How to Apply for Ag Exemption in Texas: Form 50-129 and Deadlines

To apply for the ag exemption in Texas, file Form 50-129, the Application for 1-d-1 (Open-Space) Agricultural Use Appraisal, with your county appraisal district by April 30 of the tax year you want the appraisal to take effect.¹ Before you file, confirm the land meets three tests: it is principally used for agriculture, at the level of intensity your county considers typical, and it has been used that way for at least five of the last seven years.²

One thing to understand before you start. The “ag exemption” is not really an exemption. You still pay property tax on the land. What changes is how the county calculates the taxable value: instead of market value, the appraisal district uses a productivity value based on what the land can earn agriculturally. That productivity figure is almost always far lower than market value, which is where the tax savings come from.

Confirm You Qualify Before You File

Three requirements decide eligibility, and all three have to be met.

The first is primary use. The land’s principal purpose must be genuine agricultural production — a garden or a few backyard chickens doesn’t count. The activity has to be recognizable as farming, ranching, or timber production carried out with the intent to produce income or agricultural products. Texas defines “agricultural use” broadly, and qualifying activities include cultivating crops for food, feed, or fiber; raising livestock or exotic animals for commercial products; growing flowers, grapes, or nursery stock; and leaving land idle as part of a government conservation program or a normal crop-rotation cycle. Beekeeping also qualifies, but only on parcels between 5 and 20 acres.³

The second is degree of intensity. Your operation has to match what’s typical for that activity in your area, and each county appraisal district sets its own standards. Grazing land may have a minimum animal-unit-per-acre ratio; cropland may have a minimum level of cultivation. Two head of cattle on 100 acres in a county that expects one animal unit per 15 acres will not pass. Call your county appraisal district and ask for its intensity standards before you invest in the operation or the application.

The third is history. The land must have been devoted to agriculture for at least five of the preceding seven years.² Land inside a municipality’s city limits may need five continuous years of agricultural use.¹

Filling Out and Filing Form 50-129

The application is officially titled the “Application for 1-d-1 (Open-Space) Agricultural Use Appraisal,” Form 50-129.² Most county appraisal districts post it on their websites, and it’s also available from the Texas Comptroller.

File it with the chief appraiser at the county appraisal district where the property is located. You can deliver it in person or mail it; if you mail it, the envelope needs to be postmarked by the deadline.

The form asks for your name and contact information, a legal description of the property, total acreage, and a detailed breakdown of how the land has been used agriculturally over at least the past five years. Be specific. List the type of operation, the acres dedicated to each activity, and the years of use. Supporting documentation carries real weight here. Include receipts for feed, seed, or equipment; photos of the operation; copies of any agricultural leases; livestock records; and anything else that shows the land is actually being farmed or ranched at the intensity your county expects.

If you lease the land to someone else who farms or ranches it, the Comptroller’s manual tells appraisers to look for arm’s-length lease arrangements. Leases between family members, long-term leases with purchase options, or below-market deals can draw scrutiny because they may not reflect the land’s actual productive capacity.⁴

The form also asks for your Ag/Timber Number. That’s a separate registration issued by the Comptroller that lets you buy qualifying farm supplies without paying state sales tax. It isn’t required to apply for the property tax appraisal, but the two benefits are closely tied. The fastest way to get one is the Comptroller’s online portal, which issues a number instantly. Paper filers use Form AP-228 and should expect three to four weeks.⁵ Ag/Timber Numbers must be renewed every four years regardless of when they were first issued, and current numbers expire December 31, 2027.⁶

The April 30 Deadline and What Late Filing Costs

An initial application is due by April 30 of the tax year you’re seeking the appraisal for.¹ Late applications are still accepted, but they come with a penalty equal to 10 percent of the difference between the taxes you would have paid at market value and the taxes owed under the agricultural appraisal. That penalty is added to your tax bill for the year. Miss the year entirely and the earliest the appraisal can take effect is the next tax year. Put the date on the calendar now.

After You File: Approval, Denial, and Protests

The appraisal district will review the application and either approve it, deny it, or ask for more information. If they request additional documentation, respond quickly. Not answering is a common path to denial.

If the application is denied, you have the right to protest to your county’s Appraisal Review Board. File a written notice of protest by May 15 or within 30 days of receiving the denial notice, whichever is later.⁷ Both you and the appraisal district present evidence and testify under oath at the hearing, and you exchange hearing materials either before or at the start. Bring the same kind of proof that strengthens the initial application: seasonal photos, receipts, leases, livestock records, and any correspondence with the district.

Keeping the Appraisal After Approval

You don’t re-file the application every year. But the land has to keep meeting the same standards that qualified it — principal agricultural use at the county’s expected intensity. Appraisal districts can inspect, and some counties require an annual affidavit confirming ongoing use. If the way you use the land changes, you must notify the chief appraiser in writing.²

Filing a false application carries real consequences beyond losing the appraisal. It can be prosecuted as tampering with a governmental record under Texas Penal Code 37.10, a Class A misdemeanor, or a state jail felony if the intent was to defraud.⁸

Rollback Taxes If You Stop Using the Land for Agriculture

This one catches people. If land receiving the agricultural appraisal shifts to a non-agricultural use, the owner who makes the change owes the difference between what was paid under the agricultural valuation and what would have been paid at full market value for each of the three previous years.² If the appraisal was saving you $5,000 a year, that’s roughly $15,000 due at once.

Common triggers include subdividing for development, putting up a commercial structure, or simply stopping agricultural activity. Building a home on agricultural land generally triggers the rollback too, because residential use is not on the exceptions list. The Tax Code does exempt a few situations: right-of-way sales or condemnation, transfers to a government entity for public use, oil and gas operations, and certain nonprofit uses such as cemeteries, religious organizations, qualifying charities, and schools.

Buying Land That Already Has the Appraisal

An existing agricultural appraisal does not automatically continue when the property changes hands. The current valuation carries through the rest of the tax year of the sale, but a new owner has to file a fresh Form 50-129 by April 30 of the following year to keep it going.¹ There is a narrow exception when the new owner uses the land the same way and the same individuals continue running the operation, in which case a late application can still be accepted by the later of the tax delinquency date or the first anniversary of the transfer. But that “same use, same individuals” standard is strict — buying a cattle ranch and switching to hay wouldn’t qualify. Add the re-application deadline to your closing checklist.

A Note on Wildlife Management

Wildlife management valuation is available, but only as a conversion from land that was already qualified and appraised as agricultural or timberland the prior year.⁹ Bare land or residential property cannot go straight to wildlife management. If that’s your eventual goal, the agricultural appraisal is still your starting point.

1
Texas Comptroller of Public Accounts. Application for 1-d-1 (Open-Space) Agricultural Use Appraisal Form 50-129
2
Texas Comptroller of Public Accounts. Agricultural, Timberland and Wildlife Management Use Special Appraisal
3
State of Texas. Texas Tax Code 23.51 – Definitions
4
Texas Comptroller of Public Accounts. Manual for the Appraisal of Agricultural Land
5
Texas Comptroller of Public Accounts. AP-228 Application for Texas Agriculture and Timber Exemption Registration Number
6
Texas Comptroller of Public Accounts. Agricultural and Timber Exemptions
7
Texas Comptroller of Public Accounts. Property Owner Protest Hearings
8
State of Texas. Texas Penal Code 37.10 – Tampering With Governmental Record
9
Texas Comptroller of Public Accounts. Guidelines for Qualification of Agricultural Land in Wildlife Management Use