Collin County Property Tax Estimator
2025 rates for every Collin County city, school district and special district, preloaded. Pick your units, enter your value.
Short answer: Collin County's rate is 0.149343%. A $400,000 homestead in Plano pays about $5,375.48 a year at a combined 1.707713%.
Build your estimate
| Taxing unit | Rate | Exemption | Taxable value | Tax |
|---|
Collin County example
To match it, pick Plano and Plano ISD, then tick Collin County Junior College District, enter $400,000 and choose homestead: yes.
- Collin County $597
- Plano $1,750
- Plano ISD $2,703
- Collin County Junior College District $325
| Unit | Taxable | Rate | Tax |
|---|---|---|---|
| Collin County | $400,000 | 0.149343%$0.149343 per $100 | $597.37 |
| Plano | $400,000 | 0.4376%$0.4376 per $100 | $1,750.40 |
| Plano ISD | $260,000 | 1.03955%$1.03955 per $100 | $2,702.83 |
| Collin County Junior College District | $400,000 | 0.08122%$0.08122 per $100 | $324.88 |
| Total | 1.707713%$1.707713 per $100 | $5,375.48 |
- Appraisal district: Collin Central Appraisal District (Collin CAD)
- Protest deadline: May 15 (next business day if that falls on a weekend), or 30 days after the notice is mailed — whichever is later (Tax Code §41.44). Check your notice.
Questions
What is the Collin County property tax rate?
Collin County's own 2025 rate is 0.149343% ($0.149343 per $100). Cities add 0.2% to 0.725% and school districts 0.85693% to 1.2552%, so your total depends on your address.
How much is property tax on a $400,000 home in Plano?
About $5,375.48 a year for a homestead, at a combined 1.707713% (Collin County, Plano, Plano ISD, Collin County Junior College District), after the $140,000 school homestead exemption and before any local optional exemptions.
What exemptions does the estimator apply?
Only the state school-district homestead exemption: $140,000, or $200,000 if you are 65+ or disabled. County, city and special-district exemptions vary by unit and are not assumed.
Where do I find my exact taxing units in Collin County?
Look up your property on Collin Central Appraisal District (Collin CAD). Your account lists every unit that taxes it, including MUDs and ESDs.