Collin County Property Tax Protest: The Complete Guide for Plano, McKinney, Frisco & Allen Homeowners

If you own a home in Collin County, you already know the story: one of the fastest-growing counties in the entire United States, booming school districts, corporate relocations, master-planned communities pushing outward in every direction — and a property tax bill that tends to grow right along with it, even in years when the market cools.

The Collin Central Appraisal District (CCAD) appraises every property in the county — from established Plano and Allen neighborhoods to newer Frisco and McKinney subdivisions, to the explosive growth corridors of Prosper, Celina, Anna, Melissa, and Princeton. In 2024, CCAD processed more than 118,000 property tax protests — roughly 26% of all parcels in the county. Of those, 70% resulted in a reduction. That's not a fluke. That's the market correcting what mass-appraisal gets wrong at scale.

Collin County homeowners who didn't file protests between 2022 and 2025 missed an estimated $127.2 million in potential savings over those three years. This guide shows you exactly what to do so you're not leaving money in CCAD's column again this year.

Why Property Taxes in Collin County Keep Rising — Even When Rates Hold Flat

Collin County added nearly 43,000 new residents in the year ending July 2025 — making it the second-fastest growing county in the United States by numeric growth. Princeton, Texas — in Collin County — was named the single fastest-growing city in the nation. Celina grew 157.6% in a recent period. Prosper, Anna, Melissa, and McKinney aren't far behind.

This growth is the engine behind property values. As buyers flood in from California, New York, and Chicago, they bid up prices in Plano, Frisco, and McKinney — and those sales feed CCAD's mass-appraisal models. The problem: CCAD appraises all properties at once using those broad market trends, but your specific home — its exact location, condition, age, and school district micro-market — is not the average. When the model is calibrated on the newest luxury resales in Frisco Station and PGA-corridor developments, it can produce values that overstate what older Plano homes, established Allen neighborhoods, or homes just across an ISD boundary would actually command.

Collin County's tax rate has not increased in 33 consecutive years. That's genuinely unusual for a county its size. But it doesn't mean your bill isn't growing — because the rate is applied to CCAD's appraised value, and that number has climbed steadily with the market. Even a modest 2–3% over-assessment on a $600,000 home is $12,000–$18,000 of extra taxable value, costing you $200–$300 per year at Plano's combined rate — compounding every year you don't challenge it.

What Is the Property Tax Protest Deadline in Collin County?

Extended Office Hours — For Homeowners With Day Jobs

CCAD understands that most Collin County homeowners are working professionals. In 2025, CCAD extended its office hours to 7 p.m. on four specific Thursdays: April 24, May 1, May 8, and May 15. Standard hours are Monday through Friday, 8 a.m. to 4 p.m. If you need to drop off a paper protest or speak with staff in person, these extended days give you that flexibility. Online filing is available 24/7 at efileprotest.collincad.org and is always the fastest method.

When CCAD Sends a Notice — and When It Doesn't

CCAD is only required to mail a Notice of Appraised Value when a property's value increases by $1,000 or more from the prior year. If your value held steady or decreased, you may not receive a notice — but you still have the right to protest. If you're unsure whether a protest makes sense, log in at collincad.org to view your property's current assessed value and comparable data. The protest deadline does not change because you didn't receive a notice.

The Informal Review Window — Opens April 16

One detail nearly every competitor guide misses: informal reviews begin on April 16 — the day after notices are mailed — and they run through the protest season. You don't need to wait until you've formally filed a protest to contact CCAD about your value. Filing your protest and requesting an informal review early gives the appraiser more time to review your evidence and potentially resolve your case before the ARB hearing season begins in mid-May.

How the CCAD Protest Process Works

CCAD's process has three potential stages. Most residential protests settle at the informal stage. Understanding how CCAD's WaitWhile system works is the key detail that sets the 2025 process apart from previous years.

