Read the formula
Interchange-plus describes underlying interchange with a processor markup. Applicable network and other charges must also be understood; the markup alone is not the total rate.
YOUR NEXT BUSINESS MOVE
Interchange-plus explained
Understand the difference between the underlying payment costs and the processor markup.
01
Work through the essentials.
Understand the difference between the underlying payment costs and the processor markup.
Use the card mix
Different transactions can have different underlying costs. An estimate should state the sales volume, transaction count, card mix, and channels used.
Compare the whole agreement
Check fixed costs, equipment, subscriptions, transaction fees, and exceptions. A smaller quoted markup does not by itself establish a lower overall bill.
02
Turn the review into a decision.
Use a short written checklist so important details are not lost.
Document the assumptions
Record the information used, what is confirmed, and what still needs an answer. Keep estimates distinct from the final agreement or production behaviour.
Ask for a complete scope
Identify the work, costs, responsibilities, dependencies, and ongoing support. Compare the whole arrangement instead of one attractive feature.
Verify the practical journey
Use an appropriate sample workflow to confirm that the chosen setup can do what the team needs. Financial and provider settings should be approved by the responsible party.
Sources reviewed September 8, 2026: FCAC merchant guidance ↗ . Provider products and terms can change; confirm the current proposal. No affiliation or endorsement is implied.
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Separate transaction activity from the charges that affect your total cost.
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