Every rental property listing looks promising — until you run the numbers. The 1% Rule is the fastest filter in real estate investing: if a property's monthly rent is at least 1% of its purchase price, it passes the first screen. A $200,000 property needs to rent for $2,000/month. Simple. Brutal. Effective.
Over 7 days, you'll go from knowing nothing about this rule to building a complete deal-filtering system. Each day takes 15 minutes. You'll learn the math, practice on real listings, understand the exceptions, and finish with a personal filter you can use on every property you ever evaluate. No spreadsheet expertise required — just a calculator and 15 minutes daily.
By Day 7, you'll reject bad deals in 10 seconds instead of spending hours analyzing properties that never had a chance. That's hours of your life returned, every month, forever.
The 1% Rule states: monthly rent must be ≥ 1% of total purchase price. A $180,000 property needs to rent for $1,800/month minimum. This isn't about whether you'd buy it — it's whether the deal deserves five more minutes of your time. Today, pull up three properties on Zillow and calculate the 1% threshold for each. Write down the purchase price × 0.01. That's your minimum rent target. If actual rent is below that number, the property fails the first screen. No emotion, no exceptions, just math.
Go to Zillow, set your target market, and search for properties under $300,000. For each listing, calculate the 1% threshold and check local rent estimates (Zillow's Rent Zestimate, Rentometer, or Craigslist comparables). Flag any property where estimated rent meets or exceeds 1% of the asking price. Most markets will yield 1-2 passes out of 5. In Midwest and Southeast markets, you'll find more. In coastal California or Boston, you may find zero — and that's valuable information about where (not) to invest.
The 1% Rule is your first screen. The 50% Rule is your second. On average, non-mortgage expenses (taxes, insurance, maintenance, vacancy, property management, capital reserves) consume about 50% of gross rent. If a property rents for $1,500/month, expect $750 in expenses before the mortgage payment. Today, take your Day 2 properties that passed the 1% Rule and estimate their net operating income (NOI) using: NOI = Monthly Rent × 0.50. A property renting for $2,000 has roughly $1,000/month NOI. That $1,000 needs to cover your mortgage AND produce profit.
Pick the best property from your Day 2 list. Run the complete calculation: Purchase price, down payment (assume 25% for investment property), loan amount, mortgage payment (use 7% rate, 30-year term — roughly $6.65 per $1,000 borrowed monthly). Then: Gross rent − 50% expenses = NOI. NOI − mortgage payment = monthly cash flow. Example: $200K property, $50K down, $150K loan = $997/month mortgage. $2,000 rent − $1,000 expenses = $1,000 NOI. $1,000 − $997 = $3/month cash flow. That property passed the 1% Rule but barely cash-flows. This is why the rule is a filter, not a final answer.
The 1% Rule is a screening tool, not gospel. It breaks down in three situations: (1) High-appreciation markets like San Francisco — a property at 0.7% might still win if appreciation averages 8% annually. (2) Value-add opportunities — a $150K property renting for $1,200 fails the 1% Rule, but a $30K renovation could push rent to $1,800, suddenly hitting 1.2% on $180K total investment. (3) Luxury properties — a $600K property renting for $5,000 (0.83%) may have lower maintenance ratios and better tenant quality. Today, find one property that fails the 1% Rule but might still be a good deal. Write down why.
Time for speed rounds. Find three new listings in your target market. For each, run the full analysis in under 5 minutes: (1) Calculate the 1% threshold. (2) Check rent estimates. (3) If it passes, estimate NOI using the 50% Rule. (4) Subtract estimated mortgage payment. (5) Calculate cash-on-cash return: Annual cash flow ÷ Total cash invested (down payment + closing costs + any repairs). A property returning under 8% cash-on-cash is mediocre. Under 5% is a pass. Over 12% is worth a deep dive. Time yourself. The goal is speed and pattern recognition.
Today you assemble everything into a repeatable system. Write down your personal filter thresholds: (1) Minimum 1% ratio: ___% (most investors use 1%, some use 0.8% in high-appreciation markets). (2) Minimum cash-on-cash return: ___% (8% is common, 12%+ preferred). (3) Maximum property age: ___ years (older = more maintenance). (4) Target markets: list 2-3 cities/areas. (5) Maximum price point: $_____. Now you have a one-page filter. Any property that doesn't meet these criteria gets rejected in 10 seconds. No emotional attachment, no "what if." Print this. Put it next to your computer. Every listing gets measured against it.
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