The Texas "Ag Exemption" Reality: Why 10 Acres Alone Does Not Guarantee Lower Property Taxes

Texas's commonly called "ag exemption" is not an exemption from property tax. It is a special appraisal method for qualifying open-space land. The land must satisfy the statutory history and current-use requirements, and a new owner generally must apply. A homesite or another portion converted to nonagricultural use may return to market-value appraisal.

Buying the property, constructing a residence, or temporarily pausing an agricultural operation does not by itself necessarily trigger rollback taxes on the entire tract. Under Texas Tax Code §23.55, a rollback generally follows an actual change of all or part of the land to a nonagricultural use. The treatment of a partial conversion, permitted wildlife management, temporary inactivity, or land affected by drought depends on the particular facts and applicable law.

This article explains how the agricultural appraisal actually works in Texas, what triggers a rollback, how the tax is calculated, and what your options are if you want to keep some agricultural use on the property. It is written for buyers who are new to Texas land and want to make informed decisions before they sign.

Bill Ross is a licensed Texas real estate agent, not an attorney, CPA, or tax adviser. This guidance is educational and does not constitute legal, tax, or agricultural advice. Consult qualified professionals before making decisions about property use, tax planning, or agricultural exemptions.

IMPORTANT DISTINCTION: This article primarily addresses the 1-d-1 open-space agricultural appraisal used by most Texas farm, ranch, and wildlife-management properties. It does not address every rule governing the much less common 1-d agricultural designation, which has different ownership, income, application, and rollback provisions. Although "ag exemption" is the phrase commonly used in listings, 1-d-1 is a special appraisal of qualifying land, not a complete property-tax exemption.

What This Article Covers

If you are thinking about buying land in the Texas Hill Country, you have probably seen listings that mention an "ag exemption" as a selling point. It sounds like a tax break that comes with the property. But most buyers do not understand what the ag exemption actually is, how long it lasts, or what happens when they change the way the land is used.

In this article, we will explain:

• What the "ag exemption" really is -- and why it is not actually an exemption from property tax
• The five-of-seven-year rule that determines whether land qualifies
• What triggers a rollback tax and how much it can cost
• How to calculate the rollback using your own numbers
• How the current three-year rollback rule works (and why the old five-year rule no longer applies)
• The Wildlife Management alternative that lets you keep the agricultural appraisal without running cattle
• What the specific county rules mean for buyers in Kendall and Comal County
• A step-by-step checklist to verify the ag exemption status before you buy

Whether you are a first-time acreage buyer or a seasoned investor, this guide will help you understand the real cost of the ag exemption -- and how to avoid an expensive surprise after you close.

What the Agricultural Appraisal Actually Is

What buyers and sellers commonly call an "ag exemption" is usually the 1-d-1 open-space agricultural appraisal authorized by the Texas Constitution and Texas Tax Code Chapter 23. The land is not exempt from property tax. Instead, qualifying land is appraised according to its agricultural productivity rather than solely according to its market value.

Texas Tax Code Section 23.51 establishes the principal-use, agricultural-history, and local-intensity requirements. Section 23.52 governs how qualified agricultural land is appraised. Houses and most other improvements are appraised separately under the ordinary property-tax rules.

Consider a purely hypothetical example. Assume qualifying land has a market value of $400,000 but an agricultural productivity value of $15,000. At an illustrative combined tax rate of 2 percent, the tax attributable to the land would be approximately $300 under the agricultural appraisal rather than $8,000 at market value. Actual values and rates vary by property, land category, appraisal district, and taxing unit. This example is not an estimate for any particular Kendall or Comal County property.

The potential savings can be substantial, but the appraisal continues only while the land meets the applicable legal and local requirements.

The Five-of-Seven-Year Rule

For most land outside an incorporated city or town, the land, rather than the current owner personally, must have been devoted principally to agricultural use or timber production during at least five of the preceding seven years. The land must also be currently devoted principally to a qualifying agricultural use and operated to the degree of intensity generally accepted in the area.

