Tax Protests for San Antonio Landlords

Key Takeaways

Investment properties do not receive the 10% homestead appraisal cap — BCAD can increase your assessed value by any amount year over year, with no statutory limit after 2026.
The 20% temporary appraisal cap for non-homestead properties (Proposition 4, 2023) expires December 31, 2026 — making this protest cycle the last one with that buffer in place.
The income approach — valuing a property based on what it actually earns as a rental — is a powerful protest strategy available to investors but rarely used by homestead owners.
At San Antonio's combined tax rate of ~2.3%, a $50,000 overassessment on a rental property costs $1,150 per year — money that comes directly out of your net operating income.
Investors who own multiple properties should protest every parcel — each one has its own filing deadline and each reduction compounds across your portfolio.
No homestead exemption, no $140,000 school district exemption, no over-65 freeze — investment properties pay full freight on every dollar of assessed value.

December 31, 2026Deadline: 20% non-homestead appraisal cap expires permanently

Proposition 4 (November 2023) created a temporary 20% annual appraisal cap for non-homestead properties valued at $5 million or less. The provision sunsets December 31, 2026, after which no statutory cap limits annual increases for investment properties.
Texas Proposition 4, SB 2 (2023); Texas Tax Code §23.231

If you own rental property in San Antonio, you are paying significantly more per dollar of assessed value than your homestead-owning neighbors — and you have fewer protections against value increases. Yet the majority of investor-owned properties in Bexar County are never protested. That changes with understanding the tools available to you.

Decision guide

The protest landscape is fundamentally different for investment properties. Here is how the two categories compare.

After December 31, 2026, there is no statutory limit on how much BCAD can increase the assessed value of a non-homestead property in a single year. If your investment property is currently under-assessed and you have been protected by the 20% cap, that protection disappears entirely. Protesting now — and locking in a lower base value — is the single most important financial decision you can make for your rental portfolio this year.

No homestead cap means unlimited exposure

Texas Tax Code §23.23 limits annual increases in the appraised value of a residence homestead to 10% per year (plus the value of new improvements). This cap has been in place since 1997 and is permanent.

Investment properties receive none of this protection. Before Proposition 4, there was no cap at all — BCAD could double or triple an investment property's assessed value in a single year if the model produced that result. Proposition 4 created a temporary 20% annual cap for non-homestead properties valued at $5 million or less.

But "temporary" is the key word. The 20% cap is set to expire December 31, 2026. Unless the Texas Legislature renews or replaces it, starting January 1, 2027, BCAD will again have unlimited authority to increase non-homestead appraised values.

Consider what this means in practice. An investment property assessed at $280,000 in 2026 could — in theory — be reassessed at $350,000 or higher in 2027 with no cap limiting the increase. At a 2.3% combined rate, a $70,000 jump costs an additional $1,610 per year in property taxes.

$0Homestead exemptions available to investment property owners — every dollar is taxed

Investment properties also receive no homestead exemptions. While your homestead-owning neighbor gets $140,000 off their school district taxable value and 20% off city and county taxes, your rental property is taxed on every dollar of assessed value. On a $280,000 property, the homestead exemptions alone save a homestead owner roughly $2,200 per year — savings your investment property never receives.

The income approach: your strongest weapon

Homestead owners are essentially limited to two protest arguments: market value (comparable sales) and unequal appraisal (equity comps). Investment property owners have access to a third — and often the most powerful — argument: the income approach.

The income approach values a property based on the income it actually generates. The formula is straightforward:

Property Value = Net Operating Income ÷ Capitalization Rate

Where:

Net Operating Income (NOI) = Annual gross rental income minus operating expenses (property management, maintenance, insurance, vacancy loss — but NOT mortgage payments or depreciation)
Capitalization rate (cap rate) = The market rate of return investors expect for similar properties in the area

If your property generates $18,000 per year in gross rent, has $6,000 in operating expenses (management, repairs, insurance, taxes excluded), and the local cap rate for similar rentals is 6.5%, the income approach produces:

$12,000 NOI ÷ 0.065 = $184,615

If BCAD has that property assessed at $280,000, the income approach reveals a $95,385 gap — potential savings of over $2,193 per year at a 2.3% rate.

Document your actual rental income and expenses carefully. Bring lease agreements, property management statements, repair receipts, and vacancy records to your hearing. The income approach is strongest when backed by real financial documentation — not projections or estimates.

