Your best customers buy the same three products together. Packing them one by one on every order costs time and causes mistakes.
There’s a better way. Kitting and bundling let you turn those repeat combinations into a single product: one offer in your store, and one ready-to-ship unit in the warehouse. Done well, they raise order value and cut packing time at once.
This guide explains what kitting and bundling are, how they differ, and what they cost, with a worked profit example. You’ll also find Amazon’s bundle rules, examples by business type, and a six-step plan for setting up your own program.
Key Takeaways
- Kitting means packing several items into one ready-to-ship unit before orders arrive.
- Bundling means selling several products together as one offer.
- Kitting is an operations decision; bundling is a sales decision. Many brands use both.
Table of contents
- What is kitting?
- What is bundling?
- Kitting vs bundling: the key differences
- Benefits of kitting and bundling for ecommerce brands
- Kitting and bundling examples by business type
- How much do kitting and bundling cost?
- How to set up a kitting and bundling program
- Common kitting and bundling mistakes
- In-house kitting vs outsourcing to a 3PL
- FAQ – Kitting and bundling
- Conclusion
What is kitting?
Kitting is the process of grouping several separate items into one ready-to-ship unit, called a kit, usually before orders come in. Each kit gets its own SKU, so it can be stored, picked and shipped as a single product. Many brands hand this work to a 3PL that offers kitting, bundling and assembly alongside fulfillment.
How kitting works in a warehouse
- Components arrive. The warehouse receives each item as its own SKU and checks it in.
- A kit SKU is created. The warehouse system links the kit to its components in a “bill of materials,” so stock levels update automatically. Warehouse management systems keep kit and component stock in sync: building one kit takes its parts out of stock straight away.
- Kits are assembled and checked. Staff pack the items, add inserts, seal and label the kit, then run a quality check.
- Kits are stored and shipped. When an order comes in, the kit is picked as one item, which is faster and leaves less room for error.
Pre-kitting vs on-demand kitting
Pre-kitting means building kits in batches ahead of time. It’s best for steady sellers and peak season, when speed matters most.
On-demand kitting means building each kit only when an order arrives. It’s best for new or slow products and kits with many variations, because no stock is tied up in finished kits.
What is bundling?
Bundling is a sales strategy: you sell several products together as one offer, often for less than buying them separately. Here are the four types of product bundling ecommerce brands use most.
Types of product bundles
- Pure bundles: items sold only as a set, such as a three-step skincare routine.
- Mixed bundles: items sold alone or together at a discount, such as “buy all three and save 15%.”
- Multipacks: several units of the same product, such as a 3-pack of socks.
- Gift sets and seasonal bundles: sets built around holidays or occasions, such as a holiday candle trio.
Virtual vs physical bundles
Virtual bundle: your store sells the bundle as one product, but the warehouse picks the separate items for each order. With Shopify / Woo fulfillment, bundles set up in your store sync to the warehouse, so the right components are picked.
Physical bundle: the items are packed together in advance. At that point, the bundle has become a kit.
Kitting vs bundling: the key differences
People often use the two terms as if they mean the same thing, but kitting vs bundling really comes down to operations vs sales. The table below sets them side by side with light assembly, which is often confused with both.
Purpose. Kitting saves time and prevents errors in the warehouse. Bundling raises order value and moves more stock.
Timing. Kitting usually happens before the order, when kits are built in batches. Bundling happens at checkout, when the customer chooses the offer.
Inventory. A kit becomes its own SKU, built from component SKUs. A bundle can stay as separate SKUs that are picked together for each order. That’s why a kit needs its own stock count, while a bundle can be put together from whatever components are on the shelf.
The two work best together: you decide on a bundle for sales reasons, then kit it so it ships faster.
Kitting vs bundling vs light assembly at a glance
| Criteria | Kitting | Bundling | Light assembly |
|---|---|---|---|
| What it is | Separate items packed together into one ready-to-ship unit | Several products sold together as one offer | Putting parts together into a finished product |
| When it’s done | Before orders arrive (pre-kitting) or per order | At checkout; packed per order or pre-packed | Before the product is stored or sold |
| Inventory | One new kit SKU built from component SKUs | Can stay as separate SKUs | Components become one finished SKU |
| Typical examples | Subscription boxes, starter kits, PR and influencer kits | “Buy 3, save 10%”, gift sets, Amazon multipacks | Attaching parts, adding inserts or batteries |
| Main goal | Faster, more accurate fulfillment | Higher order value and sell-through | A product that’s ready to use |
Benefits of kitting and bundling for ecommerce brands
Kitting and bundling pay off in the warehouse, at checkout and on your customer’s doorstep. Here are six benefits worth knowing.
