How the 1% rule works
The 1% rule says monthly rent should be at least 1% of the purchase price: $2,000 a month on a $200,000 property. It is blunt on purpose: two numbers from any listing, one division, and a pass means underwrite while a fail means skip.
If a property costs $200,000, the rule wants at least $2,000 of monthly rent. The logic is blunt arithmetic: at a 30-year loan near 20% down, rent at ~1% of price is roughly what it takes for a modestly financed property to self-fund, expenses and the mortgage together typically consume 85–90% of gross rent. Rent below 0.8% of price means the building usually cannot carry itself without a big down payment or an appreciation thesis.
Worked example
A $250,000 townhouse at $2,600 rent is 1.04%, so it passes. The same rent on a $350,000 price is 0.74%, a clear fail. Identical income, opposite verdicts: the rule judges the price, never the property.
A $250,000 townhouse renting at $2,600 is 1.04%, it passes. The same $2,600 rent on a $350,000 price is 0.74%, a clear fail, and the kind of deal many metro listings actually are: the rule fails most of suburban America at today's prices, which is exactly why cash-flow investors use it with a yield target, not instead of one.
Worked example 2: the same property in two markets
Same house, same rent, same expenses, two prices, two verdicts. At $165,000 the rent clears the 1% line; at $340,000 the identical property fails it. The rule measures the market's pricing, not the building's quality, so location does nearly all of the work.
Take one three-bedroom, two-bath rental at 1,500 square feet, renting for $1,800 a month, which is $21,600 of gross rent a year. Operating expenses run 45% of that rent, $9,720 a year or $810 a month, which leaves NOI of $11,880 a year, or $990 a month. In a Midwest cash-flow market the house lists at $165,000. Monthly rent is 1.09% of price, so it passes, and the $11,880 of NOI is a 7.2% cap rate.
In a coastal metro the same house lists at $340,000 with the rent unchanged. The ratio drops to 0.53%, a clear fail, and the cap rate falls to 3.5%. To pass, that house would need $3,400 a month, nearly twice the rent it actually collects. Finance both identically at 20% down and 7% for 30 years and the verdicts separate further. The $165,000 house carries an $878 payment against $990 of monthly NOI, leaving about $112 of cash flow. The $340,000 house carries a $1,810 payment against the same $990, so it runs roughly $820 short every month, about $9,800 a year out of pocket.
That is the whole lesson: 1% is a market-specific bar, not a universal one. Nothing about the building changed, only what its location made it cost. The coastal buyer is underwriting appreciation and rent growth that the ratio cannot see, and real taxes and insurance there run higher than the Midwest figures, which widens the gap rather than closing it. Use the 1% rule to rank deals inside one market, then compare markets on total return instead of on this ratio. The honest read: the rule fails the coastal deal on cash flow, and the coastal buyer has to be paid back some other way.
Case study: screening 15 listings with the 1% rule
A rent-to-price screen tears through a listing sheet in minutes, one division per line. Of fifteen listings, four clear the 1% bar, two survive a second look, and one earns a real underwrite. The rule's value is the eleven it removes, not the one it approves. Investors do not screen to find the winner, they screen to avoid spending an evening on eleven losers.
Five of the fifteen show how the arithmetic sorts them. A $142,000 duplex at $1,500 a month is 1.06%, a pass with $80 of cushion over the line. A $215,000 single-family at $1,850 is 0.86%, a fail that falls $300 short of the $2,150 the rule wants. A $96,000 house at $875 is 0.91%, a near miss that needs $85 more rent a month to clear.
A $178,000 triplex at $1,790 total is 1.01%, a pass by $10, which is too thin to trust. A $310,000 townhouse at $1,900 is 0.61%, a fail that misses the line by $1,200 a month and never deserved a second minute. Nothing about those five verdicts required a rent comp, an expense run, or a loan quote, which is the whole appeal at this stage.
