Bundle & Kit Inventory Management

The Problem With Bundles

Bundles print money until they break your inventory. I ran a three-product skincare kit that boosted AOV by 40%. Then a customer ordered the kit, one component had sold out through individual sales an hour earlier, and I had to cancel the order. That was a Thursday. By Monday it had happened four more times.

The root issue: most inventory systems track the bundle as a single SKU. They don't subtract component stock when individual items sell. Your kit shows 50 available, but if one component has 12 units left, you can actually fulfill 12. The other 38 are phantom inventory.

Shopify's native bundles app doesn't solve this. Amazon treats bundles as a separate ASIN with its own inventory count. Neither platform does the math you actually need: given the stock of every component across every location, how many complete kits can I ship right now?

Who This Is For

Sellers running product bundles, kits, variety packs, or gift sets on Shopify or Amazon. You have components that appear in multiple bundles and individual listings. You are tired of manually checking whether you can actually fulfill what your storefront says is in stock.

If you sell more than 5 kits, or if any two kits share a component, the spreadsheet version of this problem gets ugly fast. We built this so you don't have to maintain it yourself.

How Kit Management Works

Create Kits From Your Existing Catalog

Pick any item in your catalog. Convert it to a kit. Map each component and specify how many units go into one kit. A "Morning Routine Set" might need 1x cleanser, 1x moisturizer, and 2x sample sachets. The mapping takes about 30 seconds per kit.

Kits start in Draft status. Nothing changes in your live inventory until you mark them active.

Virtual Availability, Real Numbers

Here is the calculation that matters. Say your kit has three components:

Component	On Hand	Qty Per Kit	Kits Supported
Cleanser	120	1	120
Moisturizer	45	1	45
Sample Sachet	80	2	40

Your kit availability is 40. Not 120. Not 45. The sample sachet is the bottleneck, and ReplenishRadar flags it as the limiting component. That one number tells you where to focus your next purchase order.

This calculation runs across all locations. If you stock components in three warehouses, the system pulls from total available inventory, not just one location.

Kit Statuses at a Glance

Every kit gets a status based on its component health:

Status	What It Means
Fulfillable	All components in stock. You can ship.
Low Stock	At least one component is running low. Reorder soon.
Unfulfillable	One or more components are at zero. You cannot ship this kit.
Draft	Kit defined but not yet active.

The KPI strip at the top of the kit list shows these counts across your entire kit catalog. I check it once a day. If Unfulfillable is anything other than zero, that is the first thing I fix.

Find the Bottleneck, Fix It

Every kit view shows the limiting component. Click through to that component's inventory detail to see stock by location, open purchase orders, and expected delivery dates. No hunting through spreadsheets to figure out which item is holding up the kit.

This is where kit management connects to the rest of ReplenishRadar. Your demand forecast covers component-level demand. Your purchase orders restock the bottleneck. Your transfer suggestions move stock where it needs to be. The kit view just tells you where to look first.

What You Can Do in the Kit List

Search and filter by status. If you have 40 kits and need to find the ones that can't ship, filter to Unfulfillable and you have your answer in two seconds. Sort by availability to see which kits are closest to running out.

Need to stop selling a bundle? Unconvert the kit back to a regular item. The component mappings are removed but all your inventory data stays intact. No data loss, no side effects.

Pricing

Kit management is available on Growth plans and above.

Plan	Price	Kits	SKUs	Stores
Standard	$99/mo	Not included	2,000	2
Growth	$199/mo	Included	20,000	5
Scale	$499/mo	Included	50,000	10
Enterprise	Custom	Included	Unlimited	Unlimited

If you are on Standard and need kits, the Growth plan also adds FBA Intelligence, Catalog Triage, and vendor workflows. For most sellers running bundles across two or more channels, Growth pays for itself the first time it catches a phantom inventory situation before a customer does.

Start a 14-day free trial on the Growth plan and set up your first kit in under a minute.

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Related:

• Shopify Bundles and the Inventory Problem - Component-level tracking deep dive
• Demand Forecasting - Forecast at the component level, not the bundle level
• Purchase Orders - Restock bottleneck components before kits go unfulfillable
• Unified Inventory Dashboard - See components across all locations