Rental numbers for ZIP 78570 (Mercedes, TX)
Negative cash flow at any interest rate with 25% down: the rent does not cover operating costs and principal.
- Gross yield
- 5.2%
- rent x 12 / price
- Est. cap rate
- -0.6%
- NOI / price
- Cash flow
- -$832/mo
- at 7.78%, 25% down
- Typical price
- $141,000
- Zillow ZHVI, Aug 2026
- Typical rent
- $610/mo
- Zillow ZORI, Aug 2026
The pro forma
Typical home, default assumptions
| Operator | Line | Amount | Source |
|---|---|---|---|
| Gross rent | $7,320 | ||
| Vacancy | $366 | ||
| Management | $556 | ||
| Property tax | $2,442 | ||
| Insurance | $3,437 | ||
| Maintenance | $1,407 | ||
| Net operating income | -$889 | ||
| Loan payments | $9,097 | ||
| Cash flow | -$9,986 |
| Operator | Line | Amount | Source |
|---|---|---|---|
| Typical price | $140,689 | ||
| Down payment (25%) | $35,172 | ||
| Loan | $105,517 | ||
| Rate | 7.78% | ||
| Monthly payment | $758 | ||
| Cash in | $39,393 | ||
| Cash-on-cash return | -25.3% | ||
| DSCR | -0.10 | ||
| Break-even rate | none |
Assumptions
Change them in the calculator- Down payment25%
- A common minimum for investment-property and DSCR loans.
- Interest rate7.78%
- Freddie Mac 30-year 7.03% (week of 2026-09-24) + 0.75 point investor premium.
- Loan term30 years
- Fixed, fully amortising.
- Closing costs3% of price
- Added to cash invested.
- Insurance$3,437 a year
- NAIC 2023 average homeowners (HO-3) premium for Texas, $2,864, x 1.2 for a landlord policy.
- Maintenance1% of price a year
- The 1% rule of thumb; older homes run higher.
- Vacancy5% of rent
- About 18 days empty a year.
- Management8% of collected rent
- A typical full-service fee; zero if you self-manage.
Trends
Five years to August 2026
- Price, 12 months
- +1.0%
- Rent, 12 months
- n/a
- rent series under a year old
- Rent minus price growth
- n/a
- positive means yields are improving
Show the numbers
| Month | Typical value | Rent |
|---|---|---|
| Aug 2021 | $103,459 | n/a |
| Aug 2022 | $124,159 | n/a |
| Aug 2023 | $133,247 | n/a |
| Aug 2024 | $143,839 | n/a |
| Aug 2025 | $139,265 | n/a |
| Aug 2026 | $140,689 | $610 |
Rent references
Two sources, never blended
| Source | Studio | 1 bed | 2 bed | 3 bed | 4 bed |
|---|---|---|---|---|---|
| HUD Small Area FMR, FY2026 | $770 | $780 | $970 | $1,260 | $1,400 |
| Zillow observed rent, Aug 2026 | $610 typical, all home types | ||||
HUD's Fair Market Rent is the 40th percentile gross rent (rent plus utilities) for a standard unit, and it is what Section 8 vouchers pay against. Zillow's index tracks asking rents on listed homes. The two measure different things, so they are shown side by side and never averaged. HUD area: Brownsville-Harlingen, TX MSA.
Property tax
- Effective rate
- 1.74%
- ZIP area, ACS
- At the typical price
- $2,442/yr
Median real estate taxes paid divided by median home value, Census ACS 2020 to 2024. Hidalgo County: 1.62%. Actual bills depend on the assessment, exemptions and any non-homestead rate.
Supply
- Permits per 1,000 households
- 23.8
- Hidalgo County, last 12 months
- National percentile
- 93th
- among US counties
6,435 new housing units permitted in 2025-09 to 2026-08, Census Building Permits Survey. A high figure means more new supply competing for tenants.
