In this article
You reduce payment processing fees in two moves: first you pay less margin, by choosing the pricing model that fits your volume and negotiating the processor's markup, and then you pay less wholesale cost, by changing which cards you take, how you take them and what data you send with each transaction. The order matters, because a saving on the wholesale cost only reaches you if your pricing model passes that cost through.
A card fee is three fees stacked together. Interchange goes to the bank that issued the customer's card, an assessment goes to the card network, and the rest is the price of the service your processor provides: the terminal or gateway, the risk it carries on your account, the settlement into your bank and the support behind it. Only the last part is negotiable in the ordinary sense. The first two are set by schedules you cannot bargain with, but you can influence which line of the schedule your transactions fall on.
The whole article uses one worked example: a single month of card sales, $80,000 across 1,000 transactions, priced under four models and then improved with three levers. Every rate in the example is illustrative, apart from the debit interchange cap of the United States, which is taken from the Federal Reserve's Regulation II. Card rules and surcharging law differ by country and by state, so the legal points are stated only for the jurisdictions named. This is general information, not legal advice.
Worked example with illustrative rates: $80,000 of card sales in one month, 1,000 transactions, four card types. Your own rates will differ.
What is a payment processing fee made of?
A payment processing fee is made of three parts: interchange paid to the bank that issued the card, an assessment paid to the card network, and a markup kept by the processor or acquirer that serves the business. On most transactions interchange is the largest of the three, which is why two businesses with the same processor can pay very different totals.
Interchange is set by the card networks in published schedules, and in some places capped by law. It varies with the kind of card (debit or credit, consumer or commercial, basic or rewards), with the way the card was used (present at a terminal, or typed in online or over the phone) and sometimes with the type of business. The assessment, also called a scheme fee or network fee, is a much smaller charge that pays for the network itself. Interchange and assessments together are the wholesale cost: every processor pays them at the same rates for the same transaction.
The markup is what remains, and it is what you are buying. A processor underwrites your account, takes the first loss if you cannot cover a refund or a dispute, maintains the equipment or the gateway, meets the security standards of the card industry and moves the money to your bank. That work has a price, and the question is not whether to pay it but whether you can see it.
| Part of the fee | Who receives it | Who sets it | Can you change it? |
|---|---|---|---|
| Interchange | The bank that issued the card | The card network, or a legal cap | Not the rate, but which rate applies |
| Assessment or scheme fee | The card network | The card network | No |
| Processor markup | The processor or acquirer | Your contract | Yes, by model and by negotiation |
| Incidental fees | The processor or acquirer | Your contract | Yes, line by line |
Incidental fees are the monthly, annual and per-event charges around the transactions: a statement fee, a gateway fee, a compliance fee, a fee for each dispute, a minimum monthly bill. They belong in the calculation of what you really pay.
How do you compute your effective rate?
Your effective rate is the total of every fee charged in a month divided by the total card sales of that month. If a business paid $1,798 in fees on $80,000 of card sales, its effective rate is 1,798 divided by 80,000, which is 2.25% when rounded to two decimals.
The effective rate is the number that lets you compare two offers, because a headline rate may cover only one tier of cards, or exclude the per-transaction fee, or ignore a monthly charge.
- Find the gross card salesTake the total submitted for the month before refunds and before fees. Refunds usually do not return the fee, so sales net of refunds would understate your volume and overstate your rate.
- Add every fee, wherever it is takenSome processors deduct fees from each daily deposit, others bill once at the end of the month, and some do both. Add the transaction fees, the monthly and annual charges for the month, dispute fees and any minimum.
- Divide fees by salesThe result is the effective rate. Keep it in a spreadsheet, one line per month, so a change shows up as soon as it happens.
- Separate wholesale cost from markupIf the statement lists interchange and assessments, add them up and subtract them from the total: what remains is what the processor kept. If it does not list them, you are on a blended model and can only estimate the split.
- Count the transactions and the average saleDivide sales by the number of transactions. A fixed fee per transaction weighs heavily on a small average sale and hardly at all on a large one, and that decides which pricing model suits you.
In the European Union the split is yours by right. Regulation (EU) 2015/751 on interchange fees requires the acquirer to give the payee, for each card transaction, the amount of the charges with the merchant service charge and the interchange fee shown separately; the contract may provide for that information to be given periodically, at least once a month. A business in the Union that cannot see its interchange on a statement can ask for it.