The second look kills more of them. The $178,000 triplex rents by the unit at $597 each, three one-bedrooms sharing one water heater, and a single vacancy erases that $10 cushion, so it drops out. The $142,000 duplex needs a $9,000 roof and $5,000 of closing costs, which takes the all-in basis to $156,000 and the ratio to 0.96%, a fail. That leaves two candidates, then one after inspection. The lesson: the rule is a fast filter, not a decision. It is excellent at saying no and completely silent on whether the survivor is worth buying. Every number it produced was honest and incomplete, because a ratio cannot price a roof or a water heater.
When the rule is worth breaking
Break the rule when the return lives outside the rent: strong appreciation, unusually low expenses, or a long hold where amortization builds the equity. A 0.7% property in a growing market can beat a 1.1% property that never appreciates.
The 1% rule was born in Midwest and Sun Belt single-family markets and it still screens them well. It fails to capture: appreciation (a 0.7% SFH in Austin has outperformed on total return), low expense ratios (new-construction HOAs with free warranties), and long-term holds where the mortgage amortizes into equity. What the rule does well is speed: it is the reason experienced investors can look at a listing photo, the price, and the Zestimate rent, and say no in ten seconds.
Reading the pass/fail badge with the other numbers
Treat 1% as a smoke alarm, not a verdict. A fail means check cap rate and cash-on-cash before walking away; a pass with expenses above half of rent is a busy operation, not a bargain.
Treat 1% as a smoke alarm. If it fails, check the cap rate and cash-on-cash: a 0.8%-rent property can still cash-flow if expenses are low and the down payment is big. If it passes but expenses exceed 50% of rent, you are running a high-turnover operation, not a bargain. And when you compare deals in the saved-scenarios table, the ratio column makes the rule a one-glance sort across all of them. For where this screen sits among the other five metrics, see the full comparison table.
The 1% rule and GRM are the same idea
The 1% rule is the GRM test stated as a percentage. 1% monthly rent is a GRM of 8.3, and 0.83% is a GRM of 10. The full conversion arithmetic lives here.
Use whichever framing is easier to eyeball (rent-to-price on a listing, GRM when comparing buildings), but count them as one screen, not two. Underwriting guides that list GRM and the 1% rule as separate checks are double-counting the same arithmetic.
A practical screening stack
Screen in tiers and let the 1% rule work only the first one: ten seconds on the rent ratio, two minutes on expenses and cap rate, thirty minutes on financing. Its job is saying no fast so diligence goes to survivors.
Instead of the bare rule, use a three-tier stack. Tier 1 (10 seconds): does rent ≥ 0.7% of price? Below that, pass, unless the market has 10% annual appreciation. Tier 2 (2 minutes): does the expense ratio land under 45% of rent, and does the resulting cap rate beat your floor (say 6% for a standard SFR)? Tier 3 (30 minutes): run financing: DSCR ≥ 1.25× via the lender's coverage screen, positive CoC, grade comes out A or B. The rule only earns its keep at tier 1, where its job is saying no 90% of the time so you can spend your real diligence minutes on the deal that survives.
The rule bends by property type
The 1% bar was tuned for single-family rentals, so everything else shifts it: small multifamily can win at 0.9%, house-hacks at 0.6–0.8%, and condos only count on net-of-HOA rent.
The 1% bar was tuned for long-term single-family rentals, and every other structure shifts it. Duplexes to fourplexes: rent per unit drops as unit size shrinks, but the roof and lot are shared, so 0.9% on a triplex often beats 1.1% on a SFR after expenses. Owner-occupied multi-unit (house hacking): the "price" is one mortgage and you live in a unit, so effective yield hides in your personal rent savings; investors commonly accept 0.6–0.8% for that. Room-by-room: gross rent can clear 1.5–2% of price, but turnover, vacancy, and compliance eat it, the rule stops being a shortcut entirely. Condos: HOA and insurance drag net yield, apply the 1% rule to net-of-HOA rent. The number is a default; adjust it to the operating profile, then let the cash-on-cash return be the referee.
