What Questions Should You Be Asking When Choosing a Co-packer?

Picking the wrong co-packer can end a brand. Product recalls, missed ship windows, quality slippage, capacity you can't grow into — every one of those problems traces back to a question that didn't get asked during evaluation. Most founders come to us at ePackageSupply already on their second or third co-packer because the first one felt great on the sales call and fell apart in production.

There's a pattern. Co-packers that blow up later almost always fail the same handful of questions early — you just need to know which questions, and when to ask them.

The Four Phases of Co-packer Selection

1. Screening — Does this co-packer even belong on your shortlist? Fifteen minutes on the phone.
2. Due Diligence — Can they actually do what they say? On-site visit, reference calls, document review.
3. Contracting — What are the commercial and legal terms? Pricing, MOQs, exclusivity, termination.
4. Ongoing — How do you run the business together? QA, forecasting, dispute resolution.

Asking the wrong question at the wrong stage wastes everyone's time. A co-packer that aces screening can still fail due diligence. A great operational fit can still offer contract terms that bury you.

Phase 1 — Screening (The First 15 Minutes)

These questions qualify or disqualify a co-packer before you invest more time. If the answers don't fit, stop. Don't schedule a tour, don't send a sample.

Category and Format Fit

• What product categories do you actively run today? (Not "can run" — actively run.) Cold-fill beverage, hot-fill sauce, dry-blend powder, RTD in PET, liquids in glass, stick packs, tubs, pouches.
• What fill sizes and container types do you support? If you need a 5-gallon bucket SKU and they only run retail PET, you're done.
• Do you have the specific equipment my product needs? No homogenizer, no emulsion. No aseptic fill, no shelf-stable beverage.
• What categories do you refuse to run? A co-packer running dairy and allergen-heavy products on the same lines without dedicated changeover is a recall waiting to happen.

Minimum Order Quantity

• What's your minimum run — in units, cases, and production hours? All three matter. "10,000 units" means something different on a 30-minute run than on an 8-hour one.
• Is there a separate minimum for ingredients? A full drum or pallet of each raw material sets its own floor on economics.
• Do you offer a trial or first-run discount? The good ones know founders need to test before committing a year of volume.

Capacity and Timing

• What's your current lead time from PO to shipment? Be specific: ingredients locked, run scheduled, cases palletized, BOL issued.
• How booked are you right now? "Six months out" and "three weeks" tell very different stories.
• What's your capacity ceiling if I 10x in 18 months? This question kills more relationships than any other — founders outgrow their co-packer mid-growth.
• Do you have multiple lines that could run my product? A single-line co-packer is a single point of failure.

Phase 2 — Due Diligence (Before You Commit)

If a co-packer survives screening, you earn the right to ask harder questions. Ask these in person, on a tour, with a notepad.

Food Safety and Certifications

• What's your current food safety certification, and when does it expire? What you want: SQF Level 2+, BRCGS, FSSC 22000, or another GFSI-benchmarked scheme. Below GFSI and retail buyers (Walmart, Costco, Kroger, Sysco, US Foods) will refuse your product.
• Can I see your most recent audit report, including non-conformances and corrective actions? A co-packer that won't share redacted findings is hiding something. A co-packer with zero findings is probably hiding different things — real plants get real findings and correct them.
• How do you handle allergen control? Dedicated lines, validated changeover procedures, or shared equipment with cleaning validation? Get it in writing.
• What's your recall record? Every co-packer over a certain size has had one. You want to hear the process, the root cause, and what changed afterward. Evasion is a disqualifier.
• Are you FDA-registered and FSMA compliant, with a written Food Safety Plan and HACCP plan for my category? Non-optional.

Quality Control

• What in-line QC checks run during production? pH, brix, viscosity, fill weight, torque, seal integrity, metal detection, X-ray, vision systems — which apply to my product and which do you actually run?
• What's your protocol when a batch fails? Rework, discard, hold-and-test? Who pays?
• How do you handle retention samples? Stored at what temperature, for how long, available on request?
• What's your COA turnaround? Retailers will demand Certificates of Analysis on ship dates. Two-week turnaround costs you shelf space.

