Those who invest in income properties evaluate dozens of listings before finding the right one. A quick filter is needed to discard, in a few seconds, the deals that don't stack up. This filter has a name: the 1% rule. It says that the monthly rent of a property should be at least 1% of the purchase price (plus costs). It is the most famous screening heuristic among real estate investors worldwide. The 1% rule calculator tells you the rent-to-price ratio of your deal, the gross annual yield, the rent that would be needed to meet the rule and gives you an immediate assessment. It is the tool to pre-select investments in an instant.

What the 1% rule is

The 1% rule (one percent rule) is a guideline used by real estate investors to quickly evaluate an income property: the monthly rent should be at least 1% of the purchase price. If you buy a property for 200,000, according to the rule it should generate at least 2,000 of rent per month. It is not a law nor a guarantee of profit: it is a quick filter, a "napkin test" to decide whether a property deserves deeper analysis or should be discarded right away. A property that passes the 1% rule has a good chance of generating positive cash flow; one that stays well below probably does not. It is the first sieve with which investors reduce hundreds of listings to a handful to analyze seriously.

How the 1% rule is calculated

The calculation is immediate: ratio = (monthly rent / purchase price) × 100. With 2,000 of rent and 200,000 of price: 2,000/200,000 × 100 = 1%. If the result is ≥ 1%, the property "passes" the rule. Alternatively, you can calculate the minimum rent required: 1% of the price (200,000 × 0.01 = 2,000). For a more accurate analysis, the rehab and closing costs are added to the price (the "all-in" investment), because the return matters on the total invested capital. The calculator gives you the ratio, the rent needed for 1% and the gross annual yield, so you immediately see where the deal stands relative to the threshold.

The 2% rule

There is also a more demanding version: the 2% rule, according to which the monthly rent should be at least 2% of the price. It is much harder to achieve and today almost impossible in developed markets: it is found mostly in cheap properties, low-cost areas or particular situations (often with corresponding risks or problems). A property that meets the 2% has very strong cash flow potential, but it must be looked at carefully: such a high ratio can hide a weak market, a difficult neighborhood or high management costs. The 2% rule is therefore more an exception than a realistic goal. The calculator signals whether your deal reaches this rare threshold.

Why it is useful: a quick screening

The value of the 1% rule is not precision, but speed. A serious investor examines a great many properties: applying a complete analysis (flows, expenses, taxes, financing) to each would take hours. The 1% rule allows you to discard in a few seconds the clearly unprofitable properties and to focus time only on the promising ones. It is a first-level filter: whoever passes it moves to the real analysis; whoever stays well below is set aside. This does not mean every property above 1% is a good deal or every property below should be discarded — it means the rule helps to prioritize. In a market with many opportunities, knowing how to filter quickly is a competitive advantage.

Rent-to-price ratio and gross yield

The 1% rule is closely linked to the gross annual yield. If the monthly rent is 1% of the price, the annual rent is 12% of the price: the 1% rule thus corresponds to a gross yield of 12%. A ratio of 0.5% monthly equals a yield of 6% annual; a 2% monthly a yield of 24%. The gross yield does not account for expenses, taxes and financing — it is "gross" — but it gives an immediate idea of the potential. Beware: a high gross yield does not guarantee a high net yield, because expenses can erode a lot. But as a first indicator, the link between the 1% rule and a 12% gross yield is an excellent compass to orient yourself. The calculator shows both.

The all-in investment (price plus rehab)

The classic 1% rule uses only the purchase price, but the more correct version considers the total "all-in" investment: price plus rehab costs, purchase expenses (notary, taxes, agency) and any other capital put in before renting. The reason is simple: the return should be calculated on the truly invested capital, not only on the price paid to the seller. A property bought for 180,000 but with 20,000 of work becomes a 200,000 investment: it is on this figure that the rent must return 1%. Ignoring the rehab costs makes the deal look better than it is. The calculator lets you enter these costs, computing the ratio on the all-in investment for a realistic assessment.

The 1% rule and cash flow

Why exactly 1%? Because investors' experience shows that, in many markets, a property that rents at 1% of the price has a good chance of generating positive cash flow after covering mortgage, expenses and management. With a rent equal to 1% monthly, usually something is left in your pocket each month; below 1%, the flow tends to become thin or negative. It is an empirical rule, calibrated on the historical ratios between rents, prices and costs. It is not universal: it depends on mortgage rates, local expenses, taxes. In periods of high rates, even 1% may not be enough for cash flow; in periods of low rates, less can suffice. But as an orientation threshold, 1% remains the most used reference for cash flow.