This distinction matters when land changes ownership:

• A buyer does not personally have to own or operate the land for five years if the land already has sufficient qualifying history.
• If a property is not currently receiving agricultural appraisal, prior agricultural use may still count if the new owner can document it.
• Starting a new agricultural activity does not erase a nonagricultural history. If the land lacks five qualifying years within the preceding seven-year period, the owner must build the necessary history before qualifying.
• Land inside an incorporated city or town is subject to additional statutory requirements. Depending on the circumstances, continuous agricultural use during the preceding five years may be required.

Do not assume the appraisal automatically transfers merely because the listing says "ag exempt." Texas law generally requires a new application when ownership changes, subject to limited statutory exceptions. Comal Appraisal District specifically identifies a change in ownership as a reason to reapply. Buyers should confirm the requirement with the applicable appraisal district and timely file Form 50-129 when required. The normal deadline is April 30, stated in the Tax Code as "before May 1."

What Actually Triggers a Rollback Tax

For 1-d-1 land, the additional tax commonly called a rollback tax is generally triggered when the use of qualifying land changes to a nonagricultural use. The chief appraiser determines whether and when a change of use occurred.

Examples can include:

• Converting agricultural acreage to a residential or commercial development
• Using part of the land as the site of a new house, driveway, yard, or other nonagricultural use
• Ending the qualifying operation and putting the land to a nonagricultural use
• Developing part of the property for a business or other incompatible use

Several important qualifications apply:

• Building a house does not automatically trigger a rollback on the entire tract. If only part of the parcel changes use, Texas Tax Code Section 23.55(d) limits the rollback to that part.
• A sale or subdivision does not, by itself, automatically trigger a 1-d-1 rollback if the qualifying agricultural use continues.
• A reduction below the appraisal district's intensity standard may cause the land to lose special appraisal without necessarily constituting a rollback-triggering change of use.
• A properly completed transition from conventional agriculture to qualifying wildlife management remains an agricultural use and ordinarily does not trigger a rollback.

Transaction Tip: In Texas real estate transactions, rollback taxes are a key negotiation point. Standard TREC contract forms by default place the financial burden on the party who changes the land use. Buyers should be cautious: if you plan to break the ag valuation by building a home, you will likely trigger the three-year retroactive tax liability.

When a qualifying change of use occurs, a tax lien attaches to the affected land on the date of the change.

How the Current 1-d-1 Rollback Is Calculated

Under current Texas Tax Code Section 23.55, a 1-d-1 rollback generally covers the three tax years preceding the year in which the change of use occurs, but only for years in which the affected land received agricultural appraisal.

Using the article's hypothetical values and an illustrative constant tax rate of 2 percent:

The Current Three-Year Rule and Interest

For a 1-d-1 change of use occurring on or after June 15, 2021, current Texas Tax Code §23.55 does not automatically add rollback interest to the additional tax. If the resulting tax bill later becomes delinquent, ordinary delinquency penalties and interest may apply. A change of use that occurred before June 15, 2021, should be evaluated under the law in effect when the change occurred.

The former five-year rollback rule is obsolete. Different provisions can apply to the less common 1-d agricultural designation, which is another reason to verify the type of appraisal shown in the county records.

After the chief appraiser determines that a change of use occurred, the owner must receive notice and has a right to protest the determination. A protest generally must be filed with the appraisal review board within 30 days of the notice, similar to an ordinary market-value protest. Missing that deadline can forfeit the right to challenge the determination administratively, so owners who disagree with a rollback or denial should not delay. If the determination becomes final, the assessor for each taxing unit issues the additional-tax bill. Texas Tax Code Subchapter D also contains several specific exceptions that can excuse what would otherwise look like a change of use, including temporary cessation of agricultural use during a declared drought (§23.522), temporary cessation while the owner is deployed or stationed outside Texas as a member of the armed services (§23.523), temporary cessation to manage the spread of certain pests (§23.524), oil and gas operations on the land (§23.525), and land subject to a temporary tick quarantine (§23.526). Certain condemnations and right-of-way acquisitions are addressed elsewhere in the Tax Code. Each exception has its own conditions and notice requirements, so a property owner relying on one of them should confirm the details with the appraisal district or a property-tax professional rather than assuming it applies automatically.

Wildlife Management: An Alternative Agricultural Use

Wildlife management is not a separate tax exemption. It is a qualifying agricultural use through which eligible land can continue receiving 1-d-1 open-space appraisal.

