Updated September 2026
The "1% rule" is one of the most repeated rules of thumb in rental real estate: monthly rent should be roughly 1% or more of the purchase price. It's a fast screening filter, not a substitute for actually running the numbers — here's where it comes from, when it's useful, and where it reliably breaks down.
For a $200,000 property, the 1% rule suggests looking for roughly $2,000/month in rent before digging further. A property renting for $1,400/month at that same $200,000 price (0.7%) would fail the screen; one renting for $2,200/month (1.1%) would pass. It's meant purely as a first filter to quickly discard properties that are unlikely to cash flow well, before spending time running full numbers through the calculator — it isn't meant to replace that full calculation.
Rent-to-price ratio correlates loosely with cash flow potential because a higher ratio means more income relative to what you're financing, which leaves more room to cover the mortgage payment and operating expenses before cash flow goes negative. It's a rough proxy for cap rate and cash-on-cash return that can be estimated instantly from a listing price and a rent estimate, without knowing financing terms or itemized expenses yet — useful for scanning dozens of listings quickly, much less useful once you're seriously evaluating one specific deal.
The 1% rule was popularized in and travels best in moderate-price, cash-flow-oriented markets. In expensive coastal and major-metro markets, rent-to-price ratios of 0.4–0.6% are common even for perfectly healthy, well-performing rental properties — a $700,000 property renting for $3,000/month (about 0.43%) would fail the 1% screen decisively, yet plenty of investors in those markets buy properties at that ratio deliberately, prioritizing long-run appreciation and a lower-risk, higher-income tenant pool over immediate high cash flow. Applying the 1% threshold uniformly across very different markets systematically screens out an entire category of investment strategy, not just bad deals.
Like cap rate, the 1% rule says nothing about your specific down payment, interest rate, or loan term — two buyers looking at the identical property and rent will get identical 1% rule results but very different actual cash-on-cash returns once financing enters the picture. A property that passes the 1% screen can still show negative cash flow under a small down payment and high interest rate once you run it through the calculator with real financing terms.
The ratio uses gross rent, not NOI — it doesn't account for property tax rates that vary enormously by jurisdiction, HOA fees, insurance costs that can be dramatically higher in some regions (coastal flood or wildfire zones, for example), or a property's specific maintenance profile. Two properties with identical 1% rule results can have very different actual cash flow once those real, itemized expenses are entered.
Treat the 1% rule the way it was designed to be used: a five-second first filter when scanning listings, to prioritize which properties are worth the ten minutes it takes to run real numbers through the calculator — not as a pass/fail decision criterion on its own, and not as a universal benchmark across every market. In a market where 1% is realistically unattainable for quality properties, a lower internally-consistent local benchmark (compared against similar listings nearby) is more useful than importing a national rule of thumb wholesale.
Is there a "2% rule" too? Yes — a stricter version sometimes cited for higher cash-flow-focused strategies, generally found (if at all) in lower-priced markets with correspondingly higher risk profiles. The same caveats about market-dependence apply even more strongly.
Should I ever buy below the 1% rule? Many investors do, deliberately, in stronger-appreciation, lower-risk markets — the rule is a screening heuristic, not a hard requirement, and plenty of successful long-term holds have rent-to-price ratios well under 1%.
Does the 1% rule account for financing costs? No — it's calculated from rent and price alone. Always follow it up with the full calculator using your actual financing terms and expenses before deciding.
This page is educational only, not investment advice. The 1% rule is a rough screening heuristic — verify all figures independently before making a purchase decision.