Which pricing model costs the least?
Interchange-plus and subscription pricing usually cost the least for an established business, because both charge the wholesale cost at its true amount and add a visible margin, while flat-rate and tiered pricing blend the two. Flat-rate pricing can still be the right choice for a small or new business, where its simplicity and the absence of monthly fees are worth more than the margin.
The four models differ in how the markup is expressed.
- Flat rate: one percentage and one fixed fee for every transaction, whatever the card. The processor absorbs the difference between cheap and costly cards, and prices that risk into the rate.
- Interchange-plus, also called cost-plus or interchange-plus-plus: the wholesale cost is passed through line by line, and the processor adds a fixed percentage and a fixed fee per transaction.
- Tiered: the processor sorts each transaction into a few buckets, often called qualified, mid-qualified and non-qualified, each with its own rate. The processor decides which cards go in which bucket.
- Subscription, also called membership pricing: the wholesale cost is passed through, and the processor charges a monthly fee and a small fixed amount per transaction, with no percentage.
To compare them, take one month of sales with a stated mix of cards. The interchange rates below are illustrative, except the first line, which applies the cap that the Federal Reserve's Regulation II sets for debit cards of large issuers in the United States: 21 cents plus 0.05% of the transaction, plus 1 cent for an issuer that meets the fraud-prevention standards.
| Card type in the month | Transactions and sales | Interchange assumed | Interchange cost |
|---|---|---|---|
| Regulated debit, card present | 300 for $18,000 | $0.22 + 0.05% | $75 |
| Consumer credit, card present | 400 for $32,000 | 1.60% + $0.10 | $552 |
| Consumer credit, card not present | 200 for $18,000 | 1.90% + $0.10 | $362 |
| Business credit, card not present | 100 for $12,000 | 2.60% + $0.10 | $322 |
| Total | 1,000 for $80,000 | $1,311 |
Add illustrative network assessments of 0.14% of sales plus $0.02 per transaction, which come to $132, and the wholesale cost of the month is $1,443, or 1.80% of sales. That amount is the same under every model. What changes is the margin on top, computed here from four illustrative offers: a flat rate of 2.90% plus $0.30; interchange-plus at 0.30% plus $0.10 with a $15 monthly fee; three tiers at 1.79%, 2.49% and 3.29%, each with $0.20 per transaction and a $10 monthly fee; and a subscription of $99 a month plus $0.08 per transaction.
Worked example. Each total includes the $1,443 of wholesale cost; the rest is processor margin: $1,177 flat rate, $505 tiered, $355 interchange-plus, $179 subscription.
The chart does not mean that a flat rate is a poor product. It means that this business, with 30% of its transactions on low-cost debit and a steady $80,000 a month, has outgrown it. The flat rate charges $612 on the debit sales whose interchange is $75. A business with $5,000 of monthly sales would see the opposite: the $99 subscription alone would cost it close to 2% of sales before any wholesale cost. Between the subscription and the interchange-plus offer of this example, the two cost the same at about $25,800 of monthly sales with an $80 average sale; below that the percentage markup is cheaper, above it the monthly fee is.
How do you negotiate the processor's markup?
You negotiate the processor's markup by asking for a quote in interchange-plus form, with the percentage, the per-transaction fee and every recurring fee written out, and by comparing that quote with your current effective margin. Volume, a low dispute rate and a low-risk business type are what earn a lower markup, so bring twelve months of statements.
Start from the margin you computed, not from the rate you were quoted. In the example the interchange-plus account pays $355 of margin on $80,000, which is 0.44% of sales once the per-transaction and monthly fees are counted, against a headline markup of 0.30%. A request to move the percentage from 0.30% to 0.20% is worth $80 a month here. A request to drop a $15 monthly fee is worth $15. Knowing which is which keeps the conversation on the items that matter.
Then read the contract around the rate. Four clauses decide whether a good rate stays good: the length of the term and how it renews; the fee for ending early; whether the processor may change the markup on notice, as opposed to passing through a change in interchange; and the terms of any equipment lease, which often runs separately from the processing agreement.
Which levers reduce the interchange itself?
