Whether a rental property is a good investment is not answered by whether the rent covers the mortgage. That is the test most first-time buyers around metro Detroit apply, and it misses maintenance reserves, vacancy, property management, and the time cost of actually running the thing. A more useful test looks at cash-on-cash return and compares it honestly against what the same capital could do elsewhere.
The Rent-Covers-the-Mortgage Test Is Incomplete
A property where rent exceeds the mortgage payment by a few hundred dollars a month looks profitable until a roof repair, a vacancy month, or a furnace replacement shows up, none of which are optional expenses over a normal holding period. Building a maintenance reserve of roughly 1 percent of the property's value per year, plus a realistic vacancy allowance, turns a rough rule of thumb into an actual return calculation.
Cash-on-Cash Return Is the Number That Matters
Cash-on-cash return divides the property's annual pre-tax cash flow, after all expenses and the mortgage payment, by the actual cash invested, typically the down payment plus closing costs. A rental in Taylor or Wyandotte producing $3,600 a year in net cash flow on a $40,000 cash investment is returning 9 percent, which is a real number an investor can compare against other options, unlike the vague sense that the rent covers the mortgage.
Appreciation Is a Bet, Not a Return
Cash flow is a return an investor can measure today; appreciation is a bet on future market conditions that may or may not pay off on the timeline hoped for. Some investors buy for cash flow and treat appreciation as a bonus, while others buy in appreciating submarkets with weak cash flow and bet on the market doing the work. Being honest about which strategy is actually being pursued avoids the common mistake of buying a cash-flow-negative property while calling it an investment.
The Time Cost Rarely Gets Priced In
Screening tenants, coordinating repairs, and handling the occasional late-night maintenance call all cost time that a spreadsheet return calculation does not capture. An investor who values their own time at even a modest hourly rate and tracks the hours a rental actually consumes over a year often finds the true return meaningfully lower than the number on paper, which is part of why some owners eventually move toward passive structures instead.
When Selling and Redeploying Makes More Sense
An owner who has run the honest cash-on-cash math and time cost and concluded the rental is underperforming has an option that avoids a straight taxable sale: a 1031 exchange can move the equity into a different property, or into a passive DST interest, deferring the capital gain rather than paying it out immediately. This works best as a decision made before listing, with a qualified intermediary lined up in advance, rather than something figured out after an offer is already accepted.
Comparing a Second Rental to a Passive Alternative
An owner satisfied with the cash-on-cash math but tired of the tenant calls does not have to choose between selling outright and buying another rental to manage themselves. Exchanging into a DST interest preserves the deferred gain while removing the operational role entirely, at the cost of the control and liquidity that comes with owning a rental directly. Weighing that tradeoff honestly, rather than defaulting to another self-managed purchase out of habit, is worth doing before signing a purchase agreement on property number two in Taylor, Wyandotte, or anywhere else in the metro area.
Common 1031 Exchange Questions
Is a rental a good investment if the rent covers the mortgage?
Not necessarily. That test ignores maintenance reserves, vacancy, and property management costs, all of which reduce the actual return below what a simple rent-versus-mortgage comparison suggests.
What is a good cash-on-cash return for a rental property?
It varies by market and risk tolerance, but many investors target 8 to 12 percent as a reasonable range, calculated as annual pre-tax cash flow divided by the actual cash invested.
Should I count on appreciation when evaluating a rental?
Appreciation is a bet on future market conditions, not a measurable return today. It is more reliable to evaluate a property on its current cash flow and treat any appreciation as a bonus rather than a plan.
How much should I budget for maintenance on a rental?
A common rule of thumb is roughly 1 percent of the property's value per year, though older properties or ones with deferred maintenance may need a higher reserve.
Can I sell an underperforming rental and defer the tax?
Yes, a 1031 exchange can move the proceeds from an underperforming rental into a different property or a passive DST interest, deferring the capital gain rather than paying it at sale, as long as it is set up before the original property closes.
