No provider is cheapest for every business, so which payment processor has the lowest fees? is a question that only resolves against your own numbers. The largest share of what you pay is set by the card networks and no processor discounts it. What moves is a narrower slice than most quotes imply.

What part of the bill can a processor actually lower?

Interchange goes to the bank that issued your customer’s card. Visa and Mastercard set it and publish their tables openly, so every provider pays the same amount on the same transaction. Network assessments work the same way. Neither is a lever anyone can pull for you.

That leaves two things a provider genuinely controls: its own markup, and the schedule of account fees it bills alongside it. When a comparison is real, it is a comparison of those two. When a comparison is a headline percentage, it is mostly a comparison of how the provider chose to bundle a number that was never theirs to discount.

This is why a straight answer to “who is cheapest” is impossible without your statements. It is also why anyone who gives you one without asking a question first is selling rather than pricing. Our breakdown of what actually sits inside a high risk fee schedule separates the fixed parts from the negotiable ones.

Which payment processor has the lowest fees? It depends on your average ticket

A per-transaction fee and a percentage behave in opposite directions as ticket size changes. On a small average sale, a fixed few cents per transaction dominates and the percentage barely registers. On a large average sale, the fixed piece disappears and the percentage is nearly the whole bill.

So a provider that is genuinely cheapest for a coffee counter running hundreds of small sales a day can be the most expensive option for a business selling a handful of large orders a month, using exactly the same published pricing. Neither business is being treated differently. The arithmetic simply lands somewhere else.

Before you compare anything, work out your own average ticket and your monthly transaction count. Those two numbers decide which half of the quote matters to you.

Does how the card is presented change it?

Yes, and it changes it more than most owners expect. Published interchange is not one number. It varies by card type and by how the card was captured, and a card tapped at a counter, a card keyed in by hand, and a card entered by a customer on a website are three different categories in the networks’ own tables.

A business that is entirely in person and a business that is entirely online can receive identical quotes and see very different statements, because their card mix is different. If you sell both ways, ask what happens to the quoted rate on the side you were not thinking about when you asked.

The fees that ignore your sales entirely

Monthly statement fees, gateway fees, PCI fees, monthly minimums and annual fees do not scale with volume. They are the same in a strong month and a dead one, which makes them easy to wave away when business is good.

For a seasonal business they can quietly reverse the ranking of two quotes. A lower percentage carrying a stack of flat monthly charges can cost more across a full year than a higher percentage with none of them, and the gap widens the more uneven your year is. Ask what the account costs in your worst month, not your best one.

How do you test two quotes without a spreadsheet?

Take one real month of your own processing and run both offers against it.

  • Pull a single recent month of statements, ideally an ordinary one rather than your peak.
  • Note the total volume, the transaction count, and roughly how the sales split between in person, keyed and online.
  • Ask both providers to price that exact month, in writing, with every recurring fee listed.
  • Ask both for the same pricing structure. Interchange plus against a blended flat rate is not a comparison, because a blended number can only be matched to another blended number if two businesses have an identical card mix, and none do.
  • Add the per event costs: what a chargeback costs you, what a retrieval request costs, what happens on a refund.

The gap between two quotes usually turns out to be smaller than the gap between the first quote and what you are paying now. That is worth knowing before you spend a week on the exercise.

When is the lowest fee the wrong thing to optimise?

When your category is hard to place. A business that gets shut off mid season pays more in one lost fortnight than it saves in a year of a slightly better rate, and platforms that onboard instantly are also the platforms that review risk after the fact rather than before. That tradeoff is laid out in aggregator versus dedicated merchant account, and the closure pattern itself in why Stripe and Square close accounts.

If you have already been dropped once, price is genuinely the second question. Stability is the first. Worth asking a prospective provider what happens to your account if your chargeback ratio climbs for one month, and the rest of the questions worth asking before you sign anything.

Frequently asked questions

Is interchange plus always cheaper than a flat rate? Not always, but it is always more visible. Interchange plus shows the published network cost and the provider markup separately, so you can see what you are paying for. A flat rate can work out lower for a business whose card mix happens to sit on the expensive side of the tables, and higher for one that does not.

Why did my rate go up when nothing changed? Your card mix changed even if your prices did not. Rewards cards, corporate cards and keyed transactions carry different published interchange than a basic debit card tapped in person. A fixed markup on a shifting mix still produces a shifting bill.

Should I switch for a small difference? Weigh it against the switching cost. Moving means new hardware or a gateway change, re-testing your checkout, updating recurring billing, and often a month of overlapping fees. A small saving takes a long time to repay that, and a checkout that breaks for two days costs more than either.

Can I ask a provider to match a competitor quote? You can, and many will look at it. Send the full schedule rather than the headline number, because a match on the percentage alone can be undone by the fees underneath it. Get whatever is agreed in the written schedule before signature.

Does being placed as high risk mean I cannot shop on price? No, but it narrows the field to providers who will actually take your category. Compare inside that set rather than against standard account pricing, and if you want a read on where your file sits, tell us what you are processing and what happened with your last account.