Four levers reduce interchange: taking the card in person instead of keyed, sending fuller transaction data on business cards, routing debit over the least costly network available, and settling transactions promptly. None of them changes the published schedule; each moves a transaction to a cheaper line of it.
Card present against card not present. Networks price a transaction read from a chip or a contactless tap lower than one typed into a form, because fraud is lower when the card is physically there. A business that keys in card numbers taken over the phone while the customer stands at the counter, or that sends an online payment link to a customer who is in the room, pays the higher line for no reason. Where a sale happens in person, take it at the terminal.
Data on business cards. Commercial and purchasing cards are the most expensive to accept, and the networks offer lower interchange when the transaction carries extra information: a tax amount, a customer reference or purchase order number, and for the most detailed level a description of each line. The industry calls these data levels two and three. A gateway that sends them automatically from your invoice is a setting to ask your processor about, and it matters most to a business that sells to other businesses.
Debit routing. In the United States, Regulation II requires that a debit card can be processed over at least two unaffiliated networks, and it bars issuers and networks from inhibiting a merchant's ability to direct the routing of a debit transaction. Processors often offer least-cost routing as a feature; ask whether yours applies it, and on which channels.
Clean, prompt settlement. Transactions that are authorised and then settled late, settled for a different amount, or submitted without an address check online can be downgraded to a costlier category. Closing the batch every day and matching the settled amount to the authorised one avoids most downgrades.
The same reasoning applies to disputes. Each chargeback carries a fee and usually the loss of the sale, and a high dispute ratio moves a business into a costlier risk category or a monitoring programme. Clear billing descriptors, quick refunds and proof of delivery keep the ratio down.
| Lever on the example month | What changes | Monthly saving |
|---|---|---|
| Fuller data on business cards | $12,000 moves from 2.60% to an illustrative 1.90% | $84 |
| 100 credit sales paid by debit instead | $8,000 moves from 1.60% + $0.10 to $0.22 + 0.05% | $112 |
| Markup negotiated | 0.30% becomes 0.20% on $80,000 | $80 |
| All three | Fees fall from $1,798 to $1,522 | $276 |
With the three levers the effective rate of the interchange-plus account falls from 2.25% to 1.90%, which is $3,312 over twelve identical months. Two of the three savings come from interchange, and neither would appear on a flat-rate statement.
Can you steer customers to cheaper ways to pay?
You can usually steer customers to a cheaper way to pay by naming your preferred method, placing it first and making it the default, and in many places by offering a discount for it. What you may say and offer depends on the law of your country and on the card network rules that your processor's contract brings with it.
In the European Union, Regulation (EU) 2015/751 prohibits any rule that prevents a payee from steering consumers to the payment instrument the payee prefers, and any rule that prevents a payee from telling payers about interchange fees and merchant service charges. A business in the Union may therefore say plainly that it prefers a debit card or a bank transfer.
Steering works best when it costs the customer nothing. Three practical forms are common: the order of the buttons at checkout, with the preferred method first; a sentence on the invoice that names the preferred method and gives the details needed to use it; and a default on recurring billing that is a bank debit instead of a card.
The debit line of the example shows the size of the prize. On a $50 sale, the Regulation II cap gives interchange of 24.5 cents on a regulated debit card, where the illustrative consumer credit rate of 1.60% plus $0.10 gives 90 cents. The cap does not cover every debit card: the Federal Reserve's rule exempts issuers that, with their affiliates, have assets under $10 billion, along with certain government-administered and prepaid programmes, so some debit cards cost more than the capped figure.
Are surcharges and cash discounts allowed?
Surcharges and cash discounts are allowed in some jurisdictions, restricted in others and prohibited for most consumer cards in the European Union, so the answer has to be checked for the place where you sell. A surcharge adds a fee for paying by card; a discount lowers the price for paying another way; the law often treats the two differently even when the arithmetic is the same.
In the European Union, the second Payment Services Directive, Directive (EU) 2015/2366, states that a payee shall not request charges for the use of payment instruments whose interchange fees are regulated under the interchange fee regulation, nor for the transfers and direct debits covered by the SEPA regulation. Consumer debit and credit cards under four-party schemes are the regulated instruments. For the remaining instruments, any charge may not exceed the direct cost borne by the payee, and each Member State may prohibit or limit charges further, so national law decides. The same directive protects the payee's freedom to offer a reduction for a given instrument.