The 50% rule: the arithmetic sibling
The 50% rule says half of gross rent vanishes into operating expenses (vacancy, repairs, management, CapEx, insurance, and tax) before the mortgage sees a dollar. What's left, the other half, is what covers debt service and profit.
On a $2,000 rent, the rule budgets $1,000 to expenses and hands $1,000 to the lender and you combined. A $700 mortgage payment leaves $300 a month of cash flow; a $1,050 payment leaves the property $50 short. That pairs with the 1% rule's own logic from the first section: if expenses take roughly half the rent and the mortgage takes another 35–40%, the property self-funds with a thin cushion, which is exactly why 1% is the line, and why anything far below it needs a bigger down payment or an appreciation thesis to survive.
1% rule vs 2% rule vs 50% rule: three screens
The three rules filter different markets. The 1% rule is the standard screen for US residential, the 2% rule targets low-cost, high-risk deals that need room for heavy expenses, and the 50% rule estimates the expense side rather than testing price. Used together they narrow a list fast.
The two rent rules are the same arithmetic at different bars, so never run both as separate checks. The 50% rule is a different question entirely: it says nothing about price and everything about how much rent the building keeps. That is why it pairs well with a rent-to-price screen, one question about the price and one about the operating load.
Each rule answers a different question. The 1% and 2% rules test rent against price at different bars, while the 50% rule estimates expenses as a share of rent. Here is what each one measures, when it passes, and the market it fits.
| Rule | What it tests | Formula | When it passes | Market fit |
|---|---|---|---|---|
| 1% Rule | Whether rent can plausibly cover expenses and debt | monthly rent ÷ price, 1% or higher (a GRM of 8.3 or better) | Rent reaches 1% of price, $2,000 on a $200,000 property | Standard US residential: single-family and small multifamily, especially Midwest and Sun Belt cash-flow markets |
| 2% Rule | Whether rent clears heavy expenses with room to spare | monthly rent ÷ price, 2% or higher (a GRM of 4.2 or better) | Rent reaches 2% of price, $1,200 on a $60,000 duplex | Low-cost, high-risk markets; self-managed, room-by-room, or multi-unit deals with heavy expenses |
| 50% Rule | How much of rent operating expenses consume, before the mortgage | operating expenses near 50% of gross rent | Half the rent survives expenses to cover debt service plus profit | Any rent figure as a fast expense estimate; a companion to the price screens, not a rent-to-price test |
The 1% and 2% rules both screen price; the 50% rule estimates expenses, so run it only after a rent-to-price screen passes.
Reverse: what rent do I need to hit 1%?
Flip the rule and it becomes a target: the rent you need is the purchase price times 1%. A $200,000 property needs $2,000 a month, a $350,000 property needs $3,500, and a $500,000 property needs $5,000. The formula works on any price in one multiplication.
Run the three prices side by side and the pattern is obvious: each one asks for 1% of itself. A $200,000 house at $1,700 rent is $300 short of the $2,000 target, a 0.85% ratio. A $350,000 house at $2,900 rent is $600 short of $3,500, a 0.83% ratio. A $500,000 house at $4,200 is $800 short of $5,000, a 0.84% ratio. The gap, not the ratio, is what you negotiate against: $300 a month is a rent bump you can chase, while $800 a month is a different neighborhood or a much larger down payment.
Once you know the required rent, the question becomes what to do with the gap. In a growth market, a gap can be rational if you can close it yourself: a renovation that lifts rent from $1,700 to $2,000 converts a 0.85% listing into a 1.00% property, and the gap you bought is the value-add thesis. If appreciation is the whole thesis, the gap is the price of admission and the cash flow is negative by design. In a cash-flow market, a persistent gap is usually a deal-killer, because nothing in that market is going to raise rent for you.
The calculator turns this into a live check. Enter the price and the rent and the badge updates as you type, reading "Clears 1%" or "Below 1%", while the ratio shows how far the rent sits from the line. Multiply the price by 1% to name the exact target, then decide whether the gap is closable or disqualifying.
