When you outsource your packaging and warehousing to a co-packer, you're trading operational headaches for what should be cost savings—except those savings vanish fast if you don't understand what you're actually paying for. Most companies discover hidden fees only after signing a contract, and by then, renegotiating is expensive and awkward. This guide breaks down the real costs lurking in co-packing agreements so you can negotiate smarter.
The Setup Fees Nobody Talks About
Co-packers charge heavily for the privilege of getting started. Most will hit you with setup or onboarding fees ranging from $500 to $5,000, depending on product complexity and line changeover requirements. If your product requires custom labeling, shrink-wrapping, or specific box inserts, expect setup costs to climb toward the higher end.
Beyond the obvious setup charge, you'll often pay for mold creation, fixture building, or line configuration. A custom display box design might sound like a one-time cost, but if you need tweaks later, you're paying again. Always ask upfront: what's included in setup, and what triggers additional charges?
Storage Fees That Grow Every Month
This is where co-packers make recurring money. Storage fees typically run $0.50 to $2.00 per pallet per day, depending on climate control needs, inventory density, and location. That sounds cheap until you realize a modest 100-unit inventory might occupy 10–15 pallets, costing you $50 to $300 monthly just to exist in their warehouse.
Watch for these hidden storage variations:
- Minimum storage commitments: Many contracts require you to keep a baseline inventory or pay for it anyway
- Overstock penalties: If your inventory exceeds forecasted levels, per-pallet rates jump 25–50%
- Climate-controlled surcharges: Refrigerated or humidity-controlled storage costs 2–4× standard rates
- Slow-moving inventory fees: Some packers charge extra for SKUs below a monthly movement threshold
- Receiving and put-away labor: Often billed separately at $40–$75 per hour
Before signing, request a storage cost projection based on realistic inventory levels for a full year, not just the first month.
Handling and Fulfillment Charges
Co-packers charge per unit touched, and they touch your products a lot. Typical handling fees range from $0.10 to $0.50 per unit for pick, pack, and label operations. Throw in shipping label printing ($0.05–$0.15 per unit), box sealing ($0.03–$0.10), and quality checks, and a simple order quickly balloons.
If you're shipping multiple units per order, consolidation and freight optimization might cost extra ($25–$150 per shipment, depending on volume and carrier). Rush orders or expedited shipping coordination typically add 20–40% to standard labor costs.
Material and Packaging Markups
Co-packers don't just package your product—they supply materials and mark them up. Boxes, cushioning, tape, labels, and inserts typically carry 20–50% markups over the packer's actual material cost. You can negotiate this, but only if you request a materials breakdown during the quote phase.
Ask for:
- Itemized costs for each packaging material
- The option to supply certain materials yourself (though many packers discourage this)
- Bulk-buy discounts if you commit to higher volumes
Some packers will also charge restocking fees if you return unused materials or change specifications mid-contract.
Minimum Order Quantities and Volume Tiers
Most co-packers enforce minimum order quantities (MOQs) between 500 and 5,000 units, depending on product type. If you fall short, you'll pay a non-compliance fee or overage charges. Similarly, if your volume drops below forecasted levels, some contracts allow the packer to increase per-unit labor rates by 15–30%.
Negotiate tiered pricing upfront: clarify what volumes trigger discounts and what penalties apply if you undershoot.
Avoid Surprises: What to Request Before Signing
Ask your potential co-packer for a fully itemized cost model that includes storage, labor, materials, handling, and compliance fees. Request a 12-month cost projection with realistic volume assumptions, and always get clauses that allow rate reviews annually. Check whether contract termination includes early exit penalties or inventory liquidation fees.
Platforms like Mercoly let you compare and evaluate multiple co-packing providers side by side, making it easier to spot which facilities offer transparent pricing and which bury fees in fine print.
Frequently Asked Questions
Q: Can I negotiate storage fees after signing a contract? Most co-packers allow annual rate reviews, but renegotiating mid-term is difficult unless volume changes dramatically; lock in favorable rates upfront or build review clauses into your agreement.
Q: What's the difference between handling fees and fulfillment fees? Handling fees typically cover warehouse labor (receiving, stocking, picking), while fulfillment fees include packing, labeling, and box sealing; ask your packer to itemize each separately so you understand what you're paying for.
Q: Should I supply my own packaging materials to save money? Rarely worth it—most co-packers charge slotting fees or labor premiums that offset savings, and it complicates quality control and consistency.
Compare transparent co-packing quotes on Mercoly to avoid locking into overpriced agreements.