Rental numbers for ZIP 37921 (Knoxville, TN)
Negative cash flow at today's 7.78% investor rate with 25% down; the typical home breaks even at about 3.3%.
- Gross yield
- 7.1%
- rent x 12 / price
- Est. cap rate
- 3.9%
- NOI / price
- Cash flow
- -$615/mo
- at 7.78%, 25% down
- Typical price
- $291,000
- Zillow ZHVI, Aug 2026
- Typical rent
- $1,721/mo
- Zillow ZORI, Aug 2026
The pro forma
Typical home, default assumptions
| Operator | Line | Amount | Source |
|---|---|---|---|
| Gross rent | $20,652 | ||
| Vacancy | $1,033 | ||
| Management | $1,570 | ||
| Property tax | $1,753 | ||
| Insurance | $1,979 | ||
| Maintenance | $2,906 | ||
| Net operating income | $11,412 | ||
| Loan payments | $18,794 | ||
| Cash flow | -$7,382 |
| Operator | Line | Amount | Source |
|---|---|---|---|
| Typical price | $290,643 | ||
| Down payment (25%) | $72,661 | ||
| Loan | $217,982 | ||
| Rate | 7.78% | ||
| Monthly payment | $1,566 | ||
| Cash in | $81,380 | ||
| Cash-on-cash return | -9.1% | ||
| DSCR | 0.61 | ||
| Break-even rate | 3.27% |
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$1,979 a year
- NAIC 2023 average homeowners (HO-3) premium for Tennessee, $1,649, 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
- +1.2%
- Rent, 12 months
- +1.1%
- Rent minus price growth
- -0.1 pts
- positive means yields are improving
Show the numbers
| Month | Typical value | Rent |
|---|---|---|
| Aug 2021 | $190,816 | n/a |
| Aug 2022 | $238,045 | n/a |
| Aug 2023 | $263,208 | $1,644 |
| Aug 2024 | $283,975 | $1,718 |
| Aug 2025 | $287,257 | $1,703 |
| Aug 2026 | $290,643 | $1,721 |
Rent references
Two sources, never blended
| Source | Studio | 1 bed | 2 bed | 3 bed | 4 bed |
|---|---|---|---|---|---|
| HUD Small Area FMR, FY2026 | $1,220 | $1,230 | $1,530 | $1,940 | $2,260 |
| Zillow observed rent, Aug 2026 | $1,721 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: Knoxville, TN HUD Metro FMR Area.
Property tax
- Effective rate
- 0.60%
- ZIP area, ACS
- At the typical price
- $1,753/yr
Median real estate taxes paid divided by median home value, Census ACS 2020 to 2024. Knox County: 0.43%. Actual bills depend on the assessment, exemptions and any non-homestead rate.
Supply
- Permits per 1,000 households
- 25.8
- Knox County, last 12 months
- National percentile
- 95th
- among US counties
5,179 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 |
|---|---|---|---|---|---|
| 37912Knoxville | 2.3 mi | $291,000 | $1,261 | 5.2% | -$1,030 |
| 37909Knoxville | 2.4 mi | $379,000 | $1,482 | 4.7% | -$1,428 |
| 37916Knoxville | 4.3 mi | $491,000 | $1,517 | 3.7% | -$2,118 |
| 37919Knoxville | 4.4 mi | $550,000 | $1,588 | 3.5% | -$2,429 |
| 37902Knoxville | 4.8 mi | $635,000 | $2,106 | 4.0% | -$2,644 |
| 37917Knoxville | 5.3 mi | $254,000 | $1,714 | 8.1% | -$368 |
| 37915Knoxville | 5.7 mi | $200,000 | $1,976 | 11.9% | +$213 |
| 37923Knoxville | 5.7 mi | $404,000 | $1,631 | 4.9% | -$1,379 |
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 37921Questions
- Is 37921 good for rental property?
- On the typical home here, priced at $291,000 and renting for $1,721 a month (Zillow ZORI, Aug 2026), the gross yield is 7.1% and the estimated cap rate is 3.9%. At a 7.78% investor rate with 25% down, estimated cash flow is -$615 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 37921?
- Zillow's observed rent index for 37921 was $1,721 a month in August 2026, across all home types. HUD's FY2026 Small Area Fair Market Rent for a 2-bedroom here is $1,530, the 40th percentile of gross rents and the basis for Section 8 payment standards.
- What is the property tax rate in 37921?
- The effective property tax rate is about 0.60% of value (median taxes paid divided by median home value, Census ACS 2020 to 2024). On the typical $291,000 home that is about $1,753 a year. Your bill depends on the assessment and local exemptions.
- What interest rate makes a rental in 37921 break even?
- About 3.27%. Below that rate, the typical home here cash-flows with 25% down and the default costs; above it, it does not. Today's investor rate used here is 7.78%.
- How fast are prices and rents changing in 37921?
- Over the 12 months to August 2026, the typical home value changed +1.2% and the typical rent changed +1.1%. Prices rising faster than rents pushes yields down.
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.