The Texas Ag Exemption Explained for Hill Country Land Buyers

The “ag exemption” is not technically an exemption. It’s a special appraisal that taxes qualifying land on what it can produce instead of its market value, and it lasts only while the land stays in genuine agricultural or wildlife use.

As a buyer, you’ll file your own application after closing. If the use ever stops, a rollback tax recaptures three years of the difference.

Here is how it works, using Comal Appraisal District’s published standards as the example. Your appraisal district has the final word, so confirm the details for the specific property before you buy.

What 1-d-1 open-space valuation is

The Texas Comptroller explains that the Texas Constitution and Tax Code let qualifying farm and ranch land be appraised on its productivity value, which is usually lower than market value. The Comptroller’s special valuation flyer is direct about it: there is no property tax exemption for agricultural land, only a different way of valuing it.

Most buyers deal with 1-d-1, or open-space, appraisal. It has no income requirement, individuals and corporations can both qualify, and the land needs agricultural use in five of the preceding seven years.

The older 1-d appraisal is different. It requires an annual application, and agriculture must be the owner’s primary occupation and source of income.

Only land qualifies. Comal Appraisal District appraises the house and other improvements at market value and assigns some land around a residence to residential use.

What qualifies in Comal County

Comal Appraisal District’s Open Space Guidelines test four things: historical use, current use as of January 1, principal use, and degree of intensity. Historical use means agriculture was the principal use for five of the preceding seven years, or five continuous years inside a city.

Degree of intensity is where small tracts usually struggle. Some of the district’s published standards:

• Livestock: at least 3 animal units, with recommended acreage of 5 acres of improved pasture, 15 acres of good native pasture or 25 acres of average native pasture. An animal unit is 1,000 pounds of live weight. The operation must produce meat, milk or fiber, and miniature horses and miniature donkeys don’t count.
• Horses: the operation must be a breeding operation, or the horses must have a farm or ranch use.
• Beekeeping: 5 to 20 acres, starting at 6 hives on the first 5 acres and scaling up from there.
• Orchards and vineyards: a pecan orchard needs 5 acres at 15 trees per acre, and a vineyard needs 3 acres at 100 vines per acre.
• Hay: standard production practices, with 2 to 3 cuttings in a typical year.

The district says token operations below its minimums, such as hobby farming or a home garden, don’t qualify. It reviews the guidelines every year, so check the current version.

Wildlife management valuation

Wildlife management is an agricultural use, not a separate exemption. Under the Comptroller’s wildlife guidelines, the land must have been qualified open-space or timberland when the wildlife use began. The owner must then use at least three of seven practices: habitat control, erosion control, predator control, supplemental water, supplemental food, providing shelters and census counts.

A few points buyers often miss:

• It’s revenue neutral. Land converted to wildlife keeps the same appraised value it had in its prior agricultural category.
• You need a wildlife management plan on the Texas Parks and Wildlife form, filed with the appraisal district, not with TPWD. Comal Appraisal District also requires an annual report once the land is approved.
• To switch to wildlife, the Comptroller’s guidelines say to notify the chief appraiser in writing before May 1 of the year you want it, with a new application and the plan.
• Size matters after a split. Comal County is in the Edwards Plateau (Eastern) region, and the district requires 95% of a tract to be devoted to wildlife management, which works out to a 20-acre minimum. That minimum applies only when the tract is smaller than it was on January 1 of the prior year.

How a buyer keeps it after closing

1. Ask before you sign. Confirm the current valuation with the appraisal district. Ask the seller who runs the operation, whether a grazing or hay lease exists, and for any wildlife plan and annual reports.
2. Read the rollback clause. In the TREC Farm and Ranch Contract, additional taxes caused by the sale or by your use after closing are yours. If the seller changed the use before closing, they’re the seller’s.
3. File your own application. Approval carries forward only until ownership changes. File Form 50-129 with the appraisal district before May 1, along with any supplement your district requires.
4. Watch Comal’s deadlines. Comal Appraisal District sets the deadline at April 30 and adds a 10% penalty to approved late applications. Its guidelines say the valuation stays through the end of the year, then comes off if a requested reapplication never arrives.
5. Keep the operation at standard. To rest the land, Comal Appraisal District requires written notice each year by April 30 and allows no more than 2 years of rest in a 7-year period, outside of drought proclamations.
6. Report changes. Form 50-129 requires notice by the April 30 after a change in use or eligibility, and failing to notify can bring a penalty.

Form 50-129 also describes extra filing time when a new owner keeps the land in materially the same use, run by the same people. If that fits your purchase, I’d confirm it with the district rather than rely on it.

Rollback taxes under current law

For 1-d-1 land, the rollback is triggered when agricultural use stops or the land is diverted to another use. The Comptroller’s Manual for the Appraisal of Agricultural Land says selling the land does not trigger it, and if only part of the property changes use, the rollback applies only to that part.

The rollback equals the difference between the taxes paid at productivity value and the taxes that would have been paid at market value, for each of the three years before the change.

Those rules have changed twice in recent years:

• In 2019, HB 1743 cut the look-back from five years to three and lowered the interest rate from 7% to 5%, as the Texas Agriculture Law blog at Texas A&M AgriLife summarized.
• In 2021, HB 3833 removed the interest from open-space rollbacks entirely, according to the Comptroller. Penalty and interest now apply only if the rollback bill goes delinquent.

Losing ag value and owing rollback are two different things.

Under the Comptroller’s guidance, land that stays in agriculture but falls below the local standard loses the special appraisal and is taxed at market value going forward, without a rollback. When the use does change, whoever owns the land on that date is personally liable, and a lien attaches to the land.

Building a home on ag land needs its own conversation. Comal Appraisal District assigns residential land around a house, and the Comptroller’s manual has specific rules for land that becomes part of a residence homestead.

Ask the district before you build. Comal Appraisal District will calculate a rollback estimate on written request.

If you’re weighing this

Ag valuation can change what a property costs to hold, but only if the use is real and you’re ready to keep it up. If you have a specific tract in mind, send me a note and we can line up the right questions for the appraisal district together.