House Flipping 70% Rule Calculator

What exactly is the 70% rule in house flipping?

The 70% rule is a widely used guideline in real estate investing that helps flippers determine the absolute maximum price they should pay for a distressed property. It states that an investor should pay no more than 70% of the After Repair Value (ARV) of a property, minus the estimated repair costs.

The standard formula is:

(ARV × 0.70) - Estimated Repair Costs = Maximum Allowable Offer

This rule ensures that the investor has enough financial room to cover all holding costs, closing costs, real estate commissions, and ultimately secure a viable profit margin once the house is flipped.

How do you determine the After Repair Value (ARV) of a property?

To determine the ARV, you must analyze recent sales data of similar, renovated properties in the same neighborhood. This process is called running "comps" (comparables).

1. Find recent sales: Look for homes sold within the last 3 to 6 months.
2. Match criteria: Select properties with similar square footage, bed/bath count, year built, and lot size.
3. Assess condition: Ensure the comps reflect the fully renovated condition you plan to achieve.

Real estate agents, appraisers, and Multiple Listing Service (MLS) data are the most reliable sources for finding accurate comparable sales to establish a realistic ARV.

How do you accurately estimate the total repair costs?

Estimating repair costs requires a detailed, systematic approach rather than guesswork. Start by conducting a thorough property walkthrough to inspect major systems.

For maximum accuracy, bring licensed general contractors to the site to provide hard bids. Additionally, use a detailed spreadsheet to track every line item to ensure nothing is overlooked.

What specific expenses does the remaining 30% cover?

The 30% margin is not purely profit. It acts as a financial buffer designed to cover various overhead expenses and ensure the investor walks away with a return on their risk. It typically covers:

• Holding Costs: Property taxes, insurance, utilities, and loan interest during the rehab.
• Purchase Closing Costs: Title fees, loan origination fees, and transfer taxes.
• Selling Costs: Real estate agent commissions (usually 5-6%), staging, and seller concessions.
• Net Profit: The investor's actual take-home compensation (ideally 10-15% of the total ARV).

Is the 70% rule realistic in a highly competitive real estate market?

In highly competitive seller's markets, strictly adhering to the 70% rule can be very challenging. When housing inventory is low and demand is high, distressed properties rarely drop to price points that perfectly fit this mathematical formula.

Consequently, many investors are forced to adjust their margins to win bids. While the 70% rule remains an excellent baseline, flippers in hot markets frequently accept tighter margins. Success in competitive markets relies less on a rigid 70% rule and more on highly accurate, hyper-local cost estimations and finding off-market deals.

How do you calculate the Maximum Allowable Offer (MAO)?

The Maximum Allowable Offer (MAO) is calculated using a straightforward algebraic formula derived directly from the 70% rule.

MAO = (ARV × 0.70) - Estimated Repair Costs

Here is a step-by-step example:

• Step 1: Determine the ARV (e.g., $300,000).
• Step 2: Multiply by 70% ($300,000 × 0.70 = $210,000).
• Step 3: Subtract your estimated repairs (e.g., $40,000).
• Result: Your MAO is $170,000.

You should not offer a single dollar more than your MAO if you want to maintain your projected profit margins.

Are closing and holding costs included in the repair estimate or the 30% margin?

Closing and holding costs are not included in the repair estimate. Instead, they are factored entirely into the 30% margin.

When you multiply the ARV by 70%, that leftover 30% is a critical buffer specifically designed to absorb financing costs, property taxes, utilities, closing fees, agent commissions, and your net profit.

The repair estimate should be strictly dedicated to physical materials, labor, permits, and contractor fees required to renovate the property. Mixing holding costs into the physical repair budget will distort your formula and lead to inaccurate offers.

When might an experienced investor choose to bend the rule to 75% or 80%?

Experienced investors may safely bend the rule to 75% or 80% under several specific circumstances:

1. High-Priced Markets: In expensive cities, a 10% profit on a $1 million home still yields $100,000, making an 80% rule financially viable.
2. Light Cosmetic Rehabs: If a property only needs paint and carpet, the risk of hidden structural damage is incredibly low, allowing for tighter risk margins.
3. Cash Buyers: Investors using their own capital eliminate expensive hard money loan interest and origination fees, freeing up space in the budget.
4. Rental Conversions: If the goal is to hold the property as a rental (BRRRR strategy) rather than flip it, immediate equity is less critical than long-term cash flow.

How does the 70% rule protect you from unexpected project delays or market shifts?

The primary purpose of the 70% rule is risk mitigation. Real estate flipping is highly unpredictable, and the built-in 30% margin acts as a financial shock absorber.

If a renovation takes three months longer than expected, your holding costs (taxes, loan interest, utilities) will increase. If the housing market cools off during the rehab, you may be forced to sell the property for a lower ARV than initially projected. Because the 70% rule bakes a substantial profit and expense buffer into your initial purchase price, you can absorb these unexpected financial hits and still break even, rather than losing money.

How can you use the 70% rule data to justify your offer during seller negotiations?

Using the 70% rule data transforms a seemingly "lowball" offer into an objective, data-driven business proposal. Instead of haggling over emotions, you can present the seller with hard math.

You can justify your offer by showing them a transparent breakdown:

• The projected ARV: Supported by recent neighborhood comp data.
• The repair budget: Itemized costs showing exactly what needs fixing to reach that ARV.
• The business costs: Explaining that agents, closing fees, and holding costs consume a massive portion of the margin.

By showing the math behind your MAO, sellers understand your price is dictated by market reality, increasing the likelihood of an agreement.

Sources:

• BiggerPockets: The 70% Rule in House Flipping
• Investopedia: Guide to House Flipping
• Rocket Mortgage: What Is The 70% Rule In Real Estate?

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