Injection Molding RFQ Template & Buyer Checklist

Injection molding quotes come back slow, wildly different from one supplier to the next, or not at all—and most of the time the supplier isn’t the problem. The request for quote (RFQ) simply arrived incomplete. Faced with a part but no material, no quantity, no tolerances, and no timeline, a molder has three options: pad the number to cover what they’re guessing at, fire back a list of questions, or set the inquiry aside for the buyers who did the homework. None of those gets you a clean quote.

This is an independent buyer resource for procurement managers, founders, product owners, design engineers, and sourcing managers preparing a quote-ready RFQ. It’s an educational guide, not a quote guarantee: PlasticsTechnologyAlliance.com does not manufacture parts, does not quote, and does not run a supplier directory or matching service. What follows is the information a molder needs to price your part on the first pass, plus a framework for reading the responses you get back. Before you hit send, the RFQ readiness explainer helps you decide whether the package is ready to go, ready with flagged gaps, or better held.

When This Template Is Most Useful

You’ll get the most out of this template if you’re buying injection molding for the first time and aren’t sure what suppliers expect, if you’re running a low-volume or prototype project where the tooling strategy isn’t settled, or if you’re comparing domestic and offshore suppliers and need their quotes to mean the same thing. It’s also worth the effort whenever your tooling assumptions are still open—because every assumption you leave unstated, the supplier fills in for you, usually conservatively.

What Is an Injection Molding RFQ?

An injection molding RFQ is the package of files, specifications, and commercial requirements you hand a supplier so they can prepare a quote. Think of it as the difference between “can you make this?” and a document a molder can actually put a number against.

Done well, it lets a supplier:

Judge part complexity. Geometry, undercuts, wall thickness, and tolerances drive both moldability and tooling difficulty.
Decide a tooling strategy. Quantities and intent determine whether they propose aluminum, soft steel, or production tooling, and how many cavities.
Price material, quantity, lead time, and quality. Each of these is a separate cost lever, and each needs to be specified.
Reduce assumptions. Every blank in your RFQ becomes a supplier assumption, and assumptions usually get priced conservatively.
Make quotes comparable. When every supplier prices the same defined scope, you can compare quotes side by side instead of comparing guesses.

A strong RFQ does not guarantee a fast or cheap quote. It does remove the most common reasons quotes are slow, inflated, or impossible to compare.

The Minimum RFQ Package

Use this as a baseline checklist. If you can supply everything here, most suppliers can quote without coming back with a list of questions first.

3D CAD file, preferably STEP (.step / .stp). Native CAD or Parasolid also works for many shops.
2D drawing if any tolerances, datums, or critical dimensions matter.
Material, including acceptable substitutes or equivalents.
Estimated annual usage (EAU)—your best estimate of yearly volume.
First order quantity—how many parts you actually want in the first run.
Target production timeline—when you need first parts and ongoing parts. (For what supplier-quoted weeks do and don’t include, see injection molding lead time.)
Surface finish / texture expectations (e.g. as-molded, SPI finish, specific texture).
Color requirement, including whether you’ll supply colorant, masterbatch, or a color standard.
Secondary operations (inserts, pad printing, assembly, ultrasonic welding, etc.).
Packaging requirements, if any.
Inspection / documentation requirements.
Tool ownership expectations—who owns the mold and where it lives.

The sections below expand on the items that most often get left vague.

Part Design Information Suppliers Need

A CAD file answers many questions, but suppliers still rely on you to flag intent that geometry alone does not communicate. The more of the following you can call out, the fewer assumptions a supplier has to make:

Part dimensions and overall envelope, so the supplier can size the tool and machine.
Wall thickness, including whether walls are intended to be uniform and where they vary.
Undercuts, which may require side actions or lifters and affect tooling cost.
Ribs and bosses, especially their thickness relative to the adjacent wall.
Draft angle—whether draft is already applied, and where it cannot be added for functional reasons.
Cosmetic surfaces versus surfaces that are hidden or non-critical.
Critical dimensions that must hold tolerance for the part to work.
Assembly interfaces—mating parts, snap fits, threads, seals, and how this part fits the larger assembly.

If you are not sure your part is moldable as designed, that is worth resolving before you send the RFQ. For guidance on geometry that molds cleanly and the changes suppliers commonly request, see the plastic part design-for-manufacturing guide.

Material and Finish Requirements

“Plastic” is not a material specification. Resin choice affects price, shrinkage, tooling, cycle time, and whether the part performs in its environment, so the more precisely you can describe it, the more accurate the quote.

Try to provide:

Resin family (e.g. ABS, PC, PP, nylon/PA, POM).
Grade, if you know it, or a named reference grade you’re targeting.
Acceptable alternatives or equivalents, so the supplier can offer something they stock or run more efficiently.
Color, plus how it will be matched—your colorant, a masterbatch, or a color standard.
Texture, including any specific texture standard or “as-molded smooth.”
Cosmetic vs non-cosmetic surfaces, so the supplier knows where appearance matters.
Performance requirements that constrain the material: UV resistance, flame rating, impact, chemical resistance, temperature, food or skin contact, and so on.