Sourcing and Inventory

• Do you source raw materials, or do I? Both models work, but they have different economics, lead times, and liability.
• If you source, show me your Approved Supplier List for my key ingredients. This is the program SQF Edition 10 puts under heavier audit weight — and the first thing a smart retailer asks about.
• How do you handle ingredient shortages or substitutions? You want: they call before swapping. Red flag: "We use an equivalent per our spec."
• What's my inventory visibility? Real-time, weekly, monthly, or none?

Facility and Operations

• Can I tour the plant — and can I bring my own food safety consultant? A refusal on either tells you everything.
• Show me where my product would actually be made. Specific line, specific room, specific changeover window. "Somewhere on the floor" is not an answer.
• How do you prevent cross-contamination between runs? CIP, COP, allergen validation, master sanitation schedule.
• What's your pest control program? Contractor, service frequency, trap logs.
• What's your employee GMP training? Documented, annual, multi-language?

References

• Three current customers in a similar category. "Similar" matters — great at RTD coffee doesn't mean great at shelf-stable sauce.
• One former customer who left. Best interview in the whole process. A co-packer that won't provide one is hiding churn.

Phase 3 — Contracting (Before You Sign)

This is where good relationships go bad in year two. The language you accept now becomes the floor when conditions change.

Pricing Structure

• Price per unit, per case, per production hour, or tolling? All four exist. Know which and why.
• What triggers a price increase, and how much notice? Watch for raw material indexing, labor pass-through, utility surcharges, CPI adjustments. Some are reasonable; some are blank checks.
• Who owns the production waste — giveaway, trim, overpack? In tolling, this matters a lot.
• What happens on underruns vs. overruns? Typical tolerance is ±10%. If you run hot, who buys the extra? If you run short, who eats it?

Term and Termination

• Initial term and auto-renewal? One year with a 90-day exit beats five years with a one-year termination penalty.
• Termination-for-convenience clause? Notice period, transition costs, remaining commitments — all negotiable.
• Termination-for-cause standard? Quality failures, missed deliveries, failed audits — define the threshold.
• Who owns remaining raw materials, WIP, and finished goods if I terminate? Without this "orderly exit" clause, you can walk away owing six figures in unused inventory.

Intellectual Property

• Who owns my formula? Yours, entirely. Watch for quiet clauses claiming joint rights on "process improvements."
• Confidentiality standard? A simple NDA is table stakes. You want carve-outs for your recipe, supplier list, and specifications.
• Can the co-packer produce a competing product? Many will. You want a narrowly defined non-compete on your specific SKU — not a blanket lock.

Insurance and Liability

• Product liability coverage, per occurrence and aggregate? Industry standard: $5M/$10M minimum. Retailers require it.
• Additional insured endorsement — both ways? Yes.
• Indemnification structure? Who pays on a co-packer error recall, a formulation defect, a supplier ingredient failure?

Phase 4 — Ongoing (Year One and Beyond)

You don't ask these before signing. You ask them every quarter after.

• What's my on-time, in-full (OTIF) rate? Below 95% is a problem. Below 90% means you need a second co-packer.
• What's our defect rate? PPM at receiving, consumer complaints per thousand cases — one number, tracked over time.
• How do we forecast together? A rolling 13-week forecast with 4 weeks firm is standard. A co-packer flying blind on your volume can't support your growth.
• Who's my day-to-day contact, and who escalates? Single-point relationships break the first time your contact takes PTO during a crisis.
• When do we review the relationship formally? Quarterly business reviews aren't optional.

The Questions Most Founders Don't Ask

• What's your employee turnover rate? High floor turnover correlates directly with quality incidents. Ask for a number.
• How financially stable is your business? Revenue bands, years in operation, ownership structure, recent M&A. A co-packer mid-PE-handoff is a co-packer whose priorities are about to shift.
• What's the worst production problem you've had in two years — and how did you handle it? Everyone has one. The answer tells you how they behave in a crisis.
• If I showed up unannounced today, what would I see? A co-packer comfortable with surprise tours runs a clean plant.

