What is an ag exemption in Texas, and what are rollback taxes?

An ag exemption is not an exemption. It is a special appraisal that values qualifying land on its agricultural productivity instead of market value. Changing the use triggers a rollback: three years of additional tax equal to the difference between what was paid on ag value and what would have been paid on market value.

The name is wrong, and the wrong name causes real losses

Everyone says "ag exemption." What the Tax Code provides is open-space special appraisal, commonly called 1-d-1. The land is still fully on the tax roll. It is simply valued on productivity value — what it can produce agriculturally — rather than on what it would sell for (Texas Comptroller).

That distinction matters because an exemption is something you either have or do not have, while a special appraisal is a valuation method tied to how the land is currently being used. Use changes, valuation changes, and a bill comes due for the years the land was valued the cheap way.

On Hill Country acreage the difference between productivity value and market value is frequently the majority of the tax bill. That is exactly the size of the exposure when it goes away.

What qualifies for 1-d-1 open-space appraisal

Three requirements, per the Comptroller:

Current principal use is agricultural. Not incidental, not decorative. The agricultural use has to be the land's principal use.
Degree of intensity generally accepted in the area. This is the requirement that fails. The district compares your operation to what a typical prudent operator in that area does on similar land — stocking rates, acreage, management practices. Four goats on twelve acres is not a stocking rate. Whatever the local standard is, the appraisal district defines and applies it, and it varies county to county.
History: agricultural or timber production in 5 of the preceding 7 years. The land has to have been in qualifying use for five of the last seven years.

The history requirement means a buyer cannot create eligibility on raw land by starting an operation the day after closing. It also means a seller's lapse in use can break the chain for the buyer. What the land was actually doing in prior years is a question for the appraisal district, and it is one of the things worth asking before the option period ends rather than after.

Wildlife management is a conversion, not a shortcut

Wildlife management valuation is widely misunderstood as an easier route for a buyer who does not want livestock. It is not a separate door. It is a change of use from land that already qualified.

To qualify, the land must have been previously qualified as open-space or timber land, and it must be used in at least 3 of 7 specified ways to propagate a sustaining breeding, migrating or wintering population of indigenous wild animals (Texas Comptroller).

So the sequence is: qualified ag land first, then a conversion to wildlife management. Land that never had the ag valuation cannot start at wildlife management. A buyer told "you can just put it in wildlife" needs to verify with the appraisal district that the parcel currently qualifies, because that claim is only true if it already does.

The three activities have to be real and documented. Districts ask for a management plan and annual reporting, and what satisfies them is a local determination.

The rollback: three years, and no separate interest rate

Here is the part that most web pages get wrong.

When the use changes, Tax Code §23.55 imposes an additional tax "equal to the difference between the taxes imposed on the land for each of the three years preceding the year in which the change of use occurs" and the taxes that would have been imposed had the land been taxed at market value (Tax Code §23.55).

Three years. The rollback period for 1-d-1 open-space land is three years of tax difference.

And on interest: §23.55 does not impose a rollback interest rate. The statute provides that the additional taxes incur penalties and interest as provided by law for ad valorem taxes imposed by the taxing unit only if they are not paid by the delinquency deadline for that additional tax (Tax Code §23.55). The Comptroller's ag and timber page likewise states no rollback interest rate (Texas Comptroller).

A great many real estate blogs, land listings and buyer handouts still publish a 5% or 7% annual rollback interest figure for 1-d-1 land. Do not plan around one. The rollback is three years of tax difference; ordinary delinquency penalties and interest attach only if the additional tax goes unpaid past its deadline.

The amount of a rollback on a specific parcel is calculated by the appraisal district, using its own market values and the adopted rates for those years. Ask them for the figure. Then take what it means for a deal to a CPA, because the tax treatment of a rollback payment in a transaction is a tax question, not a real estate one.

What actually triggers a rollback

The trigger is a change of use away from qualifying agricultural use. Not a sale by itself. Not a change in ownership by itself.

Things that commonly cause the problem:

Development. Platting, subdividing, building a subdivision, converting pasture to lots.
Stopping the operation. The cattle leave and nothing replaces them. The buyer intends to run cows "eventually" and a year passes.
Carving out a homesite. Building a house on part of a tract can change the use of that portion. How much acreage comes out and how the district treats the remainder is a district determination, and it is not uniform.
Failing the intensity standard. Continuing to call it a ranch while operating below what the district accepts.

The most expensive version is a buyer who closes on ag-valued acreage, does nothing agricultural for a year because the house plans and the well and the septic took all the attention, and receives a rollback bill for three years of difference on land that has appreciated substantially.

Buying ag-valued land: what to establish before you close

Does the parcel currently carry 1-d-1 open-space valuation, and for how long? Confirm with the appraisal district, not from the listing.
What is the district's degree-of-intensity standard for this county and this land type? Get it in writing if you can.
What is the market value the district would otherwise use? That number, not the ag value, drives the rollback math.
What will the operation be on day one? The gap between closing and a functioning ag use is where rollbacks are born.
Who pays a rollback if one is triggered? This is a contract term, negotiated between buyer and seller. How it is written matters, and the wording is a job for a Texas real estate attorney, not something to improvise.
What is the tax consequence of the rollback payment itself? CPA.

In Kendall County, the appraisal district that makes all of these determinations is Kendall Appraisal District (kendallad.org). Boerne is the county seat of Kendall County, not part of Bexar County or the City of San Antonio, so Bexar CAD's standards and schedules do not govern Kendall County land.

Two adjacent points people conflate

Ag valuation is not the homestead cap. The 10% homestead cap applies to a residence homestead with a homestead exemption. Ag-valued land is a separate mechanism with separate rules.

Ag land is excluded from the non-homestead circuit breaker. The temporary 20% circuit breaker under Tax Code §23.231, which covers tax years 2024, 2025 and 2026 and expires after the 2026 tax year unless renewed, excludes land under agricultural-use special appraisal (Travis Central Appraisal District). Land that loses its ag valuation is landing in a world where that cap may no longer exist either.

If you disagree with a district's determination on qualification or on the rollback calculation, the protest deadline is May 15, or 30 days after the district mails the notice of appraised value, whichever is later (Texas Comptroller).

Qualification, degree of intensity, wildlife management plans and rollback amounts are all determined by the appraisal district. Contract language allocating rollback liability is a matter for a Texas real estate attorney, and the tax consequences of a rollback belong with a CPA.

Questions about a specific property?

Call or text 830-446-3847 · Email heath.shepard@kw.com

This page explains how Texas agricultural special appraisal and rollback taxes work. It is not tax or legal advice. Qualification and rollback amounts are determined by the appraisal district; contract language belongs with a Texas real estate attorney and tax consequences with a CPA.