Ala. Code § 41-1-21

Failure to make such payment or remittance in immediately available funds in a timely manner, or failure to provide such evidence of payment or remittance in a timely manner, shall subject the affected taxpayer or obligee to penalty, interest, and loss of applicable discount, as provided by state law for delinquent or deficient tax, fee or obligation payments. If payment is timely made in other than immediately available funds, penalty, interest, and loss of applicable discount shall be added to the amount due from the due date of the tax, fee or obligation payment to the date that funds from the tax, fee, or obligation payment subsequently become available to the state, in accordance with state law for delinquent or deficient tax, fee or obligation payments.