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Rules of thumb

The 1% rule and the 50% rule

By , Property Rental Calculator · Updated August 2026

Rules of thumb exist to save you time, not to make the decision for you. The 1% rule and the 50% rule are two of the most repeated in real estate. Both are useful as fast first filters. Both fall apart if you lean on them too hard. Here's how to use each one honestly.

The 1% rule

The 1% rule says a property's monthly rent should be at least 1% of its purchase price. A $250,000 property would need to rent for about $2,500 a month to pass. It's a five-second gut check on whether rent is high enough relative to price to have a shot at cash flow.

The catch: in many markets, especially higher-priced coastal metros, very few properties clear 1% anymore. That doesn't automatically make them bad investments, it just means the 1% rule filters out most of the market and leans toward cheaper, higher-yield areas. Treat a miss as "look closer," not "walk away."

The 50% rule

The 50% rule says that, over time, operating expenses will run about half of a property's gross rent, before the mortgage. So on $2,000 of monthly rent, you'd estimate roughly $1,000 in operating costs (taxes, insurance, maintenance, management, vacancy) and about $1,000 of NOI, then subtract the mortgage from there.

Its real value is as a reality check. New investors chronically underestimate expenses, and the 50% rule pushes back on the optimistic "rent minus mortgage" math that gets people into bad deals. Note what it excludes: it's operating expenses only, so the mortgage payment still comes out afterward, and it doesn't neatly separate capital expenditures.

Where both rules break down

Every property is different. The 50% rule assumes a uniform expense ratio that won't match an old building with deferred maintenance or a newer one under warranty. The 1% rule ignores expenses and financing entirely. Age, condition, location, and management style all move the real numbers around. These rules are screens for deciding what deserves a full analysis, nothing more.

How to actually use them

The Rental Property Calculator shows the 1% rule result automatically and lets you enter real, itemized expenses instead of relying on the 50% shortcut.

Want to test this on a real deal? The free Rental Property Calculator runs every number in this guide in your browser. These guides are educational estimates, not financial or tax advice.

Common questions

Is the 1% rule still realistic in today's market?

Not everywhere. In many markets, especially higher-priced coastal metros, very few properties clear 1% anymore. A miss doesn't automatically make a property a bad investment, it just means you should look closer instead of walking away.

What does the 50% rule leave out?

It only covers operating expenses like taxes, insurance, maintenance, management, and vacancy. The mortgage payment still comes out after that, and the rule doesn't cleanly separate out capital expenditures.

Should I use both rules on the same deal?

Yes. Use the 1% rule to quickly sort a long list of listings, then use the 50% rule to sanity-check your expense assumptions before you get attached to a deal.

Can a property fail the 1% rule and still be a good investment?

Yes. A property that passes both rules can still lose money, and one that fails the 1% rule can still work once you run the real, itemized numbers instead of the shortcut.

How this is built and kept current

Cedrick Reese, a web developer, wrote this guide by comparing how the 1% rule and 50% rule are actually described across real estate investor education sites, including Stessa's and Landlord Studio's write-ups on the 50% rule. Since both are informal industry rules of thumb rather than anything set by a regulator, there's no single authority to check against, so the ranges and caveats here get revisited whenever those sources update their own explanations or the thumb-rules commonly cited in the industry shift.

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