Costco Vendor Compliance Checklist 2025

Philosophy

Costco's High Standards

Costco is known for stringent quality and safety standards. They have a "Buyer's Guide for Vendor Compliance" and maintain the strictest supplier requirements of any major U.S. retailer. Costco does not compromise on:

Chemical Safety

Costco bans PFAS, phthalates, BPA, and other harmful chemicals more aggressively than competitors. Zero tolerance for undisclosed hazards.

Packaging Sustainability

Packaging must be minimal, recyclable, or compostable. Costco tracks and measures vendor sustainability initiatives.

Manufacturing Standards

Factories must meet Costco's ethical, safety, and environmental requirements. Third-party audits required for many categories.

Reality Check: Costco rejection rates are higher than Amazon and Walmart. If your product doesn't meet Costco's standards, they won't negotiate—they'll move to the next supplier. Over-prepare and double-check everything.

Chemical Safety

Chemical Screening Checklist

Costco maintains its own restricted substance list (RSL) that is stricter than most regulations. Any product containing these chemicals must be disclosed and tested.

Chemicals to Screen For

PFAS (Per- and Polyfluoroalkyl Substances)
Costco has a zero-PFAS policy for textiles, food-contact materials, and cookware. Must test for PFAS; if found, product cannot be sold at Costco.

Phthalates (6 restricted types)
DEHP, DBP, DIBP, BBP, DNOP, DIDP — all limited to 0.1% in textiles, toys, and childcare items

Heavy Metals (Lead, Cadmium, Mercury, Arsenic)
Testing limits vary by product; paint, coatings, jewelry, and food-contact items require testing

Formaldehyde
Required for textiles (< 75 ppm) and wood products. Testing per CPSC or equivalent standard.

BPA (Bisphenol A)
Banned in children's products; restricted in food-contact materials (cookware, containers)

Azo Dyes
Restricted in textiles (11 banned aromatic amines). Test dyed fabrics and printed items.

Flame Retardants
Some flame retardants are restricted. If product is flame retardant, confirm chemicals are Costco-approved.

Best Practice: Start with a full chemical screening before any other compliance work. It's cheaper to identify chemical issues early than after investing in testing and marketing.

Sustainability

Packaging Requirements Checklist

Costco has explicit packaging requirements focused on sustainability and waste reduction. This is a major differentiator from other retailers.

Minimal Packaging
Packaging should be as minimal as possible while protecting product. No excessive inserts, cardboard, or plastic.

Recyclable Materials
All packaging must be recyclable in standard curbside programs OR clearly labeled as recyclable. No mixed materials.

No PFAS in Packaging
Packaging cannot contain PFAS (no water-resistant coatings with PFAS). Test packaging material if unsure.

Bilingual Labeling
All labels must be in English AND Spanish (for most products). French for products sold in Canada regions.

Frustration-Free Packaging
No excessive plastic clamshell, tape, or security devices that make opening difficult and create waste.

Compostable Option (if applicable)
For food, personal care, or similar: if you can offer compostable packaging, Costco values this.

Clear Recycling Instructions
If not standard recyclable, label must clearly state "NOT recyclable in curbside programs" or equivalent.

Avoid Single-Use Plastics
Minimize or eliminate single-use plastic in packaging. Use recycled content when possible.

Common Mistake: Submitting non-recyclable packaging. If your packaging isn't recyclable, Costco will likely reject the product. Test with your local recycling program before submission.

Safety Verification

Product Testing Checklist

Costco requires third-party testing by accredited, independent laboratories. All tests must use recognized standards.

Testing by Category

Toys & Children's Products

✓ CPSIA lead/phthalate testing
✓ Flammability testing (CPSC-16 CFR 1610)
✓ Mechanical hazard testing (ASTM F963)
✓ Children's Product Certificate (CPC)
✓ Choking hazard assessment

Cookware & Food-Contact

✓ Heavy metal testing (lead, cadmium)
✓ Migration testing (FDA or equivalent)
✓ BPA screening
✓ Non-stick coating analysis
✓ Durability/longevity testing

Textiles & Apparel

✓ Formaldehyde testing (< 75 ppm)
✓ Azo dye testing (11 banned amines)
✓ Heavy metal testing
✓ Fiber content analysis
✓ Flammability (sleepwear: CPSC-16 CFR 1615-1616)

