County auditor warns Provo of taxable-value error; officials recommend correcting certified rates now

Utah County officials told the Provo City Council on Sept. 9 that a data-upload error created roughly $500 million in phantom taxable value in Provo, lowering the certified tax rates that were calculated and mailed in preliminary notices. County staff recommended correcting the certified tax rates immediately rather than deferring correction until next year.

Utah County auditor Rod Mann and staff said the error affected valuation inputs that feed the certified tax-rate calculation: an internal change caused values to increase in the upload step, producing a lower calculated tax rate than would otherwise apply. Mann said the county will give municipalities direct access to the data next year and will automate manual steps that contributed to the mistake. "This problem is of our making…we're going to improve on transparency and access to data," he told the council.

Mann and his staff explained the practical effects: correcting the certified tax rate this year restores the revenue that would otherwise be withheld by the error. Councilors were told the impact on the average residential homeowner would be roughly $22 a year under the correction; for a business with $1 million of taxable property the approximate increase would be about $80. County staff said the school district had already voted to fix its certified tax rate now, and county staff prepared corrected certified rates for municipalities.

The county described three procedural remedies: (1) correct certified tax rates now and send corrected valuation notices, with a 45-day window to appeal the valuation change; (2) defer the correction and make municipalities whole in the next year through a single-year adjustment in the certified tax-rate calculation; or (3) allow the difference to be absorbed over the ordinary three-year equalization adjustment process. County staff recommended option (1) — immediate correction — and said corrected notices would be mailed by Sept. 30 so taxpayers receive them before tax bills are calculated and mailed.

Councilors asked about escrow/loan implications, whether residents would effectively pay more in a single year, and how the change would affect city budgeting. The county said corrected notices will be mailed with an extended appeal deadline and that the correction simply restores taxes to their intended level rather than introducing a discretionary tax increase.

Council members indicated a preference to adopt the corrected certified rates at the council’s night meeting so the correction is processed before tax bills are mailed. County staff said they will present a brief, public version of the same presentation at the council night meeting and make the corrected rates available for final review before adoption.