Texas has no state income tax, but it has some of the highest property tax rates in the country — and inside San Antonio, those rates vary by ZIP code, school district, and special district enough that two identical homes a mile apart can carry tax bills $4,000+ apart per year. This is the deep guide to how San Antonio property taxes actually work, why they vary so much, what the homestead exemption saves you, and how to protest your appraisal if it comes in too high.
I'm Veronica Casias, a residential realtor with Real Broker. Property tax surprise is the most common regret I hear from out-of-state buyers in their first year here. Buyers from California, Washington, or the Northeast are used to thinking about property tax as 1% or less of home value. In San Antonio it can be nearly 3%. That's a $3,000-vs-$9,000 annual difference on a $300,000 home — real money that affects what you can actually afford.
The 30-second framework
Combined effective rate in San Antonio: typically 2.0%–2.9% of property value, depending on which school district and special districts your home falls inside.
Annual tax bill on a $300,000 home: typically $6,000–$8,700.
Homestead exemption: If the home is your primary residence, the homestead exemption typically saves $700–$1,500/year and caps your appraised-value increases at 10% per year going forward.
Tax bill goes up automatically each year as appraised values rise. You can protest. You should protest.
The tax bill is rolled into your monthly mortgage payment via escrow if you have a loan. Plan for $500–$725/month on a $300K home, on top of principal and interest.
How San Antonio property taxes actually work
Multiple taxing entities, one bill
Your annual tax bill isn't one tax. It's the sum of taxes levied by every governmental entity that covers your property:
City of San Antonio — currently $0.54159 per $100 of taxable valuation. (City rate has been held steady the last few years.)
Bexar County — county-level taxes for roads, courts, sheriff, and county services.
Your school district — usually the largest single component. Rates vary by district. Alamo Heights ISD, NEISD, NISD, SAISD, Boerne ISD, and Comal ISD each set their own rate.
Bexar County hospital district — funds University Hospital and county health services.
Alamo Community College District — funds the community college system.
Special districts (if applicable) — Municipal Utility Districts (MUDs), Public Improvement Districts (PIDs), Emergency Services Districts (ESDs). Many newer subdivisions sit inside one or more of these.
The Bexar County Tax Assessor-Collector consolidates all of these into one annual bill, but the breakdown is itemized so you can see exactly where your money goes.
Why neighborhood-by-neighborhood variance is so dramatic
Two examples illustrate the spread:
78205 (downtown San Antonio): median effective rate around 2.58%.
78237 (west side): 1.11%.
That's a 1.47 percentage-point spread inside the same city. Most of the variance comes from school district levies (which differ significantly across districts) and from whether the address sits inside a special district.
A house in a Stone Oak NEISD subdivision with no MUD or PID typically runs around 2.4% combined. A house in an Alamo Ranch new-construction subdivision with a PID can push 2.9%. A historic home in Monte Vista (SAISD) might run 2.5%.
The Texas homestead exemption — the most important tax rule for owner-occupants
What it is
The Texas homestead exemption reduces the taxable value of your primary residence. It also caps annual increases in your appraised value at 10% per year (the "10% cap"), which protects you from explosive tax bill jumps when your neighborhood appreciates fast.
What it saves you
The general homestead exemption is $100,000 off the school district portion of your taxable value (that amount has been increasing in recent years). On a $300,000 home with a school district levy around 1.0%, that's $1,000/year in savings on the school component alone. Combined with smaller exemption amounts at the city, county, and other entities, total savings typically run $700–$1,500/year on a typical San Antonio home.
The 10% cap
Once you've claimed the homestead exemption on a home for at least one year, your appraised value can't increase by more than 10% in any single year. In a fast-appreciating neighborhood, this cap protects you from your tax bill jumping 20%+ year over year. The market value can keep climbing on the appraisal records, but the taxable value (capped value) climbs more slowly.
Other exemption types
Over-65 exemption: Additional reduction in taxable value for homeowners 65+. Also freezes school district taxes at the level they were when you turned 65.
Disability exemption: Similar to over-65 for disabled homeowners.
