ZIP CODE 78665 // AUSTIN-ROUND ROCK-GEORGETOWN, TX // DATA AS OF 2026-09-30
Round Rock, TX (78665) Rental Property Cap Rate & Cash Flow Report
Located in Williamson County (Round Rock, TX), Zip Code 78665 ranks #359 of 500 nationally (28th percentile) with a Zillow ZHVI typical acquisition price of $390,267 (-6.1% YoY) and a ZORI observed market rent of $1,691/mo (+2.6% YoY). Requires at least 66.3% down payment at 6.5% interest to reach $0/mo break-even cash flow.
Net Monthly Cash Flow
-$1,142/mo
Annual: -$13,710/yr
Net Cap Rate
2.55%
NOI: $9,971/yr
Cash-on-Cash Return
-15.27%
Cash Needed: $89,761
1% Rule Ratio
0.43%
Gross Yield: 5.20%
Break-Even Rent
$3,005/mo
State Tax: 1.47%/yr
INTERACTIVE PRO-FORMA STATEMENT (ZIP 78665 BENCHMARK)
Edit any value
Purchase Price (ZHVI Median)
Monthly Gross Rent (ZORI Median)
Down Payment (%)
Interest Rate (30Y Fixed %)
Annual Property Tax (TX Avg 1.47%)
Annual Home Insurance ($)
Monthly HOA Fee ($)
Monthly Debt Service (P&I)
-$1,973/mo
Monthly Operating Expenses (Tax + Ins + 13% Reserves)
-$861/mo
HISTORICAL ZHVI PRICE VS. ZORI RENT TRAJECTORY (78665)
| Year | Median Price | Median Rent | Gross Yield |
|---|---|---|---|
| 2021 | $464,087 | $1,804/mo | 4.67% |
| 2022 | $525,183 | $1,860/mo | 4.25% |
| 2023 | $457,124 | $1,799/mo | 4.72% |
| 2024 | $437,153 | $1,719/mo | 4.72% |
| 2025 | $415,655 | $1,648/mo | 4.76% |
| 2026 | $390,267 | $1,691/mo | 5.20% |
COMPARABLE U.S. RENTAL MARKETS
| Zip / City | Price | Rent | Cap Rate | Cash Flow |
|---|---|---|---|---|
| 77379 Spring, TX | $360,401 | $1,560/mo | 2.55% | -$1,057/mo |
| 77406 Richmond, TX | $415,426 | $1,804/mo | 2.56% | -$1,213/mo |
| 75071 McKinney, TX | $474,508 | $2,061/mo | 2.56% | -$1,386/mo |
| 77095 Houston, TX | $320,742 | $1,394/mo | 2.57% | -$935/mo |
| 78660 Pflugerville, TX | $364,282 | $1,600/mo | 2.62% | -$1,048/mo |
| 78641 Leander, TX | $425,323 | $1,872/mo | 2.62% | -$1,220/mo |