Texas Tax Code §23.012 authorizes the income approach as one of three recognized methods for determining market value. The appraisal district must consider all three approaches — cost, market (sales comparison), and income — when applicable to the property type.
IAAO Standard on Mass Appraisal; Texas Tax Code §23.012

Math example: the full picture

Here is how a typical San Antonio rental property protest using the income approach compares to a homestead protest.

The investment property generates a larger per-dollar reduction because the income approach often reveals a wider gap than comparable sales alone. But the investment property still pays a higher total bill because it receives no exemptions.

The income approach works even when comparable sales suggest a higher value. A property might sell for $280,000 to an owner-occupant but only be worth $230,000 to a rational investor based on its rental income. Both values are "market value" — they just reflect different markets. As an investor, you are in the income-producing market, and your property should be valued accordingly.

Portfolio strategy: protest every property

If you own multiple investment properties in Bexar County, each one is a separate protest opportunity. There is no volume discount from BCAD — but there is also no penalty for filing multiple protests.

Key considerations for portfolio owners:

Each property has its own filing deadline. The standard deadline is May 15, 2026, or 30 days after you receive that property's Notice of Appraised Value — whichever is later. Track each property separately.
Evidence is property-specific. Each property needs its own comparable sales, equity comps, or income analysis. A comp grid for a 3-bedroom in Stone Oak does not help your 2-bedroom in Southtown.
Aggregate savings compound. Five properties with $30,000 reductions each produce $150,000 in total reduction — roughly $3,450 per year in savings across the portfolio. Over the two-year rollover period, that is $6,900.
Consider professional representation. Managing multiple protests, hearings, and evidence packages is time-intensive. A representative who handles all properties under a single engagement saves hours of scheduling and preparation.

For a complete walkthrough of the protest process, deadlines, and filing options, see our step-by-step guide to protesting property taxes in San Antonio. For current tax rate breakdowns by entity, including school district rate comparisons and exemption details, see our 2025 tax rates guide.

The 2026 protest deadline of May 15 applies to all property types — homestead and investment alike. Do not miss it.

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Methodology

All data in this guide is sourced from primary government, legal, and institutional sources.

Appraisal cap provisions (10% homestead cap under §23.23, 20% non-homestead cap under Proposition 4/SB 2) are from the Texas Property Tax Code and the Texas Legislature's official bill text. The December 31, 2026 sunset date is specified in the legislation.

Income approach methodology follows the IAAO Standard on Mass Appraisal and Texas Tax Code §23.012, which authorizes cost, market, and income approaches for property valuation. Example cap rates and NOI figures are illustrative and representative of San Antonio's rental market.

Tax rate calculations use the approximate combined rate of 2.3% per $100 for a typical San Antonio property, based on Tax Year 2025 published rates from Bexar County.

Exemption savings estimates are calculated from the official Bexar County 2025 Tax Rates and Exemptions document.

Sources:

Common questions

Can I protest the property taxes on a rental or investment property?

Yes. Texas law gives every property owner the right to protest, regardless of whether the property is owner-occupied, rented, vacant, or commercial. The process is identical — file before May 15 (or 30 days after your Notice of Appraised Value), present evidence at an informal hearing, and proceed to the ARB if needed. Investment properties actually have access to an additional protest argument — the income approach — that homestead owners typically cannot use.

What is the income approach to property valuation?

The income approach values a property based on its net operating income divided by a market capitalization rate. For example, a rental property generating $12,000 in annual net operating income in a market with a 6.5% cap rate would be valued at approximately $184,615. This method is recognized under Texas Tax Code §23.012 and is particularly powerful for rental properties where the income-based value is significantly lower than the assessed value.

When does the 20% non-homestead appraisal cap expire?

The 20% annual appraisal cap for non-homestead properties — created by Proposition 4 (SB 2) in November 2023 — expires December 31, 2026. After that date, there is no statutory limit on how much BCAD can increase the assessed value of an investment property in a single year. The permanent 10% homestead cap under Tax Code §23.23 is unaffected and remains in place.

Do I need a different form to protest an investment property?

No. Investment properties use the same Form 50-132 (Notice of Protest) as homestead properties. The filing deadline, process, and hearing procedures are identical. The difference is in the evidence you present — investment property owners can supplement comparable sales and equity comps with income documentation (lease agreements, NOI statements, cap rate analysis) to support the income approach.

Should I protest every property I own?

Yes. Each property is assessed independently, and each protest is evaluated on its own evidence. There is no penalty for filing multiple protests, and each successful reduction compounds across your portfolio. A $30,000 reduction across five properties saves roughly $3,450 per year total. File each one before its individual deadline — May 15, 2026, or 30 days after that property's Notice of Appraised Value.