In the United States the position depends on state law and on network rules about the amount, the notice to customers and the card types concerned; this article does not state those rules because they vary by state and change. Ask your processor for the current requirements for your state and get the answer in writing.
Where a surcharge is lawful, weigh it commercially as well: a fee at the end of a checkout can cost completed sales. A discount for the preferred method often achieves the same shift with less friction, and a minimum card amount, where the rules permit one, addresses fixed fees on very small sales.
When should a large invoice leave the card rails?
A large invoice should leave the card rails when the percentage fee on it exceeds what the customer's convenience, the speed of the card payment or the card's credit period is worth to you. Card fees grow with the amount; a bank transfer usually costs a fixed sum, so the gap widens with every additional thousand.
Take one $12,000 invoice paid with a business credit card on the interchange-plus account of the example. Interchange at 2.60% plus $0.10, assessments at 0.14% plus $0.02 and markup at 0.30% plus $0.10 add up to $365.02. The same invoice at the 2.90% plus $0.30 flat rate costs $348.30, which shows that a flat rate can be the cheaper model for a business whose sales are mostly large commercial cards. Either way, the fee on a single invoice is more than the fixed cost of most domestic bank transfers.
The exchange is not free of cost. A card payment arrives with an authorisation and little chasing; a transfer has to be initiated by the customer, matched to the invoice and checked against the right account details, and the fraud controls around bank details are yours to run. Many businesses settle on a threshold: cards accepted up to a stated invoice amount, bank transfer or direct debit above it, written on the quote before the work starts so that nobody is surprised at the end.
When one large payment has to be divided among several parties, a commission and a referral share for instance, a card fee is charged on the whole amount before anyone is paid, and each onward transfer adds its own cost. A payment router is one alternative for that case: Shaka routes one payment and pays every party their share at the same moment, with the shares agreed and signable before the client pays, and it never holds the funds. It is not a card processor, and it does not replace one for everyday sales.
What should you not do to cut card fees?
Do not cut card fees by breaking the rules that keep your account open, and do not chase a lower rate into a contract that costs more to leave. Five mistakes account for most of the savings that turn into losses.
- Splitting one sale into several smaller transactions, or running a sale through a different business's account. Both breach network rules and can end in a closed account.
- Describing the business as a lower-risk type than it is. The category code drives interchange and risk pricing, and a wrong one found later can lead to a repricing of past transactions or to termination.
- Adding a surcharge without checking the law, the network rules and the contract, or applying one to card types on which it is prohibited.
- Signing a long term with an early termination fee or a non-cancellable equipment lease for a rate that the same contract lets the processor change.
- Removing fraud controls to save a few cents per transaction. Address checks, security codes and strong customer authentication carry small fees and prevent disputes that cost far more.
A sixth mistake is quieter: comparing offers on the headline rate. Two quotes are comparable only when each is applied to your own month of sales, with your card mix and your transaction count, and turned into a total in dollars.
What does a processing fee audit cover?
A processing fee audit covers twelve points, from the effective rate to the contract terms, and takes an afternoon with a year of statements. Done once a year, it catches both the slow rise of small fees and the moment a business has outgrown its pricing model.
- Effective rate for each of the last twelve months, total fees divided by gross card sales.
- Wholesale cost and processor margin separated, in dollars and as a share of sales.
- Pricing model identified, and the same months re-priced under at least one other model.
- Number of transactions and average sale, to weigh per-transaction fees.
- Share of sales by card type: debit, consumer credit, commercial, and present or not present.
- Share of keyed transactions that could have been taken at a terminal.
- Downgraded transactions, with the stated reason for each downgrade.
- Whether enhanced data is sent on business cards.
- Whether least-cost debit routing is applied, where the law provides for it.
- Disputes: count, ratio to transactions, fee for each and outcome.
- Every recurring and incidental fee listed, with what it pays for.
- Contract: term, renewal date, termination fee, notice period for changes and equipment lease.
Bring the result to your processor before asking anyone else for a quote. A processor that sees a client with clean data, a low dispute ratio and a clear request will often adjust the terms, and keeping an account that already works has a value that no rate comparison shows.
