What does an ag valuation on a Hill Country listing mean?
If you are looking at a few acres outside New Braunfels, check the appraisal record for an agricultural valuation before you write an offer. It is one of the first things I would want to talk through with you, because it can shape your carrying costs, your plans for the land and one paragraph of your contract.
One version is called 1-d-1, or open-space appraisal. Under it, the appraisal district values the land based on its capacity to produce agricultural products instead of its market value. That special appraisal can lower the tax bill on land that qualifies.
The valuation follows how the land is used. To qualify, the land has to be devoted principally to agricultural use to the degree of intensity generally accepted in the area. It also needs a track record of agricultural or timber use for at least five of the past seven years. Land inside a city or town has to meet additional conditions.
So when a listing says “ag exempt,” read it as a description of how the land has been used and taxed so far. Whether it stays that way depends on what happens after you close. You can check one local detail yourself. The Comal Appraisal District lists the filing deadline for these applications as April 30, which matches the Tax Code rule that the form must be filed before May 1.
Does buying the land trigger a rollback tax?
For 1-d-1 land, the sale itself does not. The Comptroller’s manual for agricultural appraisal says plainly that selling the property does not trigger the 1-d-1 rollback, and the Comal Appraisal District says the same thing on its agricultural appraisal page.
What triggers it is a change of use. Under Tax Code Section 23.55, when land that has been appraised this way changes use, an additional tax is imposed. For each of the three years before the year of the change in which the land had this appraisal, it equals the difference between the taxes actually imposed and the taxes that would have been imposed on market value.
A few details matter when you are the buyer:
- The lien sits on the land. A tax lien attaches to the land itself. It secures the additional tax and any penalties and interest if the tax goes delinquent.
- A partial change is taxed as a partial change. If only part of the parcel changes use, the additional tax applies only to that part.
- The chief appraiser decides. The chief appraiser determines whether and when a change in use has occurred and must send the owner a notice that explains the right to protest.
- A homestead claim alone is not a change. Claiming the land as part of your residence homestead does not, by itself, change its use for rollback purposes.
There is a second kind of agricultural appraisal, called 1-d, that works differently. Under 1-d, a change of ownership does trigger a rollback, according to both the Comptroller’s manual and the Comal Appraisal District. So the first question I would ask on any tract is which one the land has. Glen’s Texas homestead exemptions guide covers the residence side of the tax picture if you plan to live on the property.
What counts as a change of use?
The rollback follows the land being taken out of agricultural use. The Comptroller’s manual says the owner can trigger it by ending agricultural operations or by diverting the property to a non-agricultural use. That is why your plans matter more than the closing itself. The chief appraiser makes the call, so before you buy, decide how much of the land you intend to take out of agricultural use and ask a property tax professional what that could mean.
Who pays if the use changes around closing?
On a farm or ranch sale, TREC’s Farm and Ranch Contract (TREC 25-17) answers this in Paragraph 13B, titled Rollback Taxes. It splits the cost by cause:
- If the sale or your use of the property after closing results in additional taxes, penalties or interest for periods prior to closing, those assessments are your obligation as the buyer.
- If they are imposed because of the seller’s use or change in use before closing, they are the seller’s obligation.
- The paragraph says these obligations survive closing.
Notice the words “for periods prior to closing” in Paragraph 13B. A rollback looks back up to three years before the year of the change, so if the use changes soon after you close, the assessment can cover years when the seller owned the land. How Paragraph 13B applies to a particular deal is a question for a Texas real estate attorney.
This is where contract discipline earns its keep. Before you sign, get clear on what the seller is doing with the land today, whether anything has changed recently, and what you plan to do in the first year or two. If something comes up after you sign, such as the seller ending a grazing lease or selling off livestock before closing, raise it while your option period, if your contract has one, is still open. Glen’s guide to what a landman’s eye catches on a Texas land listing walks through other land questions worth asking at the same time.
Your title company can tell you how it plans to handle current-year tax prorations at closing, which are a separate item in Paragraph 13A. Glen’s article on what a title company does in a Texas home purchase explains that side of the closing.
Do you have to reapply after you close?
Usually, yes. Under Tax Code Section 23.54, once an application is approved, the land keeps the open-space appraisal in later years without a new application unless the ownership changes, the land’s eligibility ends, or the chief appraiser asks for a new application. Buying the land is a change in ownership. The Comptroller’s manual and the Comal Appraisal District both describe the same rule.
The application must be filed before May 1. If you file after that deadline but before the appraisal review board approves the appraisal records, the chief appraiser still accepts and decides the application. If it is approved, you owe a penalty of 10 percent of the difference between the tax imposed and the tax at market value.
There is a newer exception. H.B. 1244, passed in 2025, took effect January 1, 2026. It applies to land that was appraised as open-space land in the preceding tax year. For that land, ownership is not treated as changed if the new owner uses the land in materially the same way as the former owner did in the prior tax year, and the same individuals who oversaw or conducted that use keep doing so. The same bill lets that kind of new owner file late, up to the later of the tax delinquency date or the first anniversary of the transfer, without the 10 percent penalty.
Do not assume the exception fits your deal. “Materially the same way” and “the same individuals” are conditions written into the statute. If your plan depends on keeping the valuation, ask the seller who runs the operation now, whether that person will stay, and what records exist. Then talk to a property tax professional before your option period ends.
What should you check before you sign?
Your plan after closing decides which of these rules matters most.
| Your plan after closing | Application | Rollback exposure |
|---|---|---|
| Same use, run by the same people as last year, on land that had the open-space appraisal last year | Ownership may not count as changed. Late filing without the 10 percent penalty is allowed in this case | None while the agricultural use continues |
| Your own agricultural operation | New application before May 1 | None while the agricultural use continues, but the land must meet the area’s intensity standard |
| Take part or all of the land out of agricultural use | The changed part no longer qualifies | Up to three prior years of tax difference on the changed part. Ask your attorney how Paragraph 13B of the farm and ranch contract applies |
Then work through this list during your option period:
- Confirm the type. Ask the seller, and check the appraisal record, whether the land has 1-d-1 or 1-d appraisal.
- Get the current operation in writing. What is the use (grazing, hay, wildlife management), who runs it, and is there a lease?
- Ask about recent changes. Ask whether the seller has stopped or changed any agricultural use, because Paragraph 13B treats a seller’s change in use before closing separately.
- Map your own plans. Write down how much of the acreage you expect to take out of agricultural use, and where.
- Calendar the application. If you close before May 1, the deadline for that tax year may be weeks away. If you close later in the year, ask a property tax professional how the late filing rules apply to you.
- Ask the right professional. The appraisal district decides eligibility. A property tax professional or a Texas real estate attorney can tell you what your plans mean for your tax bill and your contract.
If the numbers still need sorting out after you own the land, Glen’s guide to Comal County tax protests explains how the protest process works.