Under Texas Tax Code §23.51(7), wildlife management is the active use of qualifying land to propagate a sustaining breeding, migrating, or wintering population of indigenous wild animals for human use, including food, medicine, or recreation.

For the standard wildlife-management pathway, the land generally must have received qualifying open-space agricultural appraisal in the preceding year. Wildlife management ordinarily cannot be used as a shortcut to place previously unqualified recreational acreage under agricultural appraisal.

A hunting lease, by itself, is not a wildlife-management plan. Leasing land to hunters for income does not establish or preserve wildlife-management appraisal; the land must already carry qualifying open-space status, and the owner must implement and document at least three of the seven statutory practices under an appraisal-district-approved plan. Buyers evaluating Hill Country land marketed with an existing hunting lease should confirm whether the underlying appraisal is 1-d-1 agricultural, 1-d-1 wildlife management, or market value. A hunting lease can exist under any of the three.

The landowner must submit a wildlife-management plan to the county appraisal district. Texas Parks and Wildlife Department provides forms, regional guidelines, and technical assistance, but TPWD does not approve the property-tax appraisal. The chief appraiser makes the qualification decision.

The plan must implement at least three of these seven statutory practices:

• Habitat control
• Erosion control
• Predator control
• Providing supplemental water
• Providing supplemental food
• Providing supplemental shelter
• Conducting census counts

Activities such as brush management, food plots, water stations, nest boxes, prescribed grazing, and population surveys may fit within those categories when appropriate for the target species and ecoregion. Merely owning land where wildlife happens to live is not enough.

A wildlife-management plan is required. An appraisal district may also require an annual report documenting implementation, but an annual report is not automatically mandatory in every county.

Wildlife-Management Acreage Rules

Texas does not impose a general minimum acreage for wildlife-management appraisal when an intact tract transitions from qualifying agricultural use. Minimum-acreage requirements generally become relevant when a tract has been reduced in size since January 1 of the preceding tax year.

When those rules apply, the required acreage depends on the appraisal region, the percentage selected by the chief appraiser with the appraisal district board's approval, and whether the land participates in a qualifying wildlife-management property association.

Therefore, statements such as "under 10 acres is difficult," "10 to 20 acres can qualify," or "over 20 acres generally qualifies" should not be presented as statewide rules. The tract's prior appraisal, any recent division, its primary use, its management plan, and the applicable local standard all matter.

The 1-d-1 Waiver

A property owner may voluntarily waive the right to 1-d-1 appraisal on some or all of the land. The waiver is filed with the appraisal district and, once effective, generally applies for 25 years and runs with the land even if ownership changes. A waiver can be filed whether or not the land currently qualifies for agricultural appraisal. Sellers sometimes use a waiver in connection with a planned subdivision or development to resolve rollback exposure in advance; buyers should ask whether a waiver has been filed on any part of the tract, since it would affect both current eligibility and future development plans regardless of the land's actual use.

What Ten Acres Means in Kendall and Comal Counties

Ten acres is not a magic number. Local intensity standards vary by agricultural operation, soil, pasture quality, animal units, qualifying acreage, and whether part of the tract is used residentially.

Kendall County: The agricultural-use manual currently posted by Kendall Appraisal District describes 10 acres as typical or minimum acreage for several livestock operations, together with specified livestock numbers. However, its stocking-rate guidance ranges from approximately one animal unit per five acres on improved grass to one animal unit per 50 acres on heavily cedar-covered native range. The same manual identifies five to 20 acres for beekeeping and three-acre minimums for certain orchard, vineyard, and commercial truck-farming operations. These are operation-specific standards, not a blanket rule that every 10-acre tract qualifies.

Comal County: Comal Appraisal District's published standards require qualifying livestock operations to meet its animal-unit and management requirements. Its 2024 manual lists three animal units and recommends approximately five acres of improved pasture, 15 acres of good native pasture, or 25 acres of average native pasture. Its beekeeping standards apply to five through 20 acres and require six to 13 hives depending on acreage.

A residence may cause some acreage to be classified as residential rather than agricultural. The amount is not automatically one acre in every case. Consequently, buyers must verify how many acres on the appraisal record actually receive agricultural appraisal, not merely the property's gross acreage.

