Two listings, same street, similar price. One rents for $2,400 a month and needs a new roof. The other rents for $1,700 and sits in a district with a new transit line approved. Which is the better investment? The answer depends on numbers the listing does not show, and on how long you can wait.
Key facts at a glance
- Gross yield is annual rent divided by purchase price, before costs.
- Net yield typically lands 1.5 to 2.5 points below gross yield.
- A 1% rule is a screening tool, not an investment strategy.
- Appreciation is unrealised until you sell or refinance.
- Total return combines net cash flow, principal repayment and price growth.
Yield and appreciation are not rivals. They are two engines on the same vehicle, and most portfolios need both. This guide builds the comparison properly, using the costs that actually appear on a statement rather than the gross figures agents like to quote.
Calculate yield honestly
Gross yield is simple: annual rent divided by purchase price. A $400,000 property renting at $2,000 a month yields 6%. It is a useful first filter and almost useless on its own, because it ignores vacancy, management, taxes, insurance, maintenance and the mortgage.
Net yield subtracts operating expenses but not debt service. Take the same property: $24,000 gross rent, less 5% vacancy ($1,200), management at 8% ($1,920), taxes ($3,600), insurance ($1,400), maintenance reserve at 8% ($1,920) and a sinking fund for capital items ($1,200). Net operating income is about $12,760, a net yield of 3.2%. The gap between 6% and 3.2% is where most beginner models break.
Use realistic vacancy, not zero. A unit that rents in two weeks each year loses 4% before you start. If the local market has a seasonal lull, model it.
Appreciation needs a reason
Price growth is a forecast, and forecasts range from cautious to fantasy. Rather than picking a percentage, list the reasons a buyer would pay more in ten years: employment growth, transit, school demand, constrained supply, or a neighbourhood improving from a low base. If you cannot name two concrete reasons, assume growth at or below the rate of inflation.
Compare that with the yield alternative. A 3% appreciation assumption on a $400,000 house adds $12,000 in paper value in year one. The higher-yield unit might produce $9,000 in cash and principal repayment in the same year. One is spendable; the other is a valuation that can reverse.
Look at the supply pipeline too. A city with 5,000 apartments approved next to your single unit is a different bet from a street where no new construction is possible. Scarcity supports both rent and price.
The leverage effect, in both directions
Most property investors use a mortgage. With 20% down, a 3% price gain on the full value is a 15% return on your equity, before costs. That is the appeal. The same maths works in reverse: a 10% price fall wipes out half your equity, and the mortgage payment stays the same.
Stress-test at a higher rate before you buy. If the rent cannot cover the mortgage at 2 percentage points above today's rate, the deal depends on refinancing luck. Keep a reserve of three to six months of mortgage payments per property, separate from the maintenance fund.
Yield pays the bills. Appreciation builds the balance sheet. A property that only does one of those is a strategy, not a mistake, as long as you know which one you bought.
A worked comparison
Property A: $380,000, rent $2,300, taxes $3,200, insurance $1,300, management 8%, maintenance 8%. Net operating income around $13,600, net yield 3.6%, price growth assumed 2.5%.
Property B: $310,000, rent $2,050, taxes $2,100, insurance $1,100, management 8%, maintenance 10% because the building is older. Net operating income around $14,900, net yield 4.8%, price growth assumed 1.5%.
Five years out, Property A produces roughly $47,500 in price growth plus cash flow; Property B produces about $23,900 in growth plus more cash each month. The higher-yield option wins on cash in hand; the growth option wins on total return if the assumption holds. Which you need depends on whether you are funding retirement income or building equity.
Taxes and the invisible return
Depreciation, mortgage interest and operating costs are treated differently in every jurisdiction, and they can change the ranking of two deals. A property that produces modest cash flow but a large paper loss can be more tax-efficient than a high-yield unit with no deductions. Talk to an accountant who works with rental owners before you buy, not after the first tax return.
Also price your own time. Self-managing a single unit takes four to eight hours a month, more during turnover. If you value that at $40 an hour, the effective yield drops by roughly a percentage point. Professional management costs 8% to 12% but buys back the time and often improves tenant retention.
The questions that decide it
- Can the rent cover all costs at 90% occupancy and a higher rate?
- What are the two concrete reasons this area grows?
- How old are the roof, heating and electrical systems?
- What is the exit plan if prices stall for five years?
- Does the local rent regulation allow the increases in my model?
Write the answers down before you view a second time. A deal that survives the list is worth pursuing; one that needs optimistic assumptions in three places is not a deal, it is a hope. Run the same numbers on three comparable listings and the local market will tell you which assumption is doing the heavy lifting.
For the official reference behind this guide, see hud.gov. If you are planning the next step, read our guides to Buying a House With Foundation Problems: What to Check and Kitchen Addition Costs in 2026: What $50,000 Buys, or browse every Property & Real Estate guide.
