- 01The 1% Rule is rate-blind: a $200K property at $2,000/month rent passes the rule at every interest rate, but cash flow swings from $684 to $351 as rates climb from 4% to 7.5%
- 02EP 120's Cleveland duplex at 0.88% fails the 1% Rule but cash-flows $267/month with a 1.27 DSCR — the rule rejects winning deals
- 03The Three-Number Screen — Cap Rate, DSCR, Cash-on-Cash Return — replaces the 1% Rule with rate-aware metrics that take 90 seconds
- 04Cap rate catches overpriced properties, DSCR catches rate risk, and cash-on-cash catches over-leveraged deals where too much cash is tied up for too little return
- 05A suburban SFR at 0.70% ratio fails the 1% Rule AND the Three-Number Screen at 0.81 DSCR — proving DSCR catches bad deals on its own without the 1% Rule
Show Notes
The 1% Rule Is Dead: A Deal That Proves It
Last episode, we ran a Cleveland duplex through the calculator. $210,000. Both units rented. Combined gross rent: $1,850 a month. That deal cash-flows $267 a month with a 1.27 DSCR.
Good deal. No question.
But before running the full numbers, I did what most investors do first — the shortcut. Rent divided by price. $1,850 divided by $210,000. That's 0.88%.
The 1% Rule says skip it. The most popular deal-screening shortcut in real estate told me to walk away from a deal that works.
The Rate-Blind Screen: Why the 1% Rule Broke
Here's a $200,000 property at $2,000 a month in rent. 1.0% ratio. Passes the rule.
Now change one variable — the interest rate:
- At 4.0% (2020): Cash flow +$684/month, DSCR 1.95, Cash-on-Cash 16.4%
- At 5.0% (2024): Cash flow +$595/month, DSCR 1.74, Cash-on-Cash 14.3%
- At 6.38% (2026): Cash flow +$464/month, DSCR 1.50, Cash-on-Cash 11.1%
- At 7.5% (DSCR loan): Cash flow +$351/month, DSCR 1.33, Cash-on-Cash 8.4%
That's a $333 swing in monthly cash flow. Same property. Same rent. Same ratio. The 1% Rule sees zero difference between those four scenarios.
I'm calling this "The Rate-Blind Screen" — a screening tool that can't see interest rates, which is the single most important variable in real estate investing in 2026.
When rates sat at 3-4%, the rule and reality happened to agree. A 1% ratio roughly meant the deal would cash-flow after expenses. But rates doubled. The ratio didn't move. Reality did.
Back in Episode 99, I introduced "The Four Horsemen" — vacancy, repairs, CapEx, management. The 1% Rule doesn't see any of them either. But at least those costs are roughly proportional to rent. Interest rates aren't proportional to anything in that ratio. They're invisible.
Two Deals, One Rule, Wrong Answer
Deal one: Cleveland duplex (from EP 120). $210,000 purchase, $1,850/month rent. Ratio: 0.88%. The 1% Rule says no.
But the actual numbers: Cap rate 7.1%. DSCR 1.27. Cash flow +$267/month. The building pays its debt with room to spare. If you'd filtered by the 1% Rule — opened Zillow, done the quick division, and moved on — you'd have skipped the best deal in that metro.
Deal two: Suburban single-family rental. $300,000 purchase, $2,100/month rent. Ratio: 0.70%. The 1% Rule says no, and this time it's right.
Cash flow: -$264/month. DSCR: 0.81. The building can't pay its loan. You'd be writing a check every month.
The 1% Rule got the right answer on deal two. But DSCR got the right answer on both. A 0.81 DSCR is below 1.0 — any lender would flag it. The 1% Rule is one-for-two. It caught the bad deal and killed the good one. That's not screening. That's a coin flip with extra steps.
The Three-Number Screen: What Actually Works in 2026
Three numbers. Ninety seconds. I call it "The Three-Number Screen."
Number one: Cap Rate. NOI divided by purchase price. This tells you whether the building earns enough relative to what you're paying — before adding leverage. Rate-independent, which makes it your first pass. Minimum 5-6% for cash flow markets. Cleveland: 7.1%. Clears.
Number two: DSCR. Net operating income divided by your debt payment. Above 1.0 means the building pays its loan. Above 1.25 means you've got a cushion. Below 1.0 and you're feeding it. This is the metric the 1% Rule was trying to be — except DSCR actually sees the rate, the leverage, and the expenses. Cleveland: 1.27. The suburban SFR: 0.81.
Number three: Cash-on-Cash Return. Annual cash flow divided by total cash invested. Down payment plus closing costs. This answers the question every investor actually cares about: what is my money earning? Target 8%+ for buy-and-hold.
Cap rate catches overpriced properties. DSCR catches rate risk. Cash-on-cash catches over-leveraged deals where too much cash is tied up for too little return. Each one covers a blind spot the others miss.
Your Challenge
Pull up the last deal you passed on — the one that didn't hit 1%. Run the three numbers: cap rate, DSCR, cash-on-cash. If the DSCR clears 1.25 and the cash-on-cash clears 8%, you may have thrown away a good deal. If it checks out, call the listing agent tomorrow morning.
Stop screening with a broken ruler.
Named Concepts Introduced
- "The Rate-Blind Screen" — What the 1% Rule actually is: a metric that can't see interest rates in a rate-dominated market
- "The Three-Number Screen" — Cap Rate, DSCR, Cash-on-Cash Return: the 90-second funnel that replaces the 1% Rule
Resources Mentioned
- REI Prime Cash Flow Calculator — runs all three metrics in the Three-Number Screen
- The Two-Speed Market (EP 120) — Cleveland duplex deal that fails the 1% Rule but cash-flows
- The Cash Flow Myth (EP 99) — The Four Horsemen of expenses the 1% Rule can't see
- Cap Rate — NOI divided by purchase price, rate-independent first filter
- DSCR — debt service coverage ratio, the rate-aware metric lenders actually use
- Cash-on-Cash Return — what your invested dollar actually earns
- The 1% Rule — the shortcut that stopped working when rates doubled
Cap rate measures a property's annual net operating income as a percentage of its purchase price or current market value, assuming an all-cash purchase.
Read definition →Cash flow is what's left in your pocket after a rental pays all its expenses — including the mortgage. NOI minus debt service. What actually hits your bank account each month or year.
Read definition →A ratio that measures whether a rental property's income covers its debt payments — calculated by dividing rental income by total debt service (PITIA), where 1.0 means breakeven and 1.25+ means strong cash flow.
Read definition →The 1% rule is a quick screening formula that says a rental property's monthly rent should equal at least 1% of its purchase price — helping investors filter out deals unlikely to produce positive cash flow before running a full underwriting analysis.
Read definition →NOI (net operating income) is what a property earns from operations each year. Rental revenue minus vacancy loss and operating expenses. Before you subtract the mortgage, CapEx, or taxes.
Read definition →



