The Two-Metric Rental Screen
Cash flow per door and cash-on-cash return — hit both benchmarks and everything else takes care of itself.
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 4
- Confidence
- 88%
For traditional long-term rentals, Leonard boils the entire decision down to two numbers: monthly cash flow per door, and cash-on-cash return. The first tells you the property produces real profit; the second tells you that profit is worth the capital you sank into it. He is emphatic that the second is what saves you — a property throwing off $500 a month sounds better than one throwing off $250, but if the $500 took a million dollars and the $250 took ten grand, the $250 deal is dramatically better. His personal benchmarks are $250 per door per month and 15% or more cash-on-cash per year. Other investors build super complex financial models; Leonard deliberately does not. His claim is that if both benchmarks clear, everything else takes care of itself.
Origin
Leonard's simplification came from the same lesson that reshaped his stock investing: complex models with many inputs multiply the ways you can be wrong. Watching investors build increasingly intricate return models, he went the other direction and asked which minimum set of numbers actually drove outcomes. He landed on two, set fixed personal benchmarks, and found that deals clearing both did not present nasty surprises elsewhere.
Core principles
- 01Absolute cash flow is meaningless without the capital that produced it.
- 02Two well-chosen benchmarks beat a complex model you will not maintain.
- 03Set your thresholds in advance so deals are judged, not rationalized.
- 04If both metrics clear, the secondary concerns generally resolve themselves.
- 05Per-door normalization makes properties of different sizes comparable.
How to run it
- 1
Set your benchmarks before you look at deals
Decide your minimum monthly cash flow per door and your minimum annual cash-on-cash return in advance. Leonard uses $250/door/month and 15%+ cash-on-cash.
Pro tip Setting thresholds before you fall in love with a property is what stops you rationalizing a bad deal.
- 2
Calculate monthly cash flow per door
How much profit per door per month does this property produce after the mortgage and expenses? Per-door normalization lets you compare a duplex to a single-family fairly.
Watch out Raw monthly cash flow in isolation is a vanity number — it tells you nothing about efficiency of capital.
- 3
Calculate cash-on-cash return
Based on the amount of money you put into the property, how much cash are you generating per year on it? This is the metric that catches capital-inefficient deals.
Pro tip This is where the seller credit compounds — cutting cash-to-close directly raises cash-on-cash.
- 4
Apply both as a hard gate
Both benchmarks must clear. Missing either is a rejection. Leonard's finding is that when both clear, the rest of the deal's concerns resolve themselves.
Watch out Do not let a strong cash-on-cash rescue a deal that fails on absolute cash flow, or vice versa. They check different failure modes.
In the wild
Leonard's core illustration: a property cash flowing $500 a month sounds great on the surface. But what if you put in a million dollars to get that $500? Meanwhile another property makes only $250 a month, but you only put $10,000 into it.
→ On the surface the $500 looks better, but the cash-on-cash return for the $250 deal is dramatically superior — which is precisely why Leonard refuses to judge a rental on monthly cash flow alone.
Common mistakes
Judging on absolute cash flow alone
The headline monthly number ignores the capital that produced it. Without cash-on-cash, capital-heavy deals systematically look better than they are and you starve your own portfolio's growth rate.
Building a super complex model instead
Leonard notes that some investors have very complex financial models for this. More inputs means more chances for a wrong input to produce a wrong answer — the same failure that broke his early stock valuations.
Setting benchmarks after seeing the deal
If you decide what counts as acceptable while looking at a property you already want, the benchmark becomes a rationalization. The thresholds must be fixed in advance.
Is it for you?
Best for
Buy-and-hold rental investors who want a defensible, repeatable go/no-go standard they can apply consistently without a spreadsheet fortress.
Not ideal for
Flippers, appreciation-driven strategies, or institutional investors whose mandates require far more granular underwriting.
From the transcript
“there's really two things that i focus on and that is the monthly cash flow per door so how much profit per door per month…”
“you could have a property that cash flows 500 a month that's great right on the surface my threshold is roughly 250 a month per…”
“mine personally is 250 a month and i like 15 or more cash on cash per year and as long as you hit those two…”
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Robert Leonard