DealLens: Reverse MAO Calculator for Zillow

Reverse-solve your max offer (MAO) on any Zillow & Redfin listing. Cash-on-cash, cap rate & 70% rule — for wholesalers & investors.

Stop guessing your offer. DealLens turns any Zillow or Redfin listing page into a full rental deal analysis in one glance — and reverse-solves the exact price you should offer to hit your target return. ◆ INSTANT DEAL ANALYSIS Open a listing and DealLens auto-detects the list price, rent estimate, HOA and state, then shows you: • Monthly cash flow (red/green light at a glance) • Cash-on-cash return & gross yield • Cap rate & rent-to-price (1% rule) status • Full transparent expense breakdown: mortgage P&I, PMI, property tax, insurance, HOA and operating costs ◆ REVERSE MAO — THE KILLER FEATURE (PRO) Wholesalers' favorite number, finally automated. Drag the target cash-on-cash slider (4%–16%) and DealLens solves the math backwards: • Max Allowable Offer (MAO) to hit your target return • Exactly how much of a discount to negotiate State-level property tax and insurance defaults (all 50 states + DC) are pre-filled for you, and adjustable anytime. ◆ ACCURATE BY DESIGN • 51-jurisdiction tax & insurance dataset (sources & verification date built in) • PMI automatically applied when your down payment is under 20% • Rent figures from official page estimates — estimated values are clearly flagged, never silently guessed • O(1) closed-form solver: the MAO you see is mathematically exact, re-verified by 70+ automated tests ◆ PRIVACY FIRST No account, no tracking, no data collection. Everything runs locally in your browser. ◆ WHO IT'S FOR Wholesalers locking max offers • Buy-and-hold investors screening rentals • House hackers • Agents advising investor clients — Full analysis is free. Pro ($19.99 one-time, lifetime) unlocks the Reverse MAO solver. Payment handled securely by ExtensionPay/Stripe. DealLens is not affiliated with Zillow or Redfin. Analysis is a screening estimate — always verify numbers independently before making offers. FAQ Q: How do I calculate cash-on-cash return on a Zillow listing? A: DealLens auto-pulls the list price, rent estimate, HOA and state, applies state-level property tax and insurance defaults (all 50 states + DC, sources listed in-app), then shows monthly cash flow and cash-on-cash return directly on the listing page — no spreadsheet, no copy-pasting. Q: Is there a Chrome extension for Zillow rental property analysis? A: Yes — DealLens overlays a full deal analysis (cash flow, cash-on-cash, cap rate, 1% rule, expense breakdown) on any Zillow or Redfin listing, free. Pro adds the Reverse MAO solver. Q: How do you calculate MAO (Maximum Allowable Offer) for rental properties? A: Instead of checking cash flow at the asking price, DealLens solves the equation backwards: set your target cash-on-cash return (4%–16%) and it computes the exact max price you can pay — including price-scaled property tax, insurance and PMI. Mathematically exact, verified by 70+ automated tests.