How Do Bexar County Property Taxes Affect Your Home Sale in 2026?
In Bexar County, property taxes run 2.0–2.5% of assessed value annually — roughly $20,000–$25,000 per year on a $1 million home. When buyers calculate the true cost of owning your home, that number matters as much as the mortgage payment. In 2026, Bexar County moved to biennial appraisals, meaning assessed values will only be updated every two years. If your home is over-assessed relative to the current softening market, that inflated tax bill becomes part of every buyer's monthly cost calculation — and a quiet drag on your competitiveness as a seller. The homestead exemption also does not transfer at closing; buyers must re-apply, and the tax impact during that gap falls on them.
Most sellers in San Antonio focus on the price. The right price, the right positioning, the right marketing. What fewer sellers think about is the tax line on a buyer's monthly budget sheet — and in 2026, that number has become more complicated, more consequential, and more worth understanding before you list.
Bexar County made two significant changes this year. The biennial appraisal system launched, locking assessed values in place for two years at a time. And the City of San Antonio is proposing its first property tax rate increase in 33 years. Add those to a luxury market where buyers are already doing more due diligence, running more numbers, and sitting on decisions longer than they did two years ago — and property taxes deserve a seat in your pre-listing conversation.
Here's what sellers in Alamo Heights, Terrell Hills, Olmos Park, Monte Vista, and the surrounding 78209/78212 corridor should understand before they go active.
Why Property Taxes Matter More Than Sellers Expect
In Texas, property taxes are the largest ongoing cost of homeownership after the mortgage itself. Bexar County's effective rate typically lands between 2.0% and 2.5% of assessed value — depending on which taxing entities apply to your property. For a home assessed at $1 million, that's $20,000 to $25,000 per year, or roughly $1,700 to $2,100 per month added to the buyer's carrying cost.
Sophisticated luxury buyers — which is the majority of the audience in the Tri-Cities market — don't just calculate the mortgage. They calculate PITI: principal, interest, taxes, and insurance. A monthly mortgage payment on a $900,000 loan at 6.75% runs about $5,840. Add $1,800 in monthly property taxes and $250 in homeowner's insurance, and the real monthly cost of that home is over $7,800. That number drives decisions, and sellers who don't think about it are pricing with incomplete information.
What makes this a seller issue — not just a buyer issue — is that your BCAD assessed value directly shapes what buyers will calculate as the ongoing cost of your home. If your assessment is accurate and your asking price reflects current market value, you're fine. If your home is over-assessed relative to where the market has actually moved, you're asking buyers to absorb a higher effective tax rate than comparable homes. That can be the invisible reason a deal moves slowly or doesn't come together at all.
P. O'Connor, one of Texas's largest property tax consulting firms, estimates that approximately 45% of Bexar County residential properties are currently overvalued by BCAD. In a year when actual market values have softened — average Bexar County home values dipped 0.11% in 2026, per BCAD's own data, with real market declines closer to 2.5–3.9% — those assessments haven't always followed. That gap between assessed value and actual market value is the seller's problem more than they realize. For related context, see our analysis of San Antonio's $1M+ home market and what the latest data reveals.
What the Biennial Appraisal System Changes in 2026
For most of San Antonio's history, BCAD reassessed market values every year. Starting in 2026, that cadence shifted: BCAD now only updates market values in odd-numbered years. The value in place right now — whether it accurately reflects the current market or not — will carry forward through 2027.
There are a few things worth knowing about how this plays out:
If you or a previous owner successfully protested in 2025, that reduced value automatically rolled over to 2026. You didn't need to re-protest. That lower assessed value will hold for two years — a meaningful advantage for sellers whose homes were adjusted downward when the market was cooling.
If you didn't protest and your assessed value is high, it's going to stay high for two years. The protest deadline for 2026 was May 15 (or 30 days after your Notice of Appraised Value). For most homeowners, that window has closed. What you're left with is the assessed value that will follow your property — and your buyers' carrying cost calculations — through at least 2027.
The City of San Antonio is also weighing a rate increase for the first time in 33 years. If that passes later this year, it compounds the impact of any over-assessment. Buyers in the luxury segment will be tracking this closely. Our overview of why overpricing costs sellers is worth reading alongside this — the same dynamics apply to hidden carrying costs.