County manuals and intensity standards can change. Confirm the current requirements directly with the appraisal district before relying on a particular livestock count, hive count, acreage figure, or wildlife-management plan.

What to Verify Before Buying Agriculturally Appraised Land

1. Verify the type of appraisal. Confirm whether the property has 1-d-1 open-space appraisal, the rarer 1-d designation, wildlife-management use, or no qualifying appraisal at all.
2. Verify the exact acreage. Determine how many acres receive productivity appraisal and how much acreage is classified as a homesite, residential, commercial, or otherwise nonqualifying.
3. Review the records for at least seven years. Obtain the appraisal history, agricultural-use category, productivity values, market values, and any notices or pending disputes. Request from the seller the most recent 1-d-1 application, approval or denial notices, supporting records, and any wildlife-management plan or annual reports. While Texas Tax Code §23.45's automatic statutory confidentiality explicitly blankets 1-d applications rather than standard 1-d-1 open-space applications, look closely at documentation. Proprietary operational information, private leases, or financial metrics submitted to the appraisal district with a 1-d-1 file may still be withheld from public inspection under Texas Public Information Act exemptions safeguarding trade secrets or confidential commercial information.
4. Confirm the required application. Do not assume the appraisal automatically continues after closing. Ask whether Form 50-129 and supporting documentation must be filed by April 30.
5. Compare your intended use with the county's intensity standards. "Keeping a few animals" is not necessarily a qualifying operation. Review livestock numbers, stocking rates, fencing, water, management, production, and documentation requirements.
6. Separate the house site from the agricultural acreage. If you plan to build, determine approximately what acreage will change use and estimate the rollback on that portion, not automatically on the entire tract.
7. Evaluate wildlife management correctly. Confirm that the land received qualifying open-space appraisal in the preceding year, prepare the required plan, and submit it to the appraisal district rather than TPWD. The chief appraiser, not TPWD, determines qualification.
8. Estimate rollback exposure from actual records. Use the preceding three years' productivity values, market values, and tax rates. A property-tax professional, attorney, CPA, or title company can help calculate the potential exposure.
9. Review the contract allocation. The current TREC Farm and Ranch Contract and Unimproved Property Contract contain provisions addressing responsibility for rollback taxes. Buyers and sellers should confirm that the selected contract and any addenda accurately state how that responsibility is allocated in their transaction.
10. Check for required notice and existing liens. Texas Property Code §5.010 generally requires an owner selling vacant land that is currently appraised below market value under a special appraisal method to include the statute's prescribed additional-tax notice in the contract, subject to statutory exceptions and alternative contract provisions. While limited statutory exceptions exist (such as foreclosures or court-ordered transfers), this requirement applies broadly to standard consumer real estate sales of vacant acreage. Failing to provide this notice gives the buyer a powerful right to rescind the contract and recover all earnest money. The title company should also check for an existing rollback lien or unresolved change-of-use determination.
11. Do not confuse property-tax appraisal with the agricultural sales-tax program. A Texas agricultural and timber registration number used for qualifying purchases is separate from the county's 1-d-1 property-tax appraisal.
12. Structure and document agricultural leases correctly. If you intend to preserve the 1-d-1 valuation by leasing to a local producer, do not rely on a handshake deal. County appraisal districts typically require a formal, written agricultural lease agreement that specifies terms, agricultural operations, and how local stocking intensities are met.
13. Understand what the appraisal does not reduce. A 1-d-1 appraisal lowers the ad valorem property tax attributable to the qualifying land. It has no effect on fixed assessments billed separately by a Municipal Utility District (MUD), Public Improvement District (PID), or similar special district, if the property is subject to one. Confirm with the title company whether any such district assessment applies to the tract.

What Happens If Eligibility or Use Changes

A landowner should not ignore a change in eligibility or agricultural-use category. Texas Tax Code Section 23.54 generally requires written notice to the appraisal office before May 1 after eligibility ends or the category of agricultural use changes.

Failure to provide this notice triggers a statutory penalty under Texas Tax Code §23.54(h) equal to 10 percent of the difference between the taxes based on agricultural appraisal and the taxes that should have been imposed.

