Sell or Rent Your San Antonio Home After a Relocation: A Decision Framework

If you're relocating out of San Antonio in the next 60–120 days, the decision to sell or rent isn't about sentiment or market timing. It's about three numbers: your capital gains exposure under IRC §121, your real cash flow after Bexar County taxes reset without the homestead cap, and how much distance you can tolerate between yourself and a 1998 water heater in Converse. Get those three right and the answer usually picks itself.

This piece is the framework I walk relocating owners through — whether they're PCSing out of JBSA-Randolph, moving for a corporate transfer from USAA or Valero, or following a spouse's job to Austin or Dallas.

Start with the IRS clock, not the spreadsheet

The single most expensive mistake relocating owners make is accidentally blowing the §121 primary-residence capital gains exclusion. The rule: if you've owned and used the home as your primary residence for at least 2 of the last 5 years before sale, you can exclude up to $250,000 of gain ($500,000 married filing jointly) from federal capital gains tax.

If you rent the house out, that 5-year window keeps running. Rent it for 3 years and a day after moving, and you've broken the 2-of-5 test. All that appreciation — taxable.

For a San Antonio owner who bought in 2019 or 2020 and has seen meaningful appreciation, this is often the decisive factor. You have roughly a 3-year window after moving out to sell and keep the full exclusion. After that, you're paying long-term capital gains plus Texas has no state income tax offset to soften it.

There's also a partial-exclusion provision for job-related moves of more than 50 miles, which can preserve a pro-rated exclusion even if you sell short of 2 years. Talk to a Texas CPA before assuming it applies — the IRS has specific tests.

The homestead exemption hit nobody warns you about

While you live in the home, Texas Property Tax Code §11.13 gives you the general residence homestead exemption plus — critically — the 10% annual appraised-value cap under §23.23. That cap is often worth more than the exemption itself in a market that's run hard.

The day the home stops being your homestead, both protections disappear. BCAD can reappraise to full market value the next cycle, and your tax bill can jump substantially in a single year. I've seen relocating owners project rent against their current escrow payment, then get hit with a tax increase in year two that erases their cash flow.

Before you decide to rent, pull your current BCAD notice, look at the gap between assessed and market value, and model the tax bill with that gap closed. That's your real carrying cost as a landlord, not the number on your mortgage statement today.

The San Antonio cash-flow math, honestly

Run the numbers in this order:

• Gross rent. Pull three comparable active listings and three leased comps in the same subdivision. SABOR-member agents can pull leased comps; public sites only show asking rent, which is optimistic.
• Minus vacancy. Budget 6–8% (roughly 3–4 weeks a year) in stable submarkets like Stone Oak (78258), Alamo Heights (78209), or the Schertz/Cibolo corridor. Budget more in areas with heavy new-build rental competition, like parts of far northwest 78254 or southeast 78109.
• Minus property management. Expect 8–10% of collected rent plus a leasing fee of half a month to a full month per new tenant. If you're moving out of state, this line is not optional.
• Minus maintenance and capex reserves. 1% of home value annually is the floor. On a 20-year-old house it's 1.5–2%.
• Minus taxes (at the post-homestead number), insurance (landlord policy, not homeowner — higher), HOA, and the mortgage P&I.

What's left is your real monthly cash flow. In most San Antonio submarkets, owners who bought before 2021 at sub-4% rates cash flow comfortably. Owners who bought in 2022–2023 at 6.5%+ often cash flow negative or break even, and are really betting on appreciation and principal paydown.

If you're negative $300 a month and the house is worth $350,000, you're paying $3,600 a year to hold an asset that may or may not appreciate faster than the S&P. Be honest about whether that's investing or sentimentality.

When renting actually wins

Renting is usually the right call when several of these are true:

• Your mortgage rate is under ~5% and would be expensive to replace.
• The house cash flows positive after a full reserve budget, not just P&I.
• You're within the 3-year §121 window and can revisit the sell decision before it closes.
• You have local support — a property manager you trust, or family who can respond to a call.
• The neighborhood has durable rental demand: proximity to JBSA gates, the Medical Center, UTSA, or a major employer corridor like I-10 West or US-281 North.
• You might move back. PCS returns to JBSA are common, and a corporate relo that reverses in 24 months makes selling-and-rebuying a $40,000 round trip in commissions, closing costs, and rate risk.

When selling is the cleaner answer

• You're near or past the §121 2-of-5 cutoff and have meaningful gain.
• You need the equity for the down payment on the next home.
• The house is older, the systems are aging, and you don't want to manage capex from 1,200 miles away.
• Cash flow is negative and appreciation is speculative.
• The neighborhood has structural issues — rising insurance, foundation-prone soils in parts of the far west and south sides, or flood concerns — that you'd rather not underwrite as a landlord.

If you sell, a relocating seller typically uses TREC 20-17 (One to Four Family Residential Contract (Resale)), the OP-H Seller's Disclosure Notice (required under Texas Property Code §5.008 — and yes, still required even if you've been renting it out; your knowledge as owner counts), and often a TREC 39-9 Amendment if inspection negotiations happen after you've already moved.

What most people get wrong

• Treating the mortgage payment as the carrying cost. It isn't. Post-homestead taxes, landlord insurance, and reserves are real. Model them before you commit.
• Assuming rent covers PITI equals cash flow positive. It doesn't. You haven't paid vacancy, management, maintenance, or capex yet.
• Missing the §121 window. Rent for 3+ years and you may owe federal capital gains on appreciation that would have been fully tax-free if sold before the deadline.
• Forgetting the homestead exemption reset. Your property tax line in year two as a landlord is not the number on your current escrow statement.
• Self-managing from out of state. Texas Property Code §92.052 and §92.056 impose a statutory repair duty with teeth — tenants can terminate, repair-and-deduct, or sue if you're slow to fix a condition that materially affects health or safety. "I was in Seattle" is not a defense. Hire a manager or sell.
• Using the wrong insurance. A standard HO-3 homeowner policy is not valid on a tenant-occupied property. You need a DP-3 landlord policy, and you need it in force before the tenant moves in.
• Not filing the right paperwork. If you keep the house, update your mailing address with BCAD so you actually receive the annual appraisal notice in April — you have until May 15 (or 30 days after the notice) to file a §41.41 protest, and missing it because the notice went to the rental is a self-inflicted wound.

If you rent: the 30-day setup

• Hire a licensed Texas property manager. Verify the license on TREC's site.
• Switch to a DP-3 landlord policy and raise liability to at least $500,000, ideally with an umbrella.
• Handle utilities: CPS Energy (electric/gas) and SAWS (water/sewer) need to be transferred to the tenant's name at move-in, not left on yours.
• Use TAA (Texas Apartment Association) or a Texas REALTORS residential lease — not a generic online template.
• Security deposit: Texas Property Code §92.103 gives you 30 days after the tenant surrenders the property to return it with an itemized deduction list. Put the deadline on your calendar the day they move out.
• If the tenant is a servicemember, understand the SCRA (50 U.S.C. §3955) termination rights on PCS or deployment orders — 30 days' notice after the next rent due date, and you cannot penalize them for it.

The call

Run the three numbers — §121 exposure, post-homestead tax bill, and honest cash flow with full reserves. If two of three argue for selling, sell. If two of three argue for renting and you have local management lined up, rent.

When you're ready to move either direction, RentInSA can help — list your home for rent or FSBO free at /list-your-home, compare active rental comps at /rentals, or find an agent who handles relocations at /agents.