Idaho real estate glossary

What is the 70% Rule in Real Estate Flipping?

The 70% rule is a widely used benchmark in fix-and-flip real estate investing that determines the maximum allowable purchase price for a property to protect potential profit margins.

Updated with grounded research as of 2026-07-22.

The short answer

The 70% rule in real estate flipping is an offer guideline that states an investor should pay no more than 70% of a home's estimated After-Repair Value (ARV), minus the estimated cost of needed repairs. This rule helps investors set a Maximum Allowable Offer (MAO) to ensure adequate gross profit margin after accounting for transaction fees, financing costs, and potential budget overruns.

Key facts

70% Rule Formula
Maximum Allowable Offer (MAO) = (After-Repair Value × 0.70) − Estimated Repair Costs
After-Repair Value (ARV)
The estimated fair market value of the home once all renovations and improvements are fully completed.
The 30% Margin Purpose
The remaining 30% accounts for holding costs, lender fees, closing/selling costs, agent commissions, unpredictable project overruns, and the investor's profit margin.

How the 70% Rule Works

The 70% rule acts as a quick preliminary screening tool for real estate investors evaluating fix-and-flip properties. By discounting the estimated After-Repair Value (ARV) by 30% before subtracting renovation expenses, the formula bakes in a protection buffer for project overhead and target profit.

For example, if a property has an estimated ARV of $300,000 and requires $45,000 in repairs, the 70% rule calculation is ($300,000 × 0.70) − $45,000 = $165,000. Under the rule, $165,000 represents the Maximum Allowable Offer (MAO) for the acquisition.

Why the 30% Buffer Matters

Beginning investors often mistake the 30% reduction as pure net profit, but it actually absorbs all non-renovation expenses involved in acquiring, holding, and reselling the asset.

  • Holding Costs: Property taxes, utility bills, hazard insurance, and HOA dues during the renovation and sales period.
  • Financing & Lender Fees: Interest payments, points, and origination fees associated with hard money or private equity loans.
  • Transaction Costs: Buyer and seller closing fees, title insurance, escrow charges, and real estate agent commissions upon resale.
  • Contingency Reserve: Protection against unexpected structural, mechanical, or permit-related construction overruns.

Applying the Rule in Local Housing Markets

While the 70% rule serves as a reliable rule of thumb, rigid adherence can be difficult in tight housing markets. In regions like Idaho's Treasure Valley—where Ada County recorded a median sale price of $517,550 and Canyon County reached $435,000 in May 2026—low inventory and competitive bidding often force flippers to adjust their threshold to 75% or 80%.

Investors must accurately gauge localized rehab labor rates and real estate trends. In higher-priced luxury segments, such as Eagle, ID, a 75% or 80% rule may still yield strong cash return, whereas entry-level inventory in fast-growing submarkets like Kuna or Nampa requires strict budgeting due to narrower profit margins.

Common questions

Does the 70% rule apply to real estate wholesaling?

Yes. Wholesalers frequently use the 70% rule formula to calculate their Maximum Allowable Offer (MAO) before subtracting their intended assignment fee to ensure the contract remains attractive to cash buyers.

When should an investor adjust the 70% rule percentage?

Investors often adjust the rule upward to 75% or 80% in competitive, high-demand markets with higher median home prices. Conversely, in higher-risk or rural markets with slow absorption, investors may lower the target percentage to 60% or 65% for added safety.

Can the 70% rule replace a full construction budget?

No. The 70% rule is only a preliminary filtering tool. Before closing on a property, flippers must conduct thorough site inspections, obtain contractor bids, and perform a full line-item financial evaluation.

Related Idaho questions

  • What is After-Repair Value (ARV) and how is it calculated?
  • How do holding costs impact a fix-and-flip profit margin?
  • What is a Maximum Allowable Offer (MAO) in real estate wholesaling and flipping?

Sources and verification