Keep in mind that losing eligibility and triggering a rollback are distinct events. Falling below local livestock intensity standards might cause you to lose the special appraisal without immediately triggering a rollback bill. A true rollback requires an active, physical change to a nonagricultural use. However, if a rollback determination is finalized by the chief appraiser, the tax lien retroactively attaches to the exact date the change occurred, regardless of when the district uncovers the violation. While post-2021 rollbacks no longer accrue automatic interest during the lookback period, ignoring a change-of-use notice will quickly result in standard delinquency penalties once the updated tax bill is issued.

As explained above under “The Current Three-Year Rule and Interest,” changes of use on or after June 15, 2021 do not carry automatic rollback interest under current §23.55, though ordinary delinquency penalties and interest can still apply if the resulting bill goes unpaid.

Quick Reference

• Chief appraiser: The official at the county appraisal district responsible for determining values and change-of-use decisions.
• Productivity value: The value assigned to qualifying agricultural land based on its capacity to produce agricultural products, rather than its market value.
• Degree of intensity: The level of agricultural activity (livestock numbers, acreage devoted, management practices) an appraisal district considers typical for a given operation in that area.
• Change of use: An actual shift of land from a qualifying agricultural use to a nonagricultural use, which can trigger a rollback tax under §23.55.
• ARB (Appraisal Review Board): The local board that hears protests of appraisal district determinations, including denials and rollback findings.

The Bottom Line

A 1-d-1 agricultural appraisal can substantially reduce the taxes attributable to qualifying land, but acreage alone does not create the benefit. The land must have the required history, remain principally devoted to a qualifying agricultural or wildlife-management use, meet local intensity standards, and satisfy the applicable filing requirements.

An existing appraisal is valuable, but it is not a permanent entitlement and it does not guarantee that the buyer's intended use will qualify. Conversely, a rollback is not inevitable. A buyer who continues a qualifying operation or properly transitions to wildlife management may preserve the appraisal indefinitely.

Before purchasing Hill Country acreage, calculate affordability using three figures: the current productivity-appraised land tax, the tax on the house and other nonqualifying improvements, and the tax that would apply if some or all of the land were appraised at market value. Treat the agricultural appraisal as a conditional legal valuation, not as a temporary subsidy or a guaranteed future bill.

Here is what we covered:

• The ag exemption is actually a 1-d-1 agricultural appraisal -- the land is taxed on its productive value, not its market value
• The land must have at least five of the past seven years of qualifying agricultural history
• Building a house or changing the land use does not automatically trigger a rollback on the entire tract -- it depends on the specific facts
• The current rollback covers three tax years (not five), and the old five-year rule is obsolete
• Wildlife management is a legitimate alternative that lets you keep the appraisal without running cattle
• Kendall and Comal counties have specific intensity standards that vary by operation type
• You should never buy acreage based on the ag exemption alone without verifying the actual tax exposure

Before you buy, calculate three numbers: what you pay now under the agricultural appraisal, what you would pay at market value, and what the rollback would cost if you change the use. Talk to the county appraisal district, a property-tax professional, and your real-estate agent. The ag exemption is a valuable benefit -- but only if you understand how it works and plan for it from the start.

Frequently Asked Questions

Can I keep the ag exemption if I build a house on the property?

Potentially. Constructing a house ordinarily changes the use of the homesite and other acreage devoted to residential use, but it does not automatically disqualify the entire tract. The remaining land may continue receiving 1-d-1 appraisal if its principal agricultural use and local intensity requirements continue. If only part of the parcel changes use, Section 23.55(d) generally limits the rollback to that part. Claiming a residence-homestead exemption, by itself, is not a change of use under Section 23.55(i).

How much is the rollback tax?

For a current 1-d-1 change of use, the rollback generally equals the difference between the taxes imposed under agricultural appraisal and the taxes that would have been imposed at market value for the three tax years preceding the year of the change. Only years in which the affected land received agricultural appraisal are included. For changes of use on or after June 15, 2021, current Section 23.55 does not add automatic rollback interest, although penalties and interest can accrue if the issued bill becomes delinquent.

Can I switch from cattle to Wildlife Management to avoid the rollback?

Potentially, if the land received qualifying 1-d-1 appraisal in the preceding year and the transition is completed properly. The owner must make wildlife management the land's primary use, implement at least three of the seven statutory practices, and submit an acceptable plan to the appraisal district. The chief appraiser, not TPWD, determines qualification. Make the transition before replacing the agricultural use with a nonagricultural use.