The 1% rule by type of market

The rent-to-price ratio varies enormously by market; here is how to interpret it:

In big cities and premium markets, reaching 1% is rare: prices are high relative to rents. In secondary markets and low-cost areas, 1% (or more) is more frequent. Adapt expectations to your market.

Example: rent needed by price

Here is the monthly rent required to meet the 1% and 2% rule at different prices:

If a 300,000 property rents at 1,800, it is at 0.6%: well below 1%. To pass the rule you would need 3,000 of rent, often unrealistic in many markets. This is how the rule quickly discards low-return deals.

Ratio and yield compared

The link between monthly ratio and gross annual yield is direct (× 12):

The 1% rule equals a gross yield of 12%. Remember it is gross: after expenses, taxes and financing the net yield will be significantly lower. But the ratio is an excellent starting point to quickly compare different properties.

The limits of the 1% rule

The 1% rule is powerful but crude, and must be used with awareness of its limits. It ignores expenses: two properties with the same ratio can have very different management, tax and maintenance costs. It ignores financing: the real cash flow depends on the mortgage, the rates, the down payment. It ignores appreciation: a property in a growing area may yield little in rent but a lot in revaluation. It does not consider quality: a very high ratio can signal a weak market or a problematic property. This is why the 1% rule is only an initial filter, not a purchase decision. Once the filter is passed, the complete analysis is needed: real cash flow, cap rate, cash-on-cash return, DSCR. The rule says "worth looking at"; it does not say "buy".

The 1% rule versus 50% and cap rate

The 1% rule is one of several real estate heuristics, each with a role. The 50% rule estimates that operating expenses absorb about 50% of the rent, helping to evaluate cash flow. The cap rate (net operating income divided by price) measures the return net of expenses but before financing. The cash-on-cash return measures the return on the cash actually invested. The 1% rule is the fastest and crudest: it looks only at rent and price, ideal for the first filter. The other metrics come in afterward, for the real analysis. A typical workflow: 1% rule to screen, then 50% rule and cap rate to estimate profitability, finally cash-on-cash and DSCR for the final decision. Each tool has its moment.

Why it is hard in expensive markets

In big cities and premium real estate markets, the 1% rule is almost impossible to meet. The reason is structural: prices grow more than rents. In a metropolis, an apartment may cost 500,000 but rent for 1,500 a month — barely 0.3%. This does not mean it is not an investment: in these markets the return comes more from value appreciation than from rent. Cash-flow-oriented investors seek secondary markets where the 1% rule is achievable; appreciation-oriented ones accept low ratios in exchange for capital growth. The 1% rule works best as a filter for cash flow investing. In expensive markets it must be interpreted differently: not a failure of the property, but a different return strategy.

What to do after the screening

The 1% rule only tells you whether a property deserves attention. If it passes, the work really begins. Estimate the real expenses (taxes, insurance, maintenance, management, vacancy). Calculate the actual cash flow after the mortgage. Verify the cap rate and the cash-on-cash return on the invested capital. Check the DSCR if you use leverage. Analyze the market (rental demand, price trends, neighborhood). Inspect the property to estimate the real rehab costs. The 1% rule is the first step of a process, not the last. It saves you time by discarding the clear "no's", but the purchase decision requires all the other numbers. Use it to filter, not to decide.

How the calculator works

Enter the purchase price and the expected monthly rent: you immediately get the rent-to-price ratio, the gross annual yield, the rent needed for the 1% rule and an assessment. If you add the rehab and closing costs, the calculator uses the all-in investment for a more realistic ratio. In a few seconds you know whether the property passes the 1% rule (or the 2%) and how it stands relative to the typical thresholds.

The data you need

You need two or three data. The purchase price of the property. The expected monthly rent (use a realistic market value, not an optimistic one). Optional but recommended: the rehab and closing costs (work, notary, taxes, agency), to calculate the ratio on the all-in investment. Use the gross monthly rent and the actual price. If the property needs renovation, including the work is essential to not overestimate the ratio. Remember that the 1% rule is a screening: for the decision you then need the expenses, the financing and the other metrics.

Common mistakes

• Using only the price while ignoring the rehab and closing costs (overestimated ratio).
• Using an optimistic rent instead of a realistic market one.
• Treating the 1% rule as a purchase decision rather than an initial filter.
• Ignoring that the yield is gross: expenses and taxes greatly reduce the net.
• Discarding good appreciation properties just because below 1% in an expensive market.