Nearby ZIP codes
| ZIP | Distance | Typical price | Rent | Gross yield | Cash flow /mo |
|---|---|---|---|---|---|
| 78559La Feria | 5.6 mi | $186,000 | $1,150* | 7.4% | -$610 |
| 78599Weslaco | 5.8 mi | $190,000 | $1,110 | 7.0% | -$756 |
| 78579Progreso | 5.9 mi | $133,000 | $1,040* | 9.4% | -$382 |
| 78596Weslaco | 7.3 mi | $169,000 | $1,122 | 8.0% | -$563 |
| 78562La Villa | 8.1 mi | $113,000 | $980* | 10.4% | -$288 |
| 78537Donna | 9.1 mi | $153,000 | $976 | 7.6% | -$594 |
| 78593Santa Rosa | 9.2 mi | $158,000 | $990* | 7.5% | -$587 |
| 78552Harlingen | 10.1 mi | $226,000 | $1,309 | 6.9% | -$818 |
* HUD Fair Market Rent, 2 bedroom (no Zillow rent index for that ZIP).
Run the numbers on a real listing
The calculator opens with this ZIP's figures. Swap in a listing's price and rent, your rate and your costs.
Open the calculator for 78570Questions
- Is 78570 good for rental property?
- On the typical home here, priced at $141,000 and renting for $610 a month (Zillow ZORI, Aug 2026), the gross yield is 5.2% and the estimated cap rate is -0.6%. At a 7.78% investor rate with 25% down, estimated cash flow is -$832 a month. The median gross yield across the 8,418 ZIP codes with full Zillow data is 5.6%. These are figures for a typical property, not a judgement on any particular one.
- What is the typical rent in 78570?
- Zillow's observed rent index for 78570 was $610 a month in August 2026, across all home types. HUD's FY2026 Small Area Fair Market Rent for a 2-bedroom here is $970, the 40th percentile of gross rents and the basis for Section 8 payment standards.
- What is the property tax rate in 78570?
- The effective property tax rate is about 1.74% of value (median taxes paid divided by median home value, Census ACS 2020 to 2024). On the typical $141,000 home that is about $2,442 a year. Your bill depends on the assessment and local exemptions.
- What interest rate makes a rental in 78570 break even?
- With the default assumptions, no interest rate brings cash flow to zero: rent does not cover operating costs plus principal on a 30-year loan with 25% down.
- How fast are prices and rents changing in 78570?
- Over the 12 months to August 2026, the typical home value changed +1.0%.
Sources and method
- Zillow Home Value Index (ZHVI), mid tier, smoothed and seasonally adjusted
Zillow Research. Read: 2026-08.
Typical home value by ZIP, county, metro and state, and the price trend.
- Zillow Observed Rent Index (ZORI), all homes plus multifamily, smoothed
Zillow Research. Read: 2026-08.
Typical market rent by ZIP, county and metro, and the rent trend (tier A pages).
- HUD Small Area Fair Market Rents, FY2026
US Department of Housing and Urban Development. Read: FY2026.
Rent by bedroom count for every ZIP. The rent used on tier B pages, and a reference on all pages. It is the 40th percentile gross rent, so it runs below market.
- American Community Survey 5-year estimates, 2020 to 2024 (B25103 median real estate taxes paid, B25077 median home value, B11001 households)
US Census Bureau. Read: 2020 to 2024.
Effective property tax rate (median taxes paid divided by median value) by ZIP code tabulation area, county and state; households for the permits ratio.
- Freddie Mac Primary Mortgage Market Survey, 30-year fixed (FRED series MORTGAGE30US)
Freddie Mac via the Federal Reserve Bank of St. Louis. Read: 2026-09-24.
The weekly 30-year rate. The site adds a disclosed investor premium to it for the loan payment.
- Building Permits Survey, county monthly files
US Census Bureau. Read: 2025-09 to 2026-08.
New housing units permitted in the last 12 months per 1,000 households, a supply-pressure signal.
- NAIC Homeowners Insurance Report, data for 2023
National Association of Insurance Commissioners. Read: 2023.
Average HO-3 homeowners premium by state, multiplied by 1.2 as a landlord-policy assumption.
Data: Zillow Research (ZHVI, ZORI), HUD, US Census Bureau, Freddie Mac. Every formula is on the methodology page.
Estimates from public data for a typical property. Not investment, tax or legal advice. Your property, financing and costs will differ.