Rate Breakdown

Property taxes in Adams County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Adams County

In Adams County, property taxes are calculated by applying the county’s millage rate to the assessed value of each parcel. The Colorado Department of Revenue first determines a property's market value, typically based on recent sales of comparable homes or a qualified appraisal. The county assessor then confirms this market value and applies a uniform assessment ratio of 7.15% (the state-mandated “assessment rate”) to arrive at the taxable value.

Once the taxable value is set, the county combines all applicable millage rates—these are expressed in “mills,” where one mill equals $1 of tax per $1,000 of taxable value. Millage rates come from several sources: the Adams County government, the state school district, local fire protection districts, water and sanitation districts, and any special districts that serve the property. The total millage rate for a typical residential property currently hovers around 110–125 mills, but it can vary depending on the exact location within the county.

The formula is straightforward:

• Taxable Value = Market Value × 7.15%
• Annual Tax Due = Taxable Value × (Total Millage Rate ÷ 1,000)

Understanding each component helps homeowners anticipate changes when property values rise or when local districts adjust their rates.

Available Exemptions

Colorado offers several exemptions that can reduce the taxable value of your property, thereby lowering your tax bill. In Adams County, the most common exemptions include:

• Homestead Exemption – Grants a $2,500 reduction in taxable value for owner‑occupied residences. An additional $2,500 deduction applies if the property is the primary residence of a senior (65+) or a disabled person.
• Senior Citizen Exemption – Residents age 65 or older who meet income limits may receive an extra $2,000 reduction on top of the basic homestead exemption.
• Disability Exemption – Homeowners with a qualifying disability can claim the $2,500 additional homestead reduction, regardless of age.
• Veteran Exemption – Qualified disabled veterans can receive a $2,000 reduction, plus an additional $1,000 for each 10% of permanent service‑connected disability, up to a maximum of $22,000.

All exemptions are applied automatically when you file a regular property tax return, but you must certify eligibility each year. Missing a deadline can forfeit the exemption for that tax year.

Payment Schedule & Deadlines

Adams County follows Colorado’s statewide payment calendar, which provides two primary installment options:

• Quarterly Payments – Due on February 1, May 1, August 1, and November 1. Paying the full amount by the final due date (November 1) eliminates interest charges.
• Semi‑Annual Payments – Some taxpayers choose to pay in two larger installments, due February 1 and August 1. The total amount due at each payment is 50% of the annual tax bill.

If a payment is missed or only a partial amount is submitted, a 6% annual interest (prorated daily) is assessed on the delinquent balance. After 30 days, a $10 delinquency notice fee is added; continued non‑payment can result in tax lien placement, and ultimately, the county may initiate a tax sale of the property.

Appealing Your Assessment

If you believe your property’s assessed value is inaccurate, you have the right to appeal to the Adams County Board of Assessment Appeals (BAA). Follow these steps:

• Gather Evidence – Compile recent comparable sales, an independent appraisal, or property condition documentation.
• File a Notice of Appeal – Submit the form (available on the Adams County Assessor’s website) within 30 days of the notice of valuation.
• Prepare for the Hearing – Present your evidence at the BAA hearing, which is typically scheduled within 60 days of filing.
• Receive a Decision – The board issues a written decision. If you disagree, you may further appeal to the Colorado Board of Tax Appeals within 30 days of the BAA decision.

Timely action and thorough documentation are key; many successful appeals result from clear, comparable market data that demonstrates the assessed value is higher than the property’s true worth.