Processing fees
What is processing fees?
Processing fees are the charges a merchant pays to accept card payments, covering the cost of moving each transaction through the card networks and settling the funds into the merchant's account. Every fee bundles three parts: interchange paid to the cardholder's issuing bank, assessment or scheme fees paid to the card network, and the 's own markup.
Because the network and the issuing bank set two of those three parts, a merchant can't remove processing fees entirely. Cost control comes down to the portion the processor charges and the mix of transactions that drives the rest, which is why two businesses accepting the same card volume can pay very different effective rates.
Key facts
- Formula: Processing fee = interchange + assessment/scheme fees + processor markup
- Also known as: merchant fees, or the (MDR) when the total is expressed as a single blended percentage per transaction
- Components: (to the issuing bank), scheme fees (to the ), and the processor's markup
- Applies to: any merchant accepting card payments, whether online or in person
How processing fees are calculated
Processing fees stack rather than blend at the source. Interchange is set by the card network and paid to the issuing bank, scheme fees go to the network itself, and the payment processor adds its markup on top. The pricing model then determines how those layers reach the merchant's statement:
- Flat-rate: one blended percentage, sometimes plus a fixed per-transaction amount, applied to every card. It's simple to read but hides the underlying interchange split.
- Interchange-plus: and scheme fees pass through at cost, and the processor adds a separately stated markup, so the negotiable part is visible.
- Tiered: transactions are sorted into qualified, mid-qualified, and non-qualified buckets, each billed a different rate depending on how the card and channel qualify.
What affects processing fees
Two of the three layers sit outside the merchant's control, so the effective rate moves with the transaction mix:
- Card type: rewards and commercial cards carry higher interchange than standard consumer debit.
- Channel: card-present transactions cost less than card-not-present ones, because in-person acceptance carries lower fraud risk.
- Merchant category code: the four-digit groups a business by industry, and networks use it to set interchange and underwriting risk.
- Region: interchange and scheme economics differ by country and regulation, so the same card costs a different amount to accept in different markets.
- Volume and risk: higher-volume merchants with low rates can negotiate a smaller processor markup.
How to reduce processing fees
A merchant can't touch interchange or scheme fees directly, so cost control focuses on the markup and the transaction mix.
- Interchange-plus pricing exposes the processor markup as its own line, which makes it the part open to negotiation.
- Accurate merchant category code classification keeps a business in the interchange category the networks intend for it, avoiding downgrades to more expensive rates.
- Shifting volume toward lower-cost methods, such as debit or local schemes, reduces the interchange share of each sale.
- Low fraud and chargeback rates avoid penalty fees and the risk-based markup increases that processors apply to disputed portfolios.
