The 1% Rule, 50% Rule, and 70% Rule in Real Estate (When They Work and When They Don't)

This guide is part of our Deal Analysis Toolkit series.

Real estate rules of thumb exist because investors need to evaluate deals quickly. You can't run a full 30-minute analysis on every property that crosses your desk. When you're sorting through 50 leads, you need a way to kill the obvious losers in 30 seconds and focus your time on the ones worth digging into.

That's what these rules are: screening tools. They help you quickly filter deals that deserve a deeper look. But they are not decision tools. No experienced investor buys a property because it "passes the 1% rule." They buy it because the full analysis -- comps, expenses, cash flow, exit strategy -- checks out. The rules just tell you where to start.

Here are the five most commonly used rules, what they actually measure, and exactly when they work and when they'll steer you wrong.

The 70% Rule (for flippers and wholesalers)

Maximum Allowable Offer = ARV x 0.70 - Repair Costs

This is the foundational rule for fix-and-flip investors and the wholesalers who supply them. It says you should pay no more than 70% of the after-repair value, minus the cost of repairs.

Where the 30% comes from

That 30% margin covers three things: closing costs on the buy and sell side (typically 3-5% combined), holding costs during renovation (mortgage, insurance, taxes, utilities -- typically 3-6% depending on timeline), and profit (15-20%). When you add those up for an average flip, 30% is roughly right.

Worked example

ARV: $200,000. Repair costs: $35,000.

MAO = $200,000 x 0.70 - $35,000 = $140,000 - $35,000 = $105,000

At $105,000 purchase price, the flipper has $60,000 of gross margin ($200K - $105K - $35K) to cover closing costs, holding costs, and profit. For an in-depth look at how to calculate your actual MAO based on your specific costs, see our maximum allowable offer guide.

When it works

• Average-condition flips in average markets. The 70% rule was developed in the era of $100K-$250K houses where holding times were 3-6 months and renovation budgets were moderate. For these deals, it's a solid quick filter.
• Wholesaling. If you're assigning deals to flippers, the 70% rule tells you what your buyer will likely pay (minus your assignment fee). It's the starting point for your own MAO. But know that in competitive markets, wholesale deals commonly trade at 70-80% of ARV, so your buyers may accept 75% or higher.

When it breaks

• Hot markets. In competitive markets, flippers routinely pay 75-80% of ARV because demand for inventory is high and holding times are short. If you rigidly apply 70% in Dallas, Phoenix, or Charlotte, you'll never win a deal. Many wholesalers and buyers now work at 75% as their baseline. Experienced flippers adjust the percentage based on their actual cost structure.
• Expensive markets. On a $600K ARV, 70% leaves $180K in margin. The dollar amount is large enough that you can pay 75-78% and still make excellent profit. Percentage-based rules matter less when the dollar numbers are big.
• Very cheap properties. On a $60K ARV, 70% leaves $18K. After repairs, closing, and holding costs, there might be $3-5K of profit. The dollar margin is too thin even though the percentage looks right.
• Long renovations. If the rehab takes 9-12 months instead of 3-4, holding costs eat through that 30% margin fast. Adjust down to 65% for major renovations.

The 1% Rule (for rental investors)

Monthly rent should be at least 1% of the purchase price.

A $150,000 property should rent for at least $1,500/month. A $200,000 property should rent for at least $2,000/month.

Why 1% works as a threshold

At the 1% level, a property roughly breaks even on cash flow after accounting for operating expenses and a conventional mortgage. The exact math depends on interest rates, taxes, and insurance, but as a general screening tool, properties that meet 1% are likely to cash flow. Properties below 1% need exceptional circumstances (low taxes, no PM costs, below-market purchase) to work as rentals.

When it works

• Quick screening of rental potential. Scrolling through listings, the 1% rule tells you in two seconds whether a property is worth analyzing. You don't even need a calculator -- is the rent roughly 1% of the price?
• Mid-market properties in mid-market cities. In cities like Memphis, Cleveland, Indianapolis, Birmingham, and parts of Texas, the 1% rule works reasonably well for single-family rentals in B and C neighborhoods.

When it breaks

• High-value markets. Almost nothing meets the 1% rule in San Francisco, Los Angeles, New York, Seattle, Denver, or Austin. A $500K house that rents for $2,500/month is at 0.5%. Does that mean every rental in these markets is a bad investment? No. It means investors in these markets are buying for appreciation, tax benefits, and equity build -- not cash flow. Different strategy, different metrics.
• Very cheap properties. A $40K house that rents for $600/month hits 1.5%. Looks great. But properties at this price point often come with high maintenance costs, difficult tenants, frequent vacancy, and low appreciation. The rule says "pass" but reality says "proceed with extreme caution." See the cap rate trap discussion in our cap rate guide.
• Newer construction. A newer property that doesn't quite hit 1% may be a better investment than an older one that does, because maintenance and CapEx costs are dramatically lower for the first 10-15 years.

The 50% Rule (for rental investors)

50% of gross rental income goes to operating expenses (not including mortgage payments).

If a property rents for $1,500/month, expect $750/month in operating expenses. That leaves $750/month to cover your mortgage and cash flow.

What's included in the 50%

Property taxes, insurance, property management, maintenance, CapEx reserves, vacancy allowance, utilities (landlord-paid), HOA, lawn care, and any other non-mortgage expense. For a detailed breakdown of each line item, see our rental cash flow analysis guide.

