Sheet CO · 2026 rules

Colorado Property Tax Calculator

For Colorado tax year 2026, payable in 2027, residential property has separate assessed bases: school districts use 7.05% of full value, and other local government uses 6.8% after a reduction equal to 10% of the first $700,000. Enter each group’s actual millage to avoid taxing both bases at the combined rate.

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Rules verified Oct 3, 2026 10 primary sources Editorial policy

Estimate your 2026 Colorado bill

Colorado · 2026 residential assessment worksheet Needs inputs

Colorado estimated annual property tax —

Tax — School districts —
Tax — Other local government —
Credits subtracted —
Fixed charges added —

Per month (annual ÷ 12) —

What was applied Enter the assessor’s residential full value from the assessment notice.

Full-value basis before levy-specific assessments —

Taxable value — School districts —

Taxable value — Other local government —

Effective rate on market value —

What this estimate leaves out

Different allowances for different levies need separately approved taxable bases in the prepared levy worksheet. The extra exemption above subtracts the same assessed-dollar amount from every modeled levy.

How Colorado turns value into a tax bill

Colorado statewide rules
Step	Colorado rule	Source
Value	Use the valuation for the assessment year shown on your notice. Exemptions, rate units and levy classifications below must match that same notice.	[1]
Assessment	100% of assessor’s residential full value	[1]
Annual limit	No automatic parcel bill cap is inferred from a limit on a jurisdiction’s total levy.
Exemptions	Other relief is applied only from a recorded approval; the calculator does not decide qualification.
Rate	School districts: local rate — you enter it.School districts from the applicable taxing authority. The rate is not a Census ratio.
Rate	Other local government: local rate — you enter it.Other local government from the applicable taxing authority. The rate is not a Census ratio.

How Colorado reappraises, assesses, exempts and collects residential tax

Colorado revalues real property on a reassessment cycle of two full calendar years⁵. Values reflect the 18-month data period ending just before July 1 of the year preceding the cycle⁵. Assessors mail notices of valuation by May 1 each year⁵. Taxes are paid a year in arrears, so 2025 taxes are paid in 2026⁸.

For tax year 2026, payable in 2027, residential property has two assessed values. School districts tax 7.05% of actual value⁴². Other local governments tax 6.8% of actual value after a reduction of 10% of the first $700,000, with a minimum of $1,000 in assessed value³¹. These rates apply because the State Board of Equalization found statewide value growth at or below five percent⁵. Above five percent the law sets 6.95% for schools⁵. The school rate can also be cut by a correction but never exceed 7.05%⁴. Qualified-senior primary residence property is excluded from these rates⁵.

To protest a value, file with the assessor by June 8⁵. The assessor must mail a written denial by the last regular working day in June⁵. Next, petition the county board of equalization by July 15⁵, which must decide by August 5⁵. You then have 30 days to appeal to the Board of Assessment Appeals or district court, or to request arbitration⁵.

Seniors 65 or older who have owned and lived in their home for 10 consecutive years can exempt 50% of the first $200,000 of actual value⁶. Applications run January 1 to July 15⁶. Veterans with a 100% permanent service-connected disability or individual unemployability get the same 50%-of-$200,000 exemption⁵⁷, applying by July 1⁷. A person or married couple can hold only one exemption⁸. A senior primary residence classification is available in 2025 and 2026 to former senior-exemption recipients who no longer qualify⁹.

The state Property Tax/Rent/Heat (PTC) rebate pays up to $1,178 a year¹⁰ to residents 65 or older, or surviving spouses 58 or older¹⁰. The 2025 income limits are $19,094 single and $25,788 married filing jointly¹⁰. Starting with 2025, claimants with disabilities under 65 use a new process on the income tax return¹⁰. Owners 65 and older can defer property taxes on their home⁸ by applying to the county treasurer between January 1 and April 1⁸.

Taxes can be paid in full by April 30 without interest⁵, or in two halves due the last day of February and June 15⁵. A late first half accrues interest of 1% a month from March 1⁵.

For a $400,000 home, the local branch deduction is $40,000 and taxable assessment is $360,000×6.8%=$24,480. The school branch is $400,000×7.05%=$28,200. Separate levy rates must match these separate bases.

Worked example

Residential full value $800,000. School assessment=$800,000×7.05%=$56,400, at 40 mills=$2,256. Other government reduction=min(10%×$800,000,$70,000)=$70,000; assessment=$730,000×6.8%=$49,640, at 30 mills=$1,489.20. Total $3,745.20.

