Neb. Rev. St. § 44-8005 (1)

(1) An insurer that fails to pay, deny, or settle a clean claim in accordance with the time periods set forth in subsection (1) of section 44-8004 or to take other required action within the time periods set forth in subsection (2) of section 44-8004 shall pay interest at the rate of twelve percent per annum on the total amount ultimately allowed on the claim, accruing from the date payment was due pursuant to section 44-8004.