The 1% rule is a quick screening test for rental properties: a property's expected gross monthly rent should be at least 1% of its total acquisition cost (purchase price plus any immediate rehab needed to get it rent-ready). A $200,000 rental should rent for roughly $2,000 a month or more to clear the bar. This is a rental-income rule of thumb, not a flip-pricing tool — it has nothing to do with what to offer on a flip, which is what the separate 70% rule addresses.
The Math
Monthly rent ÷ total acquisition cost ≥ 1%
Illustrative example only: a property costs $180,000 including $10,000 in needed repairs, so total acquisition cost is $190,000. To clear the 1% rule, it needs to rent for at least $1,900 a month. If comparable rentals in the area only command $1,500 a month, the property fails the 1% screen at that price — the deal would need a lower purchase price, a higher achievable rent, or it gets passed over.
What the 1% Rule Is Actually For
It's a first-pass filter to quickly eliminate rentals that clearly won't cash flow, before spending time on a full financial analysis. It doesn't account for taxes, insurance, maintenance, vacancy, property management, or debt service — a property can clear 1% and still lose money once real operating costs are subtracted, or fail 1% and still be a reasonable long-term hold if appreciation and low expenses make up the difference. That's precisely the gap the 50% rule is designed to estimate.
Where It Does and Doesn't Apply
- Works best as a fast comparison tool across multiple listings in the same market, to prioritize which properties deserve a deeper look.
- Skews unreliable in high-cost coastal metros, where rent-to-price ratios are structurally lower even for genuinely good long-term investments — few properties in expensive markets clear 1% even when they're solid holds bought for appreciation.
- Skews more achievable in lower-cost Midwest and Southern markets, where price-to-rent ratios run higher, but a property clearing 1% there isn't automatically a good deal either — it still needs the full underwriting.
- Doesn't apply to flips at all. If you're evaluating a purchase for a fix-and-flip rather than a rental hold, use the 70% rule instead, which is built around after-repair value and rehab cost, not rent.
What to Watch Out For
- Don't use asking rent as gospel. Pull actual comparable rents for similar properties in the immediate area, not a landlord's optimistic guess.
- Include rehab in the denominator. A property that needs $30,000 in work should be screened against purchase price plus that $30,000, not purchase price alone.
- Don't stop at the 1% screen. A property that passes still needs a full cash-flow analysis — mortgage payment, taxes, insurance, maintenance reserve, vacancy allowance, and management cost — before you can call it a good deal.
- It's a rule of thumb, not a law of physics. Some genuinely strong long-term rentals fall short of 1% and make up for it in appreciation, tax benefits, or low expense ratios.
Frequently Asked Questions
Is the 1% rule the same as the 50% rule?
No — they measure different things. The 1% rule screens whether rent is high enough relative to price to be worth a closer look. The 50% rule separately estimates that roughly half of gross rent will go to operating expenses (excluding the mortgage), to help estimate likely cash flow once you already have a rent figure. They're used together, not interchangeably.
Does the 1% rule apply to house flipping?
No. The 1% rule is a rental-property screening tool based on rent versus price. For flips, the relevant guideline is the 70% rule, based on after-repair value and repair costs.
What if a property doesn't meet the 1% rule?
It doesn't automatically mean it's a bad investment — it means it needs closer scrutiny of appreciation potential, expense ratios, and financing terms before you can judge it, especially in higher-cost markets where few properties clear 1%.