against the required contents. If products change from one month to the next, you can update the packing list for the new shipment.

You Sell Seasonal or Promotional Products

Seasonal kits have a short sales shelf life. A holiday gift box might sell well in November and December, then barely move in January. Assembling these bundles ahead of time means the warehouse isn’t scrambling to put them together when orders pick up. Just be careful about how many you prepare. Leftover Valentine’s Day sets or back-to-school kits can be hard to sell once the occasion has passed.

You Want to Create a New Product Bundle Without Changing Individual SKUs

You may already have everything you need to put together a new bundle. Kitting lets you combine those existing products into a separate offering without replacing their individual SKUs. For example, a store that sells coffee makers, mugs, and bags of coffee could test a morning coffee bundle using its current inventory. If the bundle doesn’t sell well, the business can stop offering it without making major changes to its product catalog.

You Want to Reduce Picking Complexity

When several products are almost always ordered together, picking them one at a time can create extra work. Staff may have to visit different shelves for each item, then double-check that nothing was missed. Assembling the products into a kit ahead of time cuts out those repeated trips. This approach makes the most sense for bundles that sell consistently, since kits that sit in storage too long can take up valuable warehouse space.

When Is Custom Packaging Worth It?

Employees preparing eCommerce orders and packaging products for shipping

Custom packaging earns its cost when the box does real work for the brand, either by protecting the product or by shaping how customers feel about the purchase.

Your Brand Relies on Customer Experience

Customers may forget the shipping box, but they often remember how an order made them feel when they opened it. In a March 2026 Adobe Express survey of 703 online shoppers, 73% said premium packaging improved their opinion of a brand, and 57% said they purchased from that brand again because of the impression its packaging left. For brands that sell directly to consumers, those first few moments with a delivery can influence whether a customer orders again or shops elsewhere.

Your Products Need Additional Protection

Some products need a little more thought before they go into a shipping box. Glassware can bang together in transit, candle jars can crack, and electronics may get damaged if they slide around. Depending on what you’re shipping, you might need fitted inserts, dividers, or a snugger box to keep everything in place. If damaged items are becoming a regular problem, it’s worth looking at the packaging itself. Replacing products and shipping new orders adds up quickly.

You’re Selling Premium Products

Someone spending more on a product may notice when it arrives in a flimsy box with loose packing material. A rigid box, a fitted insert, or a clean, well-organized presentation can make the delivery feel more in line with the price they paid. The packaging doesn’t need to be elaborate, either. It just shouldn’t feel like an afterthought compared with what’s inside.

You Want to Differentiate Your Brand

Two businesses can sell similar products, but their packages don’t have to look alike. One might use a printed interior, another a personalized note, and another a distinctive color scheme that customers recognize when the box arrives. These details don’t always require a major packaging investment. Some of the subscription box packaging examples worth looking at use small touches, such as a printed card or an unexpected design inside the lid, to give an otherwise ordinary box more personality.

When Kitting and Custom Packaging May Not Be Worth the Cost

Not every product needs to be bundled or shipped in a custom box. If you sell low-cost items with thin margins, the extra assembly time and packaging materials could eat into your profit. Kits that rarely sell can also sit in storage and tie up inventory. Before making the switch, add up what it will cost to assemble, store, track, and ship these orders. A cheaper box doesn’t always mean a cheaper fulfillment process.

Your Products Are Rarely Purchased Together

Pre-kitting products that don’t actually sell together ties up inventory in finished kits that sit on the shelf. If your order data doesn’t show a consistent pattern, an on-demand bundle or a simple cross-sell may work better.

Packaging Materials Are Too Expensive

Custom packaging can cost more than expected once you start ordering it in bulk. Printed boxes and specialty inserts often require minimum order quantities, meaning you pay for a large supply before you know how well it will work for your business. The Adobe Express survey mentioned earlier found that small business owners often questioned the value of custom-printed boxes and branded tissue paper. If those materials don’t noticeably improve sales or customer retention, a simpler option may make more sense.

The Added Labor Doesn’t Support the Margin

Putting an order together takes time, especially when every package needs several extra steps. Workers may need to wrap each product, add an insert, arrange the contents, and seal the box before it’s ready to ship. That extra work can be hard to justify when you’re selling inexpensive products with little profit per order. Check how much assembly adds to the cost of each unit before making it part of your regular fulfillment process.

Your Order Volume Is Too Low to Justify the Process

A business shipping 20 orders a week has different packaging needs than one shipping 2,000. With fewer orders, the time spent setting up a kitting process and the money tied up in bulk packaging can be harder to recover. You may be better off starting with a branded card or sticker and revisiting custom packaging when order volume picks up.

