Merchant Services Fees Explained: What Every Line on Your Statement Actually Means

Meta description: Every merchant services fee explained — interchange, card brand assessments, FANF, APF, NABU, chargeback fees, and processor fees. Exact 2026 rates for US and Canadian merchants. Which fees are negotiable, which aren't, and how to spot markup.

TL;DR: Merchant services fees fall into three buckets: interchange (card-network-set, non-negotiable), assessments (published rates that should pass through at cost), and processor fees (the only category you can negotiate). Most merchants overpay not because interchange is too high but because assessments are marked up and processor fees were never questioned at signup.

Every merchant processing statement has the same structural problem: it lists fees by name without explaining what each one is, who actually set it, or whether the amount matches the published rate.

This glossary covers every major fee category. For each one: what it is, who sets it, what the 2026 rate is for US and Canadian merchants, and whether it's negotiable. If you want to know how to find these fees on your actual statement and verify the math, the companion guide is how to read a merchant processing statement.

What is interchange and who actually sets it?

Interchange is the fee your acquiring bank (your processor's bank) pays to the card-issuing bank every time a cardholder pays you. It's the largest single cost in payment processing and it is set by Visa and Mastercard, not by your processor.

This distinction matters. Your processor cannot lower interchange. No promotional rate, no volume discount, no loyalty arrangement changes what the card networks have decided to charge. If a sales rep says they can get you a "special interchange rate," they are offering a bundled flat rate that hides the cost — a different problem with worse consequences.

Interchange rates are published twice yearly (typically April and October). The rate on any given transaction depends on:

• Card type: Debit, standard credit, rewards credit, or corporate. Rewards and corporate cards carry meaningfully higher interchange than standard debit.
• Transaction method: Card-present (swiped, dipped, tapped) versus card-not-present (online, keyed). CNP transactions carry higher interchange because fraud risk is higher.
• Merchant Category Code (MCC): Your business classification. Some MCCs qualify for preferential rates.
• Data completeness: Missing AVS or CVV data triggers downgrades to higher interchange tiers.

The Durbin Amendment (US merchants only): For US merchants, the Federal Reserve caps regulated debit interchange under the Durbin Amendment to Dodd-Frank at $0.21 + 0.05% of the transaction amount, plus a $0.01 fraud prevention adjustment. In August 2025, a federal court ruled the Federal Reserve had set this cap incorrectly and vacated Regulation II. That ruling is currently stayed pending appeal — the cap remains in effect while litigation proceeds. Do not plan around the cap changing until the appellate court issues a final ruling. Canadian merchants have no equivalent statutory debit cap. Canadian debit interchange is set by Interac or by card-network agreement without federal regulation.

Canadian debit: Interac vs Visa Debit vs Mastercard Debit (Canada only): Canadian debit transactions run on one of three separate networks, and the interchange differs by network. Interac is the dominant network and the cheapest — typically $0.055–$0.07 per transaction with no percentage component, which is why per-item Interac rates appear separately on Canadian statements. Visa Debit (issued by some Canadian banks as a dual-function card) runs on the Visa network and is subject to Visa's debit interchange schedule, not Interac's — typically 0.30–0.50% plus a per-transaction fee, meaningfully higher than Interac. Mastercard Debit similarly runs on the MC network at MC debit interchange. If your Canadian customer pays with a Visa Debit or Mastercard Debit card, you pay Visa or MC debit interchange, not the flat Interac rate. Your statement may not distinguish clearly between them unless you request an itemized card-type breakdown.

Negotiability: None. Interchange is fixed by the card networks.

Operator note: When we pulled a statement for a $363,000/month Canadian B2B distributor, interchange was categorized as a single line item — no per-category detail, no card-type breakdown. If your statement shows one "interchange" total rather than itemized card-type rows, request an itemized statement. Most processors are contractually obligated to provide one on request.

What are card brand assessments, and do rates differ between Canada and the US?

Card brand assessments are percentage-based fees collected by Visa and Mastercard on top of interchange. Every processor pays them. They should pass through to you at the published rate with no markup. On interchange-plus pricing, they appear as exact line items. On flat-rate pricing, they vanish into the bundle.

