Amex OptBlue: what it is and how its pricing works

Amex OptBlue is American Express's program that lets small businesses accept Amex cards through their payment provider, which signs them up and sets their Amex rate. American Express says that with OptBlue, "your provider sets your American Express Rate" just as it does for the other card brands you accept, and that "the rate is set by the provider (not American Express)" (American Express).

That point explains most of what matters. Under OptBlue, your Amex price is a decision your processor makes, so it belongs in your processing quote like any other number. Our guide to American Express merchant fees covers Amex's fee rules and surcharging. This guide sticks to OptBlue itself: who qualifies, how the price gets built, how it compares with dealing with Amex directly, and what to ask before you sign.

What is Amex OptBlue, in plain terms?

It's one of two ways to accept American Express in the US. Amex says eligible small businesses can accept through their payment provider, "which sets the rate for card acceptance," while national and regional businesses, and small businesses that prefer it, can accept directly with American Express (American Express). The provider route is OptBlue.

Under OptBlue, Amex becomes one more card brand handled by the company that already processes your Visa and Mastercard sales. Amex pitches it as one statement, one deposit and one servicing contact for the card brands you accept (American Express). The rulebook changes too. Amex's Merchant Operating Guide says it "is intended for use by Merchants that have entered into a legally binding Agreement with a Merchant Services Provider" (American Express Merchant Operating Guide).

Here's what that looks like day to day:

Who qualifies for Amex OptBlue?

US businesses with estimated annual Amex charge volume under $3 million may be eligible, according to American Express. The test is about Amex volume, not your total sales.

"Estimated annual charge volume" means roughly how much your customers will put on Amex cards in a year. Two examples, with made-up figures:

The boutique is well inside the threshold. The restaurant group is over it, so Amex's direct route is the one to ask about. The threshold is the same for a business anywhere in the US.

Ask your provider to confirm that your type of business can be signed under OptBlue as well. And if your Amex volume is climbing toward $3 million, ask now what happens to your account when it gets there, not after the fact.

How does Amex OptBlue pricing work?

Your provider sets the price you pay. What it pays American Express behind the scenes isn't published for the US.

Canada shows how the pieces fit. Amex's Canadian site publishes the wholesale discount rates and network assessment fees it charges OptBlue participants there, and says the participant "sets the total pricing (rate and fees) that the merchant will pay for accepting American Express Cards" (American Express Canada). So the structure is: Amex charges the provider a wholesale cost, and the provider sets your price on top of it. Those Canadian figures don't apply to US merchants, and we couldn't find a US equivalent on Amex's US merchant pages.

That leaves you with whatever your provider chooses to show you. Providers can present Amex in two broad ways:

Neither is wrong, but the first one lets you see the provider's margin. With the second, you can still compare quotes by working out what Amex costs you as a share of Amex sales. The first approach is how interchange-plus pricing works for Visa and Mastercard.

Take a made-up example. A business runs $6,000 a month on Amex across 60 sales and gets two quotes:

• Quote A: a single Amex rate of 3.10% plus 10 cents a sale. That's $186.00 plus $6.00, or $192.00 a month, an Amex rate of 3.20%.
• Quote B: the provider's Amex cost plus a markup of 0.25% and 10 cents. If the cost on these sales averages 2.40% (an invented figure, since Amex doesn't publish US wholesale rates), that's $144.00 plus $15.00 plus $6.00, or $165.00 a month, about 2.75%.

On these numbers, Quote B saves $27 a month, or $324 a year. Your numbers will differ. The method doesn't: total Amex fees divided by total Amex sales, from each quote, side by side. Our guide to the merchant discount rate shows the same calculation for every card brand.

OptBlue or a direct Amex account: what's the difference?

The difference is who you deal with. With OptBlue, everything runs through your provider. With a direct account, your Amex pricing and rules come from American Express itself.

Amex says the Merchant Regulations for US merchants "are published twice a year, in April and October" (American Express), and it promises direct merchants "competitive pricing opportunities" without publishing the numbers (American Express).