Signs Your Collin County Home May Be Overassessed

Collin County's explosive growth means CCAD's mass-appraisal models are under constant pressure to keep up — and they regularly overshoot for specific property types and neighborhoods. Here are the strongest signals that a protest is worth filing:

• Your appraised value exceeds what the home could realistically sell for today — particularly relevant if you're in an established Plano or Allen neighborhood being valued alongside newer Frisco or McKinney inventory.
• You bought the home in the last two to three years for less than the assessed value — your closing disclosure or HUD-1 is typically the single strongest piece of evidence CCAD will see.
• CCAD is using new-construction comps to value your existing home — this is especially common in fast-growing areas like Frisco, Prosper, and Celina, where builder close-out prices are used to set values for resale homes two or three streets away. A 2020 home should not be valued like a 2025 new build.
• Your home is near an ISD boundary where the "better" district drives a premium — if CCAD assigned you comps from the more desirable ISD side of the street, your value may be overstated.
• You own a home above $750,000 — luxury homes have fewer genuinely comparable sales, and CCAD's adjustment methodology frequently overstates value for custom features, unique floor plans, and premium finishes.
• Similar homes in your subdivision are assessed lower per square foot — this is the unequal appraisal argument, and it's available to you regardless of whether your market value is accurate.
• CCAD's property record has errors — incorrect square footage, wrong year built, features listed that don't exist, or improvements that were removed. Search your account at collincad.org before your informal review.

What Evidence Wins a Collin County Property Tax Protest

CCAD appraisers and ARB panels make decisions based on data. The stronger your evidence, the stronger your position — whether at the informal review or the formal ARB hearing.

Strongest Evidence Types

• Recent closing statement / HUD-1 — If you purchased the home within the last two to three years for less than the assessed value, this is typically your single most powerful document. Arms-length sale prices carry enormous weight with CCAD.
• Comparable sales (comps) — Three to five recent sales of similar nearby homes at lower values per square foot. Critically: comps must be in the same subdivision or neighborhood as your property. A comp from an adjacent subdivision with a different school district or builder profile will be dismissed. Focus on same-neighborhood, same-vintage homes.
• Photos of condition issues — Deferred maintenance, roof wear, foundation movement (common in North Texas clay soils), outdated systems, flood zone proximity, or busy road noise. CCAD appraisers assume average condition — any below-average factor is a reduction opportunity.
• Professional contractor estimates — For major repair items, dated bids from licensed contractors make dollar-amount reductions concrete and defensible.
• CCAD property record errors — A printout from your collincad.org account showing incorrect square footage, wrong number of bathrooms, or features listed that don't exist. Any error that inflated your value should be corrected and used as evidence.
• Independent appraisal report — A licensed Texas appraisal establishing a lower market value. Strongest possible evidence — and triggers CCAD's higher burden of proof (clear and convincing evidence, not just preponderance) at the ARB hearing.

How TurboProtest™ Helps Collin County Homeowners

The typical Collin County homeowner who skips the protest process isn't doing it because they think their value is fair. They're doing it because they're busy — dual-income households, school-age kids, demanding careers — and the protest process spans multiple steps across several weeks. Researching comps, logging into CCAD's portal, scanning QR codes, scheduling informal reviews through WaitWhile, preparing evidence, and potentially attending an ARB hearing is a real-time commitment. That's the exact friction TurboProtest™ eliminates.

Whether your home is in a mature Plano neighborhood near Legacy Drive, a newer McKinney subdivision in the Craig Ranch or Tucker Hill area, a high-value Frisco or Prosper community, a rapidly growing Celina or Anna development, or anywhere else in Collin County — TurboProtest™ handles the entire process without interrupting your schedule.

What TurboProtest™ Does for You

• Patent-pending AI technology analyzes your CCAD appraisal against current Collin County market data, comparable sales, neighborhood equity, and ISD boundary dynamics — before anything is filed.
• We navigate CCAD's eFile portal and WaitWhile scheduling so you don't have to decode the QR code system or monitor a virtual queue.
• Licensed Texas property tax consultants who understand CCAD's evidence standards, the Frisco new-construction comp problem, and what the Collin County ARB responds to.
• We prepare your informal review evidence package — comps, condition documentation, and property record review — calibrated for your specific neighborhood micro-market.
• We represent you at the ARB if needed — so you don't have to take a half-day off to sit in a hearing room.
• No reduction, no success fee. TurboProtest™ charges 20% of verified annual savings in year one and 25% in renewal years. If there's no reduction, you owe nothing.

