Collin County Property Tax & Sales Tax

Collin County Tax Rates - At a Glance

Collin County Current Tax Rates Summary

Tax Type	Rate	Notes
Property Tax (combined)	~1.71% of value	No single county rate - the sum of county, city, school district, and the college district. Representative nominal stack; typical effective rate runs lower.
Annual Vehicle (Car) Tax	None	Texas levies no annual value-based vehicle property tax
Sales Tax	8.25%	6.25% state + local portion capped at 2.0%; qualifying groceries exempt
Homestead Exemption	$140,000 school + 10% cap	Plus local percentage homestead exemptions (County 5%, College 20%, Plano 20%); over-65 adds $60,000 school exemption
Due Date	January 31	Delinquent February 1; protest deadline May 15

Collin County Property Tax

Collin County property tax comes in two numbers that are easy to confuse. The county's own adopted rate is $0.149343 per $100 of value for the 2025 tax year - exact, from the county's adopted FY2025-26 tax-rate notice, and unchanged for a 33rd year in a row. But that is only the county government's portion. Your actual bill is the sum of every overlapping taxing unit that covers your parcel: your school district, your city, the county, and the countywide college district (Collin College). Combined, the typical total effective rate in Collin County is about 1.58% of market value - an estimate from Census ACS 2024 5-year data (median real estate taxes paid $7,521 divided by median home value $475,600). Because the mix of taxing units differs from parcel to parcel, there is no single "Collin County rate" for a full bill; the figure below is a worked example.

How a typical Plano bill is built (taxing-unit stack)

School district City County College district

City of Plano / Plano ISD parcel - adopted rates per $100 (2025 tax year)

Taxing unit	Rate /$100	Type
Plano ISD	$1.03955	School
City of Plano	$0.4376	City
Collin County	$0.149343	County
Collin College (community college district)	$0.08122	College
Nominal total	~$1.7077	~1.71%

County rate from the Collin County 2025 adopted tax rate; the Collin College, City of Plano, and Plano ISD rates are each unit's adopted 2025 rate (Collin Central Appraisal District rate table). This example is for a City of Plano / Plano ISD parcel; your total depends on your city, school district, and special districts.

Two things stand out. First, the school district ($1.03955) is the single largest slice - on its own it is nearly seven times the entire Collin County levy ($0.149343). Second, the nominal stacked rate of about $1.7077 per $100 (~1.71%) is higher than the ACS effective rate of about 1.58%. That gap is mostly exemptions: the school district, the biggest unit, only taxes value above the $140,000 homestead exemption, and Collin County, Collin College, and the City of Plano each grant additional local-option percentage homestead exemptions, so the rate people actually pay on market value is lower than simply adding the posted rates together.

Where your property-tax dollar goes

School district ~61% City ~26% County ~9% Collin College ~5%

On a typical City of Plano / Plano ISD parcel, the school district is about 61% of the bill (Plano ISD $1.03955 / $1.7077 nominal total). The city is roughly 26%, Collin County about 9%, and the Collin College district about 5%. Percentages are rounded and use the nominal posted rates before any exemption.

Homestead exemption, the 10% cap, and key dates

If you own and occupy your home as your principal residence on January 1, you can claim a residence homestead exemption. For a Plano ISD parcel, that exemption removes $140,000 from the value the school district taxes for the 2025 tax year. If the owner is 65 or older, an additional $60,000 ISD exemption applies, plus a school-tax ceiling (freeze) that caps the school portion of the bill going forward. The school-district exemption lowers the school-district taxable value only - but Collin County is notable for stacking generous local-option percentage homestead exemptions on top: Collin County grants 5% (minimum $5,000), Collin College grants 20%, and the City of Plano grants 20%, each off the value that unit taxes. Check your parcel's full exemption list with the Collin Central Appraisal District (CollinCAD).

Separately, the 10% homestead appraisal cap limits how much your homestead's appraised (taxed) value can rise to 10% per year, not counting new improvements. The cap applies to the appraised value used for your bill, not the market value the appraisal district sets, and it starts the year after you first qualify for the homestead exemption.

Worked example: on a $475,600 Plano ISD home with a homestead exemption, the school district taxes only $475,600 - $140,000 = $335,600, while the county, city, and college districts tax up to the full value (less the local-option percentage exemptions each grants). That single school-district difference is why the exemption matters most against the largest unit.