Disabled veteran exemption: Substantial — up to 100% exemption for veterans rated 100% disabled by the VA. This is one of Texas's most generous tax benefits for veterans.
Surviving spouse exemptions: Available for surviving spouses of disabled veterans, first responders killed in line of duty, and active-duty military killed in action.
How to claim the homestead exemption
File Form 50-114 with the Bexar Appraisal District (bcad.org) any time after you close on the home and start using it as your primary residence. The exemption is retroactive to the date you began using the home as your primary residence, which means new buyers can file for the partial-year exemption immediately after closing.
Texas now allows filing online at bcad.org. Filing takes about 10 minutes. Do this immediately after closing. Most title companies remind you, but many buyers still forget for a year and lose the savings.
How the appraisal process works
Step 1: BCAD assesses every property annually
The Bexar Appraisal District values every property in the county each year, typically as of January 1. Notices of appraised value go out in April. The notice tells you the appraised value the BCAD has assigned, which becomes the basis for your tax bill.
Step 2: You have until mid-May to protest
If the appraised value seems too high — or higher than comparable nearby sales — you have until May 15 (or 30 days after the notice was mailed, whichever is later) to file a protest. About 30%–40% of San Antonio homeowners protest in any given year. Of those, roughly half achieve some reduction.
Step 3: Tax rates are set in the fall
Each taxing entity sets its rate for the year in late summer/early fall, usually after public hearings. Once rates are finalized, your final tax bill is calculated.
Step 4: Tax bills are mailed in October
You can pay anytime October through January 31. Bills are due by January 31 of the following year without penalty. After January 31, penalty and interest start accruing.
Step 5: Escrow handles it (usually)
If you have a mortgage, your lender typically collects 1/12 of the estimated annual tax in your monthly payment, holds it in escrow, and pays the bill on your behalf. You don't see the bill — but you see the impact in your payment.
How to protest your San Antonio property tax appraisal
This is one of the highest-ROI uses of an afternoon in Texas. The basic process:
1. Get the BCAD notice and your evidence ready
The protest is almost always about whether the BCAD's appraised value matches the market value of your home. Pull recent comparable sales (last 6 months, within 0.5 miles, similar square footage and age) from the MLS, Zillow, or your realtor. If your home would sell for less than BCAD says it's worth, you have a case.
2. File the protest
Online at bcad.org, by mail, or in person. The protest form is simple. You don't need a lawyer.
3. Choose your protest path
You can do informal review (an online or in-person conversation with a BCAD appraiser, usually quick) or go straight to the Appraisal Review Board (ARB) hearing.
4. Present your evidence
Show your comps. Note any condition issues that lower your home's value (foundation cracks, roof age, deferred maintenance). Photos help.
5. Get a decision
The BCAD or ARB issues a decision. If you accept, your appraised value is updated. If you don't, you can pursue arbitration or, in some cases, judicial review.
The professional protest companies
Several services (Ownwell, ProTax, Republic Property Tax Consultants) will protest your bill on your behalf for a contingency fee — usually 25%–50% of the first-year savings. This is a reasonable trade-off if you don't want to handle the protest yourself. Their success rates are similar to a well-prepared DIY protest.
The real numbers — examples by neighborhood
Approximate annual tax bills on a $400,000 home, after general homestead exemption, by location (these will shift as rates change but the rank order is stable):
Inside Alamo Heights ISD (78209): ~$10,800–$11,600/year. AHISD's rate is on the higher end among local districts.
Inside NEISD/NISD (typical Stone Oak / Helotes / Alamo Ranch without PID): ~$9,200–$10,400/year.
Inside Boerne ISD (Boerne city limits): ~$9,000–$10,200/year. Lower municipal rate but Boerne ISD's school rate is competitive.
Inside Comal ISD (Bulverde, parts of NB): ~$9,000–$10,000/year. Strong value-to-rate ratio.
Inside SCUCISD (Schertz/Cibolo/Universal City): ~$9,400–$10,200/year. New construction may add PID.
Inside SAISD (Monte Vista, Tobin Hill): ~$9,800–$10,800/year.
