Why rent-to-price collapses as price rises
Rent as a share of price is not a constant. It falls hard as price rises, which is why an expensive house almost never works as a straightforward rental — and why the 1% rule is useless above the bottom of the market.
| Row | Plausible rent | As a share of price |
|---|---|---|
| $100,000 | $900 – $1,600/mo | 0.90% – 1.60% |
| $250,000 | $1,750 – $2,875/mo | 0.70% – 1.15% |
| $500,000 | $2,500 – $4,000/mo | 0.50% – 0.80% |
| $1,000,000 | $3,500 – $5,800/mo | 0.35% – 0.58% |
| $2,000,000 | $5,000 – $8,000/mo | 0.25% – 0.40% |
| $5,000,000 | $9,000 – $15,000/mo | 0.18% – 0.30% |
Bands from lib/rent-ratio, interpolated between anchors in log price. Rules of thumb, not comps — they exist to catch a figure that cannot be true, not to price a house.
Two prices set by two different things
A house has two prices. What someone will pay to own it, and what someone will pay to live in it for a month. Those numbers are set by different people answering different questions, and they come apart as the house gets more expensive.
Rent is bounded by a tenant's monthly income. However much someone loves a house, they cannot pay more each month than they earn, and rent competes with every other monthly cost in their life. Purchase price is bounded by nothing so tidy. A buyer is paying for a school district, a commute, a view, a lot size, and the expectation that all of it appreciates — and they can borrow against thirty years of future income to do it.
So as you climb the price ladder, the numerator stalls while the denominator keeps going. At the bottom of the market the two are close enough that 1% of price a month is achievable. At two million dollars it is a fantasy: you would need a tenant paying $20,000 a month for a house whose actual rental market tops out around $8,000.
What this means for underwriting
It means the 1% rule is not a rule. It is an observation about cheap properties in cheap markets that got promoted into a heuristic and then applied to everything. Above roughly $400,000 it stops describing anything real.
It also means expensive houses are not underpriced rentals waiting to be discovered. If a $2.8M house needs $26,000 a month to clear standard criteria and the market pays $8,000, no amount of negotiation closes that gap — the property would have to sell for under a million. This is not a market failure. It is what it looks like when an asset is priced by owner-occupiers and you try to underwrite it as an income stream.
Which is why institutional rental capital concentrates so heavily in the $150,000 to $400,000 band. Not because it is unglamorous, but because that is where the two prices are close enough for the arithmetic to work.
How to use the bands
Before you trust a rent figure, check it against the price. If a rent is well above the band for its price, one of the two numbers is wrong, and it is usually the rent — either an estimate that has drifted, or a figure copied from a different listing.
The calculator does this automatically now. Enter a rent above the plausible range and it says so, and if the rent the property would need is above the range too, it stops quoting that rent as a target and tells you the price that would work instead.
What this doesn’t show. These bands are rules of thumb, not comparables. Real markets vary enormously — a college town, a resort market, or a city with rent control will sit outside them for good reasons. Treat a figure outside the band as worth checking, not as proof of an error.
Run it on a property you’re looking at
Two numbers and the same engine that produced the table above returns the verdict, the tightest constraint, and the price that would make it work.