Kitting is the process of assembling individual items into a single unit before dispatch. A hardware supplier might kit a router, power cable, installation guide, and warranty card into one box. A food brand might bundle three products into a gift set with branded tissue paper and a printed card. A technology company might assemble trial packs with product samples and promotional material.

Co-packing is closely related — typically the combining of two or more finished products into a single consumer unit, often with its own barcode and retail packaging. The two terms are used interchangeably in many warehousing contexts, though co-packing sometimes implies more substantial packaging work.

What both have in common is that they happen after goods arrive at the warehouse but before they leave for the customer. That positioning is the key commercial variable. It keeps your inventory flexible for as long as possible, and it puts the assembly work where it can be done most efficiently.

Many Irish businesses that kit products do it in-house — either in their own warehouse or at a production facility before goods move to their 3PL. This works when volumes are modest and consistent. It becomes harder to justify when kitting requirements are seasonal, when the product mix changes frequently, or when the activity competes for space and staff time with core operations.

The direct costs of in-house kitting are usually visible: the labour hours, the materials, the floor space. The indirect costs are less so. Staff diverted from higher-value work, assembly errors that create returns and replacements, and the fixed capacity you carry year-round to handle a peak that only materialises for six to eight weeks before Christmas — these rarely appear in a straightforward cost comparison but they are real.

A 3PL that handles kitting at point of dispatch removes the fixed cost element. You pay per kit assembled, which scales with actual order volume. There is no dedicated team sitting idle in February.

Seasonal demand spikes are the clearest case. If you sell gift sets in October, November, and December, and those sets are assembled from components you also sell individually throughout the year, in-warehouse kitting handles both SKUs from a single inventory pool. Components are held as individual units and kitted on demand rather than pre-assembled into a gift set that may not sell through and requires dismantling in January.

Frequent product or bundle changes also favour 3PL kitting. If your bundle composition shifts each quarter — new products in, updated inserts, different promotional materials — reconfiguring a kitting operation in your own facility carries a friction cost each time. A 3PL with the right systems can update kit specifications quickly without disrupting standard fulfilment.

High-volume B2B kitting is a third scenario worth considering. Technology businesses shipping hardware kits to enterprise clients, ISPs sending CPE boxes with accessories and documentation, or companies assembling sample packs for trade events all need accurate, consistent kit assembly at volume. A warehouse with quality control built into the kitting workflow reduces error rates and the cost of remediation when kits arrive incomplete at the customer.

Before assuming your logistics partner can handle kitting, it is worth checking a few things directly. Does their warehouse management system track kit components as separate inventory items, giving you accurate stock visibility across both individual and bundled SKUs? Is there a quality control step in the kitting process — a check for completeness before a kit is sealed? And how is it priced — per finished kit, per component handled, or as a flat rate?

Pricing transparency matters here because the economics only work if you can model them properly. A per-kit rate is straightforward to compare against your current in-house cost. A vague “we can look after that” response from a 3PL, without a clear rate card, is a sign that kitting is an occasional favour rather than a real service line.

Kitting and co-packing will not make commercial sense for every Irish business. But for those with seasonal bundling needs, variable product mixes, or B2B customers who expect consistent, accurately assembled shipments, it is worth running the numbers against what you currently spend doing it yourself.