Your injection molded parts are solid, but your margins aren't moving. Adding custom packaging design and production to your service lineup can unlock 15–30% additional revenue per order without requiring major capital investment. Most molding shops leave this money on the table.
Why Packaging is Your Blind Spot
Injection molding customers—from automotive suppliers to consumer goods manufacturers—need finished, shelf-ready products. Right now, they're sourcing packaging separately, which means longer lead times, higher per-unit costs, and fragmented relationships. You already understand their part specifications and production timelines. Packaging is the natural upsell.
The best part: you don't need to own or operate packaging equipment. Co-molding partnerships, contract relationships with local box and film suppliers, and white-label print vendors let you offer custom packaging without major CapEx.
What Custom Packaging Means for Molded Parts
Custom packaging in this context typically includes:
- Printed or branded boxes matching your client's product dimensions (starting around $0.35–$0.75 per unit at volumes of 5,000–10,000)
- Foam or thermoformed inserts protecting parts during shipping ($0.15–$0.50 per insert)
- Branded tape, labels, or tissue paper ($0.05–$0.20 per piece)
- Co-molded components like custom caps, hinges, or closures produced on your own equipment
The sweet spot for most shops: start with printed boxes and foam inserts, then expand to co-molded accessories as demand grows.
How to Price and Margin It
Your margin structure should reflect the minimal risk and effort:
- Packaging material cost: 40–55% of the selling price
- Setup, design proofing, and fulfillment: 10–20% of the selling price
- Your gross profit: 25–50%
For example: a client orders 10,000 injection molded electronic enclosures at $2.50 per unit. They also want custom printed boxes with foam inserts. You source the boxes at $0.40 each and foam at $0.15 each. Sell them the packaging package at $1.00 per unit. Your cost is $0.55, leaving you $0.45 per unit—that's $4,500 additional revenue on one order.
Most clients will happily pay this because they avoid dealing with multiple vendors.
Getting Started: A Three-Step Approach
Step 1: Audit Your Current Customers
Review your last 20 orders. Which products are small, high-value, or B2C-bound? Those are your best candidates. Medical devices, electronics, fasteners, and consumer products almost always need custom packaging. Reach out to three existing customers: "We're now offering coordinated packaging. Interested?"
Step 2: Establish Supplier Relationships
Don't try to do everything in-house. Contact 2–3 local packaging converters or print-on-demand vendors. Get sample quotes for small runs (1,000–5,000 units). Negotiate net-30 terms if possible. Many will work with you on design files and fast turnarounds (7–14 days for boxes, 3–5 days for labels).
Step 3: Create a Simple Packaging Menu
Build a one-page PDF showing packaging options with rough pricing. Include:
- Standard printed cardboard boxes (24–48 hour turnaround)
- Custom foam inserts (48–72 hours)
- Branded tape and labels (24 hours)
- Co-molded closures or clips (your standard lead time)
Share this with your sales team and existing customers immediately.
Competitive Advantages You Already Have
Your customers trust you to deliver parts on time and to spec. Packaging consistency matters just as much. When you handle both, you eliminate handoff delays and ensure unboxing quality. You also control the brand story—from part to package.
This positions you as a one-stop solution, which is especially valuable for smaller manufacturers who don't have procurement bandwidth for multiple vendors.
Where to Grow the Pipeline
Once you're comfortable offering packaging, make it visible. Update your website service pages, case studies, and technical specs to mention "custom packaging integration." If you're looking to attract more customers actively searching for turnkey solutions, listing your expanded service offering on Mercoly—where manufacturers compare molding and packaging providers—helps you get found, win leads, and sell both products and services in one place.
Frequently Asked Questions
Q: Do I need to stock packaging inventory myself? No. Use just-in-time ordering from suppliers so they build packaging only when your customer places an order. This minimizes your working capital and storage costs.
Q: What's the typical timeline from design to delivered packaged parts? Design and approval take 3–5 days, packaging production 5–14 days depending on complexity, and assembly/fulfillment 2–5 days—total 10–24 days, which fits most lead times.
Q: Can I mark up packaging significantly if the customer doesn't know my supplier cost? Yes, but price fairly. Customers talk, and if you're 40–50% above market rate, they'll find out and source elsewhere, killing repeat orders.
Start conversations with your top five customers this week about their packaging frustrations.