- Faster fulfillment. One pick instead of three or four per order. A three-product kit ships with a single pick, which speeds up pick and pack fulfillment when order volume spikes. It also frees up staff for the orders that can’t be kitted.
- Fewer packing errors. Items are checked once when the kit is built, not again on every order. That means fewer wrong or missing items reaching customers, and fewer returns to process, which protects your reviews too.
- Higher average order value. Bundles encourage customers to buy more in one go. A shopper who came for one product leaves with the full set, and you earn more from the same visit.
- Lower shipping and packaging costs. One box instead of several, often with a lower dimensional weight. Three items in one snug box usually cost less to ship than three separate parcels. It also saves on boxes, tape and void fill.
- Better unboxing experience. A kit can include branded packaging, inserts and thank-you cards that make the order feel considered. That’s hard to do when items are packed separately on the fly.
- Moving slow stock. Pair a slow seller with a bestseller to clear inventory without deep discounts. For example, add a slow-moving accessory to your most popular product and sell the pair as a value set, priced below the two items bought separately.
Kitting and bundling examples by business type
Every business kits for different reasons. Here’s what kitting and bundling look like in four common setups, and what makes each one work. These are illustrative examples, not real brands.
Subscription boxes
Example: a monthly coffee box with two 12 oz bags, a recipe card and a branded sleeve, built for 500 subscribers.
What matters: building hundreds of identical boxes on a fixed date. Every component must arrive on time, or the whole shipment slips. A subscription box fulfillment partner plans component deliveries around your ship date.
Amazon bundles and multipacks
Example: a 3-pack of phone cases sold as one listing on Amazon.
What matters: Amazon bundle prep. Amazon wants sets sealed together with a “Sold as set, do not separate” label and one scannable barcode, the FNSKU, on the outside, with the inner barcodes covered. Since January 1, 2026, Amazon no longer preps or labels FBA inventory in the US store, so bundles must arrive ready to sell. Amazon FBA prep and FNSKU labeling services can handle this for you. Prep rules change, so always check Amazon’s current requirements before you ship.
Crowdfunding rewards
Example: a campaign with three reward tiers, where each tier is a different kit, shipped to 2,000 backers.
What matters: many kit versions shipped in one large wave. Each backer must get the right tier, so clear kit SKUs and checks matter even more. A crowdfunding fulfillment partner can kit and ship every tier in one coordinated wave.
Gift sets, PR and influencer kits
Example: a holiday gift set of three scented candles in a branded box, built for 300 orders, or a launch kit with a new product, samples and a personal note, sent to 200 creators.
What matters: presentation, inserts and personal notes. A kit like this is often the first time someone sees your brand, so the unboxing has to feel right. Plan these runs well ahead, because personal notes take time to write and pack.
How much do kitting and bundling cost?
Your kitting cost comes down to three things: the labor to build each kit, the materials it ships in, and the space it takes up while it waits.
What you pay for
- Assembly labor: usually a fee per kit plus a small fee per extra item. ASTORAGEHUB, for example, lists bundling at $1.00 for the first item plus $0.20 for each additional item on its pricing page, so a three-item bundle costs $1.40.
- Packaging materials: boxes, inserts, shrink wrap and labels.
- Storage: both the components and the finished kits take up space until they ship. Pre-kitting large batches ties up more space than on-demand kitting, so match batch sizes to how fast the kit sells.
Is your bundle profitable? A worked example
Setup: three products that sell for $20, $15 and $10 ($45 in total), with a combined product cost of $18.
- Bundle price: $39, about 13% off buying them separately
- Kitting: $1.00 + 2 × $0.20 = $1.40
- Packaging: $0.80 (illustrative)
- Gross margin: $39 − $18 − $1.40 − $0.80 = $18.80
Result: $18.80 gross margin per bundle, and one shipment instead of up to three.
The $6 discount isn’t free. Sold separately, the same three products would bring in $27 before fulfillment costs. The bundle pays when what it saves and what it adds outweigh that discount: one pick and one shipping label instead of three, plus sales from customers who wouldn’t have bought all three on their own. If they don’t, shrink the discount. Our pricing page lists current bundling rates and a bundle profit calculator for testing different prices.
How to set up a kitting and bundling program
Six steps take you from an idea to kits shipping reliably, and each one comes with a quick tip.
- Pick the right products. Look at your order data for items customers already buy together. Your store’s sales reports or order exports will show the most common pairs. Tip: start with your top three combinations, not your whole catalog.