Is OptBlue cheaper than going direct?

Nobody can tell you in general, because Amex doesn't publish US prices for either route. The only honest way to know is to get both in writing and compare total Amex fees against Amex sales.

What we can say is where each route tends to make sense:

• OptBlue suits a small business that wants one statement, one deposit and one point of contact, and whose provider's Amex price holds up when you do the math.
• Direct makes sense if you're over the OptBlue threshold, or you're under it but Amex offers you a better price than your provider and you're happy to manage Amex as a separate relationship.

Put a number on the trade-off before you decide. Say a direct offer comes in 0.20 percentage points below your provider's Amex price, and you run $8,000 a month on Amex. That's $16 a month, or $192 a year. For some owners that's worth a second contract and a second set of paperwork. For others, an hour a month of extra reconciling wipes it out.

Also keep Amex in proportion. Plenty of owners assume it's the most expensive card they take, but premium Visa and Mastercard cards aren't cheap either. Visa's April 18, 2026 schedule lists Visa Signature Preferred at 2.10% + $0.10 in person, and Mastercard's 2026-2027 schedule puts World Elite at 2.30% + $0.10 for its Merit III Base rate, and that's interchange alone. Our guides to Visa interchange rates and Mastercard interchange rates have the full picture.

Should a small business accept Amex at all?

OptBlue only matters if your customers want to pay with Amex in the first place. American Express says its cards can be accepted at "99% of places in the U.S. that accept credit cards" (American Express), so a customer who carries one expects to use it. Amex also says the average transaction on its cards was 58% higher than on cards on other networks (American Express). Those are Amex's figures for card spending overall, not a forecast for your shop.

The practical test is simpler. Count how often customers ask for Amex or leave when you don't take it, then compare the profit on those sales with what Amex would cost you through your provider. Our guide to American Express merchant fees walks through that break-even math.

What should you ask your processor about Amex OptBlue?

These eight questions cover it. Get the answers in writing.

1. Am I accepting Amex through OptBlue, or do I have a direct agreement with American Express?
2. How is my Amex price built: your cost plus a markup, or a single rate you set?
3. Is my markup on Amex the same as on Visa and Mastercard? If not, why?
4. Are there any Amex-specific fees, monthly or per sale, and do they appear as their own lines?
5. Do my Amex sales fund on the same schedule as my other cards?
6. Can my Amex rate change during my agreement, and how much notice will I get?
7. What happens to my account if my Amex volume passes $3 million a year?
8. If I add a credit card surcharge, how do you handle Amex?

That last one matters because Amex's rule works differently from Visa's and Mastercard's. Its Merchant Operating Guide bars merchants from imposing fees on the Card "that are not imposed equally on all Other Payment Products, except for electronic funds transfer, cash, or check" (American Express Merchant Operating Guide). Our surcharging program covers compliance, disclosure and setup across card brands.

Common mistakes with Amex OptBlue

• Assuming Amex sets your OptBlue rate. It doesn't; your provider does.
• Calling Amex about your OptBlue price. Call your provider.
• Comparing processing quotes without the Amex line. Amex can be a real share of your fees, so it belongs in the comparison.
• Reading Amex Canada's wholesale rates as US pricing. They're for Canadian OptBlue participants only.
• Charging a fee on Amex alone. Amex's guide requires fees on its cards to apply equally to other payment products, with the exceptions it lists.
• Never checking your Amex rate on its own. If you only look at one blended rate, you can't tell whether Amex is costing you more than it should.

The next step

Find your last statement and divide your Amex fees by your Amex sales. If you can't find separate Amex lines, or the number surprises you, send the statement to us for a free statement review. We'll separate your Amex, Visa and Mastercard costs and show the effective rate on each, so you know which questions to bring to your provider. If you're comparing processors, start with our payment processing page, and our guide to reading a merchant statement covers the rest of the page.