The Packaging Doesn’t Improve the Customer Experience

Packaging only helps if customers notice and value it. Adobe Express found that 55% of consumers say packaging starts to feel gimmicky when it noticeably adds to the product’s cost. If your customers mostly care about price and delivery speed, elaborate packaging may not change how they feel about the order.

The Process Creates Inventory or Warehouse Complexity

Kitting adds more than a finished product to your inventory records. You also have to track the individual items in each kit and ensure you have enough stock to assemble them. Custom packaging brings another thing to manage. You could run out of printed boxes while the products are still in stock, or end up with piles of inserts after a rebrand. If your warehouse team is already struggling to keep inventory straight, adding these steps may create more problems than they’re worth.

How Much Does Kitting and Custom Packaging Cost?

There’s no single rate for kitting and custom packaging. A warehouse assembling a simple two-item bundle has different labor and material costs than one preparing a subscription box with a dozen products. If you’re using a third-party logistics provider (3PL), you may pay a fee for each kit or component handled, plus the cost of the packaging itself. The final price comes down to several parts of the process.

Number of Components

Putting two products in one box takes less work than assembling a subscription box with 10 items, a sample, and printed materials. Warehouse staff have more items to pick and place, and there’s more to check before the package is ready to ship. That extra handling can increase the cost of each kit.

Labor Requirements

The time it takes to put a kit together affects what you’ll pay. Two products going into a box is a fairly quick job. A kit that requires individually wrapped items, a specific layout, printed inserts, and a final inspection takes more hands-on work. If you’re shipping fragile goods or have strict presentation requirements, expect assembly to take longer.

Packaging Materials

The packaging itself can take a sizable bite out of the budget. Boxes, mailers, tissue paper, inserts, tape, and protective fillers all add to the cost of an order. In the Adobe Express survey mentioned earlier, subscription box businesses reported an average packaging spend of $8.20 per order, the highest among the product categories surveyed. Custom printing can also mean ordering large quantities upfront, leaving you to pay for materials well before you use them.

Order Volume

Pre-assembling kits makes more sense when you know they’ll sell. If a bundle moves quickly, having a batch ready to go saves the warehouse from putting together the same combination over and over. With a slow seller, though, those finished kits could sit around for months. It’s often easier to keep the products separate and assemble the bundle when an order comes through.

Storage Requirements

Where will everything go before it ships? You may need shelf space for the individual products, another area for assembled kits, and room for boxes and inserts. Rigid gift boxes are especially awkward to store because they take up space even when empty. If your 3PL bills for storage, ask how much room your packaging and finished kits will need before committing to a design.

Shipping Dimensions and Weight

At UPS Daily Rates, a 12 × 10 × 8-inch box is billed as 7 pounds even if there’s only a 1-pound candle inside. UPS charges for dimensional weight, meaning the space a box takes up, whenever it’s higher than the actual weight. Before ordering custom boxes in bulk, send your 3PL the dimensions and ask what each one will cost to ship.

How Do 3PLs Handle Kitting and Custom Packaging?

When you outsource kitting and custom packaging, the work follows a set sequence. Details vary by provider, but most 3PL kitting services run through these seven steps.

1. Inventory Is Received and Stored

The warehouse checks each delivery against the shipment records and sets aside anything that’s damaged or missing. The warehouse then stores products, boxes, and inserts until they’re needed. Staff record where each item is kept, so they don’t have to search the shelves when it’s time to put a kit together.

2. The Kitting Requirements Are Defined

Before the warehouse can assemble a kit, someone needs to decide what goes inside and how it should look. Write down the items and quantities, along with any small details, like wrapping one product separately or placing a card on top. Already have a kit put together? Send it to your 3PL. A physical example can be more useful than a page of instructions.

3. Components Are Picked

Warehouse staff pull the components for each kit, either in batches for pre-kitting or order by order for on-demand kitting.

4. Products Are Assembled Into Kits

Components are combined according to the kit spec. Pre-kitted products are assigned their own SKU so they can be picked as a single item later.

5. Custom Packaging Is Applied

The products are packed in the custom box or mailer, along with any extras you’ve chosen to include, such as a thank-you card, tissue paper, or a sample. How everything is packed depends on the kit and how you want customers to see it when they open the box.

6. Quality Control Is Performed

Before a kit ships, someone checks that all products are included, the package is assembled correctly, and the label is correct. It’s much easier to fix a packing mistake at the warehouse than to deal with a customer who received an incomplete order.

7. Finished Kits Are Stored or Shipped

Pre-kitted products go back into inventory as finished goods, ready for order fulfillment. On-demand kits ship as soon as they’re packed.

How Kitting Can Affect Inventory Management

Warehouse worker applying a shipping label to a package during order fulfillment

Kitting adds a layer to inventory management because every finished kit draws down several component SKUs at once. Keeping counts accurate depends on a handful of practices.