Electronics

✓ FCC testing (if applicable)
✓ RoHS compliance testing
✓ Safety testing (UL/IEC standards)
✓ Heavy metal screening
✓ PFAS screening (if water-resistant)

Beauty & Personal Care

✓ Heavy metal analysis (lead, arsenic, mercury)
✓ Microbiological testing
✓ Stability testing (6-12 months)
✓ PFAS screening
✓ Preservative efficacy

Furniture

✓ Flammability testing (CPSC standards)
✓ Lead in paint/coating
✓ Heavy metal screening
✓ Structural integrity testing
✓ PFAS in coatings screening

Lab Selection: Use a lab experienced with Costco submissions. They know which standards Costco requires and can provide test reports in Costco's preferred format. Costco may reject reports from unknown labs.

Paperwork

Documentation Checklist

Costco requires comprehensive documentation. Have all of these ready before submitting product.

Comprehensive Test Reports
Full test reports from accredited lab covering all applicable tests with detailed results and methods

Chemical Screening Report
Separate report documenting screening for PFAS, phthalates, heavy metals, formaldehyde, azo dyes

Bill of Materials (BOM)
Detailed material composition with percentages, including all coatings, dyes, and treatments

Product Safety Certificate or Declaration of Conformity
Signed statement confirming product meets all applicable standards and Costco requirements

Safety Data Sheets (SDS) for All Components
MSDS/SDS for any chemical components, dyes, coatings, or materials in final product

Product Labeling Sample
Photograph or actual sample of product label showing bilingual (English/Spanish) labeling

Packaging Recyclability Certification
Document confirming packaging is recyclable in standard curbside programs or clearly labeled otherwise

Factory Compliance Documentation
Factory location, certifications (ISO 9001, etc.), safety certifications, and environmental compliance records

Country of Origin Certification
Documentation of where product is manufactured

Document Completeness: Costco will reject incomplete submissions. If you're missing even one document, your application goes to the back of the queue. Triple-check that every requested item is included.

Application

Costco Vendor Questionnaire Guide

Costco provides a detailed questionnaire that you must complete. Here's what to expect and how to prepare.

Key Sections of the Questionnaire

Product Information

Product description and category

Target market (U.S., international, both)

Production capacity (units per month/year)

Lead time for orders (weeks to delivery)

Minimum order quantities (MOQ)

Compliance & Safety

Confirmation of third-party testing completion

Compliance with Costco Restricted Substances List

Packaging recyclability (with supporting documentation)

Supplier Code of Conduct acknowledgment

Conflict minerals declaration (if applicable)

Quality Assurance

Quality control procedures and testing protocols

Defect rates and warranty information

Recall procedures and product traceability system

Customer complaint resolution process

Tip: Prepare answers before receiving the questionnaire. Have company information, certifications, testing data, and quality procedures documented. This speeds up the application process.

Key Points

Important Costco Considerations

Volume Requirements: Costco typically requires manufacturers to produce large volumes. If your production capacity is under 50,000 units/month, Costco may not be viable yet. Plan to scale.

Direct Relationships: You typically work directly with Costco, not through distributors. You'll need to manage logistics to Costco distribution centers yourself or via a logistics partner.

Price Negotiations: Costco negotiates aggressively on price. Margins are tighter than Amazon or Walmart. Ensure your costs support Costco's typical markups.

Lead Times: Costco moves quickly. Once approved, they may place orders with short lead times. Ensure manufacturing can scale on demand.

Continuous Compliance: After approval, you must maintain compliance. Costco conducts periodic audits and spot checks of your products and manufacturing.

Ready to Supply Costco?

RetailAssured specializes in helping manufacturers meet Costco's stringent standards. From chemical screening to compliance documentation, we ensure your products meet Costco's requirements.

Schedule Costco Readiness Assessment Learn About Testing Services

Costco's High Standards

Chemical Safety

Packaging Sustainability

Manufacturing Standards

Chemical Screening Checklist

Chemicals to Screen For

Packaging Requirements Checklist

Product Testing Checklist

Testing by Category

Toys & Children's Products

Cookware & Food-Contact

Textiles & Apparel

Electronics

Beauty & Personal Care

Furniture

Documentation Checklist

Costco Vendor Questionnaire Guide

Key Sections of the Questionnaire

Company Information

Product Information

Compliance & Safety

Quality Assurance

Important Costco Considerations

Ready to Supply Costco?