2026 published assessment rates:

Canadian rates are consistently 3–5 basis points lower than US rates on credit volume assessments. If you are a Canadian merchant and your "card brand fee" line equals 0.14% of Visa credit volume rather than 0.09%, your processor is adding a 5-basis-point spread on top of the Visa-published rate. On $100,000 of monthly Visa credit volume, that's $50/month in hidden markup.

Verification: Multiply your Visa credit volume by 0.09% (Canada) or 0.14% (US). The result should match the "Visa Assessment" or "Card Brand Fee" line on your statement. Repeat for Mastercard using 0.1017% (Canada) or ~0.1312% (US). Any gap between published rate times volume and the billed amount is processor margin.

Negotiability: None at the network level. Processors cannot change published rates. But if your processor is marking them up, that gap is fully negotiable — they are simply presenting their margin as a pass-through.

What is the Visa FANF fee, and does it apply in Canada?

FANF (Fixed Acquirer Network Fee) is a Visa fee charged to your processor based on your merchant category code and how your transactions are submitted.

FANF is a US-only fee. Canadian merchants do not pay FANF. If you are a Canadian merchant and see "FANF" or a line that appears to match this description, contact your processor for written clarification. It may be a proprietary processor fee presented under a familiar Visa name.

For US merchants, FANF is assessed at a per-MID (Merchant ID) flat monthly rate. The tiers depend on whether your transactions are card-present or card-not-present, and your MCC. Rates for card-present merchants start around $2/month for small-volume accounts. For large retail chains processing at multiple locations, FANF can reach several thousand dollars per month because the fee is per-location, not per-dollar of volume.

The per-location structure matters: high-volume merchants with a single location pay the same FANF as a smaller merchant in the same MCC. Expanding to multiple locations multiplies the fee proportionally. Processors are required to pass FANF through to merchants under Visa's acquirer rules. On interchange-plus pricing it should appear as an exact line item, not bundled.

Negotiability: None. FANF is set by Visa for US merchants only.

What are Visa APF and Mastercard NABU, and are they separate from assessments?

Yes, they are separate line items. APF and NABU are small per-transaction fees charged by the networks on top of the percentage-based assessment. They apply in both the US and Canada at the same published rates.

Visa Acquirer Processing Fee (APF):

• $0.0195 per credit card transaction
• $0.0155 per US regulated debit transaction

Mastercard Network Access and Brand Usage (NABU):

• $0.0195 per transaction under $1,000
• $0.0295 per transaction above $1,000

Both are published rates that should pass through at cost. Verify them by counting your transaction volume and multiplying by the published per-transaction amount. On 1,000 Mastercard transactions with an average ticket under $1,000, NABU should be $19.50. If the statement shows $45, ask your processor to account for the difference in writing.

Negotiability: None. These are network-set per-transaction fees.

What is the Mastercard kilobyte fee and why does it appear on its own line?

The Mastercard kilobyte fee (sometimes labeled "MC KB Fee" or "Data Transmission Fee") is a charge for the data Mastercard processes during settlement. It is a per-transaction or per-kilobyte charge, typically $0.001 to $0.003 per transaction.

On 50,000 transactions per month, the kilobyte fee ranges from $50 to $150. On lower volumes, it is negligible. It is a pass-through. On a statement where this line is significantly larger than the per-transaction math supports, ask for the basis of the charge.

Negotiability: None. This is a Mastercard-set fee.

What does the "transaction fee" line actually mean?

"Transaction fee" is the most ambiguous line item on any merchant statement because it means different things depending on your pricing structure.

On interchange-plus pricing: The transaction fee is your processor's per-transaction markup. This is one component of what your processor earns: a flat cents amount per transaction, charged in addition to interchange and assessments. Typical range: $0.05 to $0.15 per transaction. It is the most directly negotiable line on your statement.

On flat-rate pricing: The transaction fee is the cents component of the bundle — the "$0.30" in "2.9% + $0.30." It looks like a per-transaction fee but it combines pass-through costs and processor margin into one number. You cannot separate them.

On tiered pricing: The transaction fee may appear alongside "non-qualified" surcharges for cards that don't fit the base tier — rewards cards, corporate cards, and cards submitted without complete data. The "transaction fee" in this context is often just the qualified tier, while the non-qualified transactions appear on a separate line at a higher rate.

