FAIRBANKS, Alaska (AP) — An Alaska mayor is having second thoughts about a voter-imposed ceiling on how much money the borough government can collect from year to year.

Fairbanks North Star Borough Mayor Karl Kassel said budgeting for the future based on a mathematical formula is flawed. No formula can take into account all of the unforeseen circumstances that impact local government, he said.

Kassel’s comments come as the tax cap marks 30 years in effect, the Fairbanks Daily News reported.

Signatures are being collected to put the tax-cap question on the 2018 borough ballot. He likely...