If you genuinely don’t know the material yet, say so. If material is open, write “open” in the field instead of leaving it blank, and describe the application and environment so the supplier can suggest options rather than guess. A blank field reads as an oversight; “open” reads as an invitation.

Volume, Tooling and Production Assumptions

Volume and intent drive the tooling strategy, and tooling is usually the largest single cost in a molding project. Be explicit about how many parts you need and what the program is meant to do.

Estimated annual usage (EAU). Even a rough range helps the supplier choose tooling and cavitation.
First order quantity. The first run is often different from steady-state demand—state both.
Prototype vs production intent. Are you validating a design, or committing to ongoing production?
Low-volume vs bridge vs production. These point to different tooling strategies, not just different quantities. For where the boundaries blur and how to frame your quantities, see the low-volume injection molding buyer guide.
Number of cavities. You can specify this, or ask the supplier to recommend cavitation for your EAU.
Expected tool life. How many total parts the tool may need to produce over its life.
Tool ownership. Who owns the mold, whether you can transfer it later, and where it is stored.

Tooling choices have long-term consequences for cost, lead time, and your ability to move work later. For background on mold construction and the questions worth asking, see mold-making considerations.

Quality and Documentation Requirements

Quality requirements can change a quote substantially, so include only what you actually need—and be clear when you do need it. Over-specifying documentation you don’t require inflates the quote; omitting documentation you do require leads to a re-quote later.

Consider whether you need:

Dimensional inspection—a basic dimensional report against your drawing.
First article inspection (FAI)—a formal first-article report on initial parts.
Material certificates—certs of conformance or analysis for the resin.
PPAP—the Production Part Approval Process, where your program or industry calls for it.
Cpk / Ppk capability indices—only specify these if you genuinely require statistical capability data, because they carry real cost.

Quality system certifications such as ISO 9001 or, for medical work, ISO 13485 are best treated as supplier evaluation considerations. This is general buyer guidance, not regulatory or legal advice; if your product is regulated, confirm requirements with the appropriate qualified resource.

Common RFQ Mistakes That Lead to Bad Quotes

Most quoting problems trace back to a handful of missing pieces. The table below maps each gap to the assumption suppliers tend to make and how to close it.

Mistake	What suppliers assume	How to fix it
No STEP file (only a PDF, image, or sketch)	They guess at geometry, or decline to quote	Provide a 3D model, preferably STEP
No estimated annual usage (EAU)	They guess at tooling and cavitation, often conservatively	State EAU and first order quantity, even as a range
No material specified	They assume a default resin that may not perform or may not be in stock	Name a resin family and grade, plus acceptable alternatives
No tolerance notes	They assume standard tolerances, which may be too loose or needlessly tight	Add a 2D drawing flagging critical dimensions
Unclear cosmetic requirements	They assume a finish level—either too high (costly) or too low (rejected)	Mark cosmetic vs non-cosmetic surfaces and name the finish
No target timeline	They schedule against their own backlog, not your need	State when you need first parts and ongoing parts
No tooling ownership discussion	They assume their standard ownership/storage terms	Specify who owns the tool and whether it can transfer
Asking only “how much per part?”	They quote part price without tooling, or with hidden assumptions	Ask for tooling cost, part price, and what’s included/excluded

Copyable Injection Molding RFQ Template

Copy the template below into an email or document and fill in each field. Leave a field blank only when you genuinely have no answer yet—and flag it as open so the supplier knows it’s a question, not an omission.

INJECTION MOLDING RFQ

1. PROJECT OVERVIEW
   - Company / contact:
   - Part name / number:
   - What the part does / application:
   - Prototype, bridge, or production intent:

2. PART FILES
   - 3D CAD attached (format, e.g. STEP):
   - 2D drawing attached (yes/no):
   - Critical dimensions / datums noted on drawing:

3. MATERIAL
   - Resin family:
   - Grade (if known):
   - Acceptable alternatives / equivalents:
   - Color and how it's matched:
   - Texture / surface finish:
   - Performance requirements (UV, flame, impact, chemical, temp, contact):

4. VOLUME
   - Estimated annual usage (EAU):
   - First order quantity:
   - Future / repeat order expectations:

5. TOOLING EXPECTATIONS
   - Preferred tooling strategy (or "supplier to recommend"):
   - Number of cavities (or "supplier to recommend"):
   - Expected tool life:
   - Tool ownership and storage:

6. QUALITY REQUIREMENTS
   - Dimensional inspection / report needed:
   - First article inspection (FAI):
   - Material certificates:
   - PPAP (if applicable):
   - Cpk / Ppk (only if required):
   - Quality system relevant to evaluation (e.g. ISO 9001 / 13485):

7. SECONDARY OPERATIONS & PACKAGING
   - Inserts, printing, assembly, welding, etc.:
   - Packaging requirements:

8. TIMELINE
   - Need first parts by:
   - Need ongoing parts by:
   - Any fixed milestones:

9. COMMERCIAL NOTES
   - Target budget or range (optional):
   - Shipping destination / Incoterms:
   - Payment terms expectations:

10. QUESTIONS FOR THE SUPPLIER
   - What is included and excluded in the quote?
   - What assumptions did you make to price this?
   - What design changes (if any) would you recommend?
   - What is the cost of a tool revision?
   - What is the lead time for tooling and for first parts?