If your statement separately itemizes interchange and assessments, the transaction fee is a processor charge. If it doesn't, the transaction fee is part of a bundle. The former is auditable; the latter isn't. For a section-by-section walkthrough of how to find this on your own statement, see how to read a merchant processing statement.

Negotiability: Yes, on interchange-plus pricing. Processor per-transaction markups are the primary negotiating lever for merchants with high transaction counts. See which merchant account fees are actually negotiable for a full breakdown of what to push on and what processors cannot move.

What are cross-border and international card fees?

Cross-border fees apply when the card used in a transaction was issued in a different country than where the merchant is located. They stack on top of interchange and assessments. They are often invisible on flat-rate statements and partially obscured even on interchange-plus statements.

Visa international fees (2026):

• Visa International Transaction Management Fee (ITMF): $0.0175 per cross-border transaction — a flat per-transaction fee that applies every time the card issuer country differs from the merchant country
• Visa International Service Assessment (ISA): 0.80% on transactions where the card issuer country differs from the merchant country, settled in USD
• Visa International Acquirer Fee (IAF): 0.45% additional, applied in most markets on top of the ISA
• Foreign currency conversion: an additional 0.40% if the transaction is settled in a non-USD currency
• Combined on a standard international Visa card settled in USD: $0.0175 ITMF + 0.80% ISA + 0.45% IAF = $0.0175 per transaction plus 1.25% of volume

Mastercard cross-border fees (2026):

• Cross-Border Assessment: 0.60% when the issuer country differs from the merchant country, settled in USD
• Non-USD settlement: the rate rises to 1.00%
• Currency conversion fee: approximately 0.20% when FX conversion is performed

A US ecommerce merchant accepting a UK Visa credit card pays: standard US interchange + 0.14% Visa assessment + $0.0175 ITMF + 0.80% ISA + 0.45% IAF. On a $100 transaction, the international fees alone are $1.27 before interchange.

What this looks like on your statement: Cross-border fees appear as "International Assessment," "Cross-Border Fee," "ISA," "IAF," "ITMF," or — on flat-rate statements — nowhere. Merchants with ecommerce operations, tourist-heavy retail, or clients in other countries should see these lines. If you accept international cards regularly and these fees are absent from your statement, your processor may be burying them in the base rate.

Negotiability: None. Cross-border fees are network-set. The only way to reduce them is to reduce international card acceptance — not practical for most ecommerce merchants.

What is a chargeback fee, and is it the same as a retrieval fee?

No. They are two distinct fees at two different stages of a dispute.

Retrieval request fee: A retrieval request is the card issuer's first step in a dispute investigation. They ask your processor for documentation of the transaction. Not every retrieval request escalates to a chargeback. Typical retrieval fees: $5 to $25 per request, charged by your processor to cover the administrative work of responding.

Chargeback fee: A chargeback fee is charged when a cardholder formally disputes a transaction and a chargeback is filed with your processor. Stripe charges $15 per chargeback. PayPal charges $20. Traditional merchant account processors typically charge between $20 and $100. The chargeback fee is charged regardless of whether you win or lose the dispute — it covers administrative processing, not the transaction outcome.

The chargeback fee is separate from the disputed amount. A lost $200 chargeback costs you $200 plus the chargeback fee. A won dispute returns the $200 but the chargeback fee is typically non-refundable.

Visa dispute acceptance fee schedule (effective April 1, 2025):

Visa introduced a tiered fee for merchants who accept (do not contest) a dispute, based on how quickly they respond:

Visa also changed the "dispute expired" fee from $1 to $7 (effective the same date) and introduced a new $15 "pre-arbitration expired" fee for cases where the pre-arb response window closes without a reply. These fees apply in both the US and Canada.

The practical rule: if you receive a chargeback notification and decide not to contest it, respond within 10 days to avoid the acceptance fee.

Negotiability: Chargeback fees are processor-set and negotiable at signup. The network-tier acceptance fee schedule (the Visa table above) is not negotiable — it is Visa-imposed.

What are processor-only fees — the lines with no card-network name attached?

These are fees your processor sets without any network mandate. No Visa, no Mastercard, no regulatory body requires them. The amounts vary by processor. Some are legitimate service costs. Others are margin items that went unchallenged because no one asked.

