Buying a rental after you already own your own home is a common way to start investing. You know the market, you may have equity to work with, and you can learn on one property before you add more.
Here’s how to think about rental property investing.
The Two Returns: Cash Flow and Appreciation
Rental properties make money two ways:
Cash flow (the monthly check)
- Monthly rent received
- Minus: mortgage, real estate tax, insurance, maintenance, vacancy, property management
- Equals: monthly cash flow
- Improves over time if rents grow faster than expenses
Appreciation (long-term value growth)
- For example: buy at $345K, sell 10 years later at $415K
- That’s a $70K gain before selling costs and taxes
- Not guaranteed, but it can compound over time
Many investors want positive cash flow from day one, with appreciation as the long-term upside.
The 1% Rule: Quick Screen
A simple first filter: monthly rent should be at least 1% of the purchase price.
- Purchase price: $345,000
- 1% rule rent: $3,450/month
Example:
- A $345,000 property renting for $4,000/month passes (1.16%)
- A $345,000 property renting for $3,000/month doesn’t (0.87%)
The 1% rule is fast but imprecise. Taxes, insurance, HOA dues, and condition vary a lot between properties. Always run the full numbers.
Calculating Cash-on-Cash Return
This is the return on the actual cash you put in.
Formula: Cash-on-cash return = Annual cash flow / Cash invested
Illustration: $345K property, 20% down ($69K), renting for $4,000/month. These inputs are hypothetical, chosen to show the math. They’re not a rent estimate for any specific property. The loan assumes, for example, a 6.5% rate on a 30-year mortgage.
| Item | Amount |
|---|---|
| Monthly rent | $4,000 |
| Annual rent | $48,000 |
| Mortgage P&I (30 yr, 6.5%, $276K) | -$20,934 |
| Real estate tax (Rockingham County, $0.66 per $100) | -$2,277 |
| Insurance (hypothetical) | -$1,400 |
| Maintenance (1% of value) | -$3,450 |
| Vacancy (7% of rent) | -$3,360 |
| Property management (10% of rent) | -$4,800 |
| Annual cash flow | $11,779 |
| Cash-on-cash return | $11,779 / $69,000 = about 17% |
That’s a strong result, and it depends entirely on the inputs. Add an HOA, lower the rent to $3,500, or use a higher rate, and cash flow drops quickly. Plug in the actual rent, tax, and insurance for the property you’re considering. (Rockingham County’s 2026 rate is from the county’s tax rates page. In the City of Harrisonburg, the rate is $1.01 per $100, per the city’s real estate tax page.)
Debt Service Coverage Ratio (DSCR)
Lenders that offer DSCR loans (investor loans qualified on the property’s income rather than yours) use this ratio to see whether the property’s income covers the loan.
DSCR = Net operating income / Annual debt service
Net operating income is rent minus operating expenses (tax, insurance, maintenance, vacancy, management), before the mortgage.
- Above 1.0: the property’s income covers the debt payments
- Below 1.0: it doesn’t
- Many DSCR lenders look for 1.0 to 1.25 or higher, and requirements vary
On the illustration above:
- Net operating income: $48,000 minus $15,287 in operating expenses = $32,713
- Annual debt service: $20,934
- DSCR: $32,713 / $20,934 = about 1.56
Where to Start in Harrisonburg
A few local facts to work with:
- The median sales price in Harrisonburg and Rockingham County was $345K for the 12 months through August 2026, per my September 2026 market report
- Rental demand is steady near JMU and major employers
- Real estate tax rates differ between the city ($1.01 per $100) and the county ($0.66 per $100), which changes your numbers
Strategy:
- Focus on location and condition. Proximity to JMU, downtown, major employers, and main roads matters for rentability. A home in good condition means fewer surprise repairs.
- Target simpler properties first. Modest single-family homes and townhomes are often easier to manage and easier to sell later.
- Use the 1% rule as a screen, then run the full numbers.
- Keep reserves. Several months of expenses set aside for vacancies and repairs.
- Check zoning and rental rules for the specific property before you buy.
Cash Flow vs. Appreciation Strategy
If you have a long time horizon and don’t need the income now: You may accept thinner cash flow in exchange for appreciation potential. Just make sure you can cover any shortfall.
If you need the property to produce income now: Prioritize cash flow. Look for properties where the rent comfortably covers all expenses.
Either way: The best properties do both. Look for solid cash flow in locations with long-term demand.
Key Takeaways
- Cash flow: monthly profit after all expenses
- Appreciation: property value growth over time, not guaranteed
- 1% rule: monthly rent at least 1% of purchase price (a quick screen only)
- Cash-on-cash return: annual cash flow divided by cash invested
- DSCR lenders look at net operating income divided by debt payments
- Run the full numbers on every property
Ready to Analyze Your First Rental?
Found a property you think might work? Let’s run the numbers together. Call me at (540) 246-9067.
Frequently Asked Questions
What's the difference between cash flow and appreciation?
Cash flow is rent minus expenses (mortgage, taxes, insurance, maintenance, vacancy, management). Appreciation is the property's value increasing over time. Both contribute to your return; cash flow is more predictable, appreciation is not guaranteed.
What's cash-on-cash return?
Your annual cash flow divided by the cash you invested. Put in $50,000 and net $5,000 a year, and your cash-on-cash return is 10%. Many investors set a minimum target before they buy.
What's the 1% rule?
A quick screen: monthly rent should be at least 1% of the purchase price. A $345,000 property would need to rent for $3,450 a month to meet it. It's a rough filter, not an analysis.
How do I evaluate an investment property?
Start with annual rent, subtract all operating expenses and the mortgage payment to get annual cash flow, then divide by your cash invested for cash-on-cash return. If you're using a DSCR loan, also calculate net operating income divided by annual debt payments; many DSCR lenders look for 1.0 to 1.25 or higher.
What expenses should I budget for rentals?
Mortgage (if financed), real estate tax, insurance, maintenance and repairs, a vacancy allowance, property management if you outsource it, and any utilities or HOA dues you cover.
Should I aim for cash flow or appreciation?
It depends on your time horizon and how much monthly income you need. A longer horizon can tolerate thinner cash flow in exchange for appreciation potential. If you need the property to produce income now, prioritize cash flow.