Questions to Ask a Contract Manufacturer, and What Good Answers Sound Like
Most lists of questions to ask a contract manufacturer stop at the question. That is the easy part. Every factory will say yes to "Can you make this?" and "Do you have quality control?"
What matters is the answer, and whether it is specific enough to check later. This guide gives you 20 questions, grouped by topic, with what a strong answer and a red-flag answer sound like. It also gives you a 30-minute agenda so the first call produces a decision: quote, park, or drop.
The examples come from two fictional companies in our playbook: Northline (an aluminum laptop stand, 3,000 units at launch) and Rainwell (a 30 mL skincare serum, 200 kg first batch).
A first call is a screen, not a negotiation
In 30 minutes you are trying to learn three things:
- Can they make this kind of product, at this scale, in this building?
- Will they tell you the truth when the truth is inconvenient?
- Do they want your business at the volume you actually have?
You will not get proof on a first call. You will get claims. Your job is to hear which claims are specific enough to verify and which are just sales.
The 30-minute agenda
Send this with the calendar invite. It tells them you are organized, and it tells them to bring an engineer.
| Minutes | Block | What you want out of it |
|---|---|---|
| 0 to 3 | Introductions and roles | Is there an engineer on the call, or only sales? |
| 3 to 8 | Your product in five minutes | Product, volumes, timing, and the two or three things that must not go wrong |
| 8 to 22 | Your questions | Pick 8 to 10 from the lists below. Do not try all 20. |
| 22 to 27 | Their questions | Answer honestly, including what you do not know |
| 27 to 30 | Next steps | Who sends what by when: NDA, RFQ, samples, visit |
Put your hardest question in the first 15 minutes. If the call runs long, that is the one that gets skipped.
Fit and capability
| Ask | Strong answer | Red-flag answer |
|---|---|---|
| 1. What products like ours do you make today? | Names a similar category, process, and volume. Offers a part or photo with the customer hidden. | "We can make anything." Or shows another client's product with its brand visible. |
| 2. Which of our processes run in this building, and which do you send out? | A clear in-house vs outside list, and how they control outside steps. "Anodize goes to a partner 10 km away. We inspect every lot on return." | "Everything is in-house," which you later find is not true. |
| 3. What run size is comfortable on the line we'd use? | A range, and where you sit in it. "3,000 is small for us but fine for a first run." | Your volume is at the edge of their range and they do not mention it. |
| 4. Who would be our day-to-day contact, and who is the engineer? | Names both. The engineer is on this call or the next. | "Your sales rep handles everything." |
| 5. What would make you decline this project? | Something specific. "If you need Class A cosmetic on both faces at this price, we'd pass." | "Nothing. We'd love to do it." |
Question 5 is the most useful question on the list. A manufacturer that can say no, or not yet, is one that will also tell you when a lot is bad.
Engineering and quality
| Ask | Strong answer | Red-flag answer |
|---|---|---|
| 6. From what you've heard, what worries you about this product? | A real technical concern. Hardware: "Hinge torque may drift as parts wear in. How are you specifying it?" Formulated: "Viscosity may shift on our homogenizer at 200 kg." | "Looks straightforward." |
| 7. How and when do you give design-for-manufacturing (DFM) feedback? | Written review before the final quote, free or at a stated fee. | "We build to print." |
| 8. How do you measure our critical features? | Names the equipment and when they check. | "We check visually." |
| 9. Which certifications do you hold for this address, and what is the scope? | Sends the certificate. Address and scope match the site and process. | The certificate belongs to a head office or another site. "It's being renewed." |
| 10. Walk me through your last significant quality problem. | Dates, containment, root cause, the fix, and an offer to show the report (redacted). | "We don't have quality problems." Or "operator error, we retrained." |
| 11. What first-pass yield do you see on similar products, and where do you lose the most? | A range by product family, and the worst station named. | "99%" for everything, with no data. |
| 12. Will you accept third-party inspection and customer audits? | Yes, with notice, and other customers' records shown redacted. | Refuses. Or offers to show another customer's files unredacted. |
For cosmetics, add: "Is this site registered with FDA as a cosmetic facility, and which good manufacturing practice standard does it follow?" As of September 2026, facility registration under MoCRA is a listing with FDA, not an approval or certification. A manufacturer that calls it "FDA approved" is telling you something about how carefully it uses words.