How to use the calculator

Use the 1% rule as a first filter when examining listings: enter price and rent and quickly discard what is well below the threshold. Add the rehab costs for properties that need work. Look at the gross annual yield to compare different properties. Use the rent needed to understand how much the property should yield to pass the rule. Remember: it is a screening, not a decision — promising properties should then be analyzed with cash flow, cap rate and cash-on-cash. Adapt the thresholds to your market: in expensive cities, a lower ratio can still be a good appreciation investment. It is an estimation and guidance tool, not financial or real estate advice.

Practical example

You are evaluating an apartment at 200,000 that you estimate you can rent for 2,000 a month, with no rehab costs. The calculation gives a rent-to-price ratio of 1% (it exactly passes the 1% rule, potential positive cash flow), a gross annual yield of 12%, a rent needed of 2,000 for the rule (which you reach) and a total investment of 200,000. The property passes the first filter and deserves a deeper analysis. But if 20,000 of work were needed, the all-in investment would rise to 220,000 and the ratio would drop to 0.91%: below 1%, to evaluate more carefully. Enter your numbers. The calculation is a guideline screening: the 1% rule ignores expenses, taxes, financing and appreciation, and the yield shown is gross. It does not replace the complete analysis (cash flow, cap rate, cash-on-cash, DSCR). It is an informational tool, not financial or real estate advice nor a guarantee of profitability.

Frequently asked questions

What is the 1% rule in real estate?

It is a guideline to quickly evaluate an income property: the monthly rent should be at least 1% of the purchase price. With a price of 200,000, you need at least 2,000 of rent per month. It is a quick filter, not a guarantee of profit.

How is it calculated?

Ratio = (monthly rent / purchase price) × 100. With 2,000 and 200,000: 2,000/200,000 × 100 = 1%. If ≥ 1% the property passes the rule. For a more correct calculation, the rehab and closing costs are added to the price (all-in investment).

What is the 2% rule?

It is a more demanding version: the monthly rent should be at least 2% of the price. It is much harder and today almost impossible in developed markets; it is found in cheap properties, often with corresponding risks. Such a high ratio must be looked at carefully.

What yield does the 1% rule correspond to?

To a gross annual yield of 12%: if the monthly rent is 1% of the price, the annual rent is 12%. A ratio of 0.5% monthly = 6% annual; 2% monthly = 24% annual. It is a gross yield, before expenses, taxes and financing.

Why is the 1% rule useful?

For speed: it allows you to discard in a few seconds the clearly unprofitable properties and focus on the promising ones. It is a first-level filter to pre-select among many listings, not a purchase decision. It helps to prioritize.

Should I include the rehab costs?

Yes, for a correct calculation. The return should be calculated on the total "all-in" investment (price + rehab + purchase costs), not only on the price. A property at 180,000 with 20,000 of work is a 200,000 investment: it is on this that the rent must return 1%.

What is a good rent-to-price ratio?

≥ 1% passes the rule (promising); ≥ 2% excellent but very rare; 0.7-1% below 1% but common in many cities; < 0.7% low, typical of expensive markets. Adapt expectations to your market: in big cities 1% is rare.

Does the 1% rule guarantee a good investment?

No. It ignores expenses, taxes, financing, appreciation and property quality. A high ratio can hide a weak market. It is only an initial filter: once passed, the complete analysis is needed (cash flow, cap rate, cash-on-cash, DSCR).

Why is it hard in expensive markets?

Because prices grow more than rents. In a metropolis an apartment may cost 500,000 and rent for 1,500 (0.3%). It is not a failure: in these markets the return comes from appreciation more than from rent. The 1% rule is meant for cash flow investing.

What is the difference with cap rate and the 50% rule?

The 1% rule looks only at rent and price (the fastest). The 50% rule estimates expenses at 50% of rent. The cap rate measures the return net of expenses. They are used in sequence: 1% to screen, then 50% and cap rate for profitability, finally cash-on-cash and DSCR.

What data do I need?

Two or three: the purchase price, the expected monthly rent (realistic market value) and, recommended, the rehab and closing costs for the all-in investment. Use the gross rent and the actual price. For properties needing renovation, including the work is essential.

What do I do after a property passes the rule?

Analyze seriously: estimate the real expenses, calculate the cash flow after the mortgage, verify cap rate and cash-on-cash return, check the DSCR if you use leverage, analyze the market and inspect the property. The 1% rule filters; the decision requires all the other numbers.

Is it real estate advice?

No, it is a guideline screening. The 1% rule ignores expenses, taxes, financing and appreciation, and the yield is gross. It does not replace the complete analysis. It is an informational tool, not financial or real estate advice nor a guarantee of profitability.

Updated July 2026