Key dates: Collin County property tax is due January 31 and becomes delinquent February 1, when a 6% penalty plus 1% interest begins and increases monthly. To challenge your value, file a protest with the Collin Central Appraisal District (CollinCAD) by May 15, or 30 days after your appraisal notice is mailed, whichever is later.

How to protest your appraisal

You can pursue an informal review with a CollinCAD appraiser, a formal Appraisal Review Board (ARB) hearing, or CollinCAD's online protest process. File and track everything at collincad.org. Some private firms offer to handle protests for a percentage of any tax savings; such firms exist and charge a contingency fee, but we do not cite any savings figure or success rate as fact - results vary by parcel and year.

Estimate your Collin County property tax

Sources: Collin County Tax Assessor-Collector and the Collin County FY2025-26 adopted tax-rate notice (county rate, 2025), the Collin Central Appraisal District rate and exemption table (Collin College, City of Plano, Plano ISD adopted 2025 rates, local homestead exemptions, protest, dates), and Census ACS 2024 5-year estimates (typical effective rate).

Vehicle Taxes in Texas

Unlike many states, Texas does not levy an annual value-based property tax on cars or other vehicles. There is no yearly "car tax" bill in Collin County. Instead, vehicle taxes in Texas work two ways:

• One-time motor-vehicle sales/use tax of 6.25% at purchase. For a private-party sale, the tax is charged on the greater of the actual sales price or 80% of the vehicle's Standard Presumptive Value (SPV). A vehicle received as a gift is taxed at a flat $10 instead.
• A flat annual registration fee (plus any local add-ons), which is a fixed fee, not a tax on the vehicle's value. In Collin County you register and title through the Collin County Tax Assessor-Collector.

So if you searched for a Texas car or vehicle sales tax, the answer is the one-time 6.25% charged when the vehicle is titled - there is no recurring vehicle property tax to budget for each year.

Collin County Sales Tax

The combined sales tax rate in the City of Plano is 8.25%. It is built from a state rate plus two local components - and Collin County itself levies no county sales tax.

Plano (Collin County) sales tax components

Component	Rate
Texas state rate	6.25%
City of Plano	1.00%
DART (Dallas Area Rapid Transit)	1.00%
Collin County	0.00%
Combined rate	8.25%

Texas law caps the total local portion at 2.0%. This is a shared ceiling, not additive past 2%: once city, transit, and any special-purpose district rates add up to 2%, no further local rate can stack on top. That is why 8.25% is the maximum combined sales tax anywhere in Texas, including Collin County. The local mix differs by city (for example, McKinney and Frisco also reach 8.25% but use local economic-development components instead of DART). Qualifying groceries are exempt from sales tax.

Real Example: a $450,000 Plano Home

Here is how the numbers flow on a representative $450,000 City of Plano / Plano ISD home with a homestead exemption (owner under 65), using the school-district homestead only:

• Market value: $450,000.
• Homestead exemption: the school-district homestead exemption removes $140,000 from the Plano ISD taxable value, so the school district taxes $310,000. The city, county, and college districts tax the full $450,000 in this simplified example (the local percentage homestead exemptions would lower those lines further).
• Stacked total: school $310,000 × 1.03955% = ~$3,223; city $450,000 × 0.4376% = ~$1,969; county $450,000 × 0.149343% = ~$672; Collin College $450,000 × 0.08122% = ~$365.
• Estimated annual bill: about $6,229 per year.
• Monthly equivalent: about $519 per month.
• Effective rate: about 1.38% of market value in this simplified example - close to, and slightly below, the county-wide ACS median effective rate of about 1.58%, which blends higher-rate cities and school districts across Collin County.

Limitations:

• Your total varies by school district, city, and any special district covering your parcel.
• Local-option exemptions (Collin County 5%, Collin College 20%, City of Plano 20%, plus over-65, disability, disabled-veteran) vary by unit and can lower the bill further; this simplified example applies only the school-district homestead.
• New-construction homes are often taxed on land only in the first year, then jump once the structure is on the roll.
• A newly purchased home can reset toward your purchase price in year two, before your own homestead cap takes hold.
• This is an estimate, not a parcel-exact bill. The typical effective rate is a Census ACS estimate, not a guaranteed rate.