When it works

• Portfolio-level estimation. Across a portfolio of 10+ single-family rentals held over 5+ years, operating expenses averaging 45-55% of gross rent is remarkably consistent. Individual properties vary, but the portfolio tends toward 50%.
• Quick NOI estimation. If you know the rent, you can estimate NOI in your head: NOI is roughly half the gross rent. This gets you close enough for initial screening and cap rate calculations.

When it breaks

• Newer properties. A property built in the last 10 years will have lower maintenance and CapEx costs. Operating expenses might be 35-40% of rent instead of 50%.
• Properties with HOA. A high HOA fee pushes operating expenses well above 50%, sometimes to 60-65%. The 50% rule doesn't account for this.
• Self-managed properties. If you don't pay a property manager (saving 8-10% of rent), expenses drop below 50%. But remember: your time has value. If you're spending 5 hours a month managing the property, that's uncompensated labor, not zero cost.
• Low-tax states. In states with very low property taxes (e.g., some areas of the Southeast), operating expenses may consistently run below 50%.
• High-tax states. New Jersey, Illinois, Connecticut, and Texas have property taxes that can exceed 2% of assessed value annually, pushing operating expenses above 50% on their own.

The 2% Rule

A stricter version of the 1% rule. Monthly rent should be at least 2% of the purchase price.

A $100,000 property should rent for $2,000/month. This is extremely rare in 2026 outside of low-income neighborhoods, Section 8 housing, and deeply distressed markets.

When it applies

The 2% rule was more achievable in the post-2008 era when properties were cheap and rents held relatively steady. Today, finding a 2% property in a decent neighborhood is almost impossible in most markets. If you do find one, it deserves deep analysis because either you've found an incredible deal or there's something wrong that the numbers aren't showing -- high crime, structural issues, environmental problems, or a market in decline.

The Rule of 72

72 divided by the annual growth rate equals the approximate number of years for an investment to double in value.

• At 3% annual appreciation: 72 / 3 = 24 years to double
• At 4% appreciation: 72 / 4 = 18 years to double
• At 6% appreciation: 72 / 6 = 12 years to double
• At 8% appreciation: 72 / 8 = 9 years to double

This rule isn't specific to real estate -- it works for any compound growth. But it's useful for putting property appreciation in perspective. National average home appreciation has been roughly 3-4% per year over the long term (though individual markets swing wildly). At 3.5%, your property roughly doubles in value every 20 years.

The Rule of 72 is most useful for long-term buy-and-hold investors evaluating whether appreciation alone justifies their investment. If a property is break-even on cash flow but appreciating at 6% in a growth market, the wealth-building math is still compelling.

Why rules fail in practice

Every one of these rules takes a complex, multi-variable reality and compresses it into a single number. That's useful for speed. It's dangerous for decisions.

Here's what the rules don't capture:

• Market trajectory. A property that fails the 1% rule in a market with 8% rent growth may be a better investment than one that passes in a market with flat rents.
• Tax benefits. Depreciation, mortgage interest deduction, and 1031 exchanges can dramatically change the after-tax return. The rules ignore taxes entirely.
• Value-add potential. A property that fails every rule at current rents might pass after a $15K renovation that raises rent by $300/month. The rules look at now, not after.
• Financing structure. The 70% rule and 1% rule were calibrated for conventional financing. If you're using seller financing, hard money, DSCR loans, or cash, the math changes.
• Local conditions. Landlord-tenant laws, eviction timelines, insurance costs, and property tax rates vary enormously by state and municipality. Rules calibrated for one market may not apply in another.

Rules of thumb are averages applied to specific properties. Your property is not average. Run the real numbers.

The right approach: screen, then analyze

Use rules of thumb as a 30-second filter. Look at a deal, apply the relevant rule, and make a quick pass/fail decision on whether it's worth your time. If it passes, do the full analysis: pull comps, estimate repair costs, run the cash flow numbers, calculate your ARV, and determine your actual return. See our deal analysis walkthrough for the complete process.

If a deal fails the screening rules, it might still be worth a closer look if there's an obvious reason (under-market rent, value-add opportunity, motivated seller). But most of the time, a deal that fails the rules is saving you from wasting 30 minutes on bad math.

Which rule for which strategy

For flippers and wholesalers: the 70% rule is your starting point, then refine with actual closing and holding cost estimates. Understanding how it connects to your exit strategy is what separates a confident offer from a guess.

For rental investors: start with the 1% rule to screen, use the 50% rule to estimate NOI, then run the full cash flow analysis with real numbers. The ARV vs ARR distinction matters here -- make sure you're using the right comp set for your strategy.

For BRRRR investors: you need both. The 70% rule helps you evaluate the acquisition and rehab phase. The 1% and 50% rules help you evaluate the rental and refinance phase. The deal needs to work at both stages.

Related Articles

• Deal Analysis Toolkit
• Maximum Allowable Offer
• Cash Flow Analysis for Rental Properties
• Cap Rate Explained
• How to Calculate ARV Step by Step
• ARV vs ARR: Which Matters for Your Exit Strategy?
• Exit Strategies Explained
• How to Estimate Repair Costs Without a Contractor
• How to Analyze Any Real Estate Deal in 30 Minutes