A home in Tomball sits inside several overlapping taxing jurisdictions, and the combined Tomball property tax rate for 2025 lands in the range of about $2.08 to $2.15 per $100 of taxable value for most residences. The Tomball Independent School District takes the largest share, followed by Harris County, the City of Tomball, the Harris County Hospital District, Lone Star College, and a few smaller entities. What you actually pay depends on which districts cover your parcel, the exemptions you file for, and whether the homestead cap is holding your appraised value below market.
Who Taxes a Tomball Home
Each jurisdiction sets its own rate, and those rates stack to form your total. For tax year 2025, the main pieces are:
- Tomball ISD: about $1.0629 per $100 of taxable value (a $0.6669 maintenance-and-operations rate plus a $0.396 debt-service rate). This is by far the largest line.
- Harris County: $0.380960 per $100.1Harris County Tax Office. Tax Rate Information
- City of Tomball: $0.340940 per $100.2City of Tomball. Finance – Property Taxes
- Harris County Hospital District: $0.187610 per $100, funding the Harris Health System.3Harris County Tax Office. Notice of Adopted 2025 Tax Rates
- Lone Star College System: $0.1060 per $100.4Lone Star College. Taxpayer Information – Property Tax Rates
- Port of Houston Authority: $0.00590 per $100.3Harris County Tax Office. Notice of Adopted 2025 Tax Rates
- Harris County Flood Control District: a smaller per-$100 levy dedicated to drainage and flood-mitigation work.
Some Tomball-area properties also fall inside a Harris County Emergency Services District, such as ESD 8 or ESD 15, which funds fire and EMS service in unincorporated areas.5Harris County ESD No. 8. About the District Whether an ESD applies depends on your exact address, and the added rate is relatively small. Your annual statement from the Harris County Tax Office lists every jurisdiction that taxes your parcel, its rate, and the amount owed.
How the Bill Is Calculated
The Harris Central Appraisal District (HCAD) sets a market value for every property in its jurisdiction each year.6Harris Central Appraisal District. Harris Central Appraisal District Two layers sit between that market value and the number your taxes are actually based on: the homestead appraisal cap and any exemptions you qualify for.
The 10-Percent Homestead Cap
If you own and live in the home as your primary residence, Texas Tax Code Section 23.23 limits the yearly increase in your appraised value to 10 percent, plus the value of any new construction.7State of Texas. Texas Tax Code 23.23 – Limitation on Appraised Value of Residence Homestead In a market where prices jump 20 or 30 percent in a single year, the cap can create a wide gap between your appraised value and the market figure. The cap resets when you move, so a new buyer is taxed on full market value in year one and starts building cap protection from there.
From Appraised Value to What You Owe
Once the appraisal district applies the cap, it subtracts any exemptions. What is left is your taxable value. The arithmetic is simple: divide taxable value by 100, then multiply by each jurisdiction’s rate. A home with a $300,000 taxable value and a combined rate of $2.08 would owe $6,240 for the year. Each jurisdiction shows as a separate line on the statement, but the Harris County Tax Office collects the whole bill at once.
Exemptions That Lower Your Bill
Exemptions remove part of your appraised value from taxation before the rate is applied. They are the single most effective lever a homeowner has, and plenty of Tomball owners miss ones they qualify for.
General Homestead
Any Texas adult who owns and occupies a home as a primary residence can claim a homestead exemption. For school district taxes, the biggest slice of a Tomball bill, the exemption removes $140,000 of appraised value.8State of Texas. Texas Tax Code 11.13 – Residence Homestead Other taxing units may adopt a local-option exemption of up to 20 percent of appraised value, with a $5,000 floor.9Texas Comptroller of Public Accounts. Property Tax Exemptions Counties that collect flood-control taxes also provide a $3,000 homestead exemption.
Over-65 and Disabled Homeowners
Homeowners 65 or older, and those with a qualifying disability, get an additional $10,000 school district exemption on top of the standard $140,000.8State of Texas. Texas Tax Code 11.13 – Residence Homestead Other taxing units can adopt their own additional exemptions for these groups, with a $3,000 minimum.
The larger benefit for seniors is the tax ceiling. Once you qualify for the over-65 or disability exemption, your school district taxes are frozen at the dollar amount you owed in your first qualifying year. If rates rise or your appraised value climbs, your school taxes stay put. County and city taxes do not automatically get a ceiling, though some jurisdictions voluntarily adopt one. The ceiling follows you to another Texas homestead, adjusted proportionally based on the new home’s value.
