What fees are associated with the Loan Payment Portal?

When paying via a credit or debit card, the following fees apply:

$0 – $500 payment: $15 fee
$500.01 – $1000 payment: $30 fee
$1000.01 – $1500 payment: $45 fee
$1500.01 – $2000 payment: $60 fee
$2000.01 – $2500 payment: $75