Customers are able to pay an Ameren bill online by visiting the main company website and clicking on the Pay Online Now button. Online payment requires a customer-specific user ID and password to be registered and entered.
As of 2015, customers have the option of paying online with a credit or debit card or an electronic check. The first two methods incur a convenience fee, while the latter is fee-free. Electronic checks require a customer-specific login and password. Customers can also settle bills by phone with a credit or debit card or an electronic check. A convenience fee is added to each transaction made by phone.