Colorado worked example
Line	Taxable value	Tax
School districts at 40 mills	$56,400.00	$2,256.00
Other local government at 30 mills	$49,640.00	$1,489.20
Annual total		$3,745.20

Left to your local bill

Senior and disabled-veteran exemptions (50% of the first $200,000 of actual value, one per owner or couple). They are approved by the county assessor and reported on the notice. The worksheet does not apply them automatically.
Qualified-senior primary residence classification (2025 and 2026). It is approved by the county assessor and excluded from the standard 6.8%/7.05% residential formula.
The $1,000 minimum local-government assessed value. It changes the 10% reduction only for actual values below about $16,340 ($1,000 ÷ (90% × 6.8%)).
School and local-government mill levies. These are set by each taxing authority (school district, county, city, special districts) and finalized in December. Get them from the county assessor or treasurer listed in the DPT localities directory, and split them between the two bases.
PTC rebate (up to $1,178), the Disability Assistance Credit, and property tax deferral through the county treasurer, which is a payment deferral rather than a tax reduction. Also local property tax work-off programs run by individual taxing entities.
Delinquent interest of 1% a month on a late installment, or from May 1 on a late full payment, plus special district assessments and fees printed on the treasurer’s bill.

Census context, not a rate

American Community Survey 2020–2024: median owner-occupied value $539,400 (±$2,069), median real-estate taxes $2,602 (±$10). Dividing one by the other gives 0.48% for Colorado. Tables B25077 and B25103; why it is only context.

Sources

bouldercounty.govBoulder County Assessor: Property Tax Calculation, read 2026-10-03.
“Residential—local government 6.25% $0 6.8% 10% of the first $700k in actual value”
jeffco.usJefferson County Assessor: How Property Taxes are Calculated, read 2026-10-03.
“For tax year 2026 (payable in 2027) Residential property is assessed at 7.05% for school districts and at 6.8% for all other local government with a 10% legislative adjustment off the first $700,000 of actual value.”
dpt.colorado.govColorado Division of Property Taxation: Residential Local Government Assessment Rate, read 2026-10-03.
“2026 Residential Local Government Assessment Rate - 6.80% after a 10% reduction of the first $700,000 in actual value.* *with a minimum of $1,000 in assessed value”
dpt.colorado.govColorado Division of Property Taxation: Residential School Assessment Rate, read 2026-10-03.
“2026 Residential School Assessment Rate - 7.05% … Final percentage = 7.05% - correction percentage +/- counterfactual percentage (not to exceed 7.05%).”
leg.colorado.govC.R.S. 39-1-104.2(3)(u)(I)(A), read 2026-10-03.
“For property tax years commencing on or after January 1, 2026, if the state board of equalization determines that the statewide actual value growth is less than or equal to five percent, … (B) For the purpose of a levy imposed by a school district, 6.95 percent of the amount equal to the actual value of the property;”
dpt.colorado.govColorado Division of Property Taxation: Senior Property Tax Exemption, read 2026-10-03.
“Colorado offers a property tax exemption for seniors 65+ who have owned and occupied their primary residence for at least 10 consecutive years prior to Jan. 1 of the application year. The program exempts up to 50% of the first $200,000 of actual value of the home from taxation. … Each year’s application period begins on January 1 and ends July 15.”
dpt.colorado.govColorado Division of Property Taxation: Veteran with a Disability and Gold Star Exemptions, read 2026-10-03.
“Has established a service-connected disability that has been rated by the United States Department of Veterans Affairs as a one hundred percent permanent disability through disability retirement benefits or has been granted individual unemployability status. … Each year’s application period begins on January 1 and ends July 1.”
dpt.colorado.govColorado Division of Property Taxation: Frequently Asked Exemption Questions, read 2026-10-03.
“No, the laws that govern this program only allow a person or a married couple to have one exemption in total. … Colorado residents who are 65 years of age or older and persons called into active military service may defer the payment of property taxes on their residences.”
dpt.colorado.govColorado Division of Property Taxation: Senior Primary Residence Classification, read 2026-10-03.
“A property tax classification is available in 2025 and 2026 for qualifying senior citizens who received the senior exemption in 2020 or later, but are no longer eligible for that program.”
tax.colorado.govColorado Department of Revenue: Property Tax/Rent/Heat Credit, read 2026-10-03.
“The rebate amount can be up to $1,178 a year and you could receive up to a $38 TABOR refund ($19 for single filers). … Income limit for 2025 Single $19,094 Married (Filing Jointly) $25,788”

Bordering jurisdictions

Rules verified October 3, 2026 by the Property Tax Calculator Editorial Team. Report a correction