What American Express actually does in a payment

American Express is both a card issuer and a payment network — it issues the card to you, sets the rules for how it works, and operates the system that moves money when you swipe or tap. This is different from Visa or Mastercard, which are networks only; they don't issue cards themselves. When you use an American Express card, the transaction flows through American Express's own infrastructure from the moment you hand over the card to the moment the merchant's bank receives the money.

The payment doesn't move when ready. From the time you complete a transaction to the time the merchant actually receives the funds, American Express typically takes two to three business days. During that window, American Express holds the money, verifies the transaction, and settles it with the merchant's bank. You'll see the charge on your statement when ready or within a few hours, but the merchant won't see the deposit for several days.

Key Takeaways

  • American Express operates its own closed payment network, meaning it issues cards, processes transactions, and settles payments without relying on external networks like Visa or Mastercard.
  • Transactions typically settle within two to three business days, though the charge appears on your statement within hours.
  • American Express charges merchants higher fees than Visa or Mastercard, which is why some smaller businesses don't accept American Express.
  • The card issuer, the network, and the settlement system are all American Express, so disputes and fraud claims go directly to American Express rather than through a middleman.
  • American Express offers different card products — consumer cards, business cards, and corporate cards — each with different rewards structures and fee arrangements.

The settlement timeline: when merchants actually get paid

When you use an American Express card at a store or online, the transaction is authorized in real time. The merchant's terminal or payment processor sends the request to American Express, which checks your account, verifies funds, and returns an approval code within seconds. But authorization is not the same as settlement.

Settlement happens later, usually the next business day or the day after. American Express batches all the transactions from a merchant, calculates the total, deducts its processing fee, and deposits the remainder into the merchant's bank account. The merchant sees the deposit two to three business days after the transaction date. If you made a purchase on a Monday, the merchant might not see the money until Wednesday or Thursday.

This delay matters if you're trying to track when money left your account versus when a merchant received it. Your bank shows the charge when ready because American Express has already debited your account. The merchant's bank shows the deposit days later because that's when American Express actually sends the funds.

Why merchants sometimes refuse American Express

American Express charges merchants a higher processing fee than Visa or Mastercard — typically between 2.5% and 3.5% of the transaction amount, compared to 1.5% to 2.5% for Visa or Mastercard. For a $100 purchase, American Express might cost the merchant $3, while Visa might cost $2. On high-volume businesses, that difference adds up quickly.

Smaller merchants — independent coffee shops, local restaurants, boutique retailers — sometimes decline American Express because the fee cuts too deeply into their margin. Larger retailers and chains almost always accept it because they negotiate lower rates and can absorb the cost. Online merchants accept it more often than brick-and-mortar ones because the fee structure is slightly different and the transaction volume justifies the cost.

American Express also requires merchants to meet certain standards for customer service and dispute handling. If a merchant has too many chargebacks or customer complaints, American Express can terminate their ability to accept the card. This is stricter than Visa or Mastercard's requirements, which is another reason some merchants avoid it.

How disputes and chargebacks work with American Express

If you dispute a charge on your American Express card, you contact American Express directly — not your bank, because American Express is both the card issuer and the network. You can file a dispute online, by phone, or through your account portal. American Express typically gives you 120 days from the transaction date to report an issue, though you should report fraud or unauthorized charges as soon as you notice them.

American Express investigates the dispute by requesting documentation from the merchant and reviewing the transaction details. If the merchant can't prove the transaction was legitimate — for example, if you ordered something and it never arrived and the merchant has no shipping confirmation — American Express will credit your account. This process usually takes 30 to 60 days.

The merchant can also dispute American Express's decision by providing additional evidence. If American Express sides with the merchant, the charge stays on your account and you may need to pursue the matter through small claims court or a credit card arbitration process. American Express's dispute process is generally faster than Visa or Mastercard because there's no middleman — American Express makes the decision directly.

