AFD Pre-Auth (Automated Fuel Dispenser)

AFD stands for Automated Fuel Dispenser. An AFD pre-auth is the pre-authorisation hold placed by a pay-at-pump gas station terminal before the cardholder begins fueling, because the pump does not know how much fuel the cardholder will pump until the transaction is complete.

Visa's AFD policy sets the current maximum pre-auth amount at $175 for most consumer cards (as of April 2026; Visa periodically updates this). Prior to 2018, the limit was $1. Visa updated the policy to $125 in 2018 and again to $175 in subsequent updates. Mastercard has similar rules. The exact hold amount varies by station and terminal setup.

The hold mechanics differ between credit and debit:

Credit card: A $175 hold reduces available credit by $175 until settlement. Once the pump stops and the actual amount is known (e.g., $52), the merchant sends the final settlement. The issuer typically releases the excess hold within 1-3 business days, sometimes faster. Credit limit is the only thing affected; the cardholder's bank balance is untouched.

Debit card: A $175 hold removes $175 from available checking account funds. The actual debit may settle the next business day at $52, but the bank may continue holding the excess $123 for up to 7 business days. During that window, if other transactions post against the account, they may overdraft against the held funds even though the actual transaction was only $52. Banks may charge overdraft fees for each resulting negative-balance transaction.

Workaround: Pay the cashier inside with cash or exact dollar amount to avoid the AFD hold entirely. Or use a credit card at the pump. Alternatively, some stations allow PIN-debit transactions at the pump that trigger the actual settled amount immediately, though this varies by terminal.

Fraud note: Gas pumps are the most prevalent location for card skimmers according to FBI data. Combined with the pre-auth hold disadvantage, pump debit use carries both a fraud risk and a cash-flow risk that credit card use does not.