Interchange plus pricing is widely considered the most transparent payment processing model for small businesses. According to the provided text, this model stands out because it breaks down costs clearly, allowing business owners to see exactly what they pay for every transaction without the hidden surprises or opaque structures found in tiered or blended pricing.

The transparency of this model is driven by its itemized structure, which includes:

• Base interchange fees: These are the actual rates set by card networks like Visa and Mastercard, passed through directly to the merchant.
• Fixed processor markup: A consistent, predictable fee added by the processor (such as 0.3% to 0.5% plus $0.10 per transaction).
• Pass-through assessments: Small additional fees from card brands that are shown clearly rather than bundled.

For small businesses, this level of detail facilitates straightforward auditing and easier dispute resolution. Industry cost analyses suggest that this visibility can help businesses like single-location restaurants uncover significant annual savings by identifying and reducing indirect expenses. Furthermore, the model empowers merchants to understand how regulatory changes, such as debit fee caps under the Durbin Amendment, impact their specific costs.