How to Compare Supplier Responses

A consistent RFQ makes quotes comparable; a consistent comparison framework makes the decision clear. When responses come back, resist the urge to sort by the biggest number on the page. Line them up against the same line items instead—a low part price routinely hides a high tooling cost, a long lead time, or a chunk of scope that simply isn’t in the quote.

Quote item	Why it matters	What to check
Tooling cost	Usually the largest upfront number, and tied to tooling type	What tool material and tooling strategy does it buy?
Part price	The recurring cost that compounds over the program	At what quantity break is it quoted?
Tooling ownership	Decides whether you can move the tool later	Who owns the mold, and is that stated in writing?
Sample rounds	More rounds mean more time before approval	How many T1/T2 samples are included before extra charges?
Revision cost	Tool changes after cutting steel can be expensive	What does a typical revision cost, and what counts as one?
Inspection / documentation	Quality scope is where quotes quietly diverge	Are dimensional reports, FAI, or certs included or extra?
Shipping, duties, landed cost	The ex-works price isn’t what you actually pay	What’s the total delivered cost, including freight and duties?
Lead time: tooling vs production	These are two separate clocks, often confused	What’s the lead time to build the tool vs to run production parts?

Two softer signals are worth weighing alongside the table. First, the quote assumptions—what each supplier filled in where your RFQ was silent; the fewer and more reasonable, the better. Second, any DFM comments: a supplier who flags a wall-thickness or undercut concern with their quote has actually looked at your part, which often matters more than a slightly lower price.

Comparing the full picture is how you avoid buying the cheapest quote instead of the best fit. For a structured way to evaluate the suppliers themselves, see the supplier capability checklist. To sanity-check the tooling and part-price figures you receive, see the injection mold cost guide.

Buyer FAQs

What files are needed for an injection molding quote?

At minimum, a 3D CAD model—preferably a STEP file—so the supplier can assess geometry and moldability. If tolerances, datums, or critical dimensions matter, add a 2D drawing. Beyond files, suppliers also need material, quantity (EAU and first order), timeline, finish, and quality requirements to quote accurately rather than make assumptions.

Is a STEP file enough for an injection molding RFQ?

A STEP file is usually enough to start, and many suppliers can quote from one. But it does not communicate tolerances, critical dimensions, cosmetic surfaces, material, or quantity. For a quote that won’t need revising later, pair the STEP file with a 2D drawing (when tolerances matter) and the commercial details in the template above.

Do I need a 2D drawing?

Not always. If your part has only general tolerances and no critical features, a well-built 3D model may be enough. You need a 2D drawing when specific dimensions must hold tolerance, when you have datums or GD&T, or when cosmetic and functional surfaces need to be called out. The drawing is how you tell the supplier which dimensions actually matter.

Should I specify material or let the supplier choose?

Specify it if you can—at least the resin family, ideally a grade, plus acceptable alternatives. Material affects price, performance, shrinkage, and tooling. If you truly don’t know, describe the application and environment so the supplier can recommend options, but expect a wider quote range until the material is fixed.

What quantity should I include?

Include both your estimated annual usage (EAU) and your first order quantity, since they’re often different and drive different decisions. EAU guides tooling strategy and cavitation; first order quantity affects the initial run cost. A rough range is far more useful than leaving quantity blank, which forces the supplier to guess.

Why did suppliers not respond to my RFQ?

The most common reason is an incomplete RFQ—no 3D file, no material, no quantity, or no timeline—which makes the job hard to price and easy to deprioritize. Other reasons include a part outside the shop’s typical size or volume range, unrealistic timelines, or quantities below what a shop normally takes. A complete, specific RFQ reduces the first of these and helps you target suppliers who fit the rest.

How do I compare injection molding quotes?

Compare the same factors across every quote: tooling cost, part price (at a stated quantity), lead time for tooling and first parts, the assumptions each supplier made, what’s included and excluded, revision cost, sample approval, and total landed cost. A consistent RFQ is what makes these comparisons valid—if each supplier priced a different scope, the numbers aren’t comparable.

Before you send the package, run it through the RFQ Readiness Checker—a fast pre-send checklist that catches the gaps most likely to trigger a supplier clarification round.

Injection Molding RFQ Template: What to Include Before Asking for a Quote