American Express card types and their different fee structures

American Express issues several categories of cards, each with different costs and benefits. Consumer cards are the most common — these are personal credit cards with annual fees ranging from $0 to $695 depending on the card. Business cards are designed for sole proprietors and small business owners and typically have annual fees between $95 and $550. Corporate cards are issued to employees of larger companies and usually have no annual fee because the company pays for them.

The rewards structure varies by card type. Consumer cards might offer 1% to 6% cash back or points on different categories of spending. Business cards often offer higher rewards on business-related purchases like office supplies or airfare. Corporate cards are usually tied to the company's preferred vendors and don't offer rewards to individual employees.

Merchants don't see the difference between card types — they pay the same processing fee regardless. But the cardholder experiences different benefits and costs. A consumer paying a $695 annual fee for a premium card expects higher rewards or travel benefits to offset that cost. A business owner using a $95 card expects rewards on business purchases. A corporate employee using a no-fee card is essentially using the company's payment method.

International transactions and currency conversion

When you use an American Express card outside the United States, American Express converts the foreign currency to US dollars. The exchange rate American Express uses is typically close to the mid-market rate — the rate banks use when trading with each other — but American Express adds a markup, usually between 1% and 2%. This markup is how American Express makes money on international transactions.

Some American Express cards offer no foreign transaction fee, meaning you only pay the currency conversion markup. Other cards charge an additional 2% to 3% foreign transaction fee on top of the conversion markup. The card's terms will specify which applies. If you travel frequently, choosing a card with no foreign transaction fee can save hundreds of dollars per year.

The conversion happens at the time the transaction is processed, not at the time you swipe the card. If you use your card in London on a Monday but the transaction doesn't settle until Wednesday, the exchange rate used will be Wednesday's rate, not Monday's. This is another reason settlement timing matters — currency fluctuations between authorization and settlement can change the amount you're charged.

How American Express protects against fraud

American Express uses machine learning and pattern recognition to flag suspicious transactions in real time. If you make a purchase that doesn't match your normal spending pattern — for example, a large purchase in a country you've never visited — American Express may decline the transaction or contact you to verify it. This happens before the transaction is authorized, so the merchant never sees the decline.

You can also set spending limits and transaction alerts in your American Express account. You can receive a text or email notification every time your card is used, or only when transactions exceed a certain amount. You can also temporarily lock your card through the app if you lose it, which prevents any new transactions until you unlock it again.

If your card is used fraudulently, American Express's fraud liability policy typically limits your responsibility to $0 if you report it promptly. You're not responsible for unauthorized charges, though American Express may investigate to determine whether the charge was truly unauthorized or whether you authorized it and later disputed it.

Frequently Asked Questions

Why does my American Express charge show up when ready but the merchant doesn't get paid for days?

American Express debits your account when ready after authorization because it has already verified the funds and approved the transaction. But settlement — when the merchant's bank actually receives the money — happens two to three business days later. American Express holds the funds during this window to verify there are no disputes or fraud claims.

Can I use American Express everywhere Visa is accepted?

No. American Express operates its own network, so merchants must specifically accept American Express. Most large retailers, restaurants, and online merchants accept it, but some smaller businesses don't because of the higher processing fees. Always check before assuming your American Express card will work.

What happens if I dispute a charge and the merchant disagrees?

American Express reviews both your claim and the merchant's response. If the merchant provides proof the transaction was legitimate — like a shipping confirmation or signed receipt — American Express may side with the merchant and the charge stays on your account. You can then pursue the matter through arbitration or small claims court.

Do I pay the same processing fee on every American Express card?

Merchants pay the same processing fee regardless of which American Express card you use. The fee is based on the transaction amount and the merchant's agreement with American Express, not on the card type. However, your personal costs — like annual fees or foreign transaction fees — vary by card.

How long do I have to report fraud on an American Express card?

You have up to 120 days from the transaction date to report a dispute, but you should report fraud as soon as you notice it. The sooner you report it, the faster American Express can investigate and the more likely you'll receive a credit while the investigation is ongoing.