The 1% rule for rental property investing is one of the simplest formulas investors use when evaluating a potential rental property.
The concept is straightforward: if a property costs $200,000, an investor looks for approximately $2,000 in monthly rent. At first glance, that gives you a quick way to determine whether a property may be worth investigating further.
But the 1% rule is only a starting point.
It does not account for mortgage costs, property taxes, insurance, maintenance, vacancy, property management, or larger capital expenses. And when borrowing costs are higher, those additional expenses can make a property that meets the 1% rule much tighter from a cash-flow perspective.
So, does the 1% rule still work for rental property investors?
Yes—but it should be treated as a screening tool rather than a complete investment analysis.
Watch: How the 1% Rule Can Change With Financing Costs
The 1% rule can provide a useful first look at a rental property's potential, but financing can change the equation.
In the video below, we explain why investors may want more room in a deal when borrowing costs are higher and why the rent-to-price ratio should always be considered alongside the property's actual expenses.
The basic takeaway is simple: don't force a property to fit the 1% rule. Look at whether the entire deal makes sense.
What Is the 1% Rule for Rental Property?
The 1% rule compares a property's monthly rent with its purchase price.
The basic calculation is:
Monthly Rent ÷ Purchase Price × 100 = Rent-to-Price Ratio
For example, if a rental property costs $200,000 and can reasonably generate $2,000 per month in rent:
$2,000 ÷ $200,000 = 1%
The property meets the 1% rule.
If that same property could generate $2,500 per month:
$2,500 ÷ $200,000 = 1.25%
That produces more gross rental income relative to the purchase price.
However, neither calculation tells you the property's actual cash flow.
Why Higher Interest Rates Can Make the 1% Rule Tighter
The rent-to-price ratio is only one part of the investment equation.
When financing costs increase, the mortgage payment can consume a larger portion of the property's rental income. That leaves less room for the other costs of owning and operating the property.
For example, consider a $100,000 rental property:
- 1% rule: $1,000 monthly rent
- 1.25%: $1,250 monthly rent
- 1.5%: $1,500 monthly rent
A higher rent-to-price ratio can provide more gross income relative to the purchase price. That additional room may become particularly important when financing costs are higher.
These percentages are not guarantees of profitability. They are simply useful benchmarks for screening potential investments.
The actual numbers still need to be analyzed.
The 1% Rule Does Not Equal Cash Flow
A property can meet the 1% rule and still have weak cash flow.
Why?
Because gross rent is not the same as profit.
Before deciding whether a rental property makes financial sense, investors should consider expenses such as:
Mortgage Costs
The loan amount, interest rate, down payment, and loan terms all affect the property's monthly financing expense.
Property Taxes
Property taxes can have a meaningful impact on the property's monthly and annual operating costs.
Insurance
Landlord insurance is another recurring expense that needs to be included in the analysis.
Maintenance and Repairs
Rental properties require ongoing maintenance, and unexpected repairs can affect cash flow.
Vacancy and Turnover
A property may not remain occupied continuously. Vacancy, tenant turnover, cleaning, repairs, and make-ready work can all reduce the property's annual income.
Property Management
If you hire a property management company, management fees become part of the property's operating expenses. For many owners, that cost needs to be weighed against the time, responsibilities, and operational work involved in managing the property themselves.
Capital Expenses
Major expenses such as roofs, HVAC systems, appliances, exterior work, and other significant replacements need to be considered as part of long-term ownership.
Once these costs are included, you get a much more realistic picture of the property's potential cash flow.
Don't Buy a Property Just Because It Hits 1%
The 1% rule can help you identify properties worth investigating, but it should not be the only reason you move forward with a purchase.
Before buying, ask:
- What will the actual monthly mortgage payment be?
- What are the property taxes?
- How much will insurance cost?
- What rent can the property realistically achieve?
- What maintenance should be budgeted?
- How much vacancy should be expected?
- Are there HOA or other recurring fees?
- Will the property need repairs before it can be rented?
- What will property management cost?
- What happens to the numbers if expenses are higher than expected?
These questions turn a quick screening formula into a more complete investment analysis.
Should Every Rental Property Meet the 1% Rule?
Not necessarily.
The 1% rule is a guideline, not a requirement for every successful rental investment.
A property below 1% could still make sense depending on its purchase price, financing, expenses, location, long-term strategy, and other investment factors.
Likewise, a property that meets or exceeds 1% is not automatically a good investment.
The better question is:
Does the property's expected income support its actual costs and the investment strategy?
That's where the full numbers become important.
The 1% Rule Is a Starting Point, Not the Whole Equation
The 1% rule remains useful because it gives investors a quick way to screen potential rental properties.
But don't stop there.
A property that looks attractive based on rent and purchase price can look very different after you account for financing, taxes, insurance, maintenance, vacancy, capital expenses, and management.
For St. Louis rental investors, the goal should be to understand the entire operating picture before committing to a property.
Use the 1% rule to find deals worth investigating. Then run the numbers to determine whether the deal actually works.
Managing the Property After You Buy
Finding a property that works financially is only one part of owning a rental.
Once you become a landlord, you also have to deal with leasing, tenant communication, rent collection, maintenance requests, repairs, turnovers, inspections, and the unexpected issues that come with rental ownership.
That's where professional property management can become part of the investment strategy.
Homestretch Property Management helps St. Louis-area rental owners handle the ongoing operational side of their properties, including leasing, tenant management, maintenance, make-readies, rent collection, and day-to-day property oversight.
Considering a rental property in the St. Louis area?