Independent Sales Organization (ISO)

What an ISO is

An independent sales organization, or ISO, is a third-party company that sells or arranges card-processing services for businesses. It connects your business with the financial institutions and processing companies involved in accepting card payments. The ISO is a sales and service intermediary, not a card network or the bank that issues your customer’s card.

An ISO can help establish a separate merchant account for your business, with your own merchant ID (MID). Depending on the company, its services can include account setup, customer support, point-of-sale equipment, software integrations, installation and training. The services are not standardized, so two ISOs can offer different combinations.

An ISO connects you to processing, but the contract and statement show what your business actually pays.

How the relationship works

Your ISO manages the sales relationship and may help with setup or ongoing account service. The payment processor supplies the technical systems that authorize, route and settle transactions. The acquiring bank provides the banking relationship behind your merchant account. Knowing which company handles each job helps you direct a funding, equipment or transaction problem to the right support team.

With an ISO, your business has its own merchant account and MID. A payment facilitator uses a different arrangement: businesses process under the facilitator’s master account. That distinction affects how your account is set up and who your agreement names. ISO onboarding involves separate account setup and underwriting, so expect more paperwork than a quick sign-up under a facilitator.

What an ISO means for your costs

An ISO is a sales channel, not a standard fee on your processing bill. Your costs still include interchange paid to the issuing bank, network fees and your processor’s markup. Only the markup is negotiable. The research does not establish a standard ISO fee, a universal merchant price or a single statement line that identifies an ISO’s compensation.

Pricing and agreement terms can be negotiated, including in light of your transaction volume. Ask for the full pricing schedule and compare its charges with your merchant statement. For example, if your agreement lists a monthly service charge, check whether that same charge appears on the bill and whether its amount matches. Do not assume every fee is an ISO fee or that an ISO’s services make a particular price cheaper.

What to compare before signing

Compare the written rates, contract terms, account setup and included services. An ISO can offer equipment, integrations or support alongside processing, but those services do not replace a clear breakdown of your processing costs. Confirm which company handles transactions, which company services your account, and whether equipment or software carries a separate charge.

For a growing business or one with complex payment needs, an ISO’s separate account and service options may fit better than processing under a shared master account. The tradeoff is a more involved setup and underwriting process. Your choice should reflect the account structure and support you need, not a sales claim that the ISO itself guarantees lower fees.

What you can actually change

1. 01
   Request the full schedule. Get every rate, monthly charge, equipment cost and contract term in writing before you sign.
2. 02
   Match charges to your bill. Compare the agreement with your monthly statement. Identify recurring charges and confirm each amount against the written terms.
3. 03
   Name each responsible party. Confirm who provides the merchant account, processes transactions, supplies equipment and handles account support.

Frequently asked questions