Capacity and schedule
| Ask | Strong answer | Red-flag answer |
|---|---|---|
| 13. How busy is the line we'd use, and when is peak season? | A number and a season. "About 70% loaded. Q4 is tight." | "Plenty of capacity." |
| 14. What is your lead time for samples, first production, and repeat orders? | A breakdown: material, tooling, production, testing, release. | One short number with no breakdown. |
| 15. What is your shutdown calendar for the next 12 months? | Sends dates, including how long the ramp back takes after the longest holiday. | "We never close." |
Money and ownership
| Ask | Strong answer | Red-flag answer |
|---|---|---|
| 16. Can you break your quote into categories: material, conversion, outside processing, setup, NRE, margin? | Category totals now. Line-level detail on pass-through costs after award. | One number, and no breakdown at any level. |
| 17. What is your MOQ, and what drives it? | A reason: setup cost, a supplier's minimum, vessel size. | A number with no reason and no path down. |
| 18. What are payment terms for a new customer, and what does the deposit cover? | A 30 to 50 percent deposit sized to material they must buy non-cancellable, with the balance tied to inspection. | 100% up front. Or a deposit well above their material exposure. |
| 19. Who owns tooling and fixtures we pay for (or our formula)? | "You own what you pay for. We tag it and give you a letter." | "Tooling is amortized in the price, so it's ours." Or "We'd put this on our base." |
| 20. What else runs on the line we'd use, and who can see our files? | Names product types, not customers. Access-controlled storage. | "Lots of things." Files shared over personal email. |
A note on question 18: a 50 percent deposit from a pre-revenue company is not a red flag on its own. The factory is buying aluminum or actives it cannot return for a brand with no track record. Ask what the deposit covers, then negotiate what the balance waits for. (Our guide to contract manufacturer red flags covers other things that look bad but are not.)
Expect questions back
They are screening you too. Expect to be asked about volumes, funding, timeline, who makes decisions, and whether the design is frozen. Answer honestly, including what you do not know. A vague customer gets a padded quote. Uncertainty they know about becomes a planning range. Uncertainty they discover later becomes a trust problem.
Before the call, run your numbers through the product cost calculator so you can give a realistic target without revealing your whole margin.
Answers that end the call
You do not have to finish the agenda. Thank them and mark them "park" or "drop" if you hear:
- They will not say what is done at this address.
- They demand full drawings or the full formula before any NDA.
- They claim ownership of tooling you pay for, or make adapting your formula to their base a condition.
- They refuse customer audits or independent inspection.
- They want 100 percent payment before a sample is approved.
Rainwell heard two of these from its lowest-priced candidate: a minimum batch 2.5 times its launch need, and a plan to "adapt the formula to our proven base." The MOQ might change at scale. The formula ownership issue would not.
Write it down within an hour
Fill in your notes before the next call blurs the details. Record exact phrases. "We usually" and "we can" mean different things. Log each candidate's answers in the same format so you can compare them side by side.
Frequently asked questions
How many questions should I ask on the first call?
Eight to ten. Pick the ones that match your biggest risk. Save the rest for the RFQ or a follow-up call. Trying to cover everything means covering nothing well.
Who should join the first call from my side?
Whoever runs the relationship (often the founder or program lead) plus one technical person who can judge engineering or formulation answers. Ask the manufacturer to bring an engineer, not only sales.
What is the single most revealing question?
"What would make you decline this project?" A specific answer shows they understand your product and are willing to say no. "Nothing" usually means they have not thought about it yet.
Should I share my target price?
Not on the first call. After an NDA, you can share a landed-cost range if asked. Sharing your exact target early tends to anchor the quote to it.
Next steps
- Take the free manufacturer readiness check to see what they will ask you for.
- The Contract Manufacturing Playbook includes the full First Manufacturer Call Kit: all 28 questions with strong and red-flag answers, the outreach email template (blank and filled), and a post-call notes form.