What type of entity are you?
If you take credit cards, have another entity do it on your behalf, in return for your products or services, or accept donations meant for your organization, you are most likely a merchant.



If you process, store or transmit credit card data on behalf your customers or other organizations, you are a service provider. This includes organizations that provide services (such as web hosting, managed payment services, etc.) that control or could impact the security of cardholder data.



If you are a business or organization that stores, process or transmits credit cards from any of the five card brands that make up the PCI SSC (Amex, Discover, JCB, MasterCard or Visa) you will be subject to PCI DSS, irrespective of the number of transactions.