How to Become a Costco Supplier: No Application Portal, So Get Your Entity and Tax Setup Ready First
Costco has no public supplier application: non-food prospects contact the Issaquah office, food prospects a regional office, and buyers decide. For tax you are a wholesaler: Costco collects sales tax, you sell for resale and get no 1099-K. Settle the contracting entity, W-9 or W-8BEN-E, resale certificates and Form 5472 first.
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