Code of Alabama — Title 40 (Revenue and Taxation)
Ala. Code § 40-5-9 — Interest on Delinquent Taxes
Notwithstanding Section 40-1-44, all ad valorem taxes becoming delinquent bear interest at the rate of 12 percent per annum. The interest shall be added to and collected as part of the taxes and shall be reported in the manner prescribed by the Comptroller.
Source: official text