Assessment notices arrive on a schedule, appeal windows close in weeks and a win can take a year to reach your payment. Here is what to do in each season.
Property taxes run on a calendar, and so do appeals. The notice that looks too high arrives at a set time of year, the window to challenge it closes fast, and any savings reach your bill months later. Here is the path, season by season.
What an Assessment Notice Actually Tells You
The notice lists your property’s identifying number, its characteristics, an estimated market value and, in some counties, past exemptions. Cook County reassesses one third of the county each year on a three-year cycle. Texas requires appraisal districts to mail a notice of appraised value by May 1, or April 1 for a homestead, when the value rose from the year before.
Read the characteristics line by line. Square footage, lot size and listed features drive the value, and a mistake there is a concrete reason to appeal. The Cook County Assessor’s rule of thumb: if the characteristics are right and the value is within 10 percent of your estimate, an appeal is unlikely to change the assessment enough to matter.
The Property Tax Calendar, Season by Season
Dates vary by state and county, but the order repeats: values are set, notices arrive, a protest window opens and closes, hearings follow, and the bill comes later.
| Season | What happens | What you do |
|---|---|---|
| Winter | Prior-year bills come due; Cook County’s first installment is due in March | Review last year’s bill |
| Spring | Texas districts mail value notices by May 1, April 1 for homesteads | Check the characteristics and mark the deadline |
| Early summer | Windows close; Texas gives until May 15 or 30 days from the notice | File the protest and request the evidence packet |
| Summer and fall | Informal conferences and hearings; California decisions take months | Attend, or settle informally if the number is fair |
| Next year | A win reaches the bill; Cook County’s second installment is due in August | Compare the new bill and your escrow payment |
The Appeal Window: Short Deadlines, Simple Paperwork
Missing a deadline usually means waiting a full year. Texas gives most owners until May 15 or 30 days after the notice, whichever is later. Cook County prints the last file date on the notice itself. California homeowners file with the clerk of the board in the property’s county.
The paperwork is plain. Texas offers Form 50-132, but any written protest works if it identifies the property, the owner and what you dispute. Cook County notes that filing is free, takes as little as 20 minutes online and requires no hired representative. California counties use form BOE-305-AH, and some charge a processing fee.
Gathering Evidence Before the Deadline
Build the case early. In Texas, you can inspect the appraisal records for your property; a written request leaves a paper trail, though it does not extend the protest deadline. After you file, a second right applies: at least 14 days before the hearing, the chief appraiser must inform you that you can request a free copy of the data, schedules and formulas the district plans to introduce.
Comparable sales carry most cases. The district’s grid places your home beside similar sold homes and adjusts each price for differences such as a pool, so the adjusted sales bracket a range for your property. Photos, repair estimates and your own comparable sales belong in your file too. A purchase price helps, but assessors caution that a sale reflects the buyer, the seller and the season, not always true market value. In California, many assessors offer a short informal review form worth trying before a formal appeal.
Worth knowing
Ask for the district’s evidence packet as soon as your hearing notice allows.
The Hearing and the Decision
Many protests end at an informal conference with a staff appraiser before any hearing. Texas guidance is direct: file before the deadline even if you expect to settle informally, because filing preserves your right to a formal hearing. At that hearing, the appraisal review board listens to both the owner and the district’s representative.
In California, the appeals board hears both sides and can leave the value unchanged, lower it or raise it; it is not bound by either number. The board’s decision is final, though a challenge can be filed in superior court within six months. Texas owners who lose at the board can appeal to state district court, and some cases qualify for binding arbitration or the State Office of Administrative Hearings.
After You Win, and If You Missed the Deadline
A lower assessment corrects the record but does not guarantee a proportionally lower bill. Your bill also reflects your exemptions, your community’s total assessed value and the levies that local taxing bodies adopt. In Cook County, changes reach the second installment bill the year after the reassessment, so a notice mailed one year shows its effect the following summer.
If your taxes are paid through escrow, the savings then move into your mortgage payment after your servicer’s annual escrow analysis. Our guide to mortgage escrow accounts explains how that adjustment works.
Missed the window? Some counties offer a second chance: Cook County owners can also file with the Board of Review, which sets its own dates. Otherwise, note next year’s deadline, ask whether an informal review is available, and check whether a late filing exception applies; Texas allows certain military service members and offshore workers to file late protests.
Related guides
- What is a mortgage escrow account?: how property taxes flow through your monthly payment.
- What’s inside a monthly mortgage payment: where the tax piece fits with principal, interest and insurance.
The short version
- Assessment notices list your property’s characteristics and estimated value; check the characteristics first, since an error there is a concrete reason to appeal.
- Appeal windows are short. Texas gives most owners until May 15 or 30 days from the notice, whichever is later; Cook County prints the last file date on the notice.
- A lower assessment does not guarantee a proportionally lower bill, because exemptions, your community’s total assessed value and local levies also set the tax.
- In Cook County, the effect of a reassessment or a winning appeal shows up in the second installment bill the year after the notice.
- Filing yourself is often free and quick; Cook County says an online appeal can take as little as 20 minutes.
Readers also ask
Do I need a professional to file an appeal?
No. Cook County notes that filing is free, can be done online in as little as 20 minutes and needs no hired representative. Some property tax firms offer to file for you, but nothing requires it.
Can an appeal backfire and raise my assessment?
It can in some states. California’s appeals board must set a value after hearing both sides and can leave it unchanged, lower it or increase it. Check your state’s rules before filing.
When does a winning appeal lower my actual payment?
In Cook County, the change appears on the second installment bill the year after the reassessment. With an escrow account, the lower tax then trims your mortgage payment after the servicer’s annual analysis.
What evidence should I bring to a hearing?
Corrected property characteristics, comparable sales that bracket your home’s value, and in Texas the district’s free evidence packet, which you can request at least 14 days before the hearing.
This guide is general information about U.S. mortgages, not financial, tax or legal advice. Loan terms depend on the lender and on your credit, income and property, so confirm the details with your lender, and see consumerfinance.gov for official guidance.
