By Eric Kuvykin. Reviewed October 17, 2026. This practical guide replaces an earlier general commentary article at the same address.
A merchant’s total processing bill can change even when the quoted percentage stays the same. More online sales, a different card mix, extra services or a new monthly charge may change the result. A fee bridge explains the difference between two periods in recognizable pieces. It is more useful than asking whether a headline rate is “good” without defining what that number includes.
Set a consistent comparison boundary
Choose two complete statement periods and record each period’s sales volume, transaction count and refunds. List every account or location included. Keep terminal rental, software subscriptions and separate service invoices visible, even if they are not printed on the processing statement. The goal is a comparable business cost picture, not a percentage that quietly excludes inconvenient charges.
Calculate a descriptive all-in ratio by dividing the costs you have included by the matching sales volume, and label the calculation precisely. Do not call that ratio interchange. Ask the provider to identify which lines are network-related pass-through charges, which are processor pricing and which are separate services. A clear category is more useful than an unexplained promise of wholesale pricing.
Ask the provider to explain the movement
Create rows for volume, transaction count, payment channel, card mix, pricing changes and one-time adjustments. Ask the provider to show how each contributed to the difference in dollars. Some effects overlap, so request a reconciliation rather than adding incompatible estimates. Keep a separate unresolved line when the explanation does not match the statement total.
For a hypothetical shop whose average ticket falls while transaction count rises, a per-transaction charge can matter more even if monthly sales are unchanged. Another business might see a change after more customers order online. These examples are prompts for an account-specific explanation. They do not establish that either pattern caused a particular merchant’s cost increase.
Use the bridge when requesting a proposal
Ask a prospective provider to price the same documented activity and identify assumptions, exclusions and equipment commitments. Consult Visa’s merchant fee and interchange resources for network context, then request the actual agreement and account-specific schedule from the provider. An advertised rate alone cannot reconstruct the total merchant bill.
Keep the fee bridge with the processing-statement reconciliation checklist. If a new provider also changes reporting, use the data portability test before committing. For owners assembling location-specific records, the New York business guide provides a broader review path. A useful conclusion states what changed, which explanation is supported and which questions remain open, so the next pricing conversation begins with evidence.
