The 1% Rule
A fast first screen for rental cash flow
The 1% rule is a quick screening test... but be aware that it is only a rough guideline (I don't use it). It says a rental property's monthly rent should be at least one percent of its total purchase price plus repairs. It is not a substitute for a full underwrite, but it quickly separates properties worth analyzing from ones that will struggle to cash flow after debt service.
Monthly Rent ÷ (Purchase Price + Repairs) ≥ 1%- Monthly Rent
- Verified market rent, not the seller's projection
- Purchase Price + Repairs
- All in acquisition cost before financing
Example: A rowhome bought for $180,000 with $20,000 in repairs needs about $2,000 a month in rent to pass the 1% screen.