DIY vs. TurboProtest™ — Side by Side

Recent Property Tax Updates for Collin County Homeowners

School Homestead Exemption Raised to $140,000 (Effective 2025 Tax Year)

Texas voters approved Proposition 13 in November 2025, raising the mandatory school district homestead exemption from $100,000 to $140,000. The change applies retroactively to the 2025 tax year and is automatic for homeowners with an active homestead exemption on file with CCAD. For a Collin County homeowner with a $500,000 home in Plano ISD (rate ~$1.04/100), the additional $40,000 in school exemption saves approximately $416 per year in school taxes alone. This is automatic — you don't need to reapply.

Collin County 5% Homestead Exemption — Still in Effect

Collin County adopted a 5% optional homestead exemption on its own portion of the tax bill in FY 2009. As of 2025, this is in its 17th consecutive year. Combined with the statewide school exemption, it provides additional savings on the county's $0.149343 per $100 rate. Apply at collincad.org using Form 50-114 by April 30 if you haven't filed. Filing can also be done retroactively for up to two prior years.

Over-65 and Disabled School Tax Exemption Raised to $60,000

Senate Bill 23, also approved by Texas voters in November 2025, raised the additional school tax exemption for homeowners 65+ or disabled from $10,000 to $60,000. Combined with the $140,000 standard school exemption, qualifying homeowners can exempt up to $200,000 of home value from school taxes. For Collin County seniors, this could reduce or eliminate the school district portion of the tax bill. The exemption also activates a school district tax ceiling — preventing school taxes from increasing above the level when you first qualified.

33 Consecutive Years Without a County Tax Rate Increase

Collin County commissioners voted in September 2025 to maintain the FY 2024–25 property tax rate of $0.149343 per $100 valuation — the 33rd consecutive year without a county rate increase. While this is a meaningful commitment, it only controls one piece of your tax bill. School district rates, city rates, and Collin College's rate are set independently — and your bill grows whenever any entity increases its rate or CCAD increases your appraised value. Plano, for example, considered a rate increase for FY 2025–26 that would have added approximately $248 to the average homeowner's bill.

2025 Values: A Modest Decline — But Assessed Values Don't Always Follow

Collin County residential values declined approximately 2.2% year-over-year in the most recent data. But declining market values don't automatically translate into lower assessed values for homesteaded properties — the 10% annual cap means assessed values lag market values on the way down just as they did on the way up. A homestead-capped property that appreciated rapidly from 2020 to 2022 may still have an assessed value that exceeds current market value even after the decline. This creates a protest opportunity that many homeowners overlook because they see the market "correcting" and assume CCAD's numbers are adjusting with it. They may not be.

Documents to Gather Before Your CCAD Protest

Having these ready before you open the eFile portal lets you upload evidence immediately and enter the informal review process faster. Remember: informal evidence and formal ARB evidence are treated separately — organize both.

Frequently Asked Questions — Collin County Property Tax Protest

Ready to Protest Before May 15?

Collin County's protest process is genuinely more accessible than most Texas counties — CCAD's online filing system, WaitWhile scheduling, and extended evening hours are all designed to help busy homeowners participate. But accessible is not the same as simple. Researching same-subdivision comps, navigating CCAD's specific eFile portal, scheduling the informal review, building the right evidence package for your specific micro-market, and potentially attending an ARB hearing — that's a real commitment across several weeks of the spring.

TurboProtest™ handles every step. Our patent-pending AI identifies your reduction opportunity. Our licensed Texas experts manage CCAD's filing system, schedule your WaitWhile informal review at the right time, build a neighborhood-calibrated evidence package, represent you at the informal and ARB stages, and track every deadline on your behalf. You get updates when something happens. You don't get homework.

No reduction. No fee. No runaround.

This article is for informational purposes only and does not constitute legal or financial advice. Deadline and exemption information is based on official CCAD, Collin County, Texas Comptroller, and public sources as of the publication date and may change. Verify your specific protest deadline on your Notice of Appraised Value or at collincad.org. A protest is a standard legal process; outcomes vary by case and no specific result can be guaranteed. TurboProtest™ is operated by Edison and Madison Analytics Group Inc. Patent-pending technology.