Tracking individual components so you always know how many kits you can still build
Managing finished kits as their own SKUs, separate from loose components
Avoiding stockouts of individual components, since one missing item can halt production of an entire kit
Managing seasonal kit inventory so leftover kits or components don’t sit unsold after the season ends
Maintaining accurate bills of materials whenever a kit’s contents change

A good warehouse management system ties all of this together, so selling one kit automatically adjusts the component counts behind it. That connected tracking is one of the bigger advantages of working with a 3PL that already runs this kind of system.

Kitting and Custom Packaging for Subscription Boxes

Subscription boxes put kitting and custom packaging on a recurring schedule. That repetition makes them efficient to fulfill once the process is set, but it also leaves little room for error, since every subscriber expects their box in the same window.

A few things set subscription kitting apart:

Boxes assembled on a regular schedule, such as the first week of each month
Different products packed for each subscription level
New samples, discount codes, or promotional cards added with each shipment
Holiday boxes may use different designs, colors, or packaging materials.
Order volume can jump when a new billing cycle comes around.
All products and boxes need to be on hand before packing day.
Staff checks each box for missing products or packing mistakes before it leaves the warehouse.

Brands that outsource subscription box fulfillment usually do it to keep these cycles on time without pulling their own team into a monthly assembly sprint.

Signs Your Business May Be Ready to Outsource Kitting

Handling kitting in-house can work well early on. These signs usually mean it’s time to bring in outside help.

Order volume is climbing faster than your team can pack
Your team spends hours each week assembling bundles instead of focusing on growth
Several products regularly sell together and would be faster to pre-kit
You’re launching a subscription box or a new line of product kits
Custom packaging steps are pulling employees away from customer service, marketing, or product work
Your space doesn’t have room for a dedicated kitting area
Order quality varies from one shipment to the next
Seasonal kits create labor spikes you have to staff around
You need to scale without hiring more warehouse staff
Packaging and kitting requirements have become hard to manage internally

You don’t have to wait for all these issues to hit at once. If assembling kits is slowing down order fulfillment or taking time away from other parts of the business, outsourcing may be worth considering. A third-party logistics provider (3PL) can handle the assembly, packaging, and inventory tracking while your team focuses on running the business.

How eWorld Fulfillment Can Help With Kitting and Custom Packaging

eWorld Fulfillment handles kitting and custom packaging fulfillment as part of its eCommerce fulfillment services, so bundles, branded boxes, and inserts move through the same process as the rest of your orders. The team can also help design boxes that reflect your brand and protect what’s inside.

Support covers:

Product bundles assembled and packed for shipping
Branded boxes and packaging made to fit your products
Order picking, packing, and shipping
Stock tracking for individual items and completed kits
Assembly for subscription boxes, seasonal offers, and promotions
Checks for missing items and packing errors
Fulfillment from warehouses in St. Petersburg, Dallas, Carlstadt, and Reno

Ready to Scale Your Kitting and Packaging Operations?

Keeping track of products, boxes, and assembly can get complicated as orders pick up. eWorld Fulfillment can help you work out the details, from what’s included in each kit to how orders are packed and shipped. Request a custom fulfillment quote to discuss your products, order volume, and packaging needs.

FAQs

The difference comes down to when the kit is assembled. With pre-kitting, warehouse staff put the items together ahead of time and store the finished kits until they’re ordered. With on-demand kitting, the items stay separate until a customer places an order. For example, a business selling phone accessories might keep chargers, cases, and cables in separate inventory and bundle them only when someone buys the kit. Pre-kitting can speed up packing for popular bundles, while on-demand kitting avoids filling storage space with kits that may not sell quickly.

A 3PL tracks packaging supplies, including boxes, mailers, and printed inserts, so the warehouse knows what’s available. As supplies are used, inventory levels change. Monitoring those numbers helps avoid having orders ready to ship with no packaging left. This matters most for printed materials, which can take weeks to reorder.

It can, particularly when a bundle sells regularly. Instead of picking several separate items for every order, warehouse staff can pick one finished kit. However, you need to factor in the cost of assembling and storing those kits. The savings depend on how often the kits sell and how much work goes into building them.

Yes, some third-party logistics providers offer custom packaging services. Depending on the provider, that may mean packing orders in boxes you supply or helping develop packaging that fits your brand. eWorld Fulfillment works with brands to design packaging that represents their business and protects products during shipping.

Start by measuring the product and considering how easily it could be damaged in transit. Choose a box or mailer that fits without leaving too much empty space, then decide whether you need inserts or other protective materials. Add your branding through printed packaging, tissue paper, or cards. Before placing a large order, test a sample by shipping it to see how it holds up and check whether the package size will affect shipping charges.

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