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Property Taxes, Part 2: why did my taxes go up?

Generally, when property valuations increase, property tax rates decrease to maintain revenue neutrality (excluding new growth). This revenue-neutral rate is called the certified tax rate. This rate is then applied to all properties, including new residential and commercial developments. Increased valuations due to new developments do not reduce the property tax rate

Despite Truth-in-Taxation’s ratcheting down of property tax rates as valuations of existing properties increase, sometimes property owners see a higher property tax bill. Sometimes, property owners see a decrease. There are several reasons why.

Property valuations increase faster in one area than in other areas
Property valuations can increase faster in some areas than in other areas for two reasons. First, properties are periodically reassessed. As a result, properties that were recently reassessed by the county will typically experience larger valuation increases than properties that were not reassessed recently. Second, real estate market demand may push up the value of some properties faster than others.

Using yesterday’s example, if existing property valuations increase 20% county-wide, the tax rate is reduced by 16.7% to maintain revenue neutrality (excluding new growth). However, properties that increased faster than the county (and/or school district/city/special service district) average will experience an increase in property taxes while others will experience a decrease. In the end, it all works out because other parts of the county and school district will be reassessed in following years and their taxes will increase while everyone else’s decreases.

Local governments issue or retire voter approved general obligation bonds
A local government’s property tax rate is a sum of several tax levies. In most cases, one of the property tax levies is used to pay off voter-approved general obligation (GO) bonds. These debt service levies are NOT subject to Truth-in-Taxation. Therefore, if a local government issues a voter approved bond, property taxes may increase even though the local government’s other levies were reduced by the Truth-in-Taxation process.

When a local government retires a GO bond, the debt service levy is reduced (unless the local government issues new debt).

Local government raises taxes
Truth-in-Taxation does not prevent local governments from raising taxes. Once the certified tax rate has been calculated by the Utah State Tax Commission, local governments have the option of exceeding the certified tax rate. When local governments decide to exceed the certified tax rate, they must go through the Truth-in-Taxation notification and hearing process. Annually, about half of school districts increase their rates above the certified tax rate, and about 20% of counties and 5% to 10% of cities increase their rates above the certified tax rate.


Certified tax rates do not include adjustments for inflation. Therefore, local governments occasionally increase property tax rates to recoup inflationary losses. Sometimes, the proposed increases do more than offset inflation, sometimes less.

Local government imposes judgment levy
Occasionally, large taxpayers successfully appeal their property valuations, just as home owners successfully appeal their property valuations. In some cases, these large taxpayer appeals take several years to resolve. When that happens, the local governments must refund the property tax overpayment from previous years. In such situations, local governments have the option of imposing a one-time judgment levy to cover the costs of the tax refund. In these cases, property taxes may increase even though Truth-in-Taxation has reduced other levies.

Residential appeals, on the other hand, are generally resolved quickly, which means that refunds of multi-year overpayments are not an issue for residences.

Other factors: BOE adjustments, delinquent taxpayers, centrally assessed properties
Just as local governments are allowed to impose one-time judgment levies to cover costs of refunding previous years’ overpayments to large taxpayers, tax rates are increased when any property owner successfully appeal current-year property taxes. This adjustment is called the board-of-equalization (BOE) adjustment. This increases the certified tax rate.

Every year, some property owners do not pay their property taxes, usually due to financial hardships. (Note: property owners are required to pay their taxes even when they appeal.) When this happens, tax rates increase to hold local governments harmless. Local governments actually benefit from delinquent property owners since the tax rate increases when taxes are delinquent but tax rates do not decrease when delinquent taxes are eventually paid (which is always the case since such properties are sold by the county and back taxes are collected at that point.)

BOE (3-year moving average) and collection (5-year moving average) adjustments do not change much from year to year, especially in large taxing entities like school districts and counties. However, in small cities/towns and special service districts, a couple of delinquent taxpayers or successful property tax appeals can increase the certified tax rate for all taxpayers.

We’ll talk about centrally assessed property in a later post.


Thank you for these last two posts. This is a wonderful public service that helps demystify the meaning behind the changes specified on my property tax notice.

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