For many SaaS platforms, payments begin as a feature request. Customers want to invoice, collect balances, or accept cards without leaving the system they use to run their business.
From there, the platform has to decide whether it wants to refer customers to a processor as an ISO or bring payments into the product through a PayFac model. That choice shapes merchant onboarding, revenue, the customer experience, and how much responsibility the platform is prepared to take on.
The Difference Between an ISO and a PayFac
An independent sales organization, or ISO, helps merchants access payment processing through an acquiring bank or processor. The ISO may sell the service, refer merchants, and support the relationship, but the processor or acquirer generally owns the merchant-account structure.
A payment facilitator, or PayFac, can onboard businesses as submerchants under its sponsored payment program. This allows a platform to make payment acceptance part of its own product instead of a separate service customers must set up elsewhere.
| Area | ISO Model | PayFac Model |
| Merchant onboarding | The merchant applies through a processor or acquirer | The platform can onboard submerchants within its payment program |
| Customer experience | Payments may feel separate from the software | Payments can be activated within the platform |
| Revenue model | Referral fees or residual revenue | Greater opportunity to participate in payment revenue |
| Platform responsibility | Limited | More oversight for onboarding, risk, support, and compliance |
| Control | Less influence over pricing and workflows | More control over the payments experience |
When an ISO Model Makes Sense
The ISO model works well for platforms that want to offer payment access without building payments deeply into their product. It can be a practical fit when customers are comfortable onboarding with a processor, payment acceptance is an added convenience, or the company wants referral revenue with a lighter operational commitment.
It can also give a company a way to test demand. The platform can connect users with a payment provider without taking on merchant underwriting, transaction monitoring, or much of the support that comes with a payment program.
That lighter model comes with less control. Onboarding and reporting may happen outside the software, and users may need to work with a separate provider when questions arise around funding, disputes, or account decisions.
When a PayFac Model Makes Sense
A PayFac model is a better fit when payments are already part of the platform’s daily workflow.
A field-service platform, for example, may allow contractors to schedule jobs, send invoices, and manage customer records. Allowing those contractors to activate payments and collect balances in the same system keeps a key part of the workflow in one place. The same need can apply to software for healthcare practices, property managers, associations, and marketplaces.
A PayFac model may be worth considering when the platform wants to:
- Make payment activation simple and branded
- Keep customers inside its own software experience
- Build recurring payments revenue
- Offer more consistent reporting and workflows
- Use payment data to improve the product and customer support
The platform also needs clear ownership around submerchant review, risk activity, payment support, and escalation. Those responsibilities sit across the platform, processor, sponsor bank, and payments partner, so the operating model needs to be clear from the outset.
PayFac-as-a-Service Offers a Practical Middle Ground
Building a full PayFac program requires investment in compliance, risk operations, card-network relationships, and program management. PayFac-as-a-Service gives SaaS companies a way to offer a branded payment experience without building every part of that structure internally.
The platform can pair that program with a broader embedded payments strategy while keeping ownership of the product experience, customer support, and internal escalation. Its payments partner can manage key infrastructure and program requirements behind the scenes.
Choose the Model That Fits the Product
Choosing between an ISO and PayFac model comes down to the role payments will play in the product. An ISO can work when payment acceptance supports the software, while a PayFac model gives the platform a more direct role in the customer experience and payment relationship. The best fit depends on how closely the company wants payments tied to its growth strategy.
To explore a PayFac-as-a-Service model for your platform, contact Usio to discuss the right fit for your product and customers.