Collin County Property Tax
To protest a Collin County value with the Collin Central Appraisal District, file by May 15 or 30 days after your appraisal notice is delivered, whichever is later (Texas Tax Code 41.44). In 2027, May 15 is a Saturday, so the deadline moves to Monday, May 17 (Tax Code 1.06).
How Collin County property tax works, what the rate is where you live, how the homestead exemption and the 10 percent cap limit your bill, and how to protest the value the Collin Central Appraisal District put on your notice. Every number carries its source. If you want the comparable sales for your street, call or text (214) 600-3392.
On this page
How a Collin County tax bill is calculated
Three things set your bill. The Collin Central Appraisal District sets the market value of your home each January 1 and mails it to you in April. Exemptions and the cap turn that market value into a lower taxable value. Then each taxing unit, the county, the city, the school district, the college district and, where there is one, the hospital district, adopts a rate each year, usually in August or September, and applies it to the taxable value. The appraisal district does not set rates and the taxing units do not set values, which is why protesting is aimed at the appraisal district and rate complaints go to the city council and school board.
Example: a $490,000 homestead at the 2026 total rate of 1.678 percent would owe about $8,220 a year with no exemptions. With the $140,000 school homestead exemption the bill drops to roughly $6,793. For one address, the Home Check shows the flood zone and whether it sits in a MUD or other water district; the total rate is on the county tax bill.
Collin County property tax rates
| Taxing unit | Rate per $100 of taxable value, 2025 (bills paid early 2026) / 2026 |
|---|---|
| Collin County | 0.149343 (2025) / 0.151414 (2026) |
| Collin College | 0.081220 (2025) / 0.081220 (2026) |
| City of Frisco | 0.425517 (2025) / 0.425517 (2026) |
| Frisco ISD | 1.019400 (2025) / 1.019400 (2026) |
| City of McKinney | 0.412284 (2025) / 0.412284 (2026) |
| McKinney ISD | 1.104300 (2025) / 1.066400 (2026, on the November 3, 2026 ballot as a tax rate election) |
| City of Plano | 0.437600 (2025) / 0.437600 (2026) |
| Plano ISD | 1.039550 (2025) / 1.032750 (2026) |
| City of Allen | 0.415400 (2025) / 0.414700 (2026) |
| Allen ISD | 1.125800 (2025) / 1.103700 (2026) |
Per $100 of taxable value. The 2026 rates are from the Collin County Tax Office sheet, 2026 Tax Rates and Exemptions by Jurisdictions. Added up for 2026, the totals are about $1.68 per $100 in the Frisco ISD part of Frisco, $1.70 in the Plano ISD part of Plano, $1.71 in the McKinney ISD part of McKinney (if voters approve the McKinney ISD rate on November 3, 2026) and $1.75 in the Allen ISD part of Allen, before any MUD or PID. Newer subdivisions add a MUD or PID line on top.
The homestead exemption
$140,000 off the school district taxable value of a homestead, raised from $100,000 by Senate Bill 4 and approved by voters in November 2025, effective for the 2025 tax year forward. Homeowners 65 or older or with a disability get an additional $60,000 school exemption under Senate Bill 23, so a senior can exempt $200,000 of value from school taxes. Raising the exemption from $100,000 to $140,000 takes another $40,000 off the taxable value your school district taxes. Multiply $40,000 by your school district rate to see the yearly savings.
You file once with the Collin Central Appraisal District, free, with a Texas driver license that matches the property address. The normal deadline is April 30, but Texas accepts a late application up to two years after the taxes for that year became delinquent, so you can still claim the last two years. If you bought in the last two years and have never filed, do it this week.
The 10 percent cap and the 20 percent circuit breaker
A homestead's appraised value cannot rise more than 10 percent a year plus the value of new improvements. That cap is permanent. Non homestead real property valued at $5,320,000 or less in 2026 has a separate 20 percent cap, the circuit breaker, which expires December 31, 2026 unless the Legislature acts in 2027.