How to source rent comps for the 1% rule
The rule lives or dies on the rent you enter, so use signed leases, not asking prices. A listing that advertises $1,900 while comparable units sign at $1,750 turns a 1.06% pass into a 0.97% fail on the same $180,000 price.
Signed comps beat active listings for one reason: an asking rent is a wish and a signed lease is a fact. A unit that sits vacant at $1,900 for six weeks is telling you $1,900 is too high, while the lease that signs at $1,750 is what that unit is actually worth. Match three to five closed leases within a mile or two, in the same bed-and-bath count and condition, signed in the last six to twelve months. Pull them from MLS rental history if you have access, from Zillow and Rentometer for a first pass, and by calling two or three local property managers who will quote the rent they actually achieve. Market rent is what the next tenant pays; contract rent is what the current tenant pays under the existing lease. When the two differ, a below-market lease is a future rent increase and an above-market lease is a rent cut waiting to happen.
A seller pro forma is the most common source of inflated rent. A document that lists $2,000 for a unit with no signed lease is an asking number wearing a spreadsheet's clothes. Check the current lease, the rent roll, and the deposit history, and if the seller claims market rent is higher, ask for the comps behind the claim. The gap matters twice: it inflates the ratio today and it sets up a reduction at renewal. Run the 1% rule on the lower of the two numbers and treat the difference as upside you have not earned yet.
If a rent figure is not backed by a signed lease or a matched comp, it is an assumption, and the ratio has no way to flag it. Buyers spend an hour on the denominator and four seconds on the numerator. Give the rent the same proof you give the price.
The rent in the numerator is a full month, and the rule quietly assumes you collect one every month. A single mid-month turnover is a partial month the ratio never shows, and the prorated rent calculator prices it from the two dates. A 1% pass with two turnovers a year collects closer to 0.98% before any other expense lands.
What rent-to-price ratio still works at today's rates
At 80% LTV and a 45–50% expense ratio, the self-funding rent-to-price band runs from roughly 0.87% at a 6% rate to roughly 1.17% at 8%, so the 1% line sits inside today's band, not above it. The rate moved the bar; the rule still marks the middle.
The bands, derived from the payment math: at 6%, 0.87–0.96%; at 6.5%, 0.92–1.01%; at 7%, 0.97–1.06%; at 7.5%, 1.02–1.12%; at 8%, 1.07–1.17%, each pair spanning 45% to 50% expenses. Read it as the derivation, not a forecast: the mortgage payment is the moving part, the expense share is the assumption, and the ratio is the quotient. At 7% and 45% expenses the bar is 0.97%, a hair under the rule; at the same rate with 50% expenses it is 1.06%, a hair over. That is the whole 'still relevant' debate in one paragraph: 1% was never a law, it is the middle of a band that rates slide up and down.
Common 1% rule mistakes
Four mistakes break the rule before it can help: pricing off the listing instead of all-in cost, trusting asking rent instead of market rent, reading a pass as proof of profit, and chasing 2% yields into the roughest neighborhoods.
The denominator should be everything you pay (price plus closing plus rehab), because a 1% pass on the listing can be 0.85% on all-in cost. The numerator should be rent the market actually pays, verified against comps, not the seller's pro forma. A pass only means cash flow is possible, so underwrite expenses before celebrating. And a 2% ratio on a $60,000 duplex usually prices in tenants and repairs that erase the yield. The rule found the deal and the diligence should still kill it.
Here is what each mistake costs in numbers. A $250,000 listing at $2,500 rent is exactly 1.00% and passes. Add 3% closing costs and a $12,000 rehab and the all-in basis becomes $269,500, where the same rent is 0.93%, a fail the listing never showed you. On the other side, a $195,000 property with a seller pro forma of $2,000 rent reads 1.03%, but the signed comps say $1,750, which is 0.90%. Both errors run the same direction, and either can flip a pass into a fail before you are under contract.