Disabled Veterans
Veterans with a disability rating from the U.S. Department of Veterans Affairs receive exemptions scaled to that rating:
- 10 to 29 percent: up to $5,000 removed from the property’s value
- 30 to 49 percent: up to $7,500
- 50 to 69 percent: up to $10,000
- 70 to 99 percent: up to $12,000
- 100 percent: full exemption from all property taxes
10Texas Veterans Commission. Property Tax Exemptions Available to Veterans Per Disability Rating To claim the exemption, submit your official VA award letter showing the disability rating to the appraisal district.11Texas Comptroller of Public Accounts. Disabled Veteran and Surviving Spouse Exemptions Frequently Asked Questions
How to File
Exemptions are not automatic. File an application with the Harris Central Appraisal District, ideally between January 1 and April 30 so HCAD can process it before fall statements go out.12Harris Central Appraisal District. Property Tax Exemptions for Homeowners If you miss that window for a general homestead, you can still apply up to two years after taxes became delinquent for that year.
You will need a Texas driver’s license or state ID with an address that matches the property. HCAD will not process a homestead exemption if the two do not match.13Harris County Appraisal District. Appraisals, Exemptions, and Property Taxes for Older or Disabled Homeowners Update your ID first if you have recently moved.
Protesting Your Appraisal
If HCAD’s value looks too high, you have the right to protest, and in a fast-moving market the district often overshoots. Filing costs nothing and does not require a lawyer or consultant.
The deadline is May 15, or 30 days after HCAD mails your notice of appraised value, whichever is later.14Texas Comptroller of Public Accounts. Appraisal Protests and Appeals File Form 50-132 (Property Owner’s Notice of Protest) or send a written notice identifying the property and stating that you disagree with the valuation. HCAD also accepts protests online through its iFile system.
After you file, the district typically offers an informal conference with a staff appraiser. Bring recent comparable sales for similar homes in your neighborhood, photos of condition issues that reduce value, and your own estimate of what the property is worth. Many protests settle at this stage.
If the informal conference does not produce a workable result, the protest moves to a formal hearing before the Appraisal Review Board, which must give you at least 15 days’ notice of the hearing date. Both sides present evidence and the board issues a written decision.14Texas Comptroller of Public Accounts. Appraisal Protests and Appeals You can appear in person, by phone, by video, or by written affidavit.
Hiring a property tax consultant is common around Houston. Most work on contingency, charging roughly 25 to 50 percent of the first year’s tax savings. You pay nothing if they fail to reduce the bill, but a successful consultant keeps a significant share of what they save you.
Paying the Bill
The Harris County Tax Office collects for every jurisdiction on your statement. Bills go out in the fall, and the deadline to pay without penalty is January 31. Payment options:
- Online by credit card, debit card, or e-check through the Harris County Tax Office website. Credit and debit cards carry a 2.40 percent surcharge (minimum $1.00); e-checks cost $0.50.15Harris County Tax Office. Property Tax
- By mail with a check or money order; the USPS postmark must be on or before the deadline.
- In person at a Harris County Tax Office branch.
Payments sent by UPS, FedEx, or another carrier must show a receipt date on or before January 31. Online transactions must be completed by 11:59 p.m. Central Time on the due date.15Harris County Tax Office. Property Tax
Installment Plan for Seniors and Disabled Owners
If you qualify for the over-65 or disability homestead exemption, Texas law lets you split the bill into four equal installments without penalty. Pay the first installment before February 1 and submit written notice that you intend to use the plan. The remaining payments are due before April 1, June 1, and August 1.16Texas Comptroller of Public Accounts. Payment Options Missing any installment triggers a 6 percent penalty plus 1 percent monthly interest on the unpaid amount. Disabled veterans and their unmarried surviving spouses who qualify for a veteran exemption can use the same schedule.
What Late Payment Costs
Miss January 31 and a penalty-and-interest clock starts running. The penalty begins at 6 percent of the unpaid tax in February and climbs 1 percent each additional month through June. On July 1, the penalty jumps to a flat 12 percent regardless of how many months have passed. Interest runs separately at 1 percent per month starting in February.17Harris County Tax Office. Property Tax Frequently Asked Questions
By July, a delinquent account carries 12 percent in penalties plus 6 percent in accrued interest, for 18 percent on top of the original bill. At that point the account is referred to a law firm for collection, and attorney fees of 15 to 20 percent are added to the balance. For real property, that referral happens on the first business day in July.17Harris County Tax Office. Property Tax Frequently Asked Questions The attorney fees alone can turn a manageable balance into a serious problem.
Partial payments between February and June are accepted, though penalty and interest continue to accrue on whatever is unpaid. After June, you can enter into an installment agreement to clear the remaining balance plus accumulated penalties and interest over the following six months. A homestead that enters an installment agreement stops accruing additional penalties, though 1 percent monthly interest continues until the balance is cleared.
Over-65 and disabled homeowners who cannot pay can also apply for a tax deferral, which pauses collection indefinitely. No penalties accrue during a deferral, but interest runs at 5 percent per year. When the deferral ends, the full balance plus accumulated interest comes due, and standard penalties and attorney fees apply to anything not paid within 180 days.