The cap is why your notice shows two numbers: market value and appraised, or capped, value. In a year when the market rises faster than 10 percent the gap grows and you are taxed on the lower one. In a flat year like 2026 the cap catches up, which is why many homeowners saw their taxable value rise even when the market value did not.
Your 2026 notice
MetroTex reported a Collin County median price of $439,000 in September 2026, down 1 percent from a year earlier, on 1,346 closed sales, down about 10 percent (MetroTex Collin County Housing Report, September 2026). With prices slipping, a notice that rose is the one worth protesting.
Look up any property's values at the Collin Central Appraisal District property search. The appraisal district's number is a mass appraisal built from neighborhood models. It is not the same thing as what a buyer would pay for your house this month, and the two drift apart most on streets where the houses are not alike. Our appraised value versus market value page explains the difference.
How to protest in Collin County
- Check the deadline. Monday, May 17 in 2027 (May 15 falls on a Saturday) or 30 days after your notice is delivered if that is later (the 2026 deadline of May 15 has passed).
- File online. Use the Collin CAD online protest portal. Choose both "value is over market value" and "value is unequal compared with other properties" as reasons. Checking both puts both on the record.
- Get the evidence. Closed sales of comparable homes from the months around January 1, photos of anything that hurts value, repair estimates, and the appraisal district's own values on the comparable houses on your street. We send the closed sales for free.
- Take the informal offer if it is fair. Most protests settle with an appraiser online or by phone before any hearing.
- Go to the Appraisal Review Board if it is not. A short hearing, usually fifteen minutes. Bring your evidence printed and ask for a specific number.
Protest companies usually charge a share of the tax saved; ask for the percentage in writing before you sign. On a typical homestead that is reasonable if you will not do it yourself and a waste if you will. Our step by step guide covers the hearing itself.
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Get the comparable sales for your street
Protesting or just curious what the house is actually worth? We pull the closed sales that match your home and send them. Free.
Questions people ask
When is the Collin County property tax protest deadline?
Monday, May 17 in 2027 (May 15 falls on a Saturday) or 30 days after your notice is delivered if that is later (the 2026 deadline of May 15 has passed). Notices went out in mid April, as they do each year. File through the Collin CAD online protest portal or by mail to the Collin Central Appraisal District.
What is the property tax rate in Collin County?
It depends on the city and school district. Per $100 of taxable value. The 2026 rates are from the Collin County Tax Office sheet, 2026 Tax Rates and Exemptions by Jurisdictions. Added up for 2026, the totals are about $1.68 per $100 in the Frisco ISD part of Frisco, $1.70 in the Plano ISD part of Plano, $1.71 in the McKinney ISD part of McKinney (if voters approve the McKinney ISD rate on November 3, 2026) and $1.75 in the Allen ISD part of Allen, before any MUD or PID. Newer subdivisions add a MUD or PID line on top.
How much is the Texas homestead exemption?
$140,000 off the school district taxable value of a homestead, raised from $100,000 by Senate Bill 4 and approved by voters in November 2025, effective for the 2025 tax year forward. Homeowners 65 or older or with a disability get an additional $60,000 school exemption under Senate Bill 23, so a senior can exempt $200,000 of value from school taxes.
What is the 10 percent cap?
A homestead's appraised value cannot rise more than 10 percent a year plus the value of new improvements. That cap is permanent. Non homestead real property valued at $5,320,000 or less in 2026 has a separate 20 percent cap, the circuit breaker, which expires December 31, 2026 unless the Legislature acts in 2027.
Can PonyUp help me protest in Collin County?
We send you the closed comparable sales for your street for free, which is the evidence the Appraisal Review Board actually weighs. Call or text (214) 600-3392 with the address.
Communities in Collin County on this site: Plano, Frisco, Allen, McKinney. Other counties: Dallas County · Rockwall County. Figures quoted from the named public sources on the dates shown; confirm current rates and deadlines with the taxing units and the appraisal district.