Monthly account fee: A flat monthly charge for maintaining your merchant account. Typical range: $5 to $25. This is a standard operational charge, but the amount is negotiable.

Statement fee: Some processors charge $5 to $15 per month to generate your statement. Often not mentioned during the sales process.

Batch fee: A per-settlement fee charged each time you close your daily batch. Typical range: $0.05 to $0.35. If you settle daily, this compounds quickly on high-transaction-count accounts.

Address Verification Service (AVS) fee: Charged per authorization that includes an AVS check — a query that matches the billing address submitted against the cardholder's file. Typical range: $0.01 to $0.10 per transaction. On 2,000 card-not-present transactions at $0.05/each, that's $100/month that may not appear on the fee comparison you received at signup.

Payment gateway fee: If your processor resells access to a payment gateway for ecommerce or POS integration, you may see a monthly gateway fee ($10 to $25) and a per-transaction gateway fee ($0.05 to $0.10). This fee is charged by the gateway company, not by the card networks, but it often appears on processor statements when the processor bundles gateway access. Verify whether this is the processor's pass-through of the actual gateway cost or a marked-up resale.

PCI non-compliance fee: PCI DSS (Payment Card Industry Data Security Standard) requires annual compliance validation for all merchants accepting card payments. Processors charge merchants who have not completed their annual Self-Assessment Questionnaire (SAQ) a PCI non-compliance fee, typically $15 to $50 per month. This fee disappears immediately upon completing your SAQ through your processor's compliance portal. If you see this on your statement, completing the SAQ is a simple fix that eliminates the recurring charge.

Early termination fee (ETF): Not a recurring fee, but it appears on final statements when a merchant exits a long-term contract. Ranges from $150 flat to a multiple of remaining monthly minimums. Month-to-month accounts have no ETF.

Negotiability: All processor-only fees are negotiable. Monthly fees, batch fees, AVS fees, and gateway fees are set by the processor, not the networks. These are the levers available during signup and at annual review.

How do you tell a pass-through fee from a processor markup?

Every line on your statement is either a pass-through (the processor collects it and forwards it to the network or bank) or a processor markup (the processor keeps it). Most merchants cannot tell the difference because processors don't label them.

Three-step test:

1. Does the fee name match a published card-network rate? Fees named after a Visa or Mastercard published category — interchange, assessment, APF, NABU, ISA, FANF — should be pass-throughs. Verify the amount against the published rate for your country.

2. Is the amount auditable? A pass-through is verifiable: published rate × your volume = the billed amount. If the math produces a different number than what's on your statement, the gap is processor margin.

3. Is there no network name attached? Monthly fees, gateway fees, statement fees, and PCI fees have no Visa or Mastercard basis. They are 100% processor revenue and fully negotiable.

The cleaner version of this test is choosing interchange-plus pricing. Every pass-through appears as a separate line at the exact published rate. The processor's markup appears separately, itemized as a rate and a per-transaction fee. Nothing is bundled. Auditing takes a spreadsheet and twenty minutes.

On flat-rate pricing, the test fails by design. One bundled rate covers everything, so efficiency gains from debit cards (much cheaper interchange than credit) accrue entirely to the processor. You pay the same rate on every transaction regardless of actual cost.

The practical audit step: Request an itemized statement from your processor. Cross-reference every named network fee against the Visa and Mastercard published rate schedule for your country. The gap between published rate × volume and what you were billed is the markup.

Frequently Asked Questions

Can I get interchange rates reduced by processing higher volume?

Not directly. Interchange is fixed by card networks regardless of volume. What higher volume changes is your processor's markup — larger merchants have negotiating leverage to reduce the per-transaction and monthly fees their processor charges. Some tiered pricing models apply slightly different blended rates at higher tiers, but the underlying interchange is unchanged. For a list of which fees respond to negotiation and which don't, see 6 merchant account fees you can negotiate (and 4 you can't).

Why does my effective rate vary month to month even though my pricing hasn't changed?

Your card mix changes. A month with more rewards cards or corporate cards means higher interchange. More debit transactions means lower interchange. The processor's markup is constant; the interchange component fluctuates with your customer base. If your effective rate is climbing without a change in your pricing agreement, request a card-type breakdown and look for a shift toward higher-interchange cards.