Reading a pass as proof of profit fails hardest where fixed costs are heavy. A $200,000 condo at $2,100 rent passes at 1.05%. Now add $350 a month of HOA dues, $3,600 of taxes, $1,200 of insurance, 5% vacancy, $1,500 of maintenance, and 8% management. Expenses reach $13,440 a year, 53% of rent, so NOI is $11,760, about $980 a month. At 20% down and 7%, the $1,064 payment leaves the property roughly $84 short every month. A pass with a 53% expense ratio is a job, not a profit.
Chasing 2% into rough neighborhoods carries its own arithmetic. A $60,000 duplex at $1,200 is exactly 2.00%, the widest cushion on the sheet. Budget 15% vacancy and 15% repairs for that tenant base and expenses reach roughly 65% of rent, so NOI is about $5,040 a year, or $420 a month. The $319 payment still leaves $100 a month, which is exactly why the deal looks good, until one eviction, a month of vacancy, and a $5,000 turnover erase four years of it.
Frequently asked questions
14 answers, no funnel.
What is the 1% rule in real estate?
A screening rule: monthly rent should be at least 1% of the purchase price. It is a quick filter for whether a rental can plausibly cash-flow, not an investment thesis by itself.
Is the 2% rule better?
The 2% rule (rent at 2% of price) targets cheap multi-unit and rooming-house deals where self-management and room-by-room renting are part of the model. Most buyers will never see 2%.
What rent-to-price ratio equals a 6% cap rate?
Depends on expenses, not rent alone. At a 40% expense ratio, a 6% cap needs rent near 0.83% of price (10% net ÷ 12). At a 50% expense ratio it takes about 1%.
Does the 1% rule still work in 2026?
As a screen, yes; as a guarantee, never. At 80% LTV and typical expenses the self-funding band runs roughly 0.9–1.1%, so the 1% line still marks the middle of it. What changed is the hit rate, not the math.
What is the difference between the 1% rule and the 2% rule?
Both are rent-to-price screens at different bars: 1% monthly (≈GRM 8.3) asks whether cash flow is plausible; 2% monthly (≈GRM 4.2) demands it even under heavy expenses. The 2% bar mostly survives in cheap, high-risk multi-unit deals.
Can you still find 1% rule properties today?
Yes, wherever rent-to-price ratios allow it, which this calculator tests in one keystroke. The rule rejects whole markets by design; it was built to say no fast, not to approve often.
What's a good rent-to-price ratio in expensive markets?
The same bands, read against local comps: underwrite expenses and the cap rate first, then let the ratio describe the result instead of setting the target. Good is relative; the arithmetic isn't.
What rent-to-price ratio do lenders look at?
None directly. Lenders underwrite net operating income against debt service (the DSCR screen), not a rent-to-price ratio. The 1% rule is an investor shortcut; the bank runs its own math.
What is the 2% rule?
The 2% rule is a stricter version: monthly rent should equal at least 2% of the purchase price. A $100,000 property would need $2,000 monthly rent. It rarely appears in major US markets outside low-cost areas.
Is the 1% rule realistic?
Rarely in major US markets at current prices. Coastal and Sunbelt markets usually trade well below 1%. The 1% rule is achievable in Midwest and Southern cash-flow markets and in value-add properties where rent can be raised after purchase.
How to calculate the 1% rule in real estate?
Divide monthly rent by the purchase price. A $250,000 property renting for $2,500 a month hits exactly 1.0% and passes. If rent is $2,000, the ratio is 0.8% and the property fails the screen.
What is the difference between the 1% rule and cash-on-cash return?
The 1% rule is a rent-to-price screen: monthly rent ÷ purchase price. Cash-on-cash is a return metric: annual cash flow ÷ cash invested. The 1% rule filters listings before you look; cash-on-cash tells you what the deal actually pays after financing.
Does the 1% rule include taxes and insurance?
No. It divides rent by price before any expenses, so taxes, insurance, and the mortgage are all excluded. A pass only means costs might be covered, which is why you underwrite expenses next.
Does the 1% rule apply to commercial property?
Rarely. The bar was set for residential single-family and small multifamily. Commercial deals trade on cap rate, DSCR, and lease quality, where rent-to-price varies too widely to screen with one line.