Red Flags That Mean Walk Away

Any one of these should end the conversation:

• Won't share their most recent audit report (even redacted)
• Won't provide current customer references in your category
• Won't provide one former customer reference
• Refuses a short-notice facility tour
• GFSI certification has lapsed, been suspended, or downgraded
• Recent recall with unclear root cause or corrective action
• Vague or evasive answers on allergen control
• Contract terms that block orderly exit
• High floor turnover without acknowledgment
• Sales team pressuring you to sign before a tour

Packaging: The Question Most Founders Skip

One question gets skipped during co-packer evaluation and costs brands the most downstream: who sources the packaging, and to whose spec?

If the co-packer sources, you need to know:

• Their approved packaging supplier list
• Whether they'll source to your spec or only theirs
• How packaging cost changes flow through to your price
• Who's liable if the packaging fails (tampered seal, split pallet, in-transit damage)

Most co-packers will accept drop-shipments of packaging from any qualified supplier. That's how ePackageSupply works with most of the food and beverage brands in our book — we ship food-grade buckets, pails, lids, and closures directly to co-packer facilities nationwide, with documentation (FDA Letter of Guarantee, 21 CFR statements, allergen-free declarations) already in the box. Your co-packer doesn't have to source it, your retailer gets clean docs on audit day, and the per-unit cost is usually better than what a co-packer would pass through.

There's a strategic reason too: supplier leverage at transition time. If your co-packer sources your packaging, leaving them means re-qualifying a packaging supplier. If you own that relationship, you can move co-packers without moving the rest of your supply chain.

Final Word

A co-packer is not a vendor. It's the production arm of your brand. You don't need perfect answers to every question above — you need consistent ones, documented ones, and the ability to verify what you're told before you sign.

If you're evaluating a co-packer and need food-grade packaging that ships direct with full compliance documentation, reach out to our team.

FAQ

What's the difference between a co-packer and a contract manufacturer?

In practice, nothing. "Co-packer" is the older term, more common in food and beverage; "contract manufacturer" is used more in nutraceuticals, cosmetics, and household goods. Both refer to a third-party manufacturer producing finished goods on your behalf. Some industries distinguish a co-packer (fills and packs) from a contract manufacturer (formulates and produces from raw ingredients), but most modern facilities do both.

How long does it take to onboard a new co-packer?

Typical onboarding from first contact to first production run is 8 to 16 weeks: 2-4 weeks screening and tours, 4-6 weeks formulation or spec transfer, 2-4 weeks first-article production and QA approval, 2 weeks commercial run scheduling. Faster is possible for drop-in SKUs; slower is common for new formulations or regulated categories.

What MOQ should I expect from a food co-packer?

MOQs vary by format. Dry-blend powder, stick pack, or shelf-stable liquid co-packers often start at 1,000-5,000 units. Retail-scale beverage co-packers typically require 10,000-30,000 units per run. Aseptic fill lines can require 50,000+. Ingredient sourcing sets its own floor — if your key raw material ships by the drum, that's your real minimum.

Do I need SQF certification to sell to major retailers?

Your co-packer does. SQF Edition 10 (published March 2026) is GFSI-benchmarked and required by Walmart, Costco, Kroger, Sysco, US Foods, and most major retail and foodservice buyers for every manufacturing facility in their supply chain. Your brand doesn't need to be SQF-certified directly, but every facility that produces your product does. Deal-breaker question during screening.

How do I know if a co-packer is lying about their capacity?

Ask to see their production schedule. A reputable co-packer will show you a redacted version — customer names blacked out, but line utilization, shift counts, and open slots visible. A co-packer refusing every version of this request is telling you they're overbooked or underbooked and don't want you to know which.

Should my co-packer source my packaging, or should I?

Most brands over a certain size source their own. Better per-unit pricing, vendor leverage at transition time, and clean compliance documentation flowing directly to your retailer rather than through a third party. Your co-packer will typically accept drop-shipments from any qualified supplier. ePackageSupply ships food-grade buckets, pails, lids, and closures to co-packer facilities nationwide with FDA and 21 CFR documentation included.

What's the average contract term for a co-packer relationship?

One year with 90-day termination-for-convenience notice is the most founder-friendly structure. Longer terms (3-5 years) are common at larger scales but should include clear exit ramps. Avoid any contract where the termination penalty exceeds 90 days of projected volume — that's a co-packer protecting itself against your growth.