How do you calculate assessed value from an assessment ratio?

Assessed value equals market value multiplied by the assessment ratio. A $400,000 market figure at a 40 percent ratio prints as $160,000 assessed. That is a labeled example of the formula, not a reading of one county's current roll.

Does a lower assessment ratio lower my property taxes?

A lower assessment ratio does not automatically mean a lower bill. Millage is often set higher when the printed share of market is smaller. The yearly tax still follows assessed or taxable value times the local rate, not the ratio standing alone.

What Is an Assessment Ratio on a Property Tax Roll? | FairAppeal

Q: What is an assessment ratio on a property tax roll?

An assessment ratio is the fraction of market value a county prints as assessed value. Assessed value equals market value times that ratio. Some states print the full market figure. Others print a legal percentage and set millage against that smaller number.

On the notice

An assessment ratio is the fraction that turns a market figure into the assessed figure printed on the roll. Assessed value equals market value times that ratio. A town that assesses at forty percent is not saying the house is cheap. The county is applying a statutory fraction before millage runs.

Look up if you are overpaying.

How is assessed value calculated from an assessment ratio?

The formula is assessed value = market value × assessment ratio. The IAAO glossary treats that fraction as the relationship an assessed value bears to market. Some states print 100 percent. Others print a smaller legal share and raise the rate to match.

Example: a $400,000 market figure × 40% = $160,000 assessed. That 40 percent walkthrough is an example, not a claim about one county's 2026 roll.

Does a lower assessment ratio mean a lower property tax bill?

Not by itself. A 40 percent ratio with a higher millage can produce the same bill as a 100 percent ratio with a lower millage. A property tax appeal is aimed at the assessed number, not at rewriting the ratio. The property tax glossary and the assessed value page keep the fraction and the rate in separate drawers. There are no upfront costs with Fair Appeal, and FairAppeal handles the entire appeal on your behalf when a filing goes forward.