Does switching from flat-rate to interchange-plus always lower my rate?

For most merchants processing a mix of card types, yes — savings of 15 to 40 percent are typical because flat-rate pricing bundles in the premium for rewards cards even when the transaction was standard debit. The exception is a merchant whose volume is almost entirely rewards or corporate cards. In that scenario, flat-rate pricing accidentally provides a ceiling on the most expensive card types. An honest processor will model this for you before recommending a switch.

Do the same fee categories apply if I accept American Express?

American Express uses a separate fee structure. Amex charges a merchant discount rate that bundles interchange and the network fee into one number — there is no interchange-plus equivalent for standard Amex card acceptance. Amex OptBlue allows small merchants to accept Amex through their existing processor and does enable itemized billing. Amex rates are generally higher than Visa and Mastercard for equivalent card types.

What is a "downgrade" and why does it cost more?

A downgrade happens when a transaction fails to qualify for the standard interchange rate and gets bumped to a higher-cost tier. Common causes: missing AVS data on a card-not-present transaction, late batch settlement, a corporate or purchasing card submitted without Level 2 data, and certain card types processed on a merchant account not approved for that card category. On tiered pricing, downgrades are opaque — they just cost more. On interchange-plus pricing, each transaction's actual interchange rate appears separately, making downgrades visible.

Interchange rates cited are from published Visa and Mastercard rate tables, April 2026. Visa Canada assessment rate (0.09%) per the Visa Canada Acquiring Network Assessment Fees document (visa.ca). Mastercard Canada card-brand fee (0.1017%) per Fiserv Canada Pass Through Fees disclosure (merchants.fiserv.com/en-ca). Mastercard NABU per-transaction amounts per Mastercard's published interchange and fee schedules. Visa APF per-transaction amounts per Visa's published U.S. acquirer fee schedule. Durbin Amendment debit cap ($0.21 + 0.05% + $0.01) per Federal Reserve Regulation II — vacated by the U.S. District Court for the District of Columbia in August 2025 (Texas First National Bank et al. v. Federal Reserve Board); ruling currently stayed pending appeal. Cap remains in effect until final appellate ruling. Visa International Transaction Management Fee (ITMF, $0.0175), international service assessment (0.80%), and international acquirer fee (0.45%) per Tidal Commerce Visa fee documentation. Mastercard cross-border assessment (0.60%/1.00%) per industry processor disclosures. Visa dispute acceptance fee schedule (effective April 1, 2025) per Chargebacks911. Chargeback processor fee ranges are representative of published US and Canadian processor pricing as of 2026. This is not legal or financial advice.

Kaleb Dickhaut is the founder of ClickWerxs. He works directly with merchants on processing audits, rate negotiations, and payment infrastructure. LinkedIn

Sources

1. Federal Reserve Board, Regulation II debit card interchange fee standard — covered issuers may not receive more than $0.21 plus 0.05% of transaction value, plus a $0.01 fraud-prevention adjustment where eligible. federalreserve.gov
2. Processing rates, fee ranges and effective-rate figures in this post are industry-typical ranges compiled from published network schedules and from accounts reviewed in the ClickWerxs ISO portfolio. They are not quoted rates. Interchange itself is set by Visa and Mastercard on published schedules that change twice yearly; your actual cost depends on card mix, MCC, ticket size and volume.
3. Competitor and platform pricing referenced in this post is taken from each company's published pricing or legal pages as of the date noted in text, and is subject to change without notice. ClickWerxs does not link to competitor websites; references are given in text so they remain verifiable. No affiliation is implied.
4. ClickWerxs ISO portfolio, aggregate observation — patterns described from merchant accounts under ClickWerxs management. Anonymized and reported in aggregate; individual account terms vary. Operator data.

ClickWerxs facilitates merchant account applications and provides ongoing account management as an authorized representative of our banking and processing partners. Approval, rates, and terms are determined by the issuing processor and acquiring bank — ClickWerxs does not guarantee approval for any merchant account application. Processing rates and fee structures cited in this post reflect publicly available industry data and general ranges; your actual rate depends on your industry, volume, and card mix. This post is not legal or financial advice. For a custom quote, see clickwerxs.com/payments/get-a-quote.