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Interchange Savings Calculator

Published September 30, 2026 · Last reviewed · B2B Pay Hub editorial team · Reviewed by a B2B Pay Hub payments specialist

Estimate the annual gap between what your commercial card volume costs today and what it would cost qualifying at Level 3. Enter monthly card volume, average ticket, commercial card share and your current effective rate.

What this estimates, and what it cannot

This calculator estimates the annual difference between non-qualified and Level 3 interchange on your commercial card volume, using published card-network rate ranges. It is a sizing tool, not a quote. It cannot see your actual downgrade reasons, your processor's markup, or what share of your volume is genuinely fixable - those come from reading your statements.

  • It assumes the basis-point gap published by the card networks, which is a range rather than a single figure.
  • It applies that gap only to the commercial card share you enter, because consumer cards have no Level 3 category.
  • It does not model your processor's markup, which is a separate and often larger finding.
  • It deliberately shows a range. Any tool returning a single exact number is guessing with more confidence than the inputs support.

The inputs, and where to find each one

  • Monthly card volume: total card processing volume from your merchant statement, not total revenue.
  • Average ticket: volume divided by transaction count, both on the statement.
  • Commercial card share: the percentage that is business, corporate or purchasing cards. If you do not know, 50% is a reasonable starting assumption for most B2B sellers and the audit will establish the real figure.
  • Current effective rate: total fees divided by total volume for the month. Not the headline discount rate - that excludes most of what you pay.

How to read the result

The output is an annualized range of what could be recovered if the commercial card volume you entered qualified at Level 3 rather than non-qualified.

Treat it as an order of magnitude. If it returns a number too small to be worth a conversation, that is genuinely useful information and you should stop there.

Educational reference material, not legal, tax or compliance advice. Rules, banking availability and provider policies change; check the linked primary source and the last-reviewed date before relying on anything here.

Cite this resource

Resource
Interchange Savings Calculator
Publisher
B2B Pay Hub · B2B Pay Hub editorial team
Published / updated
September 30, 2026 /
Canonical URL
https://b2bpayhub.com/resources/interchange-savings-calculator

B2B Pay Hub. "Interchange Savings Calculator." Published September 30, 2026; updated September 30, 2026. https://b2bpayhub.com/resources/interchange-savings-calculator

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Related pages in this cluster

Part of the Statement Audits cluster. Reading a merchant statement line by line to separate markup from pass-through and find the downgrades.

QuestionHow do I read a merchant processing statementWork in three passes. First, total every fee for the month and divide by total volume to get your effective rate. Second, separate the statement into interchange (set by the card networks, pass-through), assessments (Visa and Mastercard, also pass-through) and markup (your processor's margin, the only negotiable part). Third, find the commercial card transactions and check which interchange category each settled at.Open Resourceaudit your own statements firstRun the analysis on your own statements before you ask anyone for a quote. Establishes your true effective rate, separates markup from pass-through interchange, and finds the downgrades.Open GuideInformational pillar: what B2B payment processing is and how to evaluate it.B2B payments are not retail payments with bigger numbers. The card types are different, the interchange rules are different, the invoices are larger, and the buyer is an AP department rather than a shopper. Most of what this costs you comes from treating the two as the same thing.Open Resourceour comparison tableWhich rail is cheaper at which invoice size, what each one costs in practice, and where the answer flips. Percentage pricing and flat fees cross over at a point specific to your business.Open Guideinterchange optimization guideWe do not quote a rate before seeing your statements, because a rate quoted without them is a guess dressed up as an offer.Open QuestionLevel 3 data explainedLevel 3 processing is the transmission of detailed line-item data alongside a commercial card transaction so it qualifies for the lowest interchange rate the card networks offer. It requires product codes, item descriptions, quantities, unit prices, freight and duty on top of the Level 2 requirements of sales tax and a purchase order reference. It applies only to commercial, corporate, purchasing and government cards, because consumer cards have no Level 3 category.Open QuestionWhat causes a downgradeA transaction downgrades when it fails to meet the requirements of the interchange category it would otherwise qualify for and settles at a more expensive one instead. Common causes are missing line-item or Level 2 data, freight billed on a separate invoice, settlement outside the required window, a missing purchase order reference, and sales tax left blank rather than flagged exempt. A downgrade produces no error and no alert: the payment succeeds normally and simply costs more.Open ResourceB2B Payments GlossaryPlain definitions of the terms that appear on a merchant statement and in a processing proposal, written so you can read either one without a translator.Open

Read next

  1. 1How do I read a merchant processing statementWork in three passes. First, total every fee for the month and divide by total volume to get your effective rate. Second, separate the statement into interchange (set by the card networks, pass-through), assessments (Visa and Mastercard, also pass-through) and markup (your processor's margin, the only negotiable part). Third, find the commercial card transactions and check which interchange category each settled at.
  2. 2audit your own statements firstRun the analysis on your own statements before you ask anyone for a quote. Establishes your true effective rate, separates markup from pass-through interchange, and finds the downgrades.
  3. 3Informational pillar: what B2B payment processing is and how to evaluate it.B2B payments are not retail payments with bigger numbers. The card types are different, the interchange rules are different, the invoices are larger, and the buyer is an AP department rather than a shopper. Most of what this costs you comes from treating the two as the same thing.

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Educational reference material, not legal, tax or compliance advice. Rules, banking availability and provider policies change; check the linked primary source and the last-reviewed date before relying on anything here.