fmr.fyi – Fair Market Rent Research Helper

View FMR data and cash flow calculations directly on real estate listings. Choose between Cash Flow mode or FMR-only mode.

Instant Cash Flow Analysis and FMR Data on Real Estate Listings fmr.fyi is a Chrome extension that helps investors, property managers, and homebuyers evaluate rental properties while browsing real estate listings. Choose between two display modes: view monthly cash flow calculations or display Fair Market Rent (FMR) data directly on supported sites, eliminating the need for manual calculations or separate tools. The extension detects property details such as address, price, bedroom count, and HOA fees, then shows an on-page indicator based on your selected mode. In Cash Flow mode, you'll see estimated monthly cash flow calculations. In FMR mode, you'll see the Fair Market Rent value for the property. Selecting the indicator opens a detailed analysis view with HUD FMR and Small Area FMR data, local tax rates, mortgage assumptions, and customizable expense inputs. Key Features Two Display Modes: - Cash Flow Mode: Shows monthly cash flow estimates based on several customizable factors - FMR Mode: If you'd rather see the raw data and do the calculations yourself, this mode does just that. On-page indicators shown directly on listings Uses official HUD FMR and SAFMR data Automatically detects and includes HOA fees when available (Cash Flow mode) Configurable assumptions for financing, taxes, and expenses (Cash Flow mode) Supports Zillow, Redfin, Realtor.com, and Homes.com Works on list views, map views, expanded map cards, and property detail pages Enable or disable the extension per site Privacy All calculations run locally in your browser. No personal data or browsing activity is collected or stored.