Taxes in Parker
Parker's tax picture combines Colorado's statewide flat income tax with a real, sourced, incorporated-Town sales tax structure -- genuinely higher than unincorporated Highlands Ranch's, since Parker's own municipal government adds its own layer.
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Learn moreColorado's flat, TABOR-variable state income tax
Colorado's flat income tax rate is 4.40% for 2026 -- not fully fixed, since a TABOR-driven refund mechanism can temporarily lower it further in years the state certifies a qualifying revenue surplus. See colorado.js for the full mechanism.
Sales tax: 8.0% combined, with Parker's own 3.0% municipal layer
Parker's own official site confirms an 8.0% combined sales tax rate, of which the Town itself receives 3.0% -- Parker is a home-rule municipality that administers this rate directly. The remaining 5.0% breaks down as 2.90% Colorado state + 1.00% Douglas County + 1.10% special district (RTD 1.0% + SCFD 0.1%), the same base structure that applies in unincorporated Highlands Ranch, with Parker's own 3.0% Town rate layered on top.
Property tax: a research gap disclosed rather than guessed
A precise, current, Parker-specific effective property tax rate (combining Douglas County's, the Town's, and DCSD's own separate mill levies) was not resolved to one verified figure this research pass -- Colorado's own statewide average effective rate (~0.50%) and Douglas County's own average (~0.55%, per colorado.js and highlands-ranch-co.js) are the closest available reference points, but neither is Parker-specific. Confirm the exact combined rate for a specific address directly with the Douglas County Assessor.
Key takeaways
- Colorado's flat state income tax is 4.40% for 2026 (TABOR-variable).
- Parker's combined sales tax rate is 8.0% (2.90% state + 1.00% county + 3.00% Town + 1.10% special district) -- higher than unincorporated Highlands Ranch's 5.0%, since Parker's own Town government adds a municipal layer.
- A precise, Parker-specific combined effective property tax rate was not resolved to one verified figure this research pass -- confirm directly with the Douglas County Assessor for a specific address.
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