Variable 1 — Run size (the biggest lever)
Run size moves unit cost more than any other variable on custom packaging. The reason: most packaging costs are setup costs, not material costs. A printing press has to be cleaned, calibrated, plated (or its digital queue loaded), color-matched, and run-up before a single sellable unit comes off — usually 30-90 minutes of press time at meaningful hourly cost. Spread that setup over 500 cartons vs 50,000 cartons and the per-unit setup cost drops by orders of magnitude.
Same math for cutting, gluing, and finishing. Each step has a setup cost. A small-run carton vs a high-volume run isn't 7× cheaper on materials — materials only get marginally cheaper. The setup amortization does the work.
Tactical takeaway: get one big quote at a few quantity break points. If your annual volume is 12,000 units, don't order 1,000 every month — order 6,000 twice. Setup gets amortized over more pieces, your shelf life lets you hold the inventory, and your unit cost drops meaningfully on the same SKU. Start a Quote for live pricing — the configurator shows volume breaks as you adjust qty.
The biggest free lever on packaging cost is ordering bigger runs less often. Doubling the order quantity usually cuts unit cost meaningfully on custom cartons.