The Homestead Exemption Gap at Closing
One of the most overlooked property tax issues in any home sale is what happens to the seller's homestead exemption at closing. Here's the short version: it doesn't transfer.
The Texas homestead exemption — currently $140,000 off the assessed value for school district taxes, thanks to Proposition 13 passed in November 2025 — is tied to the owner, not the property. When you sell, your exemption ends. The buyer must apply for their own exemption after they take ownership. Until they do, they're paying taxes on the full assessed value with no school district exemption.
On a $1 million home, the school district exemption alone reduces taxable value by $140,000. Depending on the applicable school district rate, that's $2,800 to $3,500 per year in tax savings — or about $230 to $290 per month. A buyer who doesn't apply immediately (and many don't, especially first-time luxury buyers who aren't aware of the deadline) absorbs that full cost for however long they wait.
This is a legitimate talking point in buyer negotiations. We often advise buyers to factor this into their first-year budget and make sure they understand the April 30 application deadline. For a full explanation of the exemption and how to apply, our post on the Texas homestead exemption covers it in detail.
What Sellers Can Do Right Now
If your home is on the market or headed there, there are practical steps to take:
Pull your BCAD record. Look up your property at bcad.org and find your current assessed value. Compare it to what you're pricing your home at, and to recent sold comps in your neighborhood. If your assessed value is significantly higher than where comparable homes are actually closing, that's worth knowing — and worth addressing in how you frame the listing to buyers.
Be transparent with buyers about tax prorations at closing. In Texas, property taxes are paid in arrears and prorated by the title company at closing. The seller covers taxes through the closing date; the buyer picks up from there. The proration is typically based on the prior year's rate as a placeholder — if the current-year rate comes in higher (which is possible given the proposed city rate increase), the difference gets sorted per contract terms. Buyers who know this upfront are less likely to be rattled by it during the transaction.
Remind buyers to apply for the homestead exemption promptly. You can't apply for them, but you can make sure they know it's available and time-sensitive. It's one of the most actionable things a buyer can do to lower their carrying costs after closing. Your agent should have this conversation as a routine part of buyer guidance.
If you're thinking about listing your home in Alamo Heights, Terrell Hills, Olmos Park, or Monte Vista and want to talk through how your BCAD assessment affects your competitive position, start with a complimentary home valuation at consumer.hifello.com — we'll use it to run the full picture with you. Or schedule 30 minutes with Caroline and Susanne. This is exactly the kind of conversation we have before a listing goes live.
Frequently Asked Questions
How do property taxes affect my home sale in San Antonio?
Property taxes in Bexar County run roughly 2.0–2.5% annually — $20,000–$25,000 per year on a $1 million home. Buyers calculate total monthly carrying costs, not just the mortgage. An over-assessed property makes your listing harder to close because buyers face a higher effective cost than comparable homes, even if your asking price is accurate.
What is Bexar County's biennial appraisal and why does it matter in 2026?
Starting in 2026, BCAD only reassesses market values every two years — odd years only. The value in effect now carries forward through 2027. If your home is over-assessed, that elevated tax burden follows buyers for two full years. BCAD returns to annual reappraisal in 2027, making 2026 a unique window where a high assessed value has outsized staying power.
Does the homestead exemption transfer when I sell my home in Texas?
No. The Texas homestead exemption is tied to the owner, not the property. When you sell, your exemption ends. The buyer must apply for their own after closing. For a $1 million home, the school district exemption ($140,000 under Prop 13) saves roughly $2,800–$3,500 per year — buyers who don't apply promptly pay taxes at the full unexempted rate in the interim.
Can an over-assessed property hurt my chances of selling in San Antonio?
Yes, especially in the luxury segment. P. O'Connor estimates 45% of Bexar County residential properties are currently overvalued by BCAD. In a market where 57.9% of San Antonio sellers have already cut their list price — the highest rate among the 50 most populous U.S. metros — buyers are scrutinizing every line of carrying cost. An inflated assessment is a headwind, even when the asking price is right.
How are property taxes handled at closing in Texas?
Property taxes are paid in arrears and prorated at closing. The seller pays taxes through the closing date; the buyer takes over from there. The title company calculates the proration based on the prior year's tax rate as a placeholder. If the current-year rate comes in higher — which is possible given San Antonio's proposed rate increase — the parties address it per contract terms.