- Define the kit. List every component, quantity, insert and packaging item, and give the kit its own SKU. Tip: use store and warehouse integrations so the kit SKU syncs with your store.
- Design the packaging. Choose a box that fits the kit snugly, so you don’t pay to store or ship empty space. Tip: a snug box lowers shipping costs, and so does shipping from closer to your customers; see Lower Shipping Costs with a West Coast Hub.
- Forecast and set reorder points. A kit can’t be built if one component runs out, so track each component separately. Tip: set a reorder point for every component, not just for the finished kit.
- Write clear instructions and quality checks. Photos of a finished kit help the warehouse build it right every time. Tip: if the kit has layers or inserts, include a photo of each layer.
- Test a small batch. Build and ship a few kits before a full run, then adjust. Fix any gaps in the instructions before you scale up. Tip: ship a few to your own team and check how they arrive.
Need Help With Kitting and Bundling?
ASTORAGEHUB provides kitting, bundling and fulfillment services for ecommerce and B2B businesses.
Common kitting and bundling mistakes
Most kitting problems come from a handful of avoidable mistakes.
- Running out of one component. The whole kit stops, even if every other part is in stock. Track components, not just kits, and reorder each one on its own schedule.
- Too many kit versions. Every variation adds complexity and slows the warehouse down. Keep only the versions that actually sell.
- Ignoring weight and box size. A heavier or bigger kit can move into a more expensive shipping tier. Weigh and measure a finished kit before you set its price.
- Discounting too much. The bundle sells, but loses money on every order. Run the margin math first, including kitting and packaging costs.
- Skipping quality checks. One wrong item means a return and an unhappy customer, and handling it through returns processing takes far longer than the check would have. Check every kit, or at least a sample from every batch.
In-house kitting vs outsourcing to a 3PL
You can build kits yourself or hand the work to a 3PL. Both can work; the right choice depends on your volume and how much time kitting takes from the rest of the business. In-house kitting suits small volumes and products that change often. A 3PL suits steady volume and seasonal peaks.
| In-house kitting | 3PL kitting services |
|---|---|
| Full control and quick changes | Trained staff, kitting stations and storage in one place |
| Needs your own space, staff and supplies | Kits ship from the same building as your orders |
| Hard to scale for peaks | Extra hands for peaks without hiring |
| You see every kit before it ships | Less direct control, so clear instructions matter |
When to outsource. It’s time to look at an ecommerce fulfillment partner when your volume is growing, peaks are hard to staff, or kitting takes time away from running the business. See How We Work to learn how ASTORAGEHUB works with brands.
FAQ – Kitting and bundling
Kitting packs several items into one ready-to-ship unit, usually before orders arrive; bundling sells several items together as one offer. Kitting is an operations decision that speeds up the warehouse, while bundling is a sales decision that raises order value. Many brands bundle products for sales, then kit them so they ship faster.
No. Kitting keeps each item as it is and packs them together, while assembly joins parts into a new, finished product. A starter kit with a bottle, brush and cloth is kitting; attaching legs to a table before it ships is assembly. Many 3PLs offer both services.
Usually, yes. A kit SKU lets your store, warehouse and inventory system track kits and orders correctly. The warehouse links the kit SKU to its component SKUs, so building one kit automatically takes its parts out of stock and keeps both counts accurate.
Seal the items together, add a “Sold as set, do not separate” label, and put one FNSKU barcode on the outside with the inner barcodes covered. Since January 1, 2026, Amazon no longer preps inventory for US sellers, so bundles must arrive ready to sell. Always check Amazon’s current prep rules.
Often, yes, because one package replaces several. Three items in one right-sized box usually cost less to ship than three separate parcels, and you pay for one label and one pick instead of three. Check the kit’s weight and size, though, as a bigger box can move into a higher shipping tier.
Yes. Most 3PLs offer kitting, usually charged per kit, using your instructions, components and packaging. ASTORAGEHUB, for example, lists bundling at $1.00 for the first item plus $0.20 for each additional item. Send clear specs and photos so every kit is built the same way.
Conclusion
Bundling decides what you sell together; kitting decides how it gets packed. Used together, they let you raise order value and ship faster at the same time. Start small: pick one bundle your customers already buy, check that the numbers work after kitting and packaging costs, and test a short run before you scale. Once a kit sells, track every component so one missing item never stops a whole product line.
Need Help With Kitting and Bundling?
ASTORAGEHUB provides kitting, bundling and fulfillment services for ecommerce and B2B businesses.
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