Is there a minimum acreage for the ag exemption?

Texas does not establish one statewide minimum for every agricultural operation. The land must support a genuine qualifying use at the locally accepted degree of intensity. County standards may specify or recommend acreage, livestock numbers, hive counts, or other operational requirements. Texas law specifically limits qualifying beekeeping use to land of at least five but not more than 20 acres. Wildlife-management minimum-acreage rules generally arise when a tract has been reduced in size since January 1 of the preceding tax year.

Does owning 10 acres mean my land will qualify?

No. Ten acres may satisfy the acreage component of some local operations, but it does not establish the required five-of-seven-year history, current principal use, or degree of intensity. The homesite may also reduce the qualifying acreage. In Kendall County, 10 acres is typical for several listed livestock operations, but poorer native range may require substantially more land. Comal County's recommended acreage also varies by pasture quality and required animal units.

What if I buy property that does not have an ag exemption?

Investigate the land's prior use before assuming you must wait five years. The qualification history belongs to the land, and documented agricultural use by a prior owner may count toward the five-of-seven-year requirement. If the land lacks sufficient qualifying history, the owner must establish that history before receiving 1-d-1 appraisal. The land must also meet the current-use and local-intensity standards in the year for which appraisal is requested.

Does the ag exemption apply to my house or just the land?

The 1-d-1 productivity appraisal applies to qualifying land. A house, garage, barn, and most other improvements are generally appraised separately at market value, subject to any other exemption or provision that may apply. Certain land appurtenances and qualifying farm and ranch equipment receive separate treatment under Texas law.

What happens to the ag exemption when I sell the property?

A 1-d-1 sale does not automatically trigger a rollback, and the land's qualifying use history does not disappear at closing. However, the buyer should not assume the seller's approved appraisal automatically continues without action. Confirm whether a new Form 50-129 is required, maintain the qualifying use, and meet the April 30 filing deadline. If the buyer later changes all or part of the land to a nonagricultural use, a rollback can reach qualifying tax years that occurred before the buyer owned the property. The purchase contract should clearly allocate that risk.

Who Makes the Final Decision?

The county appraisal district's chief appraiser determines whether land qualifies for 1-d-1 appraisal and whether a change of use has occurred. A real estate agent, seller, wildlife consultant, livestock operator, or listing description cannot guarantee qualification. Property owners generally have protest rights when an application is denied or a change-of-use determination is issued.

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Sources

1. Texas Tax Code Chapter 23, Subchapter D, Sections 23.51-23.55. Governing law for 1-d-1 qualification, appraisal, applications, and changes of use. statutes.capitol.texas.gov
2. Texas Comptroller of Public Accounts, "Agricultural, Timberland and Wildlife Management Use Special Appraisal." comptroller.texas.gov
3. Texas Comptroller of Public Accounts, "Manual for the Appraisal of Agricultural Land." comptroller.texas.gov
4. Texas Comptroller Form 50-129, "Application for 1-d-1 (Open-Space) Agricultural Use Appraisal." comptroller.texas.gov
5. Texas Parks and Wildlife Department, "Agricultural Tax Appraisal Based on Wildlife Management: Legal Summary." tpwd.texas.gov
6. Texas Comptroller, "Guidelines for Qualification of Agricultural Land in Wildlife Management Use." comptroller.texas.gov
7. Kendall Appraisal District, Agricultural Use Manual (August 2017). Because appraisal-district guidelines and administrative practices can change, confirm current application requirements directly with the district. kendallad.org
8. Comal Appraisal District, "Agricultural and Wildlife Special Appraisal." comalad.org
9. Comal Appraisal District, "Open Space Guidelines and Standards." comalad.org
10. Texas Property Code Section 5.010, "Notice of Additional Tax Liability." statutes.capitol.texas.gov
11. Texas Comptroller of Public Accounts, "2021 Property Tax Law Changes," explaining the statutory removal of interest from specified additional taxes. comptroller.texas.gov

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Statutory provisions and source links last checked July 20, 2026. County appraisal standards, forms, and filing procedures can change; confirm current requirements with the applicable appraisal district before acting.