Alamo Ranch new construction with PID: ~$11,200–$12,400/year due to the PID assessment.
MUDs and PIDs — the special-district trap
A subset of San Antonio neighborhoods sit inside Municipal Utility Districts or Public Improvement Districts. These districts levy additional taxes to fund infrastructure — water, sewer, roads, amenities — in newer subdivisions where the city hasn't extended services or where developers preferred to finance infrastructure with bonds.
The math: A MUD or PID can add 0.3%–0.7% to your effective tax rate, on top of city/county/school taxes. On a $400K home, that's an extra $1,200–$2,800/year.
Where they're common: Many far-northwest subdivisions (parts of Alamo Ranch), parts of Cibolo, parts of Bulverde, parts of New Braunfels and Comal County subdivisions. Always ask before you buy.
How long they last: MUDs and PIDs typically have a defined bond payoff period — often 20–30 years. Once the bonds are retired, the assessment can drop or be eliminated. But that's decades away on most newer districts.
Disclosure: Texas law requires sellers to disclose if a property is in a MUD or PID. Check the seller's disclosure carefully and verify with the title company.
Strategies to lower your San Antonio property tax bill
1. File for the homestead exemption immediately after closing. Most straightforward step, biggest single savings.
2. Protest your appraisal every year. Even if you only succeed every other year, the savings compound.
3. Apply for additional exemptions you qualify for. Over-65, disability, disabled veteran — these stack on top of homestead.
4. Document any property issues that affect value. Foundation problems, roof age, deferred maintenance — these legitimately lower value and support a lower appraisal.
5. Don't volunteer information that increases your value. If you renovated the kitchen and didn't pull permits, that work isn't on the BCAD's radar. There's no obligation to volunteer it during a protest.
6. Time major capital improvements carefully. Major renovations will eventually be reflected in your appraised value. Plan around the assessment cycle.
Frequently asked questions
What is the property tax rate in San Antonio?
Combined effective rates typically run 2.0%–2.9% of property value, depending on the school district and any special districts. The City of San Antonio rate alone is currently $0.54159 per $100 of taxable valuation.
Are property taxes high in San Antonio?
By national standards, yes. Texas has no state income tax, but compensates with higher property tax rates than most states. San Antonio specifically is in the middle of the Texas range — lower than many DFW suburbs, comparable to Austin metro, higher than most Houston-area suburbs.
How do I lower my property taxes in San Antonio?
The two highest-impact moves: file for the homestead exemption immediately after closing, and protest your annual appraisal whenever the BCAD's value seems higher than market value.
How much does the Texas homestead exemption save?
Typically $700–$1,500/year on a typical San Antonio home, plus the long-term protection of the 10% appraised-value cap that prevents your tax bill from jumping with rapid neighborhood appreciation.
When are San Antonio property taxes due?
Bills are mailed in October. Payment is due by January 31 of the following year. Penalty and interest start accruing February 1.
Can I deduct San Antonio property taxes on my federal return?
Yes, but the federal SALT cap currently limits combined state and local tax deduction to $10,000/year. If your property taxes exceed $10,000, the excess isn't federally deductible. Talk to a CPA for your specific situation.
Does buying a home in a MUD or PID always mean higher taxes?
Yes — by definition. The point of a MUD or PID is to levy additional taxes to fund infrastructure or amenities. Always ask whether a home is in one, and how much the additional assessment is, before making an offer.
Should I buy in a high-tax neighborhood like Alamo Heights?
The total tax bill matters less than the "tax bill plus mortgage" total. In high-rate, high-value neighborhoods, the home itself often holds value better and the school district premium typically pays back at resale. The math depends on your specific situation.
Need help running the tax math on a specific property?
I can pull the exact tax bill history for any address in Bexar County, including the breakdown by taxing entity, any special districts, and the year-over-year trend. Send me the address. (210) 986-6557 or veronicatxrealtor@gmail.com.
About the author: Veronica Casias is a residential real estate professional with Real Broker, helping San Antonio homeowners understand the financial side of homeownership. Contact: (210) 986-6557 · veronicatxrealtor@gmail.com.