Scroll through acreage listings around Iola, Plantersville, or the King Oaks subdivision and you'll see it again and again: "currently ag exempt." It reads like a selling point, and it is one. What it doesn't tell you is what happens the day you stop qualifying for it.
Ask five people what a rollback tax costs in Texas and you'll likely get the same answer: five years of back taxes, plus 7 percent interest, as Ballard Property Tax Protest describes. That answer is wrong for most of the acreage currently for sale in Grimes County, and it's been wrong since 2019.
The Rule Everyone Quotes Is Outdated
The five-year, 7-percent-interest version of the rollback tax was real once. It described how Texas handled a change of use on agricultural land before the legislature rewrote the rule twice. House Bill 1743, effective September 1, 2019, cut the open-space rollback lookback from five years to three. House Bill 3833, effective June 15, 2021, went further and removed the interest charge entirely for that same open-space category, which is the classification Tax Code Subchapter D covers and the one that applies to nearly every acreage tract, hay field, and pastureland parcel currently listed in Grimes County.
The Texas Comptroller's own guidance on agricultural and timberland special appraisal confirms the current version: when land under an agricultural appraisal changes to a non-agricultural use, the rollback tax is due for each of the previous three years, calculated as the difference between what was paid under the agricultural valuation and what would have been paid at market value. Interest still applies to the older 1-d classification, the "bona fide farming operation" category that requires the land to be an individual's primary occupation and income source. It's rare, and it isn't what's driving most of the current listings around Anderson, Bedias, or Richards. Those are open-space, 1-d-1 tracts, and under current law they carry no rollback interest at all.
What That Difference Actually Means in Dollars
A widely cited industry example makes the gap concrete. Take a 25-acre tract with a market value of $750,000 and an agricultural value of $5,000, taxed at a combined rate of 2.5 percent. The annual difference between market-rate taxes and ag-rate taxes on that tract runs about $18,625. Under the old rule, five years of that difference plus 7 percent compounding interest could push a rollback bill past $100,000. Under the law that has actually governed open-space land since 2021, the same tract owes three years of that difference and nothing more, putting the bill closer to $55,875.
That's not a rounding error. It's the difference between a rollback exposure that could derail a purchase and one a buyer can plan around with a straight calculation. Grimes County's own appraisal district, which handles agricultural valuation and rollback questions for landowners in Navasota, Iola, Plantersville, Shiro, and the rest of the county, advises anyone considering a change of use to confirm rollback exposure before acting rather than assume figures from a generic guide.
Building on Part of a Tract Doesn't Roll Back the Whole Thing
A common Grimes County scenario looks like this: a buyer closes on 45 wooded acres near Iola, planning to carve out a homesite for a house or a barndominium and leave the rest in pasture or timber. The rollback only applies to the acreage that actually changes use. If the homesite and its immediate footprint run 3 to 5 acres, that's the portion the appraisal district recalculates at market value for the lookback period. The remaining 40 acres keeps its agricultural valuation as long as it continues to meet Grimes County's intensity standards.
This is the detail that matters most for anyone buying in subdivisions like King Oaks, Iola Acres, Pinebrook, or Timber Hills, where lots run from under an acre to several dozen. A 2-acre homesite lot inside a larger platted community presents a different case. But on the larger unrestricted tracts still common along the SH 249 Aggie Expressway corridor and further out toward Plantersville and Stoneham, where 12-, 45-, and 200-acre parcels are actively listed as ag exempt, the partial-conversion rule is the difference between a five-figure rollback and a bill on the whole property.
Who Actually Pays It at Closing
CIP Texas says rollback liability follows whoever changes the use, not necessarily whoever owned the land when the ag valuation was granted. In practice, that usually means the buyer, since the trigger is typically the buyer's construction, subdivision, or commercial development after closing. A sale by itself doesn't create a rollback bill if the new owner keeps the land in qualifying agricultural use.
That default isn't fixed. Rollback exposure is a negotiable item in a land contract like any other, and buyers who know they're planning to build should raise it before closing rather than after the appraisal notice arrives. If you're buying 87 acres near Lynn Grove with hardwoods and a creek and you intend to keep running cattle on most of it while building a home on a few acres, that's a very different negotiation than buying the same tract to subdivide into ten lots.
The Disclosure You're Entitled To
Texas law doesn't leave rollback exposure as something buyers have to discover on their own. State law requires specific disclosures regarding special appraisal eligibility in contracts for the sale of real property, a protection the State Bar of Texas has written about directly. If a Grimes County listing carries an agricultural valuation, that status should show up in your contract paperwork, not just in the marketing copy. If it doesn't, that's worth asking about before you sign.
The Navasota Wrinkle Worth Knowing
Anyone planning to subdivide acreage near Navasota should know the county isn't the only authority involved. Grimes County has an agreement under Texas Local Government Code Section 242.001 that lets the City of Navasota regulate subdivision development within its extraterritorial jurisdiction. Grimes County's subdivision rules require a 30-day public posting in the Navasota Examiner before the Commissioners Court can approve replats of previously platted property. A tract that looks like straightforward county land on a map may actually fall inside Navasota's ETJ, which means city rules, not just county infrastructure regulations, govern how it can be divided.
Before You Break Ground, Call Grimes CAD
Productivity values and intensity standards are set locally and reviewed annually, which means the exact dollar exposure on any given tract changes from year to year and can only be confirmed by the Grimes Central Appraisal District itself. Before converting any portion of an ag-valued tract, whether that's a homesite, a road, or a full subdivision plat, a call to the district is the only way to get numbers specific to that parcel rather than a statewide average.
Frequently Asked Questions
Does selling ag-exempt land trigger a rollback tax on its own? No. A sale alone doesn't trigger rollback under the open-space classification, as long as the new owner continues qualifying agricultural use.
If I build my own home on part of the tract, does the whole property roll back? Generally, only the acreage converted to the homesite is affected, and the remainder can keep its agricultural valuation if it still meets the county's intensity standards. Some guidance also notes that building a personal residence and maintaining it as your primary home for five years may avoid triggering rollback on that portion, though this is exactly the kind of case-specific question worth confirming with Grimes CAD before construction starts.
Who is legally on the hook, buyer or seller? By default, the party that changes the use owes the rollback, which in most transactions means the buyer after closing. It's a negotiable point, and raising it before signing is far easier than settling it after an appraisal notice shows up.
Rollback exposure on Grimes County acreage is real, but it's smaller and more manageable than most guides suggest, and it rewards buyers who ask specific questions before closing rather than after. If you're evaluating a tract near Iola, Plantersville, or Navasota and want a clear read on what a change of use would actually cost, Coldwell Banker Properties Unlimited can walk through the numbers on that specific parcel before you make an offer.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
