What happens when you swipe or tap a credit card
When you hand over a credit card at checkout, a chain of organisations springs into action in seconds. The card reader sends your card number, the purchase amount, and the merchant's details to the card network — Visa, Mastercard, American Express, or Discover. That network routes the request to your card issuer, the bank that issued your card. Your bank checks whether you have available credit and whether the transaction looks legitimate. If approved, the issuer sends a yes back through the network to the merchant's bank, which tells the card reader to approve the sale. You see "approved" on the screen. The whole process takes 10 to 15 seconds.
What you see at that moment is not the final step. The merchant has received authorisation to charge your card, but the money has not moved yet. That happens later, in a process called settlement, which can take one to three business days. During that gap, the transaction is pending on your account — you can see it, but the funds are not yet deducted from your available balance.
Key Takeaways
- Authorization happens in seconds when you swipe or tap, but settlement — when money actually moves — takes one to three business days.
- Four main players handle every transaction: your card issuer, the card network, the merchant's bank, and the merchant's processor.
- Merchants pay a fee for each transaction, typically 1.5 to 3.5 percent of the sale, split among the network, the issuer, and the processor.
- A transaction can be authorised but then declined at settlement if your card issuer detects fraud or if you dispute the charge.
The four organisations involved in every transaction
Your card issuer is the bank or credit union that issued your card. They decide whether to approve the transaction based on your credit limit and their fraud detection rules. They also handle disputes and chargebacks if you report the transaction as fraudulent or unauthorised.
The card network — Visa, Mastercard, American Express, or Discover — owns the infrastructure that routes the transaction. They set the rules for how transactions work, what fees explore, and what happens if something goes wrong. They do not hold your money or the merchant's money; they are the middleman.
The merchant's processor is the company that runs the card reader or payment system at the store or online. They collect the transaction details and send them to the network. They also handle the technical side of settlement, moving money from your issuer to the merchant's bank.
The merchant's bank (also called the acquiring bank) holds the merchant's account. This is where the money lands after settlement. The merchant's bank works with the processor to make sure funds arrive on time.
Why settlement takes days, not seconds
Authorization is when ready because it is just a yes-or-no decision. Settlement is slower because money actually has to move between banks, and banks process these transfers in batches at set times each day. A transaction you make at 3 p.m. on Tuesday might not settle until Thursday morning, depending on when the merchant's processor submits the batch and when the banks process it.
During those one to three days, the transaction shows as pending on your account. Your available credit is reduced by the amount, but the charge is not final. If the merchant cancels the transaction or if your issuer detects fraud, the charge can still be reversed before settlement completes. Once settlement happens, the transaction is final on your end — reversing it after that requires a refund or a chargeback dispute.
The fees merchants pay for each transaction
Every time you use a credit card, the merchant pays a fee. This fee is typically 1.5 to 3.5 percent of the sale amount, though it varies by card type, merchant category, and the processor used. A $100 purchase might cost the merchant $2 to $3.50 in processing fees.
This fee is split three ways. The card network takes a small cut. The merchant's processor takes a cut for running the payment system. The largest share goes to your card issuer as an interchange fee. Interchange is why credit card companies can afford to offer rewards — the interchange fees fund those rewards programs. Debit cards have lower interchange fees, which is why merchants sometimes prefer them and why debit card rewards are usually smaller.
Merchants cannot charge you extra for using a credit card, though they can offer a discount for paying cash or debit. Some merchants absorb the fee as a cost of doing business; others build it into their prices so all customers pay the same amount regardless of payment method.
What happens if a transaction is declined at settlement
A transaction can be authorised at the moment of purchase but then declined during settlement. This happens when your card issuer reviews the transaction later and decides it looks fraudulent, or when you dispute the charge before settlement completes. If this happens, the merchant does not receive the funds, and the charge is reversed on your account.
The merchant is notified of the decline and may contact you to ask for a different payment method. If they do not hear from you, the sale is cancelled. You will not be charged, but you also will not receive the item or service unless you pay another way.
This is different from a chargeback, which happens after settlement. A chargeback is a formal dispute you file with your card issuer after the transaction has already settled and the merchant has already received the money. Your issuer then takes the money back from the merchant's bank and investigates your claim.
How online transactions differ from in-store transactions
Online transactions follow the same four-step process — authorisation, routing, settlement, and funding — but with an extra layer of security. When you enter your card details on a website, the merchant's processor uses encryption to protect your information. Many online merchants also use 3D find, a system that asks you to verify your identity with a code sent to your phone or email before the transaction is authorised.
Online transactions also carry higher fraud risk, so card issuers scrutinise them more closely. A large online purchase from a new merchant or from a different country might trigger a fraud alert, and your issuer might call you or send a text asking you to confirm the charge before authorisation is granted. This extra step protects you but can slow down the purchase.
Settlement for online transactions works the same way as in-store: one to three business days. Some online merchants offer when ready confirmation that your order has been received, but that is not the same as settlement. The charge is still pending until the merchant's processor submits the batch and the banks process it.
Recurring charges and subscription payments
When you sign up for a subscription — a streaming service, gym membership, or software licence — you authorise the merchant to charge your card on a schedule. This is called a recurring transaction or subscription billing. The merchant stores your card details and submits a charge every month (or week, or year, depending on the plan).
Recurring charges follow the same authorisation and settlement process as one-time purchases, but they happen automatically without you swiping or tapping each time. Your card issuer still has to approve each charge, and fraud detection still applies. If your card expires or is reported lost, the recurring charge will fail, and the merchant will usually send you a notice asking for updated payment details.
You can stop a recurring charge by contacting the merchant directly or, in some cases, by disputing the charge with your card issuer. If you dispute a recurring charge, your issuer will investigate and may reverse it, but you are responsible for cancelling the subscription with the merchant to prevent future charges.
Frequently Asked Questions
Why does a pending transaction sometimes disappear and then reappear?
A pending transaction can drop off your account temporarily if the merchant's processor resubmits the batch or if your issuer re-authorises it. This is normal and does not mean the charge was cancelled. The transaction will settle within one to three business days. If it disappears entirely and does not reappear after three days, contact your card issuer to confirm whether settlement completed.
Can I dispute a charge before it settles?
You can contact your card issuer or the merchant before settlement to report an unauthorised or incorrect charge, but the formal dispute process (called a chargeback) only begins after settlement. If you report it early, your issuer may decline the transaction during settlement, which is faster than a chargeback. Either way, the charge will not go through.
What is the difference between a refund and a chargeback?
A refund is when the merchant voluntarily returns your money, usually because you returned an item or cancelled an order. A chargeback is when your card issuer takes the money back from the merchant without the merchant's consent, based on your dispute. Chargebacks are slower and more formal, and merchants can fight them. Always try to get a refund from the merchant first.
Do I have to pay interest on pending transactions?
No. Interest on credit card purchases is calculated based on your statement balance, which is determined after settlement. Pending transactions reduce your available credit but do not accrue interest until the statement closes and the transaction has settled.
Why do some merchants ask for a card number but not the security code?
Phone and mail orders sometimes do not require the security code (the three-digit number on the back) because the merchant is taking down your information manually. This is considered higher risk, so card issuers scrutinise these transactions more closely. Online merchants almost always require the security code as a basic fraud check.